Files     2933     53#
acura — 2
alfa romeo — 8
amc — 27
audi — 4 — 2#
bmw - mini — 22 — 4#
buick — 44
cadillac — 7
      — Northstar — 3
chevy — 611 — 1#
    &n1111 — lsx — 230
      — ltx — 80
      — 4.3l v6 — 9
      — ecotec — 4
chevy_big_block — 365
      — 409 — 14
chrysler — 7
      — jeep — 13
      — neon — 8
      — viper - v10 — 14
      — la — 121
      — hemi — 31
chrysler_big_block
      — rb — 125
      — early hemi — 10 — 1#
      — hemi — 42
citroen — 0 — 2#
ferrari — 11
fiat — 2
ford — 34 — 18#
      — v6 3.5 3.7 ecoboost — 2
      — v6 3.8 — 7
      — cleveland — 39
      — modular — 56
      — windsor — 279
ford_big_block
      — fe — 39 — 1#
      — 385 series — 122 — 1#
gmc - v6 — 2
gm_duramax_diesel — 3
holden — 8
honda — 34
hyundai — 7
jaguar — 1
lotus — 0 — 1#
mazda — 12
mercedes — 6
mgb — 4
mitsubishi — 20 — 2#
nissan — 20
olds — 38
opel / vaux — 23 — 4#
peugeot — 1
pontiac — 137 — 1#
      — 3800 v6 — 10
porsche — 10
renault — 4
rover — 2 — 2#
studebaker — 9
subaru — 15 — 2#
toyota — 40
volvo — 16 — 2#
vw — 36 — 9#
          ———————
buell — 4
harley-davidson — 63
honda — 1
jawa — 1
kawasaki — 4
kohler — 1
suzuki — 7
triumph — 1
yamaha — 4

275 2v/3v Intake Files — 38#

# - DFW Only Numbers
38 2v/3v Intake Files
 
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DFW or FLW Files

A Package of more than 2925 flow files for use with Dyno simulation programs.
I have formatted each cylinder heads information into individual files for use with different versions of DeskTop Dyno, DynoSim, Comp Cams CamQuest program, Dynomation Versions 4 and 5 and Performance Trends Engine Analyzer. The files will be in separate folders for the different engine types. See tree view to left. Download a Sample DFW File for Dynamation 5.0 (.5KB) or a Sample DFW File for Camquest 6.0 (.5KB) or a Sample FLW File (.5KB) or a Sample DFW File for Performance Trends Engine Analyzer v3.9 (.5KB) to see which of these files will work with your simulation software.
Price $34.95 - Add $5.95 for shipping and handling if you want a CD-ROM.   Online Purchasing
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Cylinder Head Flow Data at 28 Inches of Water

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[Acura] [Alfa Romeo] [AMC] [Audi] [BMW] [Buick] [Cadillac] [Chevy] [BB Chevy] [Chrysler] [BB Chrysler] [Citroen] [Cummins] [Ferrari] [Fiat] [Ford] [BB Ford] [GMC] [GM Duramax Diesel] [Holden] [Honda] [Hyundai] [Jaguar] [Lotus] [Mazda] [Mercedes] [MGB] [Mitsubishi] [Nissan] [Olds] [Opel / Vauxhall] [Peugeot] [Pontiac] [Porsche] [Renault] [Rover] [Saab] [Studebaker] [Subaru] [Toyota] [Volvo] [VW] ——— [Buell] [Harley-Davidson] [Honda] [Jawa] [Kawasaki] [Kohler] [KTM] [Rotax] [Suzuki] [Triumph] [Yamaha] ——— [IH]
Peak Horse Power

 
 
These numbers have come from various magazines, web sites, manufactures catalogs, and ???
We have tried to verify the accuracy of these numbers but use at your own risk!

ALL Volume numbers are in CCs. — ALL Flow numbers are in CFM.

 
Where do MOST of the numbers come from?



Cylinder Head Flow Data Table

Acura     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 Average
1.8l Type R CCHN/A33mm/ 28mmN/A-------262/207
79%
98.8/108
293/321
.489/.455
----
-
-
.263/.223
1.8l Type R Ported CCHN/A33mm/ 28mmN/A-------299/242
80.9%
113/127
334/376
.558/.532
----
-
-
.263/.223
GSR Alaniz Cyl HeadsN/A33mm/ 28mmN/A77/-123/-154/-
58.1
172
.646
174/-
65.6
194
.584
194/-
73.2
217
.543
215/-
81.1
240
.515
232/-
87.5
259
.487
245/-
92.4
274
.457
256/-
96.6
286
.43
--199
-
-
.263/.223
GSR Ported Alaniz Cyl HeadsN/A-N/A75/-117/-151/-
-
179/-
-
209/-
-
236/-
-
256/-
-
271/-
-
279/-
-
--212
GSR Ported WAT PorflowN/A33mm/ 28mm
81mm
N/A84/70
83.3%
119/111
93.3%
150/150
100%
56.6/78.6
168/233
.629/.742
183/176
96.2%
69/92.2
205/273
.614/.696
213/188
88.3%
80.3/98.5
238/292
.596/.62
237/195
82.3%
89.4/102
265/303
.568/.551
255/197
77.3%
96.2/103
285/306
.535/.487
267/198
74.2%
101/104
298/307
.498/.435
280/203
72.5%
106/106
313/315
.47/.401
--213/177
83.2%
-
.263/.223
1.8l GSR CCHN/A33mm/ 28mmN/A-------250/189
75.6%
94.3/99
279/293
.466/.415
----
-
-
.263/.223
1.8l GSR Ported CCHN/A33mm/ 28mmN/A-------290/234
80.7%
109/123
324/363
.541/.514
----
-
-
.263/.223
RSX-S Alaniz Cyl HeadsN/A35mm/ 30mmN/A83/-130/-173/-
58
172
.684
208/-
69.7
207
.658
234/-
78.5
232
.617
254/-
85.2
252
.574
269/-
90.2
267
.532
280/-
93.9
278
.492
285/-
95.6
283
.451
--229
-
-
.279/.239
RSX Ported CHR Motorsports LLC Home Made BenchN/A35mm/ 30mm
-
Radius on Exhaust
N/A95/113
118%
131/148
113%
162/175
108%
54.3/79.9
161/237
.641/.808
192/200
104%
64.4/91.3
191/270
.608/.738
213/213
100%
71.4/97.2
212/288
.562/.655
234/226
96.6%
78.5/103
232/306
.529/.596
251/232
92.4%
84.2/106
249/314
.496/.535
264/237
89.8%
88.5/108
262/320
.464/.486
277/241
87%
92.9/110
275/326
.438/.445
286/244
85.3%
95.9/111
284/330
.411/.409
293/245
83.6%
98.2/112
291/331
.386/.377
230/216
93.8%
-
.279/.239


Alfa Romeo     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol 1mm 2mm 3mm 4mm 6mm 8mm 10mm 11mm 12mm 13mm 14mm 15mm 16mm Average
2.0l Jim KN/A44mm/40mmN/A18/18
100%
42/42
100%
64/62
96.9%
27.2/31.8
80.5/94.3
.682/.727
78/75
96.2%
33.1/38.5
98.1/114
.623/.659
110/89
80.9%
46.7/45.7
138/135
.586/.522
133/99
74.4%
56.4/50.8
167/151
.531/.435
144/105
72.9%
61.1/53.9
181/160
.46/.369
147/107
72.8%
62.4/54.9
185/163
.427/.342
149/109
73.2%
63.2/56
187/166
.397/.319
151/110
72.8%
64.1/56.5
190/167
.371/.298
---113/88.7
78.4%
-
.351/.319
2.0l Jim K Exhaust PortedN/A44mm/40mmN/A18/20
111%
42/42
100%
64/64
100%
27.2/32.9
80.5/97.4
.682/.75
78/75
96.2%
33.1/38.5
98.1/114
.623/.659
110/92
83.6%
46.7/47.2
138/140
.586/.539
133/107
80.5%
56.4/54.9
167/163
.531/.47
144/117
81.3%
61.1/60.1
181/178
.46/.411
147/120
81.6%
62.4/61.6
185/183
.427/.384
149/124
83.2%
63.2/63.7
187/189
.397/.363
151/125
82.8%
64.1/64.2
190/190
.371/.338
---113/96.2
85.1%
-
.351/.319
2.0l Jim K 1mmOS ValvesN/A45mm/41mmN/A18/18
100%
42/42
100%
64/62
96.9%
26/30.3
76.9/89.8
.667/.709
84/84
100%
34.1/41
101/122
.656/.72
122/110
90.2%
49.5/53.8
147/159
.636/.629
149/119
79.9%
60.4/58.2
179/172
.582/.51
164/122
74.4%
66.5/59.6
197/177
.513/.419
171/124
72.5%
69.4/60.6
206/180
.486/.387
172/124
72.1%
69.8/60.6
207/180
.448/.355
174/124
71.3%
70.6/60.6
209/180
.418/.327
---127/101
79.8%
-
.359/.327
2.0l Ported Stage 2 Jim KN/A46mm/38mmN/A20/17
85%
44/35
79.5%
64/52
81.3%
24.8/29.6
73.6/87.6
.652/.642
84/67
79.8%
32.6/38.1
96.6/113
.642/.62
124/97
78.2%
48.1/55.2
143/163
.632/.598
154/110
71.4%
59.8/62.6
177/185
.589/.509
177/119
67.2%
68.7/67.7
204/201
.541/.44
184/122
66.3%
71.4/69.4
212/206
.511/.411
189/124
65.6%
73.4/70.5
217/209
.482/.382
192/125
65.1%
74.5/71.1
221/211
.452/.356
---135/94.6
70.2%
-
.367/.303
2.0l Ported Stage 3 Jim KN/A46mm/38mmN/A20/17
85%
45/35
77.8%
67/52
77.6%
26/29.6
77.1/87.6
.683/.642
89/67
75.3%
34.6/38.1
102/113
.68/.62
136/97
71.3%
52.8/55.2
156/163
.693/.598
172/110
64%
66.8/62.6
198/185
.657/.509
192/119
62%
74.5/67.7
221/201
.587/.44
197/122
61.9%
76.5/69.4
227/206
.548/.411
201/124
61.7%
78/70.5
231/209
.512/.382
201/125
62.2%
78/71.1
231/211
.473/.356
---144/94.6
65.5%
-
.367/.303
155 TS Ported Andreas Engstr”m welded and epoxiN/A47mm/38mm
84mm
Pipe
N/A28/25
89.3%
50/43
86%
66/66
100%
24.5/37.5
72.7/111
.658/.814
87/87
100%
32.4/49.5
95.9/147
.651/.805
132/126
95.5%
49.1/71.7
145/212
.658/.777
177/155
87.6%
65.8/88.2
195/261
.662/.717
213/166
77.9%
79.2/94.4
235/280
.637/.614
225/167
74.2%
83.7/95
248/281
.612/.562
228/167
73.2%
84.8/95
251/281
.569/.515
232/169
72.8%
86.3/96.1
256/285
.534/.481
235/170
72.3%
87.4/96.7
259/287
.502/.449
237/171
72.2%
88.1/97.3
261/288
.473/.422
238/172
72.3%
88.5/97.8
262/290
.445/.398
177/138
78.3%
-
.375/.303
 
 
Alfa 2     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 Average
'72 2.0lN/A44mm/40mmN/A48/42
87.5%
-93/78
83.9%
39.5/40
117/119
.585/.54
-131/97
74%
55.6/49.8
165/148
.55/.448
-150/100
66.7%
63.6/51.3
189/152
.472/.346
153/99
64.7%
64.9/50.8
192/151
.428/.305
158/97
61.4%
67/49.8
199/148
.398/.269
-122/85.5
70%
-
.351/.319
'72 2.0l +1mm ValvesN/A45mm/41mmN/A53/49
92.5%
-110/79
71.8%
44.6/38.6
132/114
.677/.534
-143/98
68.5%
58/47.9
172/142
.587/.441
-165/104
63%
66.9/50.8
198/151
.508/.351
171/104
60.8%
69.4/50.8
206/151
.468/.312
176/104
59.1%
71.4/50.8
212/151
.433/.281
-136/89.7
65.8%
-
.359/.327


AMC     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
AMC Stone Stock 304 Ken Parkman IronN/A1.787/1.406
3.75
No Pipe
N/A65/38
58.5%
127/74
58.3%
156/100
64.1%
62.2/64.4
184/191
.634/.517
168/116
69%
67/74.7
198/221
.512/.45
176/125
71%
70.2/80.5
208/239
.429/.388
184/130
70.7%
73.4/83.7
217/248
.374/.336
194/133
68.6%
77.4/85.7
229/254
.338/.295
-168/113
67.5%
-
.362/.285
AMC 517 '70 Ken Parkman IronN/A1.79/-
3.82
N/A69/-125/-154/-
61.2
181
.625
166/-
66
195
.505
173/-
68.7
204
.421
182/-
72.3
214
.369
189/-
75.1
223
.329
-165
-
-
.362
AMC 090 '73 Ken Parkman SF110 IronN/A2.025/1.6255874/56
75.7%
156/112
71.8%
201/141
70.1%
62.4/68
185/201
.721/.631
219/149
68%
68/71.8
201/213
.589/.50
226/149
65.9%
70.2/71.8
208/213
.487/.40
232/150
64.7%
72/72.3
213/214
.416/.335
238/151
63.4%
73.9/72.8
219/216
.366/.289
-212/142
67%
-
.410/.329
AMC 090 74Bubblefender IronN/A2.025/1.625N/A74/56
75.7%
156/112
71.8%
201/141
70.1%
62.4/68
185/201
.721/.631
219/145
66.2%
68/69.9
201/207
.589/.486
226/149
65.9%
70.2/71.8
208/213
.487/.40
232/150
64.7%
72/72.3
213/214
.416/.335
--207/139
67.4%
-
.410/.329
AMC 090 Ported 74Bubblefender IronN/A2.025/1.625N/A85/53
62.4%
160/103
64.4%
210/142
67.6%
65.2/68.5
193/203
.754/.635
225/163
72.4%
69.9/78.6
207/233
.606/.547
230/169
73.5%
71.4/81.5
212/241
.495/.453
238/175
73.5%
73.9/84.4
219/250
.427/.391
--213/150
70.7%
-
.410/.329
AMC 291 Iron173/732.025/1.625N/A----225/155
68.9%
69.9/74.7
207/221
.484/.416
----
-
1.30/2.12
.410/.329
AMC 291 '70 Ken Parkman SF110 IronN/A2.025/1.625
-
No Pipe
5171/55
77.5%
127/107
84.3%
179/135
75.4%
55.6/65.1
165/193
.642/.604
209/142
67.9%
64.9/68.5
192/203
.563/.476
217/145
66.8%
67.4/69.9
200/207
.467/.389
222/145
65.3%
68.9/69.9
204/207
.398/.324
228/145
63.6%
70.8/69.9
210/207
.351/.278
-197/137
69.3%
-
.410/.329
AMC 291 Bowl Intake Ported Exhaust IronN/A2.055/1.65
-
Pipe
N/A67/50
74.6%
138/108
78.3%
193/153
79.3%
58.2/71.6
172/212
.683/.674
236/178
75.4%
71.2/83.2
211/247
.626/.588
257/220
85.6%
77.5/103
230/305
.545/.581
257/227
88.3%
77.5/106
230/315
.454/.50
257/230
89.5%
77.5/108
230/319
.39/.434
-223/186
83.4%
-
.416/.334
AMC 291-C '70 390 '71 401 74Bubblefender IronN/A2.025/1.62551-138/101
73.2%
185/137
74.1%
57.4/66.1
170/196
.664/.613
212/152
71.7%
65.8/73.3
195/217
.571/.51
214/154
72%
66.4/74.3
197/220
.461/.413
219/-
68
201
.393
--194/136
-
-
.410/.329
AMC 291-C Ported John IronN/A-
-
No Pipe
N/A90/57
63.3%
148/115
77.7%
200/147
73.5%
-
241/192
79.7%
-
273/206
75.5%
-
293/210
71.7%
-
300/211
70.3%
-
308/-
-
252/180
AMC 475 '78-'85 74Bubblefender IronN/A2.025/1.62564-142/107
75.4%
186/137
73.7%
57.8/66.1
171/196
.668/.613
204/143
70.1%
63.3/69
188/204
.549/.48
209/144
68.9%
64.9/69.4
192/206
.45/.386
214/-
66.4
197
.384
--191/133
-
-
.410/.329
AMC 502 '74-'77 74Bubblefender IronN/A2.025/1.62559.2-144/114
79.2%
188/132
70.2%
58.4/63.6
173/189
.675/.59
204/140
68.6%
63.3/67.5
188/200
.549/.47
212/144
67.9%
65.8/69.4
195/206
.456/.386
216/-
67.1
199
.388
--193/133
-
-
.410/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
AMC 502 '74 Ken Parkman SF110 IronN/A2.025/1.6256070/59
84.3%
143/113
79%
192/146
76%
59.6/70.4
177/209
.689/.653
213/150
70.4%
66.1/72.3
196/214
.573/.503
220/152
69.1%
68.3/73.3
202/217
.474/.408
228/153
67.1%
70.8/73.8
210/219
.409/.342
236/153
64.8%
73.3/73.8
217/219
.363/.293
-205/145
70.4%
-
.410/.329
AMC SS IronN/A2.08/1.66N/A-----264/-
77.7
230
.461
---
-
-
.421/.336
AMC SS 558 Ken Parkman IronN/A2.08/1.66
-
No Pipe
N/A70/57
81.4%
154/100
64.9%
206/129
62.6%
60.6/59.6
180/177
.72/.565
242/146
60.3%
71.2/67.5
211/200
.634/.479
239/152
63.6%
70.3/70.2
208/208
.501/.399
246/159
64.6%
72.4/73.5
215/218
.43/.348
248/167
67.3%
73/77.2
216/229
.371/.313
-223/142
63.9%
-
.421/.336
AMC SS 558 Ken Parkman IronN/A2.08/1.66
-
Pipe
N/A70/58
82.9%
154/107
69.5%
206/142
68.9%
60.6/65.6
180/194
.72/.622
242/161
66.5%
71.2/74.4
211/220
.634/.529
239/172
72%
70.3/79.5
208/235
.501/.452
246/181
73.6%
72.4/83.6
215/248
.43/.396
248/190
76.6%
73/87.8
216/260
.371/.356
-223/159
71.4%
-
.421/.336
AMC Iron Ported PaytonN/A2.08/1.62564------270/200
74.1%
79.5/96.4
235/286
.404/.383
--
-
-
.421/.329
Edelbrock Performer 60119, 60139 SF1020 Alum185/702.02/1.605465/52
80%
130/96
73.8%
192/127
66.1%
59.9/63.2
178/187
.691/.577
235/163
69.4%
73.3/81.1
217/240
.634/.555
258/182
70.5%
80.5/90.5
239/268
.557/.496
260/190
73.1%
81.1/94.5
240/280
.468/.431
--215/152
70.5%
1.41/2.71
.409/.324
Edelbrock Performer RPM 60109 Alum185/702.02/1.60
4.15
53----252/162
64.3%
78.6/80.6
233/239
.544/.441
----
-
1.36/2.31
.409/.324
Edelbrock Ported 74Bubblefender AlumN/A2.02/1.6054-134/106
79.1%
182/145
79.7%
56.8/72.1
168/214
.655/.659
244/176
72.1%
76.1/87.5
226/259
.658/.60
270/200
74.1%
84.3/99.5
250/295
.583/.545
274/212
77.4%
85.5/105
253/312
.493/.481
--221/168
76%
-
.409/.324
Edelbrock Ported 74Bubblefender AlumN/A2.08/1.6054-143/113
79%
202/149
73.8%
59.4/74.1
176/220
.706/.677
254/181
71.3%
74.8/90
221/267
.666/.617
278/201
72.3%
81.8/100
242/296
.583/.548
286/214
74.8%
84.2/106
249/315
.50/.486
296/-
87.1
258
.443
-243/172
-
-
.421/.324
Edelbrock Performer 401 Ported Meaux Racing SF600 AlumN/A2.02/1.60
4.00
No Pipe
N/A-130/97
74.6%
192/135
70.3%
59.9/67.1
178/199
.691/.613
241/179
74.3%
75.2/89
223/264
.65/.61
268/203
75.7%
83.6/101
248/299
.579/.553
282/213
75.5%
88/106
261/314
.507/.484
--223/165
74.3%
-
.409/.324
Indy 401SR235/1052.10/1.6561-136/101
74.3%
194/137
70.6%
56/64.1
166/190
.671/.603
237/162
68.4%
68.4/75.8
203/224
.615/.535
265/173
65.3%
76.5/80.9
227/240
.55/.457
275/177
64.4%
79.4/82.8
235/245
.476/.39
281/180
64.1%
81.1/84.2
240/249
.417/.34
-231/155
67%
1.20/1.71
.425/.334
Indy 401-SR Alum235/1052.10/1.6561-136/123
90.4%
195/159
81.5%
56.3/74.4
167/220
.675/.70
233/178
76.4%
67.3/83.2
199/247
.605/.588
259/186
71.8%
74.8/87
222/258
.538/.492
272/191
70.2%
78.5/89.3
233/265
.471/.421
272/192
70.6%
78.5/89.8
233/266
.403/.362
-228/172
75.3%
1.16/1.83
.425/.334
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
Indy 401-SR Full Porting AlumN/A2.10/1.65N/A-141/123
87.2%
204/155
76%
58.9/72.5
175/215
.706/.683
253/181
71.5%
73/84.6
216/251
.657/.598
287/207
72.1%
82.9/96.8
246/287
.596/.547
311/225
72.3%
89.8/105
266/312
.538/.496
322/237
73.6%
93/111
275/328
.478/.447
-253/188
74.3%
-
.425/.334
Indy 401-SR Ported Alfano Perfermance AlumN/A2.10/1.65N/A65/55
84.6%
139/113
81.3%
200/151
75.5%
57.7/70.6
171/209
.692/.665
250/186
74.4%
72.2/87
214/258
.649/.614
290/208
71.7%
83.7/97.3
248/288
.602/.55
313/225
71.9%
90.4/105
268/312
.542/.496
323/238
73.7%
93.3/111
276/330
.479/.449
326/250
76.7%
94.1/117
279/346
.423/.413
263/196
74.5%
-
.425/.334
Indy 401-SR Ported Garland Perfermance AlumN/A2.10/1.65N/A80/54
67.5%
160/115
71.9%
228/170
74.6%
65.8/79.5
195/236
.789/.749
283/216
76.3%
81.7/101
242/299
.735/.714
322/239
74.2%
93/112
275/331
.669/.632
340/257
75.6%
98.2/120
291/356
.588/.566
346/270
78%
99.9/126
296/374
.513/.51
349/280
80.2%
101/131
299/388
.453/.462
290/221
76.3%
-
.425/.334
Indy 401-SR Ported AlumN/A2.10/1.65N/A80/54
67.5%
160/115
71.9%
228/170
74.6%
65.8/79.5
195/236
.789/.749
283/216
76.3%
81.7/101
242/299
.735/.714
322/239
74.2%
93/112
275/331
.669/.632
341/257
75.4%
98.5/120
292/356
.59/.566
350/270
77.1%
101/126
299/374
.519/.51
358/280
78.2%
103/131
306/388
.465/.462
292/221
75.8%
-
.425/.334
Indy 401-1 Alum245/1102.19/1.8158-128/94
73.4%
185/131
70.8%
49.1/50.9
146/151
.614/.526
230/161
70%
61.1/62.6
181/185
.572/.485
268/181
67.5%
71.1/70.3
211/208
.534/.436
294/194
66%
78/75.4
231/223
.488/.389
304/202
66.4%
80.7/78.5
239/233
.432/.348
-235/161
68.3%
1.24/1.84
.443/.367
Indy 401-1 Alum245/1102.19/1.8158-139/114
82%
195/147
75.4%
51.8/57.1
153/169
.647/.59
241/172
71.4%
64/66.8
190/198
.60/.518
272/189
69.5%
72.2/73.5
214/218
.542/.455
288/197
68.4%
76.5/76.6
227/227
.478/.395
288/205
71.2%
76.5/79.7
227/236
.41/.353
-237/171
72%
1.18/1.86
.443/.367
Indy 401-1 Full Porting Alum275/1252.19/1.81N/A-147/120
81.6%
208/158
76%
55.2/61.4
164/182
.69/.634
257/186
72.4%
68.2/72.3
202/214
.64/.56
297/207
69.7%
78.8/80.4
234/238
.591/.499
329/224
68.1%
87.3/87.1
259/258
.546/.45
354/238
67.2%
94/92.5
278/274
.503/.41
-265/189
71.2%
1.29/1.90
.443/.367
Indy 401-1 CNC Alum300/1342.25/1.8169--239/175
73.2%
60.1/68
178/202
.772/.703
298/214
71.8%
74.9/83.2
222/246
.722/.644
349/254
72.8%
87.8/98.7
260/292
.676/.612
376/274
72.9%
94.6/106
280/316
.607/.55
388/285
73.5%
97.6/111
289/328
.537/.49
390/287
73.6%
98.1/112
291/330
.472/.432
340/248
73%
1.30/2.14
.456/.367
Indy 401-1 Ported RadAMX AlumN/A2.19/1.81
-
No Pipe
N/A54/60
111%
131/112
85.5%
197/153
77.7%
52.3/59.5
155/176
.654/.614
253/185
73.1%
67.2/71.9
199/213
.63/.557
299/211
70.6%
79.4/82
235/243
.595/.508
340/234
68.8%
90.3/90.9
267/269
.564/.47
360/249
69.2%
95.6/96.8
283/287
.512/.428
-/259263/191
72.4%
-
.443/.367


Audi     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .050 .100 .150 .200 .250 .300 .350 .380 .400 .450 .500 .550 .600 .650 Average
1.8l T 20 V Small Port CCHN/A26.9mm/ 29.9mmN/A-------177/171
96.6%
67/78.6
198/233
.32/.417
-------
-
-
.214/.238
1.8l T 20 V Small Port Ported CCHN/A26.9mm/ 29.9mmN/A-------238/202
84.9%
90.1/92.8
267/275
.43/.492
-------
-
-
.214/.238
1.8l T 20 V Large Port CCHN/A26.9mm/ 29.9mmN/A-------212/195
92%
80.2/89.6
238/265
.383/.475
-------
-
-
.214/.238
1.8l T 20 V Large Port Ported CCHN/A26.9mm/ 29.9mmN/A-------257/224
87.2%
97.2/103
288/305
.464/.546
-------
-
-
.214/.238
1.8l T 20V CNC HEADS UKN/A26.9mm/ 29.9mm
100mm
No Pipe
N/A53/-102/89
87.3%
142/-
53.7
159
.65
178/134
75.3%
67.4/61.6
200/182
.611/.62
205/-
77.6
230
.563
222/161
72.5%
84/74
249/219
.508/.497
231/-
87.4
259
.453
-239/176
73.6%
90.4/80.9
268/240
.41/.407
245/182
74.3%
92.7/83.6
275/248
.374/.375
----196/148
-
-
.214/.238
1.8l T 20V Ported CNC HEADS UKN/A26.9mm/ 29.9mm
100mm
No Pipe
N/A48/-96/83
86.5%
139/-
52.6
156
.636
179/146
81.6%
67.7/67.1
201/199
.614/.676
208/-
78.7
233
.571
228/193
84.6%
86.3/88.7
256/263
.522/.596
242/-
91.6
271
.474
-250/223
89.2%
94.6/102
280/304
.429/.516
256/-
96.9
287
.39
255/250
98%
96.5/115
286/340
.35/.463
---206/179
-
-
.214/.238
 
 
_Audi     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol 1mm 2mm 3mm 4mm 5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 13mm 14mm Average
S2 2.2l 20V Stock NPSN/A32mm/ 28mm
82mm
No Pipe
N/A-56/49
87.5%
-107/94
87.9%
42.9/49.2
127/146
.588/.59
-156/119
76.3%
62.6/62.3
185/185
.571/.498
-181/125
69.1%
72.6/65.5
215/194
.497/.392
-191/128
67%
76.6/67.1
227/199
.42/.322
-193/130
67.4%
77.4/68.1
229/202
.353/.272
--147/108
73%
-
.255/.223
A7 2.3l MORGO SystemsN/A32mm/ 29.5mm
-
Pipe
N/A35/25
71.4%
61/49
80.3%
81/71
87.7%
32.5/33.5
96.3/99.3
.593/.564
106/91
85.8%
42.5/42.9
126/127
.582/.542
134/115
85.8%
53.7/54.3
159/161
.589/.548
157/128
81.5%
63/60.4
187/179
.575/.509
175/131
74.9%
70.2/61.8
208/183
.549/.446
185/135
73%
74.2/63.7
220/189
.508/.402
193/138
71.5%
77.4/65.1
229/193
.471/.366
199/140
70.4%
79.8/66.1
236/196
.437/.334
202/142
70.3%
81/67
240/199
.404/.308
203/143
70.4%
81.4/67.5
241/200
.372/.284
206/145
70.4%
82.6/68.4
245/203
.348/.266
-159/119
75.1%
-
.255/.235
A7 2.3l Ported MORGO SystemsN/A32mm/ 29.5mm
-
Pipe
N/A33/32
97%
64/67
104%
94/94
100%
37.7/44.4
112/131
.689/.747
125/115
92%
50.1/54.3
149/161
.687/.685
154/131
85.1%
61.8/61.8
183/183
.677/.625
180/147
81.7%
72.2/69.4
214/206
.659/.584
197/157
79.7%
79/74.1
234/220
.619/.535
211/166
78.7%
84.6/78.3
251/232
.58/.495
223/170
76.2%
89.4/80.2
265/238
.545/.45
239/176
73.6%
95.9/83.1
284/246
.525/.42
240/180
75%
96.3/85
285/252
.48/.39
246/182
74%
98.7/85.9
292/255
.451/.362
250/185
74%
100/87.3
297/259
.423/.339
-185/148
79.6%
-
.255/.235
2.5l Wv T4 MORGO SystemsN/AStock
-
Pipe
N/A32/-49/-67/-
-
83/-
-
100/-
-
109/-
-
117/-
-
125/-
-
130/-
-
134/-
-
139/-
-
143/-
-
146/-
-
-112
2.5l Wv T4 Ported MORGO SystemsN/AStock
-
Pipe
N/A33/-54/-74/-
-
93/-
-
110/-
-
124/-
-
135/-
-
140/-
-
146/-
-
150/-
-
157/-
-
163/-
-
166/-
-
-126
2.5l V6 MORGO SystemsN/A27mm/ 24mm
-
Pipe
N/A28/24
85.7%
54/50
92.6%
78/74
94.9%
43.9/52.8
130/156
.677/.723
100/95
95%
56.3/67.7
167/201
.651/.696
116/106
91.4%
65.4/75.6
194/224
.604/.621
120/110
91.7%
67.6/78.4
200/232
.521/.537
126/111
88.1%
71/79.1
210/235
.469/.465
128/112
87.5%
72.1/79.9
214/237
.417/.41
128/113
88.3%
72.1/80.6
214/239
.37/.368
129/113
87.6%
72.7/80.6
215/239
.336/.331
131/113
86.3%
73.8/80.6
219/239
.31/.301
133/114
85.7%
74.9/81.3
222/241
.289/.278
135/114
84.4%
76.1/81.3
225/241
.27/.257
-115/102
88.9%
-
.215/.191
2.5l V6 Ported MORGO SystemsN/A27mm/ 24mm
-
Pipe
N/A-/27-/53-79-/106-/123-/131-/132-/134-/135-/136-/136-/137-/137--
-
-
.215/.191
4.2l V8 MORGO SystemsN/AStock
-
Pipe
N/A32/-58/-80/-
-
104/-
-
129/-
-
149/-
-
166/-
-
180/-
-
191/-
-
199/-
-
202/-
-
202/-
-
203/-
-
-155
4.2l V8 Ported MORGO SystemsN/AStock
-
Pipe
N/A32/-61/-90/-
-
119/-
-
148/-
-
172/-
-
189/-
-
198/-
-
208-215/-
.050%
-

.050%
-
222/-
-
226/-
-
229/-
-
-164/.050


BMW     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .050 .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 .700 Average
Mini A Series Sabre HeadsN/A33.2mm/ 29.4mm
-
No Pipe
N/A19/16
84.2%
38/33
86.8%
56/45
80.4%
41.7/42.8
124/127
.623/.565
72/53
73.6%
53.7/50.4
159/149
.60/.499
82/58
70.7%
61.1/55.1
181/163
.547/.437
89/63
70.8%
66.3/59.9
197/177
.495/.396
95/67
70.5%
70.8/63.7
210/189
.453/.361
101/69
68.3%
75.3/65.6
223/194
.421/.325
102/72
70.6%
76/68.4
225/203
.378/.301
----79.4/57.5
72.4%
-
.265/.234
Mini A Series Ported Sabre Heads Offset GuidesN/A36.7mm/ 32mm
-
No Pipe
N/A22/18
81.8%
46/38
82.6%
66/65
98.5%
40.3/52.1
119/154
.664/.75
78/68
87.2%
47.6/54.5
141/162
.588/.588
100/78
78%
61/62.6
181/185
.604/.54
110/88
80%
67.1/70.6
199/209
.553/.508
116/95
81.9%
70.7/76.2
210/226
.50/.47
121/104
86%
73.8/83.4
219/247
.456/.45
121/108
89.3%
73.8/86.6
219/257
.406/.415
123/110
89.4%
75/88.2
222/261
.371/.381
---97.9/83.8
85.6%
-
.293/.255
M5 CNC Heads UKN/A1.374/1.198
100mm
Pipe
N/A42/-86/74
86%
133/-
44.8
133
.703
182/150
82.4%
61.4/66.5
182/197
.722/.682
221/-
74.5
221
.701
245/177
72.2%
82.6/78.5
245/233
.648/.537
255/-
86
255
.578
262/185
70.6%
88.4/82.1
262/243
.52/.421
268/-
90.4
268
.473
271/189
69.7%
91.4/83.8
271/248
.43/.344
---214/155
-
-
.278/.243
M5 Ported CNC Heads UKN/A1.374/1.198
100mm
Pipe
N/A42/-89/73
82%
134/-
45.2
134
.709
175/159
90.9%
59/70.5
175/209
.694/.723
212/-
71.5
212
.673
239/193
80.8%
80.6/85.6
239/254
.632/.585
263/-
88.7
263
.596
278/208
74.8%
93.7/92.3
278/273
.551/.473
288/-
97.1
288
.508
292/208
71.2%
98.5/92.3
292/273
.463/.379
295/-
99.5
295
.426
--227/168
-
-
.278/.243
EVO 3N/A37mm/ 32mmN/A-92/77
83.7%
-185/165
89.2%
55.5/66.2
164/196
.692/.714
-248/213
85.9%
74.4/85.4
220/253
.619/.614
-264/225
85.2%
79.2/90.2
235/267
.494/.487
268/228
85.1%
80.4/91.4
238/271
.446/.438
273/231
84.6%
81.9/92.7
243/275
.409/.40
---222/190
85.6%
-
.295/.255
Mini Cooper S CHR Motorsports LLC Home Made BenchN/A30.25mm/ 23.25mm
-
Radius on Exhaust
N/A33/31
93.9%
66/51
77.3%
98/77
78.6%
44/58.5
130/173
.598/.611
127/98
77.2%
57/74.5
169/221
.581/.584
153/106
69.3%
68.7/80.5
203/239
.56/.505
169/111
65.7%
75.9/84.3
225/250
.516/.441
174/113
64.9%
78.1/85.9
231/254
.455/.384
176/115
65.3%
79/87.4
234/259
.403/.342
175/116
66.3%
78.5/88.1
233/261
.356/.307
----142/98.4
69.2%
-
.241/.185
Mini Cooper S CHR Motorsports LLC Home Made BenchN/A31.25mm/ 24.25mm
-
Radius on Exhaust
N/A-83/45
54.2%
-136/107
78.7%
57.2/74.7
169/221
.603/.611
160/120
75%
67.3/83.8
199/248
.567/.548
179/127
70.9%
75.3/88.7
223/263
.529/.483
182/130
71.4%
76.5/90.8
227/269
.461/.424
191/132
69.1%
80.3/92.2
238/273
.423/.377
193/133
68.9%
81.2/92.9
241/275
.38/.337
----161/113
70.6%
-
.249/.193
Mini Cooper S Ported CHR Motorsports LLC Home Made BenchN/A31.25mm/ 24.25mm
-
Radius on Exhaust
N/A55/35
63.6%
111/69
62.2%
144/102
70.8%
60.6/71.2
179/211
.851/.776
173/129
74.6%
72.8/90.1
216/267
.766/.736
200/149
74.5%
84.1/104
249/308
.709/.681
213/164
77%
89.6/115
265/339
.629/.624
221/172
77.8%
92.9/120
275/356
.559/.561
232/173
74.6%
97.6/121
289/358
.514/.494
236/174
73.7%
99.3/122
294/360
.465/.441
----191/142
74%
-
.249/.193
Mini Cooper S Ported CHR Motorsports LLC Home Made BenchN/A31.25mm/ 24.5mm
-
Radius on Exhaust
N/A55/42
76.4%
111/80
72.1%
144/123
85.4%
60.6/84.2
179/249
.851/.927
173/151
87.3%
72.8/103
216/306
.766/.853
200/161
80.5%
84.1/110
249/326
.709/.728
213/165
77.5%
89.6/113
265/335
.629/.622
221/170
76.9%
92.9/116
275/345
.559/.549
232/172
74.1%
97.6/118
289/349
.514/.486
236/173
73.3%
99.3/118
294/351
.465/.434
----191/149
78.1%
-
.249/.195
Mini Cooper S MadnessN/A30.25mm/ 23.25mmN/A32/30
93.8%
69/69
100%
103/93
90.3%
46.2/70.7
137/209
.629/.738
136/104
76.5%
61/79
181/234
.622/.619
163/108
66.3%
73.2/82.1
217/243
.597/.514
178/110
61.8%
79.9/83.6
237/248
.543/.437
178/111
62.4%
79.9/84.3
237/250
.466/.378
179/111
62%
80.3/84.3
238/250
.41/.33
-----144/101
70.2%
-
.241/.185
Mini Cooper S Ported Madness Stage 1N/A30.25mm/ 24.5mmN/A38/37
97.4%
75/70
93.3%
109/107
98.2%
48.9/73.2
145/217
.665/.806
143/134
93.7%
64.2/91.7
190/272
.654/.757
175/142
81.1%
78.5/97.2
233/288
.641/.642
198/144
72.7%
88.9/98.5
263/292
.604/.542
211/145
68.7%
94.7/99.2
281/294
.552/.468
217/145
66.8%
97.4/99.2
289/294
.497/.41
-----161/127
78.6%
-
.241/.195
Mini Cooper S Ported Madness Stage 2N/A31.5mm/ 24.5mmN/A36/32
88.9%
73/61
83.6%
110/91
82.7%
45.5/62.3
135/184
.645/.686
145/122
84.1%
60/83.5
178/247
.637/.689
178/152
85.4%
73.7/104
218/308
.626/.687
213/161
75.6%
88.2/110
261/326
.624/.607
224/164
73.2%
92.7/112
275/332
.563/.53
230/165
71.7%
95.2/113
282/335
.505/.466
-----168/131
78.1%
-
.251/.195
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .050 .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 .700 Average
Mini Cooper S '01-06 M2 Race Systems98/5430.2mm/ 23.25mm
3.285
3237/26
70.3%
71/61
85.9%
103/86
83.5%
46.4/65.3
137/194
.63/.683
136/98
72.1%
61.2/74.5
181/221
.623/.584
165/102
61.8%
74.3/77.5
220/230
.605/.486
182/104
57.1%
82/79
243/234
.556/.413
184/105
57.1%
82.9/79.8
246/236
.482/.357
185/105
56.8%
83.3/79.8
247/236
.424/.313
-----147/94.4
64.4%
1.89/1.94
.241/.185
Mini Cooper S '01-06 CNC M2 Race Systems114/6930.2mm/ 23.25mm
3.285
3238/27
71.1%
75/58
77.3%
112/86
76.8%
50.4/65.3
149/194
.685/.683
146/111
76%
65.7/84.3
195/250
.669/.661
173/140
80.9%
77.9/106
231/315
.634/.667
192/158
82.3%
86.5/120
256/356
.587/.627
209/172
82.3%
94.1/131
279/387
.547/.585
221/175
79.2%
99.5/133
295/394
.507/.521
230/176
76.5%
104/134
307/396
.469/.466
----170/135
79.2%
2.02/2.55
.241/.185
Mini Cooper S '01-06 CNC M2 Race Systems 1mmOS Valves114/6931.2mm/ 24.25mm
3.285
3241/28
68.3%
80/64
80%
118/99
83.9%
49.8/69.1
148/205
.698/.754
155/126
81.3%
65.4/88
194/261
.688/.719
180/150
83.3%
75.9/105
225/310
.639/.685
196/162
82.7%
82.7/113
245/335
.58/.617
210/172
81.9%
88.6/120
263/356
.532/.561
224/176
78.6%
94.5/123
280/364
.497/.502
234/177
75.6%
98.7/124
293/366
.461/.449
----175/141
80.6%
2.05/2.57
.249/.193
Mini Cooper S Ported Cosworth Stage 1N/A31.25mm/ 24.25N/A35/30
85.7%
74/54
73%
107/81
75.7%
45/56.6
133/168
.632/.617
138/102
73.9%
58/71.2
172/211
.611/.582
165/118
71.5%
69.4/82.4
206/244
.585/.539
186/128
68.8%
78.2/89.4
232/265
.549/.487
201/134
66.7%
84.5/93.6
250/277
.509/.437
210/137
65.2%
88.3/95.7
262/284
.465/.391
-----154/108
69.8%
-
.249/.193
Mini Cooper S Ported JCWN/A-N/A34/29
85.3%
72/58
80.6%
105/86
81.9%
-
137/117
85.4%
-
165/124
75.2%
-
182/128
70.3%
-
189/129
68.3%
-
186/130
69.9%
-
-----148/110
74.5%
Mini SOHC Sabre HeadsN/A30.2mm/ 23.3mm
77mm
No Pipe
N/A34/26
76.5%
70/56
80%
107/79
73.8%
48.2/59.8
143/177
.654/.626
140/98
70%
63/74.1
187/220
.642/.582
166/105
63.3%
74.8/79.4
221/235
.609/.499
180/108
60%
81.1/81.7
240/242
.55/.428
181/108
59.7%
81.5/81.7
242/242
.474/.367
186/108
58.1%
83.8/81.7
248/242
.426/.321
188/109
58%
84.7/82.5
251/244
.383/.288
188/109
58%
84.7/82.5
251/244
.345/.259
---156/97.8
62.6%
-
.241/.186
Mini SOHC Ported Sabre HeadsN/A30.2mm/ 23.3mm
77mm
No Pipe
N/A35/27
77.1%
70/66
94.3%
105/106
101%
47.3/80.2
140/238
.642/.84
139/126
90.6%
62.6/95.3
185/282
.637/.749
170/129
75.9%
76.6/97.6
227/289
.623/.613
190/131
68.9%
85.6/99.1
254/294
.581/.519
200/132
66%
90.1/99.9
267/296
.524/.448
205/132
64.4%
92.3/99.9
274/296
.47/.392
210/133
63.3%
94.6/101
280/298
.428/.351
212/134
63.2%
95.5/101
283/300
.389/.318
---167/121
72.6%
-
.241/.186
Mini CNC Heads UKN/A30.2mm/ 23.33mm
100mm
No Pipe
N/A35/-71/56
78.9%
105/-
47.3
140
.642
142/100
70.4%
63.9/75.5
189/224
.651/.593
171/-
77
228
.627
189/109
57.7%
85.1/82.3
252/244
.578/.431
193/-
86.9
258
.506
196/110
56.1%
88.3/83
262/246
.449/.326
197/-
88.7
263
.401
-/110---158/93.8
-
-
.241/.186
Mini Ported CNC Heads UKN/A30.2mm/ 23.33mm
100mm
No Pipe
N/A36/-72/66
91.7%
107/-
48.2
143
.654
145/148
102%
65.3/112
193/331
.665/.878
176/-
79.3
235
.645
200/170
85%
90.1/128
267/380
.611/.673
215/-
96.8
287
.563
225/174
77.3%
101/131
300/389
.516/.516
230/-
104
307
.469
233/174
74.7%
105/131
311/389
.427/.413
---178/146
-
-
.241/.186
M20 325 1705885 DiggerN/A42mm/36mmN/A-55/44
80%
-110/89
80.9%
51.2/56.4
152/167
.725/.685
-155/115
74.2%
72.2/72.9
214/216
.681/.59
-181/124
68.5%
84.3/78.6
250/233
.597/.477
-181/127
70.2%
84.3/80.5
250/239
.477/.391
-186/127
68.3%
86.6/80.5
257/239
.409/.326
188/127
67.6%
87.5/80.5
259/239
.354/.279
151/108
71.3%
-
.335/.287
Alpina 1705885 DiggerN/A42mm/36mmN/A-53/39
73.6%
-106/86
81.1%
49.4/54.5
146/162
.699/.661
-151/124
82.1%
70.3/78.6
208/233
.664/.636
-183/139
76%
85.2/88.1
252/261
.603/.535
-190/145
76.3%
88.5/91.9
262/272
.501/.446
-191/154
80.6%
88.9/97.6
264/289
.42/.395
195/156
80%
90.8/98.9
269/293
.367/.343
153/120
78.9%
-
.335/.287
 
 
_BMW     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol 2mm 4mm 6mm 8mm 10mm 12mm 14mm 16mm 18mm 20mm 22mm Average
M20B25_885 Ported /Andre' NorrbackN/A42mm/36mm
85mm
No Pipe
N/A42/31
73.8%
82/61
74.4%
119/84
70.6%
55.4/53.2
164/158
.664/.547
154/103
66.9%
71.7/65.3
212/193
.645/.503
170/112
65.9%
79.2/71
235/210
.569/.438
177/119
67.2%
82.4/75.4
244/223
.494/.387
181/122
67.4%
84.3/77.3
250/229
.433/.34
184/-
85.7
254
.385
---152/100
-
-
.335/.287
M20B25 AMC Ported /Andre' NorrbackN/A42mm/35mm
86mm
No Pipe
N/A48/36
75%
86/68
79.1%
115/100
87%
53.6/67.1
159/199
.642/.67
138/107
77.5%
64.3/71.8
190/213
.578/.538
156/117
75%
72.6/78.5
215/232
.522/.47
159/120
75.5%
74/80.5
219/238
.444/.402
161/120
74.5%
75/80.5
222/238
.385/.344
161/120
74.5%
75/80.5
222/238
.337/.301
---139/107
77%
-
.335/.279
M20 325i Ported NPSN/A41.95mm/ 35.9mm
83mm
No Pipe
N/A40/33
82.5%
82/64
78%
122/89
73%
56.9/56.7
169/168
.682/.581
153/106
69.3%
71.4/67.6
212/200
.641/.519
168/116
69%
78.4/73.9
232/219
.563/.454
173/121
69.9%
80.8/77.1
239/229
.483/.395
173/124
71.7%
80.8/79
239/234
.414/.347
----145/103
71.2%
-
.334/.286
M52B20 Roadster Ported /Andre' NorrbackN/A30mm/27mm
85mm
No Pipe
N/A55/51
92.7%
112/98
87.5%
162/122
75.3%
73.9/68.7
219/204
.633/.53
186/138
74.2%
84.9/77.7
252/230
.545/.449
189/148
78.3%
86.3/83.4
256/247
.443/.386
190/152
80%
86.7/85.6
257/254
.371/.33
-----168/132
78.4%
-
.239/.215
M20 323i 1264200 Marquis RexN/A40mm/34mmN/A33/-69/-101/-
51.9
154
.592
117/-
60.1
178
.514
119/-
61.1
181
.418
123/-
63.1
187
.36
-----106
-
-
.319/.271
M20 323i 1277731 Marquis RexN/A40mm/34mmN/A32/-68/-105/-
53.9
160
.615
129/-
66.2
196
.567
136/-
69.8
207
.478
141/-
72.4
214
.413
-----116
-
-
.319/.271
M20 325i 1705885 Marquis RexN/A42mm/36mmN/A36/-78/-112/-
52.2
155
.625
135/-
62.9
186
.565
158/-
73.6
218
.529
175/-
81.5
241
.488
-----132
-
-
.335/.287


Buick     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
Buick 320 Stright 8 Stock NPS IronN/A1.77/1.45
3.543
No Pipe
N/A50/43
86%
101/83
82.2%
128/93
72.7%
52/56.3
154/167
.526/.466
134/96
71.6%
54.5/58.1
161/172
.413/.361
----121/90.7
74.9%
-
.358/.294
Buick 215 V8 AlumN/A1.525/1.35N/A---128/81
63.3%
70.1/56.6
208/168
.457/.327
-----
-
-
.309/.273
Buick 300 V8 AlumN/A1.625/1.312N/A-105/96
91.4%
135/108
80%
65.1/79.9
193/237
.604/.598
142/115
81%
68.5/85.1
203/252
.476/.478
149/115
77.2%
71.8/85.1
213/252
.40/.382
154/116
75.3%
74.3/85.8
220/254
.344/.321
--137/110
80.3%
-
.329/.266
Buick 300 V8 Ported AlumN/A1.775/1.50
-
No Pipe
N/A66/47
71.2%
129/104
80.6%
174/130
74.7%
70.3/73.6
208/218
.712/.63
191/146
76.4%
77.2/82.6
229/245
.587/.531
196/152
77.6%
79.2/86
235/255
.481/.442
---173/133
77.1%
-
.359/.304
Buick 300 V8 Ported Peak Performance AlumN/A1.625/1.312N/A-151/108
71.5%
159/123
77.4%
76.7/91
227/270
.711/.681
160/129
80.6%
77.1/95.4
229/283
.537/.536
----157/120
76.6%
-
.329/.266
Buick 340 V8 DynoDave IronN/A1.81/1.37N/A54/38
70.4%
112/75
67%
153/99
64.7%
59.5/67.2
176/199
.614/.525
172/102
59.3%
66.8/69.2
198/205
.518/.406
175/104
59.4%
68/70.6
202/209
.422/.331
---153/95.0
62.1%
-
.367/.277
Buick 340 1376330 NPS IronN/A1.81/1.39N/A49/40
81.6%
102/80
78.4%
143/97
67.8%
55.6/63.9
165/189
.574/.507
156/102
65.4%
60.6/67.2
180/199
.47/.40
160/104
65%
62.2/68.5
184/203
.385/.326
160/-
62.2
184
.321
--144/95.8
-
-
.367/.281
Buick 340 1376330 VJ Bowls Port Cleanup NPS IronN/A1.81/1.39N/A57/44
77.2%
110/82
74.5%
155/104
67.1%
60.2/68.5
178/203
.622/.544
185/118
63.8%
71.9/77.8
213/230
.557/.463
185/130
70.3%
71.9/85.7
213/254
.446/.408
195/136
69.7%
75.8/89.6
225/266
.391/.356
--166/114
68.7%
-
.367/.281
Buick Nailhead Stock IronN/A1.875/1.437
4.00
No Pipe
12463/41
65.1%
110/81
73.6%
146/101
69.2%
52.9/62.3
157/185
.566/.511
183/107
58.5%
66.3/66
196/195
.532/.406
188/111
59%
68.1/68.4
202/203
.437/.337
---157/100
63.8%
-
.380/.291
Buick Nailhead '57 889 Mild Ported RnD Engineering I-30 E-30 Back Cut IronN/A1.875/1.437
4.00
No Pipe
12464/47
73.4%
126/76
60.3%
169/99
58.6%
61.2/61
181/181
.655/.501
196/111
56.6%
71/68.4
210/203
.57/.421
196/116
59.2%
71/71.5
210/212
.456/.352
---172/101
58.5%
-
.380/.291
Buick Nailhead '66 401 Stock Babeola IronN/A1.87/1.5012453/47
88.7%
110/78
70.9%
157/103
65.6%
57.2/58.3
169/173
.61/.499
180/117
65%
65.5/66.2
194/196
.525/.425
190/120
63.2%
69.2/67.9
205/201
.443/.349
196/123
62.8%
71.4/69.6
211/206
.381/.298
--167/108
64.9%
-
.379/.304
Buick Nailhead 401 Ported Gessler IronN/A1.875/1.50N/A62/48
77.4%
127/83
65.4%
171/108
63.2%
61.9/61.1
183/181
.663/.523
197/130
66%
71.3/73.6
211/218
.573/.472
212/138
65.1%
76.8/78.1
227/231
.493/.401
219/141
64.4%
79.3/79.8
235/236
.424/.342
--185/120
64.8%
-
.380/.304
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
Buick GN IronN/A1.71/1.50N/A----156/110
70.5%
67.9/62.2
201/184
.398/.32
----
-
-
.346/.304
Buick GN IronN/A1.71/1.50N/A52/45
86.5%
108/84
77.8%
149/101
67.8%
64.9/57.2
192/169
.633/.489
152/108
71.1%
66.2/61.1
196/181
.484/.392
155/111
71.6%
67.5/62.8
200/186
.395/.323
---141/101
71.6%
-
.346/.304
Buick GN IronN/A1.71/1.50N/A54/50
92.6%
111/96
86.5%
161/131
81.4%
70.1/74.1
208/220
.684/.635
177/136
76.8%
77.1/77
228/228
.564/.494
178/136
76.4%
77.5/77
230/228
.454/.395
---157/125
79.6%
-
.346/.304
Buick GN Ported IronN/A1.77/1.50N/A---196/157
80.1%
79.7/88.8
236/263
.604/.57
-----
-
-
.358/.304
Buick GN Ported IronN/A1.77/1.50N/A59/49
83.1%
127/98
77.2%
175/142
81.1%
71.1/80.4
211/238
.719/.688
193/154
79.8%
78.4/87.1
232/258
.594/.56
202/156
77.2%
82.1/88.3
243/262
.498/.453
---174/138
78.9%
-
.358/.304
Buick GN Ported VPE IronN/A-N/A---206/173
84%
-
217/181
83.4%
-
221/184
83.3%
-
--215/179
83.5%
Buick GN Ported VPE Stage 3 IronN/A-N/A---205/174
84.9%
-
218/184
84.4%
-
223/184
82.5%
-
--215/181
83.9%
Buick GN1 Mild Ported SF600N/A1.77/1.50
3.875
N/A62/51
82.3%
128/106
82.8%
182/139
76.4%
74/78.7
219/233
.747/.673
216/164
75.9%
87.8/92.8
260/275
.665/.596
228/172
75.4%
92.7/97.3
275/288
.562/.50
228/177
77.6%
92.7/100
275/297
.468/.429
--196/152
77.2%
-
.358/.304
Buick GN1 PortedN/A1.77/1.50N/A64/52
81.3%
143/115
80.4%
206/149
72.3%
83.7/84.3
248/250
.846/.722
237/181
76.4%
96.3/102
285/303
.73/.658
244/197
80.7%
99.2/111
294/330
.601/.573
---208/161
77.3%
-
.358/.304
TA Performance Street Intimidator156/721.94/1.60
4.00
No Pipe
4659/61
103%
118/107
90.7%
167/143
85.6%
56.5/71.1
167/211
.626/.65
210/162
77.1%
71/80.6
211/239
.59/.552
210/177
84.3%
71/88
211/261
.472/.482
213/180
84.5%
72.1/89.5
214/265
.399/.409
--184/154
83.8%
1.37/2.50
.393/.324
TA Performance Street Eliminator163/731.94/1.6046/5559/42
71.2%
108/87
80.6%
156/121
77.6%
52.8/60.2
156/178
.584/.55
184/135
73.4%
62.2/67.1
184/199
.517/.46
195/144
73.8%
66/71.6
195/212
.438/.392
204/145
71.1%
69/72.1
204/214
.382/.329
--169/126
74.6%
1.25/1.99
.393/.324
TA Performance Street Eliminator Ported163/731.94/1.60N/A87/49
56.3%
150/100
66.7%
204/139
68.1%
69/69.1
204/205
.764/.631
235/184
78.3%
79.5/91.5
236/271
.66/.627
263/195
74.1%
89/97
264/287
.591/.531
266/204
76.7%
90/101
267/301
.498/.463
--224/164
73.5%
1.63/2.79
.393/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
Buick V6 Stage II Ported Chapman247/-2.10/1.62540.568/53
77.9%
145/113
77.9%
221/174
78.7%
63.8/83.9
189/249
.765/.778
281/213
75.8%
81.1/103
240/304
.729/.714
321/229
71.3%
92.7/110
275/327
.667/.614
336/241
71.7%
97/116
287/344
.581/.539
341/247
72.4%
98.5/119
292/353
.506/.473
-274/203
74%
1.38
.425/.329
Buick TA Ported to Stage I IronN/A2.13/1.75N/A66/57
86.4%
133/109
82%
188/133
70.7%
52.8/55.3
156/164
.641/.552
226/147
65%
63.4/61.1
188/181
.578/.458
236/159
67.4%
66.2/66.1
196/196
.483/.396
234/159
67.9%
65.7/66.1
195/196
.399/.33
233/162
69.5%
65.4/67.4
194/200
.341/.288
-208/145
69.5%
-
.431/.354
Buick 455 '73 860 Ported Smithberg Racing IronN/A2.125/1.75
4.31
No Pipe
N/A75/67
89.3%
157/115
73.2%
222/149
67.1%
62.6/61.9
185/184
.759/.619
268/170
63.4%
75.6/70.7
224/209
.687/.529
287/187
65.2%
80.9/77.7
240/230
.589/.466
289/193
66.8%
81.5/80.2
241/238
.494/.401
--245/163
66.6%
-
.430/.354
Buick Stage I IronN/A2.13/1.75N/A-----230/189
82.2%
64.5/78.6
191/233
.392/.392
---
-
-
.431/.354
Buick Stage I '74 Jim IronN/A2.13/1.75N/A----218/139
63.8%
61.2/57.8
181/171
.446/.346
----
-
-
.431/.354
Buick Stage I Ported IronN/A-N/A-----295/205
69.5%
-
---
Buick Stage I Ported IronN/A-N/A74/-158/-233/-
-
280/-
-
292/-
-
292/-
-
--251
Buick Stage I Ported IronN/A-N/A73/-153/-222/-
-
276/-
-
304/-
-
297/-
-
--250
Buick Stage IIN/A2.13/1.75N/A-----236/213
90.3%
66.2/88.6
196/262
.403/.442
---
-
-
.431/.354
Buick 350 Rick Crawford IronN/AStockN/A55/44
80%
112/100
89.3%
165/119
72.1%
-
199/137
68.8%
-
196/146
74.5%
-
199/149
74.9%
-
--174/130
74.7%
Buick 350 Rick Crawford Ported IronN/A1.92/1.55N/A65/66
101%
122/114
93.4%
180/150
83.3%
62.2/79.5
184/236
.681/.703
236/179
75.8%
81.5/94.9
242/281
.67/.629
260/191
73.5%
89.8/101
266/300
.59/.537
264/199
75.4%
91.2/105
270/312
.50/.467
--212/167
78.4%
-
.389/.314
Buick 455 IronN/A2.00/1.625N/A59/52
88.1%
120/100
83.3%
175/124
70.9%
55.7/59.8
165/177
.636/.555
208/140
67.3%
66.2/67.5
196/200
.567/.47
218/147
67.4%
69.4/70.9
206/210
.475/.394
---180/128
70.9%
-
.405/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
Buick 455 Iron184/1422.125/1.75N/A-----220/150
68.2%
62/62.4
184/185
.376/.311
---
-
1.20/1.06
.430/.354
Buick 455 Ported Gessler IronN/A2.125/1.75N/A71/61
85.9%
146/119
81.5%
213/145
68.1%
60.1/60.3
178/179
.728/.602
259/172
66.4%
73/71.5
216/212
.664/.536
270/187
69.3%
76.1/77.7
226/230
.554/.466
264/195
73.9%
74.4/81.1
221/240
.451/.405
--230/164
71%
-
.430/.354
Buick 430 (Stage 1 Valves) Charlie Evans IronN/A2.125/1.75N/A76/57
75%
142/97
68.3%
198/124
62.6%
55.8/51.6
165/153
.677/.515
227/142
62.6%
64/59
190/175
.582/.442
225/152
67.6%
63.4/63.2
188/187
.462/.379
227/156
68.7%
64/64.9
190/192
.388/.324
--204/134
65.8%
-
.430/.354
Buick 430 Ported Evans IronN/AStockN/A76/53
69.7%
156/106
67.9%
224/139
62.1%
-
264/166
62.9%
-
274/177
64.6%
-
269/181
67.3%
-
--237/154
64.8%
Buick Converted to Stage 1 Valves TA IronN/A2.13/1.755N/A66/57
86.4%
133/109
82%
188/133
70.7%
52.8/55
156/163
.641/.551
226/147
65%
63.4/60.8
188/180
.578/.457
236/159
67.4%
66.2/65.7
196/195
.483/.395
233/159
68.2%
65.4/65.7
194/195
.397/.329
233/162
69.5%
65.4/67
194/198
.341/.287
-208/145
69.6%
-
.431/.355
Buick 430 985 Ported TA SF600 IronN/A2.13/1.755
4.350
N/A-142/109
76.8%
202/155
76.7%
56.7/64.1
168/190
.689/.642
250/176
70.4%
70.2/72.8
208/216
.64/.547
287/199
69.3%
80.5/82.3
239/244
.588/.494
300/204
68%
84.2/84.3
249/250
.512/.422
--236/169
71.4%
-
.431/.355
Buick Ported P.A.E. IronN/A2.15/1.75
-
No Pipe
N/A78/58
74.4%
143/113
79%
213/164
77%
58.7/68.2
174/202
.72/.681
262/190
72.5%
72.2/79
214/234
.664/.592
283/207
73.1%
78/86.1
231/255
.574/.516
297/212
71.4%
81.8/88.1
242/261
.502/.44
--240/177
74%
-
.435/.354
Bulldog AlumN/A2.125/1.75N/A82/62
75.6%
144/114
79.2%
204/155
76%
57.5/64.4
170/191
.698/.644
253/184
72.7%
71.3/76.5
211/227
.649/.573
293/201
68.6%
82.6/83.6
245/248
.601/.501
303/215
71%
85.4/89.4
253/265
.518/.446
--239/174
72.6%
-
.430/.354
Bulldog CCM Alum250/-2.19/1.8166---------
-
-
.443/.367
Bulldog Ported Earick Racing AlumN/A-N/A101/-162/-234/-
-
344/-
-
349/-
-
380/-
-
--294
Edelbrock Performer RPM 60049 SF1020 Alum215/1302.125/1.756868/58
85.3%
127/108
85%
190/150
78.9%
53.6/62.4
159/185
.65/.623
241/173
71.8%
68/71.9
201/213
.618/.539
274/183
66.8%
77.3/76.1
229/225
.562/.456
273/190
69.6%
77/79
228/234
.467/.395
--221/161
72.8%
1.27/1.46
.430/.354
Edelbrock Performer RPM 60049 Mike AlumN/A2.125/1.75N/A68/55
80.9%
130/107
82.3%
194/144
74.2%
54.7/59.9
162/177
.663/.598
251/164
65.3%
70.8/68.2
210/202
.644/.511
278/172
61.9%
78.4/71.5
232/212
.57/.429
283/175
61.8%
79.8/72.8
236/216
.484/.363
281/175
62.3%
79.2/72.8
235/216
.412/.311
-236/156
66.1%
-
.430/.354
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
Edelbrock Performer RPM 60049 George AlumN/A2.125/1.75N/A66/55
83.3%
126/103
81.7%
192/139
72.4%
54.1/57.8
160/171
.657/.577
247/162
65.6%
69.6/67.4
206/200
.634/.505
279/175
62.7%
78.7/72.8
233/216
.572/.436
276/183
66.3%
77.8/76.1
231/225
.472/.38
278/185
66.5%
78.4/76.9
232/228
.407/.329
-233/158
67.7%
-
.430/.354
Edelbrock Performer RPM Ported SF600 AlumN/A2.125/1.75N/A66/59
89.4%
137/115
83.9%
206/154
74.8%
58.1/64
172/190
.705/.64
260/177
68.1%
73.3/73.6
217/218
.667/.551
296/188
63.5%
83.5/78.2
247/232
.607/.468
301/194
64.5%
84.9/80.7
251/239
.515/.403
--240/166
69%
-
.430/.354
Edelbrock Ported Gessler Level 2 AlumN/A2.125/1.75N/A68/66
97.1%
142/116
81.7%
210/155
73.8%
59.2/64.4
175/191
.718/.644
260/176
67.7%
73.3/73.2
217/217
.667/.548
294/187
63.6%
82.9/77.7
246/230
.603/.466
305/193
63.3%
86/80.2
255/238
.522/.401
--242/165
68.3%
-
.430/.354
TA Performance Ported 455 IronN/A2.13/1.75N/A-----250/180
72%
70.2/74.8
208/222
.426/.374
---
-
-
.431/.354
TA Performance Street Eliminator SF600N/A2.16/1.755N/A72/-149/-194/161
83%
52.9/66.6
157/197
.653/.667
249/190
76.3%
68/78.5
201/233
.628/.59
285/206
72.3%
77.8/85.2
230/252
.575/.512
290/211
72.8%
79.1/87.2
234/258
.488/.437
281/211
75.1%
76.7/87.2
227/258
.405/.374
-241/196
-
-
.437/.355
TA Performance Street EliminatorN/A2.26/1.755N/A70/59
84.3%
140/112
80%
194/161
83%
48.4/66.6
143/197
.624/.667
249/190
76.3%
62.1/78.5
184/233
.601/.59
285/206
72.3%
71/85.2
211/252
.55/.512
290/211
72.8%
72.3/87.2
214/258
.466/.437
281/211
75.1%
70/87.2
208/258
.387/.374
-240/182
75.8%
-
.458/.355
TA Performance Street Eliminator Stage 1 Ported263/1792.26/1.7556950/57
114%
149/122
81.9%
214/167
78%
53.3/69
158/205
.688/.692
276/197
71.4%
68.8/81.4
204/241
.666/.612
329/226
68.7%
82/93.4
243/277
.635/.562
361/237
65.7%
90/98
267/290
.58/.491
--266/190
71.4%
1.37/1.32
.458/.355
TA Performance Street Eliminator Stage 1 Ported GesslerN/A2.16/1.755N/A70/61
87.1%
144/112
77.8%
208/165
79.3%
56.8/68.2
168/202
.70/.683
266/194
72.9%
72.6/80.2
215/238
.671/.603
310/214
69%
84.6/88.5
251/262
.626/.532
328/226
68.9%
89.5/93.4
265/277
.552/.468
--251/182
72.5%
-
.437/.355
TA Performance Street Eliminator Stage 2 Kerry SF600N/A2.16/1.755
4.375
N/A72/-149/-218/-
59.5
176
.733
273/-
74.5
221
.689
298/-
81.3
241
.602
295/-
80.5
239
.496
300/-
81.9
243
.433
-256
-
-
.437/.355
TA Performance Street Eliminator Stage 2 Ported Kerry SF600N/A2.16/1.755
4.375
No Pipe
N/A75/69
92%
157/128
81.5%
238/176
73.9%
65/72.8
192/216
.801/.729
305/222
72.8%
83.2/91.8
247/272
.77/.689
347/251
72.3%
94.7/104
281/307
.70/.624
361/263
72.9%
98.5/109
292/322
.607/.545
360/265
73.6%
98.2/110
291/325
.519/.47
367/266
72.5%
100/110
297/326
.463/.413
305/224
73.6%
-
.437/.355
TA Performance Street Eliminator Stage 2 Ported Kerry SF600N/A2.16/1.755
4.375
2 1/8" Pipe
N/A75/70
93.3%
157/135
86%
238/187
78.6%
65/77.3
192/229
.801/.774
305/236
77.4%
83.2/97.6
247/289
.77/.733
347/273
78.7%
94.7/113
281/334
.70/.678
361/294
81.4%
98.5/122
292/360
.607/.609
360/304
84.4%
98.2/126
291/372
.519/.54
367/306
83.4%
100/126
297/375
.463/.475
305/248
81.3%
-
.437/.355
TA Performance TE Stage 2 Ported AlumN/A2.26/1.755
4.50
67------388/268
69.1%
96.7/111
287/328
.535/.476
--
-
-
.458/.355
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
TA Performance Stage 1 Out of Box Jim Weise AlumN/A2.13/1.75N/A66/56
84.8%
140/112
80%
203/145
71.4%
57/60.3
169/179
.693/.602
248/182
73.4%
69.6/75.7
206/224
.635/.567
269/193
71.7%
75.5/80.2
224/238
.551/.481
279/197
70.6%
78.3/81.9
232/243
.476/.409
276/200
72.5%
77.5/83.2
230/246
.404/.356
-236/172
72.7%
-
.431/.354
TA Performance Stage 1 Ported Jim Weise AlumN/A2.13/1.755N/A74/60
81.1%
152/126
82.9%
221/174
78.7%
62/71.9
184/213
.754/.721
274/205
74.8%
76.9/84.7
228/251
.701/.637
314/228
72.6%
88.1/94.3
261/279
.643/.566
314/230
73.2%
88.1/95.1
261/282
.536/.476
315/230
73%
88.4/95.1
262/282
.461/.408
-265/199
75%
-
.431/.355
TA Performance Stage 1 Base AlumN/A2.13/1.755N/A-----280/200
71.4%
78.6/82.7
233/245
.478/.414
---
-
-
.431/.355
TA Performance Stage 1 Ported AlumN/A2.13/1.755N/A-----350/205
58.6%
98.2/84.7
291/251
.597/.424
---
-
-
.431/.355
TA Performance Stage 2 AlumN/A2.13/1.75N/A-----300/240
80%
84.2/99.8
249/296
.512/.498
---
-
-
.431/.354
TA Performance Stage 2 Ported AlumN/A2.13/1.75N/A-----350/260
74.3%
98.2/108
291/320
.597/.54
---
-
-
.431/.354
TA Performance Ported AlumN/A2.125/1.75N/A-----315/230
73%
88.8/95.6
263/283
.539/.478
---
-
-
.430/.354
TA Performance Stage 3 AlumN/A2.25/1.8058-----330/255
77.3%
83/100
246/297
.533/.515
---
-
-
.456/.365
TA Performance Stage 3 Ported AlumN/A2.30/1.8058-----385/270
70.1%
92.7/106
275/314
.608/.545
---
-
-
.466/.365
TA Performance Stage 3 Ported Alum250/-2.225/1.81N/A----350/233
66.6%
90/90.6
267/268
.686/.561
360/263
73.1%
92.6/102
274/303
.588/.528
--355/248
69.9%
1.44
.451/.367
TA Performance Stage 3 Alum Ported Bruce KentN/A2.225/1.80N/A-----330/255
77.3%
84.9/100
251/297
.539/.515
385/295
76.6%
99/116
293/343
.539/.51
-358/275
76.9%
-
.451/.365
TA Performance Stage 4 AlumN/A2.25/1.8058-----325/230
70.8%
81.7/90.4
242/268
.525/.464
---
-
-
.456/.365
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 Average
TA Performance Stage 4 AlumN/A2.25/1.80N/A-----375/265
70.7%
94.3/104
279/309
.606/.535
---
-
-
.456/.365
TA Performance Stage 4 AlumN/A2.25/1.80N/A76/65
85.5%
147/129
87.8%
218/179
82.1%
54.8/70.3
162/208
.704/.723
266/222
83.5%
66.9/87.2
198/258
.644/.672
321/247
76.9%
80.7/97.1
239/288
.622/.598
362/260
71.8%
91/102
270/303
.585/.525
--263/207
78.9%
-
.456/.365
TA Performance Stage 4 Ported AlumN/A2.30/1.8058-----395/270
68.4%
95.1/106
282/314
.624/.545
---
-
-
.466/.365
TA Performance Stage 4 Ported AlumN/A2.20/-
4.40
N/A74/-154/-225/-
59.2
175
.743
281/-
73.9
219
.696
335/-
88.1
261
.664
369/-
97.1
288
.609
378/-
99.4
295
.535
-290
-
-
.446
TA Performance Stage 4 Ported AlumN/A2.26/-
4.40
N/A70/-140/-204/-
50.9
151
.656
269/-
67.1
199
.649
325/-
81
240
.627
360/-
89.7
266
.579
385/-
96
284
.531
-281
-
-
.458


Cadillac     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .650 .700 .800 .850 Average
Cadillac MTS IronN/A-N/A55/41
74.5%
96/58
60.4%
147/110
74.8%
-
195/126
64.6%
-
225/137
60.9%
-
240/143
59.6%
-
----181/115
63.6%
Cadillac Ported MTS IronN/A-N/A68/57
83.8%
137/105
76.6%
191/137
71.7%
-
243/175
72%
-
268/192
71.6%
-
285/204
71.6%
-
286/208
72.7%
-
288/210
72.9%
-
--243/176
72.5%
Cadillac 902 '69200/1451.96/-7683/73
88%
134/107
79.9%
180/140
77.8%
59.7
177
.667
215/164
76.3%
71.3
211
.598
248/181
73%
82.2
244
.552
263/191
72.6%
87.2
258
.488
-277/206
74.4%
91.8
272
.44
--220/165
75.1%
1.39/1.42
.397
Cadillac Ported Potter Automotive IronN/A2.19/1.8476-----320/240
75%
85/90.3
252/267
.531/.474
-----
-
-
.443/.373
Cadillac 185/1242.00/1.62576-119/87
73.1%
162/129
79.6%
51.6/62.2
153/184
.589/.577
214/149
69.6%
68.1/71.8
202/213
.583/.50
237/160
67.5%
75.4/77.1
224/229
.517/.429
240/162
67.5%
76.4/78.1
226/231
.436/.362
----194/137
70.7%
1.30/1.31
.405/.329
Cadillac 493 '75185/1242.00/1.62512068/67
98.5%
130/97
74.6%
190/132
69.5%
60.5/63.6
179/189
.69/.59
215/160
74.4%
68.4/77.1
203/229
.586/.537
233/172
73.8%
74.2/82.9
220/246
.508/.462
246/-
78.3
232
.447
----203/140
-
1.33/1.39
.405/.329
Cadillac 493 '75 Pocket PortedN/A2.00/1.625N/A94/80
85.1%
148/124
83.8%
186/150
80.6%
59.2/72.3
175/214
.676/.671
217/173
79.7%
69.1/83.4
205/247
.591/.58
246/183
74.4%
78.3/88.2
232/261
.536/.491
255/189
74.1%
81.2/91.1
241/270
.463/.423
----210/164
77.9%
-
.405/.329
Bulldog Performance AlumN/A-N/A71/57
80.3%
136/102
75%
171/140
81.9%
-
230/170
73.9%
-
270/193
71.5%
-
294/209
71.1%
-
296/216
73%
-
286/222
77.6%
-
--240/179
74.4%
Bulldog Performance AlumN/A2.19/1.847688/63
71.6%
146/110
75.3%
203/145
71.4%
53.9/54.5
160/162
.674/.573
242/178
73.6%
64.2/66.9
190/198
.602/.527
276/202
73.2%
73.3/76
217/225
.55/.479
296/224
75.7%
78.6/84.2
233/250
.491/.442
----233/172
73.9%
-
.443/.373
Bulldog Performance Alum260/-2.19/1.847665/61
93.8%
125/117
93.6%
178/159
89.3%
47.3/59.8
140/177
.591/.628
238/203
85.3%
63.2/76.3
187/226
.592/.601
285/219
76.8%
75.7/82.4
224/244
.567/.519
307/235
76.5%
81.5/88.4
241/262
.509/.464
-302/242
80.1%
80.2/91
238/270
.429/.41
--239/196
81.9%
1.18
.443/.373
Bulldog Performance Ported CPP AlumN/A2.19/1.7739-------360/-
95.6
283
.512
---
-
-
.443/.358
Bulldog / MTS Ported AlumN/A2.25/1.86N/A------345/268
77.7%
86.8/98.6
257/292
.514/.483
----
-
-
.456/.377
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .650 .700 .800 .850 Average
MTS AlumN/A2.19/-
4.35
N/A78/-135/-178-222/-
.050%
23.6
70.0
.295

.050%
58.9
175
.553
258/-
68.5
203
.514
274/-
72.7
216
.455
----196/.050
-
-
.443
MTS Ported AlumN/A2.19/-
4.35
N/A88/-136/-193/-
51.2
152
.64
244/-
64.8
192
.607
281/-
74.6
221
.559
318/-
84.4
250
.528
-336/-
89.2
264
.478
338/-
89.7
266
.421
-264
-
-
.443
MTS Ported Stage 3 AlumN/A2.19/1.84N/A73/63
86.3%
133/114
85.7%
192/157
81.8%
51/59
151/175
.637/.62
246/189
76.8%
65.3/71.1
194/211
.612/.56
299/215
71.9%
79.4/80.9
235/240
.595/.51
330/236
71.5%
87.6/88.8
260/263
.548/.466
-341/250
73.3%
90.5/94
268/279
.485/.423
327/258
78.9%
86.8/97
257/287
.407/.382
-267/203
76%
-
.443/.373
MTS CNC highport hand finished JC AlumN/A2.25/-
4.35
N/A80/-137/-195/-
49
145
.63
251/-
63.1
187
.608
305/-
76.7
227
.591
340/-
85.5
253
.549
359/-
90.3
268
.535
375/-
94.3
279
.519
403/-
101
300
.488
-296
-
-
.456
Cadillac Performance Parts Alum295/-2.275/1.8070-171/109
63.7%
233/149
63.9%
57.3/58.6
170/173
.744/.602
296/184
62.2%
72.8/72.3
216/214
.709/.557
345/221
64.1%
84.9/86.8
251/257
.661/.535
376/249
66.2%
92.5/97.9
274/290
.601/.503
-391/267
68.3%
96.2/105
285/311
.535/.462
398/278
69.8%
97.9/109
290/324
.477/.421
402/278
69.2%
98.9/109
293/324
.453/.396
327/217
66.4%
1.36
.461/.365
 
 
Northstar     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .050 .100 .150 .200 .250 .300 .350 .400 .450 .500 Average
4.0 CHRFABN/A33mm/29mmN/A26/30
115%
75/68
90.7%
111/94
84.7%
41.9/45.9
124/136
.621/.598
144/109
75.7%
54.3/53.2
161/158
.604/.52
171/119
69.6%
64.5/58.1
191/172
.574/.454
193/126
65.3%
72.8/61.5
216/182
.54/.401
207/131
63.3%
78.1/64
231/190
.496/.357
212/134
63.2%
80/65.4
237/194
.445/.32
215/138
64.2%
81.1/67.4
240/200
.401/.293
217/142
65.4%
81.8/69.3
242/205
.364/.271
172/118
68.7%
-
.263/.231
4.6 CHRFABN/A33mm/29mmN/A39/29
74.4%
81/67
82.7%
122/98
80.3%
46/47.9
136/142
.682/.624
157/123
78.3%
59.2/60.1
175/178
.659/.587
186/134
72%
70.2/65.4
208/194
.624/.512
208/141
67.8%
78.4/68.9
232/204
.582/.449
218/146
67%
82.2/71.3
244/211
.523/.398
219/150
68.5%
82.6/73.3
245/217
.459/.358
222/153
68.9%
83.7/74.7
248/221
.414/.325
225/154
68.4%
84.9/75.2
251/223
.378/.294
182/130
71.2%
-
.263/.231
4.6 Ported CHRFABN/A33mm/29mmN/A40/29
72.5%
83/59
71.1%
124/92
74.2%
46.8/44.9
139/133
.694/.586
159/121
76.1%
60/59.1
178/175
.667/.578
190/137
72.1%
71.7/66.9
212/198
.638/.523
218/150
68.8%
82.2/73.3
244/217
.61/.477
239/160
66.9%
90.1/78.1
267/232
.573/.436
255/176
69%
96.2/86
285/255
.535/.42
266/183
68.8%
100/89.4
297/265
.496/.388
273/187
68.5%
103/91.3
305/271
.458/.357
201/141
70%
-
.263/.231


Chevy     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy Bow Tie171/-2.02/1.60N/A----212/145
68.4%
66.2/72.1
196/214
.458/.395
211/147
69.7%
65.8/73.1
195/217
.38/.334
----212/146
69%
1.24
.409/.324
Chevy Bow Tie178/--N/A-----221/138
62.4%
-
-----
-
1.24
Chevy Bow Tie 034 Meaux Racing Out of Box SF600 IronN/A2.02/1.60
4.00
Pipe
N/A-119/108
90.8%
171/140
81.9%
53.4/69.6
158/206
.615/.636
206/146
70.9%
64.3/72.6
190/215
.556/.497
230/147
63.9%
71.8/73.1
213/217
.496/.401
217/149
68.7%
67.7/74.1
201/220
.39/.338
219/149
68%
68.3/74.1
202/220
.338/.29
---194/140
72.2%
-
.409/.324
Chevy Bow Tie 034 Ported Meaux Racing SF600 Iron223/-2.085/1.585
4.00
No Pipe
N/A-134/107
79.9%
195/150
76.9%
57.1/76
169/225
.68/.688
241/201
83.4%
70.6/102
209/302
.63/.691
275/216
78.5%
80.5/109
239/324
.575/.594
293/222
75.8%
85.8/113
254/333
.511/.509
303/224
73.9%
88.7/114
263/336
.453/.44
311/224
72%
91.1/114
270/336
.407/.385
317/225
71%
92.8/114
275/338
.368/.344
-259/196
75.8%
1.42
.422/.321
Chevy Bow Tie 034 Ported Meaux Racing Larger Bore SF600 Iron223/-2.085/1.585
4.125
N/A-138/107
77.5%
199/150
75.4%
58.3/76
173/225
.694/.688
246/201
81.7%
72/102
213/302
.643/.691
279/216
77.4%
81.7/109
242/324
.583/.594
296/222
75%
86.7/113
257/333
.516/.509
307/224
73%
89.9/114
266/336
.459/.44
316/224
70.9%
92.6/114
274/336
.413/.385
322/225
69.9%
94.3/114
279/338
.374/.344
-263/196
74.6%
1.44
.422/.321
Chevy Bow Tie Tri-Mark Iron178/-2.02/1.60N/A67/58
86.6%
125/90
72%
180/125
69.4%
56.2/62.2
166/184
.648/.568
218/135
61.9%
68/67.1
202/199
.588/.46
220/142
64.5%
68.6/70.6
203/209
.475/.387
216/147
68.1%
67.4/73.1
200/217
.389/.334
----192/128
66.6%
1.24
.409/.324
Chevy Bow Tie Tri-Mark Ported Stealth Iron178/-2.02/1.60N/A68/60
88.2%
134/117
87.3%
192/152
79.2%
59.9/75.6
178/224
.691/.69
228/165
72.4%
71.1/82.1
211/243
.615/.562
238/170
71.4%
74.3/84.6
220/251
.514/.463
243/176
72.4%
75.8/87.5
225/259
.437/.40
----207/156
75.4%
1.37
.409/.324
Chevy Bow Tie Tri-Mark Ported Super Stealth Iron178/-2.02/1.60N/A72/60
83.3%
142/115
81%
195/155
79.5%
60.8/77.1
180/228
.702/.704
236/170
72%
73.6/84.6
218/251
.637/.579
246/175
71.1%
76.8/87
227/258
.531/.477
252/181
71.8%
78.6/90
233/267
.453/.411
----214/159
74.3%
1.42
.409/.324
Chevy Bow Tie 2N/A-N/A----250/174
69.6%
-
------
Chevy Bow Tie Phase II Iron CCM184/55-6463/57
90.5%
130/100
76.9%
177/119
67.2%
-
205/123
60%
-
225/123
54.7%
-
210/127
60.5%
-
209/127
60.8%
-
---193/120
62.2%
1.22/2.31
Chevy Bow Tie Vortec 185 CHW185/642.00/1.55
-
No Pipe
6562/49
79%
123/96
78%
172/124
72.1%
54.7/65.7
162/195
.625/.581
214/137
64%
68.1/72.6
202/215
.583/.482
233/144
61.8%
74.2/76.3
220/226
.508/.405
227/148
65.2%
72.3/78.4
214/232
.412/.347
228/153
67.1%
72.6/81.1
215/240
.355/.307
---200/134
67%
1.26/2.39
.405/.314
Chevy Bow Tie Vortec 206 CHW206/772.00/1.55
-
No Pipe
6561/50
82%
127/99
78%
177/123
69.5%
56.3/65.2
167/193
.643/.577
216/140
64.8%
68.8/74.2
204/220
.589/.492
227/148
65.2%
72.3/78.4
214/232
.495/.416
233/155
66.5%
74.2/82.1
220/243
.423/.363
235/159
67.7%
74.8/84.3
222/250
.366/.319
---203/137
67.8%
1.14/2.06
.405/.314
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 083 NPS IronN/A1.94/1.50
4.016
No Pipe
N/A57/48
84.2%
113/99
87.6%
156/133
85.3%
52.8/75.3
156/223
.584/.644
178/140
78.7%
60.2/79.2
178/235
.50/.509
187/141
75.4%
63.3/79.8
187/236
.42/.41
187/143
76.5%
63.3/80.9
187/240
.35/.346
----164/131
79.9%
-
.393/.304
Chevy 186 Fuelie Iron161/652.02/1.606460/38
63.3%
113/76
67.3%
159/110
69.2%
49.6/54.7
147/162
.572/.50
182/125
68.7%
56.8/62.2
168/184
.491/.426
187/135
72.2%
58.4/67.1
173/199
.404/.368
188/140
74.5%
58.7/69.6
174/206
.338/.318
----166/117
70.7%
1.17/2.15
.409/.324
Chevy 291 3-angle VJ Meaux Racing SF600 IronN/A1.94/1.50
4.00
Pipe
N/A-100/88
88%
155/124
80%
52.4/70.2
155/208
.581/.601
189/142
75.1%
63.9/80.4
189/238
.531/.516
191/142
74.3%
64.6/80.4
191/238
.429/.413
193/146
75.6%
65.3/82.6
193/245
.361/.354
----166/128
77.5%
-
.393/.304
Chevy 291 Bowl Ported exhaust Cleanup trmnatr IronN/A2.02/1.60
4.00
No Pipe
N/A60/53
88.3%
125/101
80.8%
181/138
76.2%
56.5/68.6
167/203
.651/.627
216/163
75.5%
67.4/81.1
200/240
.583/.555
227/183
80.6%
70.8/91
210/270
.49/.499
227/190
83.7%
70.8/94.5
210/280
.408/.431
----195/155
79.4%
-
.409/.324
Chevy 291 SS trmnatr Iron162/651.94/1.50
4.06
No Pipe - Stahl 1/2" Adaptor
57.5-127/106
83.5%
187/141
75.4%
63.3/79.8
187/236
.701/.683
225/167
74.2%
76.1/94.5
226/280
.632/.607
244/185
75.8%
82.5/105
245/310
.548/.538
249/194
77.9%
84.2/110
250/325
.466/.47
253/198
78.3%
85.6/112
254/332
.406/.411
256/200
78.1%
86.6/113
257/335
.36/.363
--220/170
77.3%
1.58/3.08
.393/.304
Chevy 292 Bill Jones IronN/A2.02/1.60
-
No Pipe
N/A61/56
91.8%
120/98
81.7%
164/123
75%
51.2/61.2
152/181
.59/.559
190/130
68.4%
59.3/64.7
176/192
.513/.443
206/132
64.1%
64.3/65.7
190/195
.445/.36
212/119
56.1%
66.2/59.2
196/175
.381/.27
----178/120
67.5%
-
.409/.324
Chevy 292 Ported Bill Jones IronN/A2.06/1.635
-
No Pipe
N/A68/57
83.8%
141/117
83%
189/171
90.5%
56.7/81.4
168/241
.667/.76
222/189
85.1%
66.6/90
197/267
.587/.63
245/201
82%
73.5/95.7
218/284
.519/.536
256/207
80.9%
76.8/98.6
228/292
.452/.46
----211/177
84%
-
.417/.331
Chevy 292 Ported Butch Elkins Iron197.4/-2.02/1.625N/A-137/110
80.3%
196/157
80.1%
61.2/75.7
181/224
.705/.702
235/185
78.7%
73.3/89.2
217/264
.634/.621
253/194
76.7%
78.9/93.5
234/277
.546/.521
267/198
74.2%
83.3/95.5
247/283
.48/.443
----218/169
77.6%
-
.409/.329
Chevy 292 Ported Lee Shepard IronN/A2.04/1.60
4.00
Pipe
N/A-126/128
101%
193/184
95.3%
59/91.5
175/271
.688/.836
234/218
93.2%
71.6/108
212/321
.625/.743
258/230
89.1%
78.9/114
234/339
.551/.627
269/236
87.7%
82.3/117
244/348
.479/.536
274/239
87.2%
83.8/119
248/352
.418/.465
---226/206
91.2%
-
.413/.324
Chevy 292 Ported Rons Porting Service IronN/A2.04/1.60
4.00
Pipe
N/A-118/120
101%
173/157
90.8%
52.9/78.1
157/231
.616/.713
210/183
87.1%
64.2/91
190/270
.561/.623
240/218
90.8%
73.4/108
218/321
.513/.594
261/224
85.8%
79.9/111
237/330
.465/.509
274/227
82.8%
83.8/113
248/335
.418/.442
---213/188
88.5%
-
.413/.324
Chevy 292 Ported MadCap Racing Heads Iron194/-2.035/1.60
4.00
Pipe
N/A-122/115
94.3%
170/154
90.6%
52.3/76.6
155/227
.607/.699
213/193
90.6%
65.5/96
194/284
.57/.657
243/216
88.9%
74.7/107
221/318
.521/.589
261/222
85.1%
80.2/110
238/327
.466/.504
266/221
83.1%
81.8/110
242/326
.407/.43
---213/187
87.9%
1.37
.412/.324
Chevy 292 Ported Meaux Racing Iron197/-2.055/1.60
4.00
Pipe
N/A-130/119
91.5%
186/166
89.2%
56.1/82.6
166/245
.658/.754
228/213
93.4%
68.7/106
204/314
.605/.726
258/245
95%
77.8/122
230/361
.547/.668
271/256
94.5%
81.7/127
242/377
.479/.581
280/257
91.8%
84.4/128
250/379
.424/.50
---226/209
92.8%
1.42
.416/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 292 Ported Meaux Racing Iron209.6/-2.055/1.60
4.00
Pipe
N/A-132/119
90.2%
188/163
86.7%
56.7/81.1
168/240
.665/.74
233/207
88.8%
70.2/103
208/305
.618/.705
263/237
90.1%
79.3/118
235/349
.558/.646
274/251
91.6%
82.6/125
245/370
.484/.57
285/262
91.9%
85.9/130
255/386
.432/.51
---229/207
90.1%
-
.416/.324
Chevy 292 Ported Meaux Racing Iron213/-2.08/1.60
4.00
Pipe
N/A-129/-188/-
55.3
164
.657
236/-
69.5
206
.618
270/-
79.5
235
.566
285/-
83.9
249
.498
298/-
87.7
260
.446
---234
-
1.40
.421/.324
Chevy 292 Ported Joe Sherman IronN/A2.08/1.60N/A--204/141
69.1%
60/70.1
178/208
.713/.64
234/177
75.6%
68.9/88
204/261
.613/.603
261/202
77.4%
76.8/100
228/298
.547/.551
281/214
76.2%
82.7/106
245/315
.491/.486
288/217
75.3%
84.8/108
251/320
.431/.422
291/217
74.6%
85.6/108
254/320
.381/.37
--260/195
74.9%
-
.421/.324
Chevy 416 Iron165/591.84/1.5058-----------
-
-
.373/.304
Chevy 416 Bill Jones IronN/A1.72/1.50
-
No Pipe
N/A----179/127
70.9%
77/71.9
228/213
.454/.369
------
-
-
.348/.304
Chevy 416 Mild Ported Bill Jones IronN/A1.72/1.50
-
No PIpe
N/A----197/172
87.3%
84.8/97.3
251/288
.499/.50
------
-
-
.348/.304
Chevy 416 Meaux Racing IronN/A1.84/1.50
4.00
N/A-99/90
90.9%
144/118
81.9%
54.2/66.8
160/198
.569/.572
175/132
75.4%
65.8/74.7
195/221
.518/.48
185/137
74.1%
69.6/77.5
206/230
.438/.398
184/137
74.5%
69.2/77.5
205/230
.363/.332
186/137
73.7%
69.9/77.5
207/230
.315/.284
---162/125
77.2%
-
.373/.304
Chevy 416 Ported Meaux Racing SS IronN/A1.84/1.50
4.00
N/A-99/98
99%
153/136
88.9%
57.5/77
170/228
.604/.659
197/170
86.3%
74.1/96.2
220/285
.584/.618
225/183
81.3%
84.6/104
251/307
.533/.532
231/188
81.4%
86.9/106
257/315
.456/.455
235/192
81.7%
88.4/109
262/322
.398/.399
235/196
83.4%
88.4/111
262/329
.348/.356
--196/166
84.6%
-
.373/.304
Chevy 434 Weingartner Racing IronN/A2.02/1.60
4.125
No Pipe
N/A67/54
80.6%
126/104
82.5%
175/126
72%
54.6/62.7
162/186
.63/.572
209/132
63.2%
65.2/65.7
193/195
.564/.45
213/134
62.9%
66.5/66.6
197/197
.46/.365
216/133
61.6%
67.4/66.1
200/196
.389/.302
216/134
62%
67.4/66.6
200/197
.333/.261
---193/127
66.1%
-
.409/.324
Chevy 441 Iron CHP155/621.94/1.50
-
No Pipe
7655/45
81.8%
110/80
72.7%
160/112
70%
54.1/63.4
160/188
.599/.543
194/127
65.5%
65.6/71.9
194/213
.545/.461
201/136
67.7%
68/77
201/228
.452/.395
203/139
68.5%
68.7/78.7
203/233
.38/.337
----174/119
68.4%
1.31/2.24
.393/.304
Chevy 441 Iron CHP155/621.94/1.50
-
Pipe
7655/45
81.8%
110/83
75.5%
160/118
73.8%
54.1/66.8
160/198
.599/.572
194/133
68.6%
65.6/75.3
194/223
.545/.483
201/146
72.6%
68/82.6
201/245
.452/.424
203/148
72.9%
68.7/83.8
203/248
.38/.359
----174/126
72.4%
1.31/2.39
.393/.304
Chevy 461 Weingartner Racing IronN/A2.02/1.60
4.125
No Pipe
N/A66/55
83.3%
131/108
82.4%
185/137
74.1%
57.7/68.1
171/202
.666/.622
222/162
73%
69.3/80.6
205/239
.599/.552
240/174
72.5%
74.9/86.5
222/256
.518/.474
236/176
74.6%
73.6/87.5
218/259
.425/.40
234/175
74.8%
73/87
216/258
.361/.341
---208/155
74.7%
-
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 461 Iron161/632.02/1.6064----216/137
63.4%
67.4/68.1
200/202
.466/.373
------
-
1.34/2.17
.409/.324
Chevy 461 Ported IronN/A2.02/1.60
4.06
N/A94/65
69.1%
152/102
67.1%
183/126
68.9%
57.1/62.7
169/186
.658/.572
210/147
70%
65.5/73.1
194/217
.567/.501
224/162
72.3%
69.9/80.6
207/239
.484/.441
232/172
74.1%
72.4/85.5
214/253
.417/.391
238/180
75.6%
74.3/89.5
220/265
.367/.35
---207/148
71.8%
-
.409/.324
Chevy 461 Ported Creative Flow Management IronN/A2.02/1.60
4.03
No Pipe
N/A79/61
77.2%
140/110
78.6%
189/160
84.7%
59/79.6
175/236
.68/.727
231/188
81.4%
72.1/93.5
214/277
.623/.64
262/203
77.5%
81.8/101
242/299
.566/.553
274/212
77.4%
85.5/105
253/312
.493/.481
263/213
81%
82.1/106
243/314
.406/.415
---227/181
79.9%
-
.409/.324
Chevy 461 Ported SS (Oval) Iron165/652.02/1.60M/A-------260/200
76.9%
81.1/99.5
240/295
.351/.341
---
-
1.58/3.08
.409/.324
Chevy 461X 3-angle VJ Meaux Racing SF600 Iron173.5/-1.94/1.50
4.00
Pipe
N/A-100/88
88%
155/124
80%
52.4/70.2
155/208
.581/.601
189/142
75.1%
63.9/80.4
189/238
.531/.516
191/142
74.3%
64.6/80.4
191/238
.429/.413
193/146
75.6%
65.3/82.6
193/245
.361/.354
----166/128
77.5%
-
.393/.304
Chevy 461X C/ED Ported Meaux Racing SF600 IronN/A2.055/1.60
4.00
Pipe
N/A-131/116
88.5%
188/153
81.4%
56.7/76.1
168/225
.665/.695
230/194
84.3%
69.3/96.5
205/286
.61/.661
260/212
81.5%
78.4/105
232/312
.552/.578
273/245
89.7%
82.3/122
244/361
.483/.556
282/253
89.7%
85/126
252/373
.427/.492
---227/196
86%
-
.416/.324
Chevy 462 Iron CCM157/641.94/1.50
-
No Pipe
6250/54
108%
119/88
73.9%
167/116
69.5%
56.5/65.6
167/194
.626/.562
198/128
64.6%
67/72.4
198/215
.556/.465
212/134
63.2%
71.7/75.8
213/225
.476/.39
218/137
62.8%
73.8/77.5
219/230
.408/.332
----183/121
66%
1.39/2.14
.393/.304
Chevy 462 Iron CCM157/641.94/1.50
-
Pipe
6250/54
108%
119/91
76.5%
167/121
72.5%
56.5/68.5
167/203
.626/.586
198/134
67.7%
67/75.8
198/225
.556/.487
212/139
65.6%
71.7/78.7
213/233
.476/.404
218/142
65.1%
73.8/80.4
219/238
.408/.344
----183/125
68.6%
1.39/2.22
.393/.304
Chevy 462 Bill Jones IronN/A1.94/1.50
-
No Pipe
N/A58/50
86.2%
121/94
77.7%
169/124
73.4%
57.2/70.2
169/208
.633/.601
192/131
68.2%
65/74.1
192/220
.539/.476
197/135
68.5%
66.6/76.4
197/226
.443/.392
206/137
66.5%
69.7/77.5
206/230
.386/.332
----177/124
70.2%
-
.393/.304
Chevy 462 Kendrick AutoN/A2.02/1.60N/A84/56
66.7%
130/104
80%
166/125
75.3%
51.8/62.2
153/184
.597/.568
196/136
69.4%
61.2/67.6
181/200
.529/.463
214/141
65.9%
66.8/70.1
198/208
.462/.384
215/144
67%
67.1/71.6
199/212
.387/.327
----184/130
70.6%
-
.409/.324
Chevy 462 Pocket Ported Kendrick AutoN/A2.02/1.60N/A81/55
67.9%
127/109
85.8%
169/136
80.5%
52.7/67.6
156/200
.608/.618
202/159
78.7%
63/79.1
187/234
.545/.542
223/179
80.3%
69.6/89
206/264
.481/.488
226/187
82.7%
70.5/93
209/276
.407/.425
----189/154
81.3%
-
.409/.324
Chevy 492 Meaux Racing Out of Box SF600 IronN/A2.02/1.60
4.00
Pipe
N/A-115/105
91.3%
165/132
80%
51.5/65.7
153/195
.594/.60
196/138
70.4%
61.2/68.6
181/203
.529/.47
209/143
68.4%
65.2/71.1
193/211
.451/.39
207/147
71%
64.6/73.1
191/217
.372/.334
210/147
70%
65.5/73.1
194/217
.324/.286
---184/135
73.7%
-
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 492 Cast Heads Iron157/622.02/1.606469/57
82.6%
130/107
82.3%
173/125
72.3%
54/62.2
160/184
.622/.568
198/137
69.2%
61.8/68.1
183/202
.534/.467
206/141
68.4%
64.3/70.1
190/208
.445/.384
209/141
67.5%
65.2/70.1
193/208
.376/.32
209/141
67.5%
65.2/70.1
193/208
.322/.274
---188/132
70.4%
1.33/2.27
.409/.324
Chevy 492 Ported Cast Heads IronN/A2.02/1.60N/A62/56
90.3%
129/109
84.5%
180/141
78.3%
56.2/70.1
166/208
.648/.64
217/166
76.5%
67.7/82.6
201/245
.586/.565
238/174
73.1%
74.3/86.5
220/256
.514/.474
244/181
74.2%
76.1/90
226/267
.439/.411
246/185
75.2%
76.8/92
227/273
.379/.36
---209/159
76.2%
-
.409/.324
Chevy 492 Tri-Mark Iron161/-2.02/1.606469/57
82.6%
129/108
83.7%
172/124
72.1%
53.7/61.7
159/183
.619/.563
196/141
71.9%
61.2/70.1
181/208
.529/.48
207/142
68.6%
64.6/70.6
191/209
.447/.387
210/143
68.1%
65.5/71.1
194/211
.378/.325
----183/132
72%
1.30
.409/.324
Chevy 492 Ported Tri-Mark Stealth Iron169/-2.02/1.606468/58
85.3%
141/113
80.1%
192/145
75.5%
59.9/72.1
178/214
.691/.659
218/162
74.3%
68/80.6
202/239
.588/.552
234/167
71.4%
73/83.1
216/246
.505/.455
240/170
70.8%
74.9/84.6
222/251
.432/.386
----205/151
73.9%
1.42
.409/.324
Chevy 882 Iron CCM151/591.94/1.50
-
No Pipe
7670/58
82.9%
125/108
86.4%
175/135
77.1%
59.2/76.4
175/226
.656/.654
204/141
69.1%
69/79.8
204/236
.573/.512
205/142
69.3%
69.4/80.4
205/238
.461/.413
206/142
68.9%
69.7/80.4
206/238
.386/.344
----183/134
73%
1.36/2.41
.393/.304
Chevy 882 Iron CCM151/591.94/1.50
-
Pipe
7670/59
84.3%
125/109
87.2%
175/136
77.7%
59.2/77
175/228
.656/.659
204/143
70.1%
69/80.9
204/240
.573/.52
205/144
70.2%
69.4/81.5
205/241
.461/.419
206/145
70.4%
69.7/82.1
206/243
.386/.351
----183/135
74%
1.36/2.46
.393/.304
Chevy Fast Burn 4298 GM Alum202/782.00/1.556262/55
88.7%
136/104
76.5%
187/133
71.1%
59.5/70.5
176/209
.679/.624
232/158
68.1%
73.8/83.7
219/248
.632/.556
266/180
67.7%
84.7/95.4
251/283
.58/.506
275/193
70.2%
87.5/102
259/303
.50/.452
----219/154
70.1%
1.36/2.47
.405/.314
Chevy Fast Burn 4298 Bob202/782.00/1.55N/A-133/98
73.7%
183/129
70.5%
58.3/68.4
173/203
.665/.605
225/150
66.7%
71.6/79.5
212/236
.613/.527
254/171
67.3%
80.9/90.6
240/269
.554/.481
244/179
73.4%
77.7/94.9
230/281
.443/.42
248/184
74.2%
78.9/97.5
234/289
.386/.37
---215/152
70.8%
1.26/2.36
.405/.314
Chevy Fast Burn Dr Js PerformanceN/A2.00/1.55N/A70/51
72.9%
136/101
74.3%
188/140
74.5%
59.8/74.2
177/220
.683/.656
224/167
74.6%
71.3/88.5
211/262
.61/.587
237/189
79.7%
75.4/100
224/297
.517/.532
236/200
84.7%
75.1/106
223/314
.429/.469
237/207
87.3%
75.4/110
224/325
.369/.416
---210/167
79.8%
-
.405/.314
Chevy Fast Burn CNC Dr Js PerformanceN/A2.00/1.55N/A70/51
72.9%
138/101
73.2%
194/134
69.1%
61.8/71
183/210
.705/.628
236/178
75.4%
75.1/94.3
223/280
.643/.626
265/202
76.2%
84.4/107
250/317
.578/.568
278/220
79.1%
88.5/117
262/345
.505/.516
284/234
82.4%
90.4/124
268/367
.442/.47
---233/178
76.6%
-
.405/.314
Chevy Fast Burn Harry CNC Alum215/762.00/1.556262/55
88.7%
136/104
76.5%
187/133
71.1%
59.5/70.5
176/209
.679/.624
232/158
68.1%
73.8/83.7
219/248
.632/.556
266/180
67.7%
84.7/95.4
251/283
.58/.506
275/193
70.2%
87.5/102
259/303
.50/.452
----219/154
70.1%
1.28/2.54
.405/.314
Chevy Fast Burn 7712 Out of Box Meaux Racing SF600 Alum210/-2.00/1.55
4.125
No Pipe
62-134/111
82.8%
177/124
70.1%
56.3/65.7
167/195
.643/.581
205/149
72.7%
65.3/79
193/234
.559/.524
223/166
74.4%
71/88
210/261
.486/.467
234/177
75.6%
74.5/93.8
221/278
.425/.415
237/182
76.8%
75.4/96.5
224/286
.369/.366
---202/152
75.1%
1.13
.405/.314
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy Fast Burn Off ZZ383 Out of Box Smithberg Racing Alum210/782.00/1.55
4.03
6264/-134/-191/-
60.8
180
.694
234/-
74.5
221
.638
266/-
84.7
251
.58
253/-
80.5
239
.46
----216
-
1.27
.405/.314
Chevy Fast Burn Off ZZ383 VJ 2.02 Int Smithberg Racing Alum210/782.02/-
4.03
N/A72/-148/-191/-
59.6
177
.687
236/-
73.6
218
.637
270/-
84.3
250
.583
259/-
80.8
239
.466
----221
-
1.29
.409
Chevy Fast Burn Off ZZ383 Ported Smithberg Racing Alum210/782.02/-
4.03
6270/-140/-199/-
62.1
184
.716
249/-
77.7
230
.672
286/-
89.2
264
.617
296/-
92.4
274
.532
299/-
93.3
276
.461
---245
-
1.42
.409
Chevy TurboN/A-N/A-----201/177
88.1%
-
-----
Chevy L83 462624 Jonas158/-1.94/1.507644/41
93.2%
101/82
81.2%
155/125
80.6%
52.4/70.7
155/210
.581/.606
182/137
75.3%
61.6/77.5
182/230
.511/.498
196/140
71.4%
66.3/79.2
196/235
.441/.407
-----159/121
76.3%
1.24
.393/.304
Chevy L98 113 Alum163/581.94/1.505862/-116/-161/-
54.5
161
.603
185/-
62.6
185
.52
195/-
66
195
.438
198/-
67
198
.371
----171
-
1.21
.393/.304
Chevy L98 113 Alum163/581.94/1.505862/53
85.5%
115/101
87.8%
159/134
84.3%
53.8/75.8
159/225
.596/.649
189/157
83.1%
63.9/88.8
189/263
.531/.57
190/171
90%
64.3/96.8
190/287
.427/.497
-----163/141
86.2%
1.17/2.95
.393/.304
Chevy L98 Weingartner Racing AlumN/A1.94/1.50
4.125
No Pipe
N/A60/70
116%
114/108
94.7%
174/152
87.4%
58.9/86
174/255
.652/.736
199/152
76.4%
67.3/86
199/255
.559/.552
205/166
81%
69.4/93.9
205/278
.461/.483
207/168
81.2%
70/95.1
207/282
.388/.407
----180/149
83%
-
.393/.304
Chevy L98 113 Ported Precision Motorsports AlumN/A2.02/-N/A87/-144/-180/-
56.2
166
.648
218/-
68
202
.588
235/-
73.3
217
.507
243/-
75.8
225
.437
----204
-
-
.409
Chevy L98 113 CNC TPIS AlumN/A2.00/1.566055/40
72.7%
122/112
91.8%
193/154
79.8%
61.4/80.6
182/239
.701/.717
242/181
74.8%
77/94.7
228/281
.66/.632
270/197
73%
85.9/103
255/305
.589/.551
262/205
78.2%
83.4/107
247/318
.476/.478
----218/170
78%
-
.405/.316
Chevy L98 Alum163/581.94/1.5058-120/100
83.3%
163/129
79.1%
55.1/73
163/216
.611/.625
189/148
78.3%
63.9/83.8
189/248
.531/.538
199/164
82.4%
67.3/92.8
199/275
.447/.477
199/167
83.9%
67.3/94.5
199/280
.373/.405
----174/142
81.4%
1.22/2.88
.393/.304
Chevy L98 Alum163/581.94/1.50
-
No Pipe
N/A56/49
87.5%
120/96
80%
160/123
76.9%
54.1/69.6
160/206
.599/.596
186/140
75.3%
62.9/79.2
186/235
.523/.509
196/155
79.1%
66.3/87.7
196/260
.441/.451
199/157
78.9%
67.3/88.8
199/263
.373/.38
----172/134
77.9%
1.22/2.71
.393/.304
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy L98 Hutter Alum173/-1.94/1.5063-139/110
79.1%
190/145
76.3%
64.3/82.1
190/243
.712/.703
229/175
76.4%
77.5/99
230/293
.643/.636
243/190
78.2%
82.2/108
244/319
.546/.552
246/196
79.7%
83.2/111
247/329
.461/.475
----209/163
77.9%
1.42
.393/.304
Chevy L98 CNC Chapman Alum185/662.00/1.56
-
No Pipe
6261/52
85.2%
121/109
90.1%
172/149
86.6%
54.7/78
162/231
.625/.694
216/182
84.3%
68.8/95.2
204/282
.589/.636
252/192
76.2%
80.2/100
238/298
.549/.537
-----190/158
83%
1.36/2.91
.405/.316
Chevy L98 Ported ET Performance Alum184/-2.00/1.55
4.03
62.567/52
77.6%
129/104
80.6%
187/146
78.1%
59.5/77.4
176/229
.679/.685
228/175
76.8%
72.6/92.7
215/275
.621/.615
242/188
77.7%
77/99.6
228/295
.528/.529
247/193
78.1%
78.6/102
233/303
.449/.452
----207/161
78%
1.34
.405/.314
Chevy Vortec Iron CHP170/-1.94/1.506566/57
86.4%
129/101
78.3%
186/136
73.1%
62.9/77
186/228
.697/.659
219/149
68%
74.1/84.3
220/250
.615/.541
216/155
71.8%
73.1/87.7
217/260
.485/.451
-----188/135
72.1%
1.29
.393/.304
Chevy Vortec Ported Chad Speier Iron200/-2.055/1.60N/A71/50
70.4%
147/113
76.9%
204/183
89.7%
61.5/91
182/270
.721/.831
245/183
74.7%
73.9/91
219/270
.65/.623
270/205
75.9%
81.4/102
241/302
.573/.559
276/220
79.7%
83.2/109
247/324
.488/.50
279/228
81.7%
84.1/113
249/336
.423/.444
282/232
82.3%
85/115
252/342
.374/.395
--243/195
80.1%
1.41
.416/.324
Chevy Vortec 062 Weingartner Racing IronN/A1.94/1.50
4.125
No Pipe
N/A73/61
83.6%
144/113
78.5%
202/145
71.8%
68.3/82.1
202/243
.757/.703
236/158
66.9%
79.8/89.4
237/265
.663/.574
233/162
69.5%
78.8/91.7
234/272
.524/.471
233/165
70.8%
78.8/93.4
234/277
.436/.40
----210/149
70.9%
-
.393/.304
Chevy Vortec 906 Weingartner Racing IronN/A1.94/1.50
4.125
No Pipe
N/A76/54
71.1%
137/106
77.4%
199/139
69.8%
67.3/78.7
199/233
.745/.673
239/152
63.6%
80.9/86
240/255
.671/.552
240/157
65.4%
81.2/88.8
241/263
.539/.456
241/159
66%
81.5/90
242/267
.451/.385
----211/143
67.5%
-
.393/.304
Chevy Vortec 906 NPS IronN/A1.94/1.50
4.016
No Pipe
N/A62/43
69.4%
125/89
71.2%
178/119
66.9%
60.2/67.3
178/200
.667/.577
207/130
62.8%
70/73.6
207/218
.582/.472
225/134
59.6%
76.1/75.8
226/225
.506/.39
222/136
61.3%
75.1/77
223/228
.416/.329
----191/122
63.5%
-
.393/.304
Chevy Vortec 906 Meaux Racing SF600 Iron170/-1.94/1.50
4.00
N/A-121/98
81%
179/124
69.3%
60.6/70.2
179/208
.671/.601
219/137
62.6%
74.1/77.5
220/230
.615/.498
221/146
66.1%
74.8/82.6
222/245
.497/.424
223/152
68.2%
75.4/86
224/255
.418/.368
----193/131
68.2%
1.31
.393/.304
Chevy Vortec 906 Meaux Racing 3 Angle VJ and clean up SF600 Iron170/-1.94/1.50
4.00
N/A-134/107
79.9%
187/142
75.9%
63.3/80.4
187/238
.701/.688
223/157
70.4%
75.4/88.8
224/263
.627/.57
221/163
73.8%
74.8/92.2
222/273
.497/.474
-----191/142
74.4%
1.31
.393/.304
Chevy Vortec 906 Ported Meaux Racing Level 2 SF600 IronN/A2.055/1.60
4.00
No Pipe
N/A-144/119
82.6%
192/170
88.5%
57.9/84.6
172/251
.679/.772
236/195
82.6%
71.2/97
211/287
.626/.664
264/207
78.4%
79.6/103
236/305
.56/.564
265/213
80.4%
79.9/106
237/314
.469/.484
271/216
79.7%
81.7/107
242/318
.411/.42
---229/187
81.6%
-
.416/.324
Chevy Vortec 906 CHW Iron170/641.94/1.50
-
No Pipe
6563/44
69.8%
127/93
73.2%
178/125
70.2%
60.2/70.7
178/210
.667/.606
212/140
66%
71.7/79.2
213/235
.596/.509
229/144
62.9%
77.5/81.5
230/241
.515/.419
224/146
65.2%
75.8/82.6
225/245
.42/.354
223/147
65.9%
75.4/83.2
224/246
.358/.305
---199/133
66.6%
1.35/2.30
.393/.304
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy Vortec 906 Ported CHW Iron178/642.05/1.60
-
No Pipe
6670/61
87.1%
143/115
80.4%
193/139
72%
58.5/69.1
173/205
.684/.631
230/165
71.7%
69.7/82.1
206/243
.612/.562
251/170
67.7%
76/84.6
225/251
.534/.463
241/177
73.4%
73/88
216/261
.427/.402
235/180
76.6%
71.2/89.5
211/265
.357/.35
---216/158
73.2%
1.41/2.81
.415/.324
Chevy Vortec 906 Ported Smithberg Racing Street Bowl SSR work Iron178/652.00/1.56
4.03
No Pipe
6667/52
77.6%
140/104
74.3%
200/143
71.5%
63.7/74.8
189/222
.727/.666
245/165
67.3%
78/86.3
231/256
.668/.576
250/184
73.6%
79.6/96.3
236/285
.545/.514
252/190
75.4%
80.2/99.4
238/295
.458/.443
----217/157
72.3%
1.42/2.92
.405/.316
Chevy Vortec Scoggin-Dickey 170 Iron CHP170/A1.94/1.506357/40
70.2%
123/100
81.3%
174/139
79.9%
58.9/78.7
174/233
.652/.673
212/153
72.2%
71.7/86.6
213/257
.596/.556
210/160
76.2%
71/90.5
211/268
.472/.465
207/162
78.3%
70/91.7
207/272
.388/.392
----185/143
77.1%
1.25
.393/.304
Chevy Vortec Scoggin-Dickey 180 Iron CHP180/-2.00/1.556571/53
74.6%
139/102
73.4%
182/131
72%
57.9/69.4
172/206
.661/.614
224/146
65.2%
71.3/77.4
211/229
.61/.513
248/161
64.9%
78.9/85.3
234/253
.541/.453
240/165
68.8%
76.4/87.4
226/259
.436/.387
----207/141
68.2%
1.38
.405/.314
Chevy Vortec L30 059N/A1.84/1.50N/A68/47
69.1%
128/103
80.5%
179/138
77.1%
67.3/78.1
199/231
.707/.669
205/152
74.1%
77.1/86
228/255
.607/.552
221/163
73.8%
83.1/92.2
246/273
.524/.474
-----183/139
75.9%
-
.373/.304
Chevy Vortec L31 Iron170/611.94/1.506458/43
74.1%
114/88
77.2%
173/125
72.3%
58.5/70.7
173/210
.648/.606
216/143
66.2%
73.1/80.9
217/240
.607/.52
225/149
66.2%
76.1/84.3
226/250
.506/.433
222/152
68.5%
75.1/86
223/255
.416/.368
----190/131
69.2%
1.32/2.49
.393/.304
Chevy Vortec L31 885 Iron CCM170/611.94/1.50
-
No Pipe
6470/48
68.6%
138/101
73.2%
190/129
67.9%
64.3/73
190/216
.712/.625
227/140
61.7%
76.8/79.2
228/235
.638/.509
239/147
61.5%
80.9/83.2
240/246
.537/.427
229/151
65.9%
77.5/85.4
230/253
.429/.366
----205/134
65.3%
1.41/2.48
.393/.304
Chevy Vortec L31 885 Iron CCM170/611.94/1.50
-
Pipe
6470/49
70%
139/105
75.5%
190/137
72.1%
64.3/77.5
190/230
.712/.664
227/151
66.5%
76.8/85.4
228/253
.638/.549
239/160
66.9%
80.9/90.5
240/268
.537/.465
229/162
70.7%
77.5/91.7
230/272
.429/.392
----205/143
69.8%
1.41/2.66
.393/.304
Chevy Vortec L31 885 Ported Iron CHPN/A1.94/1.50N/A60/50
83.3%
128/101
78.9%
193/162
83.9%
65.3/91.7
193/272
.723/.785
224/181
80.8%
75.8/102
225/303
.629/.658
239/181
75.7%
80.9/102
240/303
.537/.526
-----196/156
79.7%
-
.393/.304
Chevy Vortec L31 Tri-Mark Iron168/-1.94/1.506467/51
76.1%
129/98
76%
183/133
72.7%
61.9/75.3
183/223
.686/.644
218/146
67%
73.8/82.6
219/245
.612/.531
217/151
69.6%
73.4/85.4
218/253
.488/.439
216/152
70.4%
73.1/86
217/255
.405/.368
----193/136
70.6%
1.30
.393/.304
Chevy Vortec L31 Tri-Mark Ported Stealth Iron173/-1.94/1.50N/A68/58
85.3%
134/117
87.3%
192/145
75.5%
65/82.1
192/243
.719/.703
224/146
65.2%
75.8/82.6
225/245
.629/.531
232/170
73.3%
78.5/96.2
233/285
.521/.494
238/171
71.8%
80.5/96.8
239/287
.446/.414
----204/150
73.4%
1.38
.393/.304
Chevy Vortec L31 Tri-Mark Ported Super Stealth Iron184/-1.94/1.50N/A67/60
89.6%
142/115
81%
198/155
78.3%
67/87.7
198/260
.742/.751
236/170
72%
79.8/96.2
237/285
.663/.618
246/175
71.1%
83.2/99
247/293
.553/.509
251/181
72.1%
84.9/102
252/303
.47/.438
----215/159
74.2%
1.36
.393/.304
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy Vortec Ported McCoyN/A-N/A----266/200
75.2%
-
------
Chevy Vortec / Bow Tie 421 Small Port Iron175/652.00/1.5565---225/152
67.6%
71.6/80.6
212/239
.613/.535
235/161
68.5%
74.8/85.3
222/253
.512/.453
236/163
69.1%
75.1/86.4
223/256
.429/.382
----232/159
68.4%
1.35/2.51
.405/.314
Chevy Vortec / Bow Tie 431 Large Port Iron206/772.00/1.5565-----268/164
61.2%
85.3/86.9
253/258
.487/.384
-----
-
1.30/2.13
.405/.314
Chevy Vortec / Bow Tie Small Port Bob Iron175/642.00/1.55N/A67/53
79.1%
136/100
73.5%
182/128
70.3%
57.9/67.8
172/201
.661/.60
223/145
65%
71/76.8
210/228
.608/.51
251/152
60.6%
79.9/80.6
237/239
.547/.428
240/164
68.3%
76.4/86.9
226/258
.436/.384
240/166
69.2%
76.4/88
226/261
.374/.334
---212/143
67.2%
1.43/2.59
.405/.314
Chevy Vortec / Bow Tie Large Port Bob Iron206/772.00/1.55N/A63/50
79.4%
133/100
75.2%
182/134
73.6%
57.9/71
172/210
.661/.628
228/154
67.5%
72.6/81.6
215/242
.621/.542
258/168
65.1%
82.1/89
243/264
.562/.473
255/168
65.9%
81.2/89
241/264
.463/.394
261/169
64.8%
83.1/89.6
246/265
.406/.34
---220/149
67.8%
1.27/2.19
.405/.314
Chevy Vortec / Bow Tie Large Port Iron215/842.00/1.5566-----------
-
-
.405/.314
Chevy 364 18 Deg 248 RCR Super Truck Alum248/-2.14/1.6058-147/100
68%
231/167
72.3%
64.2/83.1
190/246
.784/.759
287/205
71.4%
79.8/102
236/302
.731/.698
324/237
73.1%
90.1/118
267/349
.66/.646
338/251
74.3%
94/125
278/370
.574/.57
343/257
74.9%
95.4/128
283/379
.499/.50
---278/203
72.9%
1.38
.433/.324
Chevy 580 18 Deg 245 RCR Super Truck Alum245/-2.15/1.62554/65-148/124
83.8%
223/180
80.7%
61.4/86.8
182/257
.754/.805
281/223
79.4%
77.4/108
229/319
.712/.748
325/238
73.2%
89.5/115
265/340
.659/.639
343/244
71.1%
94.5/118
280/349
.58/.546
346/247
71.4%
95.3/119
282/353
.501/.473
---278/209
75.4%
1.41
.435/.329
Chevy 364 / 580 18 Deg 236 CNC Chapman Alum236/-2.135/1.625
-
No Pipe
52/6571/54
76.1%
159/108
67.9%
224/182
81.3%
62.6/87.8
185/260
.762/.814
273/222
81.3%
76.3/107
226/317
.697/.745
305/238
78%
85.2/115
252/340
.623/.639
314/250
79.6%
87.7/121
260/357
.534/.559
323/260
80.5%
90.2/125
267/371
.471/.498
---266/210
78.8%
1.37
.432/.329
Chevy 364 / 580 18 Deg 246 CNC Chapman Alum246/-2.15/1.625
-
No Pipe
52/6568/52
76.5%
159/112
70.4%
227/175
77.1%
62.5/84.4
185/250
.767/.783
281/218
77.6%
77.4/105
229/311
.712/.731
319/235
73.7%
87.9/113
260/336
.647/.631
333/247
74.2%
91.7/119
272/353
.563/.552
342/255
74.6%
94.2/123
279/364
.495/.489
---277/207
74.8%
1.39
.435/.329
Chevy 364 / 580 18 Deg 256 CNC Chapman Alum256/-2.18/1.625
-
No Pipe
52/6672/54
75%
161/108
67.1%
233/182
78.1%
62.4/87.8
185/260
.777/.814
286/222
77.6%
76.6/107
227/317
.715/.745
321/238
74.1%
86/115
255/340
.642/.639
344/250
72.7%
92.2/121
273/357
.573/.559
348/260
74.7%
93.2/125
276/371
.497/.498
---282/210
74.4%
1.36
.441/.329
Chevy 364 / 580 18 Deg 266 CNC Chapman Alum266/-2.18/1.625
-
No Pipe
52/6671/51
71.8%
151/114
75.5%
226/180
79.6%
60.5/86.8
179/257
.753/.805
271/213
78.6%
72.6/103
215/304
.678/.714
323/240
74.3%
86.5/116
256/343
.646/.644
353/248
70.3%
94.6/120
280/354
.588/.555
358/255
71.2%
95.9/123
284/364
.511/.489
363/260
71.6%
97.3/125
288/371
.454/.436
--292/216
73.8%
1.36
.441/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 364 / 580 18 Deg 249 Ported Hutter Alum249/-2.15/1.62553/64-151/117
77.5%
232/163
70.3%
63.9/78.6
189/233
.784/.729
293/224
76.5%
80.7/108
239/320
.743/.751
322/244
75.8%
88.7/118
263/349
.653/.655
343/254
74.1%
94.5/122
280/363
.58/.568
347/261
75.2%
95.6/126
283/373
.503/.50
---281/211
74.8%
1.39
.435/.329
Chevy 18 Deg Ported ET Performance Alum257/-2.15/1.60
4.03
N/A74/49
66.2%
159/114
71.7%
231/177
76.6%
63.6/88
189/261
.781/.804
288/219
76%
79.3/109
235/323
.73/.746
323/238
73.7%
89/118
264/351
.655/.649
341/246
72.1%
93.9/122
278/363
.576/.559
----268/199
74.1%
1.33
.435/.324
Chevy 18 Deg 247RS CNC Chapman Alum247/1052.15/1.625
-
No Pipe
47.572/51
70.8%
157/114
72.6%
228/180
78.9%
62.8/86.8
186/257
.771/.805
278/213
76.6%
76.6/103
227/304
.705/.714
317/240
75.7%
87.3/116
259/343
.643/.644
338/248
73.4%
93.1/120
276/354
.571/.555
342/255
74.6%
94.2/123
279/364
.495/.489
346/260
75.1%
95.3/125
282/371
.439/.436
--287/216
75.3%
1.40/2.48
.435/.329
Chevy 18 Deg 255RS CNC Chapman Alum255/1052.18/1.625
-
No Pipe
47.571/51
71.8%
150/114
76%
226/180
79.6%
60.5/86.8
179/257
.753/.805
277/213
76.9%
74.2/103
220/304
.693/.714
323/240
74.3%
86.5/116
256/343
.646/.644
347/248
71.5%
93/120
275/354
.578/.555
351/255
72.6%
94/123
279/364
.501/.489
354/260
73.4%
94.8/125
281/371
.443/.436
--290/216
74.5%
1.39/2.48
.441/.329
Chevy 18 Deg 270RS CNC Chapman Alum270/1052.18/1.625
-
No Pipe
47.571/51
71.8%
151/114
75.5%
226/180
79.6%
60.5/86.8
179/257
.753/.805
271/213
78.6%
72.6/103
215/304
.678/.714
323/240
74.3%
86.5/116
256/343
.646/.644
353/248
70.3%
94.6/120
280/354
.588/.555
358/255
71.2%
95.9/123
284/364
.511/.489
363/260
71.6%
97.3/125
288/371
.454/.436
--292/216
73.8%
1.34/2.48
.441/.329
Chevy 18 Deg 235 CNC M2 Race Systems Alum235/-2.15/1.625
4.03
48--219/182
83.1%
60.3/87.8
179/260
.74/.814
277/238
85.9%
76.3/115
226/340
.702/.798
320/254
79.4%
88.1/122
261/363
.649/.682
340/262
77.1%
93.7/126
277/374
.575/.586
337/268
79.5%
92.8/129
275/383
.488/.514
---299/241
80.6%
1.45
.435/.329
Chevy 18 Deg 255 CNC M2 Race Systems Alum255/-2.18/1.625
4.03
48--220/182
82.7%
58.9/87.8
175/260
.733/.814
279/238
85.3%
74.7/115
221/340
.698/.798
320/254
79.4%
85.7/122
254/363
.64/.682
351/262
74.6%
94/126
279/374
.585/.586
360/268
74.4%
96.4/129
286/383
.514/.514
---306/241
78.7%
1.41
.441/.329
Chevy 18 Deg 270 CNC M2 Race Systems Alum270/-2.18/1.625
4.03
52--211/172
81.5%
56.5/82.9
167/246
.703/.769
272/213
78.3%
72.9/103
216/304
.68/.714
315/236
74.9%
84.4/114
250/337
.63/.633
352/247
70.2%
94.3/119
279/353
.587/.552
375/254
67.7%
100/122
298/363
.536/.487
381/262
68.8%
102/126
302/374
.476/.439
--318/231
72.6%
1.41
.441/.329
Chevy 18 Deg CNC AlumN/A2.20/1.625N/A72/55
76.4%
151/111
73.5%
220/158
71.8%
57.9/76.2
171/226
.727/.707
275/218
79.3%
72.3/105
214/311
.681/.731
317/237
74.8%
83.4/114
247/339
.628/.636
353/250
70.8%
92.9/121
275/357
.583/.559
367/256
69.8%
96.5/123
286/366
.52/.491
371/262
70.6%
97.6/126
289/374
.46/.439
--293/213
72.6%
-
.446/.329
Chevy 15 Deg CNC AlumN/A2.15/1.625N/A72/53
73.6%
154/111
72.1%
227/152
67%
62.5/73.3
185/217
.767/.68
227/209
92.1%
62.5/101
185/299
.575/.701
326/240
73.6%
89.8/116
266/343
.661/.644
349/253
72.5%
96.1/122
285/361
.59/.566
353/259
73.4%
97.2/125
288/370
.511/.496
358/262
73.2%
98.6/126
292/374
.454/.439
--285/212
74.5%
-
.435/.329
Chevy 15 Deg CNC M2 Race Systems245/-2.18/1.625
4.03
50-----------
-
-
.441/.329
Chevy 615x 15 Deg 261 CNC Chapman Alum261/1002.18/1.625
-
No Pipe
5869/52
75.4%
149/110
73.8%
215/173
80.5%
57.6/83.4
171/247
.717/.774
278/215
77.3%
74.5/104
221/307
.695/.721
329/236
71.7%
88.1/114
261/337
.658/.633
363/249
68.6%
97.3/120
288/356
.605/.557
379/258
68.1%
102/124
301/369
.541/.494
391/261
66.8%
105/126
310/373
.489/.438
--301/215
71.4%
1.50/2.61
.441/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy 615 15 Deg CNC Rons Porting Service Alum278/-2.18/1.62552-158/119
75.3%
227/170
74.9%
60.8/82
180/243
.757/.76
287/214
74.6%
76.9/103
228/306
.718/.718
335/245
73.1%
89.8/118
266/350
.67/.657
360/260
72.2%
96.4/125
286/371
.60/.581
366/270
73.8%
98.1/130
291/386
.523/.517
372/274
73.7%
99.7/132
295/391
.465/.46
--301/222
73.7%
1.34
.441/.329
Chevy 15X 15 Deg 246 CNC Slawko Alum246/1022.15/1.6032-------348/265
76.1%
95.9/132
284/391
.441/.451
350/267
76.3%
96.4/133
286/393
.394/.404
-349/266
76.2%
1.42/2.62
.435/.324
Chevy / GM Splayed Valve 12 Deg MBE PortN/A2.23/1.55
4.155
No Pipe
N/A-140/102
72.9%
221/150
67.9%
56.6/79.5
168/236
.72/.703
294/186
63.3%
75.3/98.6
223/292
.719/.654
354/232
65.5%
90.6/123
269/364
.692/.653
398/266
66.8%
102/141
302/418
.649/.624
414/273
65.9%
106/145
314/429
.578/.549
415/280
67.5%
106/148
315/440
.507/.492
425/278
65.4%
109/147
322/437
.462/.434
427/-
109
324
.417
343/221
-
-
.452/.314
Chevy / GM Splayed Valve 10 Deg MBE PortN/A-
-
No Pipe
N/A---------436/-
-
-
Chevy 517 Canted Valve CNC Chapman Alum294/-2.18/1.625
-
No Pipe
4871/54
76.1%
157/114
72.6%
236/179
75.8%
63.2/86.3
187/256
.787/.801
299/224
74.9%
80.1/108
237/320
.748/.751
331/239
72.2%
88.7/115
263/341
.662/.641
355/249
70.1%
95.1/120
282/356
.592/.557
371/255
68.7%
99.4/123
295/364
.53/.489
375/258
68.8%
100/124
298/369
.469/.433
--303/217
71.5%
1.28
.441/.329
Chevy Canted Valve Ported ET Performance Alum285/-2.185/1.625
4.155
35-7264/47
73.4%
148/100
67.6%
228/142
62.3%
60.8/68.5
180/203
.758/.635
318/183
57.5%
84.8/88.2
251/261
.793/.614
375/214
57.1%
100/103
296/306
.748/.574
402/237
59%
107/114
318/339
.669/.53
414/250
60.4%
110/121
327/357
.59/.479
419/258
61.6%
112/124
331/369
.523/.433
422/263
62.3%
113/127
333/376
.468/.392
-341/206
60.4%
1.48
.442/.329
Chevy Canted Valve Ported Meaux Racing SF600 AlumN/A2.20/1.55
4.125
No Pipe
N/A-140/99
70.7%
213/150
70.4%
56/79.5
166/236
.704/.703
287/192
66.9%
75.5/102
224/301
.711/.675
335/228
68.1%
88.1/121
261/358
.664/.641
370/250
67.6%
97.3/132
288/393
.611/.586
387/261
67.4%
102/138
302/410
.548/.524
398/267
67.1%
105/142
310/419
.493/.469
--304/207
67.9%
-
.446/.314
Chevy Canted Valve 10 Deg Pro Stock Truck '01 - Darin Morgan AlumN/A2.23/-
4.20
35-145/-215/-
55
163
.701
285/-
73
216
.697
356/-
91.1
270
.696
400/-
102
303
.652
415/-
106
315
.58
425/-
109
322
.519
435/-
111
330
.473
442/-
113
335
.432
346
-
-
.452
Chevy / GM SB2.2 011 278 Ported GPTech Busch Alum278/-2.17/1.62548-152/104
68.4%
235/164
69.8%
63.5/79.1
188/234
.787/.733
300/202
67.3%
81.1/97.4
240/289
.754/.678
348/233
67%
94.1/112
279/333
.699/.625
379/249
65.7%
102/120
304/356
.635/.557
373/258
69.2%
101/124
299/369
.535/.494
---298/202
67.7%
1.36
.439/.329
Chevy / GM SB2.2 011 282 Ported GPTech Alum282/-2.18/1.62546-141/97
68.8%
226/147
65%
60.5/70.9
179/210
.753/.657
302/188
62.3%
80.9/90.6
240/269
.755/.631
355/224
63.1%
95.1/108
282/320
.71/.601
384/252
65.6%
103/122
305/360
.64/.563
390/260
66.7%
104/125
310/371
.557/.498
---300/195
65%
1.38
.441/.329
Chevy / GM SB2.2 011 275 Ported Neal Alum275/-2.15/1.6054-148/109
73.6%
235/148
63%
64.7/73.6
192/218
.794/.672
292/200
68.5%
80.4/99.5
238/295
.74/.681
335/221
66%
92.3/110
273/326
.679/.602
351/238
67.8%
96.7/118
286/351
.593/.541
356/253
71.1%
98.1/126
291/373
.516/.492
---286/195
68.1%
1.29
.435/.324
Chevy / GM SB2.2 011 282 Ported Neal Alum282/-2.15/1.62554-136/104
76.5%
217/139
64.1%
59.8/67
177/199
.733/.622
288/180
62.5%
79.3/86.8
235/257
.73/.604
335/219
65.4%
92.3/106
273/313
.679/.588
352/237
67.3%
97/114
287/339
.595/.53
352/246
69.9%
97/119
287/351
.51/.471
---280/188
67%
1.25
.435/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy / GM SB2.2 011 287 Ported Neal Alum287/-2.17/1.6056-143/95
66.4%
222/137
61.7%
60/68.1
178/202
.743/.622
293/180
61.4%
79.2/89.5
235/265
.736/.613
340/213
62.6%
91.9/106
272/314
.683/.58
374/230
61.5%
101/114
300/339
.626/.522
388/243
62.6%
105/121
311/358
.557/.473
---293/183
62.4%
1.35
.439/.324
Chevy / GM SB2.2 Ported ET Performance AlumN/A2.215/1.60
4.155
N/A76/56
73.7%
151/114
75.5%
229/169
73.8%
59.4/84.1
176/249
.751/.768
300/214
71.3%
77.9/106
231/315
.738/.729
363/240
66.1%
94.2/119
279/354
.715/.654
390/250
64.1%
101/124
300/368
.64/.568
397/254
64%
103/126
305/374
.558/.494
400/255
63.8%
104/127
308/376
.492/.434
--319/214
67.1%
-
.449/.324
Chevy / GM SB2.2 267 CNC Chapman Alum267/-2.17/1.625
-
No Pipe
5770/52
74.3%
159/112
70.4%
238/171
71.8%
64.4/82.5
191/244
.797/.765
301/207
68.8%
81.4/99.8
241/296
.756/.694
347/233
67.1%
93.8/112
278/333
.697/.625
367/249
67.8%
99.2/120
294/356
.615/.557
369/259
70.2%
99.8/125
296/370
.53/.496
373/262
70.2%
101/126
299/374
.468/.439
--308/213
69.3%
1.40
.439/.329
Chevy / GM SB2.2 292 CNC Chapman Alum292/-2.17/1.625
-
No Pipe
5765/52
80%
145/113
77.9%
236/173
73.3%
63.8/83.4
189/247
.79/.774
307/207
67.4%
83/99.8
246/296
.771/.694
367/233
63.5%
99.2/112
294/333
.737/.625
385/249
64.7%
104/120
308/356
.645/.557
389/259
66.6%
105/125
312/370
.558/.496
391/262
67%
106/126
313/374
.491/.439
--317/214
67.4%
1.34
.439/.329
Chevy / GM SB2.2 Drag MBE Port 1 Alum312/-2.19/1.59
4.15
No Pipe
N/A70/45
64.3%
156/101
64.7%
240/139
57.9%
63.7/70
189/207
.796/.635
320/188
58.8%
85/94.7
252/281
.796/.644
377/230
61%
100/116
297/343
.751/.631
413/255
61.7%
110/128
325/381
.685/.583
426/266
62.4%
113/134
335/397
.606/.521
439/272
62%
117/137
345/406
.546/.466
--339/207
61.2%
1.41
.443/.322
Chevy / GM SB2.2 Drag MBE Port 2 Alum312/-2.19/1.59N/A---------450/-
119
354
.448
-
-
1.44
.443/.322
Chevy / GM SB2.2 Drag MBE Port 3 I-55 E-55 SF600 Alum312/-2.18/1.60
4.155
No Pipe
N/A61/50
82%
142/107
75.4%
224/145
64.7%
60/72.1
178/214
.747/.659
305/191
62.6%
81.7/95
242/281
.763/.651
364/230
63.2%
97.5/114
289/339
.728/.627
406/257
63.3%
109/128
322/379
.677/.584
428/270
63.1%
115/134
340/398
.611/.526
437/278
63.6%
117/138
347/410
.546/.474
442/283
64%
118/141
351/417
.491/.428
-344/220
64.1%
1.42
.441/.324
Chevy / GM SB2.2 Hendricks - Meaux Racing SF600 AlumN/A2.18/1.60
4.125
No Pipe
N/A-142/107
75.4%
219/146
66.7%
58.7/72.6
174/215
.73/.663
289/184
63.7%
77.4/91.5
229/271
.723/.627
337/211
62.6%
90.3/105
268/311
.674/.575
359/236
65.7%
96.2/117
285/348
.598/.536
355/252
71%
95.1/125
282/371
.507/.491
356/263
73.9%
95.4/131
283/388
.445/.448
--294/200
68%
-
.441/.324
Chevy / GM SB2.2 Hendricks - Meaux Racing SF600 AlumN/A2.20/1.60
4.125
No Pipe
N/A-142/107
75.4%
219/146
66.7%
57.6/72.6
171/215
.723/.663
289/184
63.7%
76/91.5
225/271
.716/.627
337/211
62.6%
88.7/105
263/311
.668/.575
355/252
71%
93.4/125
277/371
.586/.572
356/263
73.9%
93.7/131
277/388
.504/.512
398/267
67.1%
105/133
310/393
.493/.455
--299/204
68.2%
-
.446/.324
Chevy / GM SB2.2 Hendricks - Darin Morgan SF600 AlumN/A2.18/1.60
-
No Pipe
N/A-132/90
68.2%
214/163
76.2%
57.3/81.1
170/240
.713/.74
299/200
66.9%
80.1/99.5
237/295
.748/.681
386/240
62.2%
103/119
306/354
.772/.654
410/260
63.4%
110/129
325/383
.683/.59
425/273
64.2%
114/136
337/402
.607/.531
442/278
62.9%
118/138
351/410
.553/.474
449/282
62.8%
120/140
356/416
.499/.427
451/287
63.6%
121/143
358/423
.451/.391
356/230
64.6%
-
.441/.324
Chevy / GM SB2.2 DEI - Darin Morgan SF600 AlumN/A2.18/1.60
-
No Pipe
N/A-158/101
63.9%
231/142
61.5%
61.9/70.6
183/209
.77/.645
310/180
58.1%
83.1/89.5
246/265
.775/.613
365/212
58.1%
97.8/105
290/312
.73/.578
392/244
62.2%
105/121
311/360
.653/.554
397/263
66.2%
106/131
315/388
.567/.512
404/269
66.6%
108/134
321/396
.505/.458
--322/202
62.5%
-
.441/.324
Chevy / GM SB2.2 NASCAR '02 - Darin Morgan AlumN/A2.18/-
4.185
48-161/-236/-
63.2
187
.787
312/-
83.6
248
.78
371/-
99.4
295
.742
402/-
108
319
.67
405/-
109
321
.579
412/-
110
327
.515
415/-
111
329
.461
418/-
112
332
.418
348
-
-
.441
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy / GM SB2.2 NASCAR '05 - Darin Morgan AlumN/A2.18/-
4.185
38-145/-225/-
60.3
179
.75
300/-
80.4
238
.75
375/-
100
298
.75
415/-
111
329
.692
426/-
114
338
.609
443/-
119
352
.554
451/-
121
358
.501
453/-
121
360
.453
359
-
-
.441
Chevy / GM SB2.2 Darin Morgan AlumN/A2.20/-
4.20
38-152/-226/-
59.5
176
.747
305/-
80.2
238
.756
375/-
98.6
292
.743
418/-
110
326
.69
429/-
113
334
.607
446/-
117
348
.552
453/-
119
353
.499
456/-
120
355
.452
362
-
-
.446
Chevy / GM SB2.2 Comp Elim - Darin Morgan AlumN/A2.07/-
4.00
29.5-136/-227/-
67.5
200
.797
287/-
85.3
253
.756
348/-
103
306
.733
360/-
107
317
.632
371/-
110
327
.558
382/-
114
336
.503
384/-
114
338
.449
388/-
115
342
.409
320
-
-
.419
Chevy / GM SB2.2 CNC RFD AlumN/A2.20/1.58N/A64/61
95.3%
140/115
82.1%
228/159
69.7%
60/81.1
178/240
.753/.731
312/198
63.5%
82.1/101
243/299
.773/.683
368/229
62.2%
96.8/117
287/346
.729/.632
402/253
62.9%
106/129
313/382
.664/.582
418/265
63.4%
110/135
326/400
.592/.522
429/276
64.3%
113/141
334/417
.531/.476
436/283
64.9%
115/144
340/428
.48/.434
-342/222
65.1%
-
.446/.320
Chevy / GM SB2.2 CNC RFD AlumN/A2.20/1.5836-156/109
69.9%
240/145
60.4%
63.1/74
187/219
.793/.667
322/200
62.1%
84.7/102
251/302
.798/.69
376/231
61.4%
98.9/118
293/349
.745/.638
417/262
62.8%
110/134
325/396
.689/.603
422/273
64.7%
111/139
329/413
.597/.538
441/280
63.5%
116/143
344/423
.546/.483
453/282
62.3%
119/144
353/426
.499/.432
-353/223
63%
-
.446/.320
Chevy / GM ROx 667 Weld Tech Alum288/-2.18/1.6150-147/119
81%
224/174
77.7%
60/85.5
178/253
.747/.785
293/213
72.7%
78.5/105
233/310
.733/.721
336/241
71.7%
90/118
267/351
.672/.653
373/254
68.1%
99.9/125
296/370
.622/.573
382/262
68.6%
102/129
303/381
.546/.507
386/265
68.7%
103/130
306/386
.483/.449
--306/218
71.4%
1.34
.441/.326
Chevy / GM RO7 - Darin Morgan SF600 AlumN/A2.18/-N/A-143/-221/-
59.2
175
.737
307/-
82.2
244
.768
372/-
99.7
295
.744
408/-
109
324
.68
428/-
115
340
.611
446/-
119
354
.558
453/-
121
360
.503
459/-
123
364
.459
360
-
-
.441
AeroHead Iron CHP178/701.94/1.507360/48
80%
116/101
87.1%
162/141
87%
54.8/79.8
162/236
.607/.683
219/171
78.1%
74.1/96.8
220/287
.615/.621
225/185
82.2%
76.1/105
226/310
.506/.538
226/188
83.2%
76.5/106
227/315
.423/.455
----190/157
82.9%
1.27/2.69
.393/.304
AFR 180 Street Old SF600 Alum180/-2.02/1.60
4.06
1 3/4" Pipe
68-74-129/108
83.7%
195/156
80%
60.8/77.6
180/230
.702/.709
240/178
74.2%
74.9/88.5
222/262
.648/.606
255/190
74.5%
79.6/94.5
236/280
.55/.518
260/194
74.6%
81.1/96.5
240/286
.468/.441
----216/165
76.6%
1.44
.409/.324
AFR 180 Comp Old SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe
74-144/102
70.8%
206/152
73.8%
64.3/75.6
190/224
.741/.69
245/190
77.6%
76.4/94.5
227/280
.661/.647
260/204
78.5%
81.1/101
240/301
.561/.556
268/211
78.7%
83.6/105
248/311
.482/.479
----225/172
76.5%
-
.409/.324
AFR 180 Street SF600 Alum180/-2.02/1.60
4.06
1 3/4" Pipe
65-75-138/110
79.7%
198/158
79.8%
61.8/78.6
183/233
.712/.718
240/190
79.2%
74.9/94.5
222/280
.648/.647
260/207
79.6%
81.1/103
240/305
.561/.564
-----209/166
79.5%
1.44
.409/.324
AFR 180 Comp SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe
65-75-142/115
81%
203/165
81.3%
63.3/82.1
188/243
.73/.749
247/200
81%
77.1/99.5
228/295
.666/.681
270/217
80.4%
84.3/108
250/320
.583/.591
-----216/174
80.9%
-
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR 190 Alum CCMN/A2.02/1.60N/A71/67
94.4%
144/121
84%
208/157
75.5%
64.9/78.1
192/231
.748/.713
244/188
77%
76.1/93.5
226/277
.658/.64
262/202
77.1%
81.8/100
242/298
.566/.551
261/211
80.8%
81.4/105
241/311
.469/.479
----224/176
78.6%
-
.409/.324
AFR 190 Vortec Alum190/642.02/1.60
4.06
1 3/4" Pipe
65-135/110
81.5%
213/158
74.2%
66.5/78.6
197/233
.766/.718
253/190
75.1%
78.9/94.5
234/280
.683/.647
276/207
75%
86.1/103
255/305
.596/.564
-----219/166
75.8%
1.45/3.23
.409/.324
AFR 190 Street SF600 Alum190/642.02/1.60
-
No Pipe
68-74-129/108
83.7%
195/156
80%
60.8/77.6
180/230
.702/.709
240/178
74.2%
74.9/88.5
222/262
.648/.606
260/190
73.1%
81.1/94.5
240/280
.561/.518
262/194
74%
81.8/96.5
242/286
.471/.441
----217/165
76.1%
1.38/3.03
.409/.324
AFR 190 Comp SF600 AlumN/A2.02/1.6074-135/110
81.5%
201/157
78.1%
62.7/78.1
186/231
.723/.713
243/180
74.1%
75.8/89.5
225/265
.656/.613
264/195
73.9%
82.4/97
244/287
.57/.531
276/208
75.4%
86.1/103
255/307
.496/.472
----224/170
76%
-
.409/.324
AFR 195 OLD Out of Box Weingartner Racing Alum195/-2.02/1.60
4.125
No Pipe
N/A73/53
72.6%
146/108
74%
210/150
71.4%
65.5/74.6
194/221
.756/.681
258/176
68.2%
80.5/87.5
239/259
.696/.60
279/186
66.7%
87.1/92.5
258/274
.602/.507
273/191
70%
85.2/95
252/281
.491/.434
275/192
69.8%
85.8/95.5
254/283
.424/.374
279/193
69.2%
87.1/96
258/284
.376/.329
--246/171
69.5%
1.43
.409/.324
AFR 195 Street SF600 Alum195/642.02/1.60
4.06
1 3/4" Pipe
68-74-132/108
81.8%
198/156
78.8%
61.8/77.6
183/230
.712/.709
240/178
74.2%
74.9/88.5
222/262
.648/.606
260/190
73.1%
81.1/94.5
240/280
.561/.518
262/194
74%
81.8/96.5
242/286
.471/.441
----218/165
75.6%
1.34/3.03
.409/.324
AFR 195 Comp SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe
74-135/110
81.5%
201/157
78.1%
62.7/78.1
186/231
.723/.713
249/180
72.3%
77.7/89.5
230/265
.672/.613
275/195
70.9%
85.8/97
254/287
.594/.531
280/208
74.3%
87.4/103
259/307
.504/.472
----228/170
74.6%
-
.409/.324
AFR 195 Eliminator Street SF600 Alum195/-2.05/1.6075-137/110
80.3%
194/158
81.4%
58.8/78.6
174/233
.688/.718
240/190
79.2%
72.7/94.5
215/280
.638/.647
270/207
76.7%
81.8/103
242/305
.574/.564
286/215
75.2%
86.6/107
257/317
.507/.488
----225/176
78.1%
1.47
.415/.324
AFR 195 Eliminator David Vizard Alum195/652.05/1.607575/57
76%
139/113
81.3%
198/160
80.8%
60/79.6
178/236
.702/.727
250/190
76%
75.7/94.5
224/280
.665/.647
277/207
74.7%
83.9/103
249/305
.589/.564
292/216
74%
88.5/107
262/318
.518/.491
295/220
74.6%
89.4/109
265/324
.448/.428
---242/184
76.2%
1.51/3.38
.415/.324
AFR 195 Eliminator Comp SF600 Alum195/-2.08/1.6075-140/115
82.1%
202/165
81.7%
59.4/82.1
176/243
.706/.749
248/200
80.6%
73/99.5
216/295
.65/.681
280/217
77.5%
82.4/108
244/320
.587/.591
300/225
75%
88.3/112
262/332
.524/.511
----234/184
78.8%
1.54
.421/.324
AFR 195 Eliminator Comp Out of Box Hemphill Racing SF600 Alum195/-2.08/1.60
4.04
No Pipe
7565/53
81.5%
150/116
77.3%
211/175
82.9%
62.1/87
184/258
.737/.795
255/208
81.6%
75/103
222/307
.668/.709
285/219
76.8%
83.9/109
249/323
.597/.597
305/219
71.8%
89.8/109
266/323
.533/.497
----241/187
77.7%
1.56
.421/.324
AFR 195 Eliminator Street V2 SF600 Alum195/642.05/1.60
4.06
1 3/4" Pipe
55/65-146/119
81.5%
201/166
82.6%
60.9/82.6
180/245
.713/.754
247/197
79.8%
74.8/98
222/290
.657/.671
275/213
77.5%
83.3/106
247/314
.585/.58
-----217/174
80%
1.41/3.33
.415/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR 195 Eliminator Comp V2 SF600 Alum195/642.08/1.60
4.06
1 3/4" Pipe
65/75-151/125
82.8%
211/172
81.5%
62.1/85.5
184/253
.737/.781
260/207
79.6%
76.5/103
227/305
.681/.705
293/224
76.5%
86.2/111
255/330
.614/.61
308/233
75.6%
90.6/116
269/343
.538/.529
----245/192
78.6%
1.58/3.64
.421/.324
AFR 210 Eliminator #1103 Chad Speier AlumN/A2.08/-
4.155
N/A-141/-200/-
58.9
174
.699
249/-
73.3
217
.652
285/-
83.9
249
.597
300/-
88.3
262
.524
294/-
86.5
256
.44
290/-
85.3
253
.38
--251
-
-
.421
AFR 210 Eliminator Dr Js Performance AlumN/A2.10/1.625
-
1 3/4" Pipe
N/A70/57
81.4%
147/112
76.2%
201/157
78.1%
58/75.7
172/224
.696/.702
245/190
77.6%
70.7/91.6
210/271
.636/.637
266/201
75.6%
76.8/96.9
228/287
.552/.539
267/206
77.2%
77.1/99.3
228/294
.462/.461
267/210
78.7%
77.1/101
228/300
.396/.402
---232/179
77.2%
-
.425/.329
AFR 210 Eliminator CNC Dr Js Performance AlumN/A2.10/1.625
-
1 3/4" Pipe
N/A76/58
76.3%
148/117
79.1%
203/165
81.3%
58.6/79.6
174/236
.703/.738
252/210
83.3%
72.8/101
216/300
.654/.704
286/234
81.8%
82.6/113
245/334
.594/.628
304/250
82.2%
87.8/121
260/357
.526/.559
315/258
81.9%
90.9/124
269/369
.467/.494
---251/206
81.8%
-
.425/.329
AFR 210 Race Old SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe
76-135/112
83%
197/145
73.6%
58/72.1
172/214
.688/.659
245/185
75.5%
72.1/92
214/273
.642/.63
273/205
75.1%
80.3/102
238/302
.572/.559
282/215
76.2%
83/107
246/317
.493/.488
285/220
77.2%
83.9/109
249/324
.427/.428
---236/180
76.4%
1.36/2.75
.421/.324
AFR 210 Race Old Meaux Racing AlumN/A2.08/1.60
-
No Pipe
N/A-140/110
78.6%
198/152
76.8%
58.3/75.6
173/224
.692/.69
247/178
72.1%
72.7/88.5
215/262
.647/.606
284/192
67.6%
83.6/95.5
248/283
.595/.523
289/197
68.2%
85.1/98
252/290
.505/.447
296/201
67.9%
87.1/100
258/296
.443/.391
294/203
69%
86.5/101
256/299
.385/.346
--250/176
70.5%
-
.421/.324
AFR 210 Race Old Ported Meaux Racing AlumN/A2.08/1.60
-
No Pipe
N/A-161/119
73.9%
218/159
72.9%
64.2/79.1
190/234
.762/.722
262/188
71.8%
77.1/93.5
228/277
.687/.64
293/203
69.3%
86.2/101
255/299
.614/.553
307/208
67.8%
90.3/103
268/307
.536/.472
312/213
68.3%
91.8/106
272/314
.467/.415
315/215
68.3%
92.7/107
275/317
.413/.366
316/216
68.4%
93/107
276/318
.368/.327
-273/190
69.6%
-
.421/.324
AFR 210 Street SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe
76-139/110
79.1%
199/158
79.4%
58.6/78.6
174/233
.695/.718
249/192
77.1%
73.3/95.5
217/283
.652/.654
279/210
75.3%
82.1/104
243/309
.585/.572
295/220
74.6%
86.8/109
257/324
.515/.50
301/224
74.4%
88.6/111
262/330
.451/.436
---244/186
76.2%
1.43/2.80
.421/.324
AFR 210 Comp SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe
76-147/120
81.6%
206/166
80.6%
60.6/82.6
180/245
.72/.754
257/214
83.3%
75.6/106
224/315
.673/.729
290/225
77.6%
85.3/112
253/332
.608/.613
308/235
76.3%
90.6/117
269/346
.538/.534
312/240
76.9%
91.8/119
272/354
.467/.467
---253/200
78.9%
1.49/3.00
.421/.324
AFR 210 CNC Meaux Racing Out of Box Alum210/802.08/1.60
4.00
No Pipe
N/A-130/115
88.5%
185/154
83.2%
54.4/76.6
161/227
.646/.699
233/182
78.1%
68.6/90.5
203/268
.611/.62
270/196
72.6%
79.5/97.5
235/289
.566/.534
280/205
73.2%
82.4/102
244/302
.489/.466
284/212
74.6%
83.6/105
248/312
.425/.413
283/216
76.3%
83.3/107
247/318
.371/.368
--238/183
76.9%
1.35/2.70
.421/.324
AFR 210 CNC Out of Box Alum210/802.08/1.60N/A-144/118
81.9%
202/167
82.7%
59.4/83.1
176/246
.706/.759
249/198
79.5%
73.3/98.5
217/292
.652/.675
278/207
74.5%
81.8/103
242/305
.583/.564
284/210
73.9%
83.6/104
248/309
.496/.477
280/212
75.7%
82.4/105
244/312
.419/.413
---240/185
77.4%
1.35/2.65
.421/.324
AFR 210 CNC Out of Box Weingartner Racing Alum210/-2.08/1.60
4.125
No Pipe
N/A70/55
78.6%
140/111
79.3%
199/150
75.4%
58.6/74.6
174/221
.695/.681
248/185
74.6%
73/92
216/273
.65/.63
276/206
74.6%
81.2/102
241/304
.579/.561
282/216
76.6%
83/107
246/318
.493/.491
291/221
75.9%
85.6/110
254/326
.436/.43
289/224
77.5%
85.1/111
252/330
.379/.382
--246/188
76.1%
1.39
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR 210 massaged Chad Speier Alum208/-2.08/1.612566-161/119
73.9%
218/159
72.9%
64.2/77.9
190/231
.762/.717
262/188
71.8%
77.1/92.1
228/273
.687/.635
293/203
69.3%
86.2/99.4
255/295
.614/.549
307/208
67.8%
90.3/102
268/302
.536/.469
312/213
68.3%
91.8/104
272/309
.467/.411
315/215
68.3%
92.7/105
275/312
.413/.363
316/216
68.4%
93/106
276/313
.368/.324
-273/190
69.6%
1.52
.421/.327
AFR 210 Race V2 SF600 Alum210/802.08/1.60
4.06
1 3/4" Pipe
65-75-145/110
75.9%
199/158
79.4%
58.6/78.6
174/233
.695/.718
255/192
75.3%
75/95.5
222/283
.668/.654
292/210
71.9%
85.9/104
255/309
.612/.572
309/220
71.2%
90.9/109
269/324
.54/.50
----240/178
74.2%
1.47/2.75
.421/.324
AFR 210 Comp V2 SF600 Alum210/802.08/1.60
4.06
1 3/4" Pipe
65-75-147/120
81.6%
201/166
82.6%
59.2/82.6
175/245
.702/.754
257/214
83.3%
75.6/106
224/315
.673/.729
296/225
76%
87.1/112
258/332
.621/.613
318/235
73.9%
93.6/117
277/346
.556/.534
----244/192
78.8%
1.51/2.94
.421/.324
AFR 220 Race SF600 Alum220/802.08/1.60
4.125
1 7/8" Pipe
76-132/112
84.8%
190/145
76.3%
55.9/72.1
166/214
.664/.659
248/185
74.6%
73/92
216/273
.65/.63
280/205
73.2%
82.4/102
244/302
.587/.559
286/215
75.2%
84.2/107
249/317
.50/.488
292/220
75.3%
85.9/109
255/324
.437/.428
---238/180
75.8%
1.33/2.75
.421/.324
AFR 220 Comp SF600 Alum220/802.08/1.60
4.125
1 7/8" Pipe
76-135/112
83%
198/150
75.8%
58.3/74.6
173/221
.692/.681
255/190
74.5%
75/94.5
222/280
.668/.647
290/207
71.4%
85.3/103
253/305
.608/.564
298/220
73.8%
87.7/109
260/324
.521/.50
303/230
75.9%
89.2/114
264/339
.454/.448
---247/185
75%
1.38/2.88
.421/.324
AFR 220 Eliminator Comp SF600 Alum220/-2.10/1.6065-150/126
84%
207/178
86%
59.8/88.5
177/262
.716/.808
260/215
82.7%
75.1/107
222/317
.675/.732
296/236
79.7%
85.5/117
253/348
.615/.643
322/247
76.7%
93/123
275/364
.557/.561
331/251
75.8%
95.6/125
283/370
.491/.489
---261/209
80%
1.50
.425/.324
AFR 220 Eliminator Comp Out of Box Meaux Racing SF600 Alum220/-2.10/1.60
4.125
No Pipe
N/A-145/117
80.7%
195/171
87.7%
56.3/85
167/252
.675/.777
244/207
84.8%
70.4/103
209/305
.633/.705
283/223
78.8%
81.7/111
242/329
.588/.608
303/230
75.9%
87.5/114
259/339
.524/.522
304/233
76.6%
87.8/116
260/343
.451/.454
303/235
77.6%
87.5/117
259/346
.393/.40
--254/202
79.7%
1.38
.425/.324
AFR 220 Eliminator Race Alum220/-2.10/1.60
4.125
1 7/8" Pipe
65-75-155/116
74.8%
210/162
77.1%
60.6/80.6
180/239
.727/.736
260/204
78.5%
75.1/101
222/301
.675/.695
295/220
74.6%
85.2/109
252/324
.613/.60
312/229
73.4%
90.1/114
267/337
.54/.52
----246/186
75.6%
1.42
.425/.324
AFR 220 Eliminator Comp Alum220/-2.10/1.60
4.125
1 7/8" Pipe
65-75-145/120
82.8%
207/166
80.2%
59.8/82.6
177/245
.716/.754
263/214
81.4%
75.9/106
225/315
.683/.729
299/225
75.3%
86.3/112
256/332
.621/.613
324/240
74.1%
93.5/119
277/354
.561/.545
329/245
74.5%
95/122
281/361
.488/.477
---261/202
77.2%
1.50
.425/.324
AFR 227 Race Old SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
N/A-135/112
83%
192/145
75.5%
55.4/72.1
164/214
.664/.659
250/185
74%
72.2/92
214/273
.649/.63
288/205
71.2%
83.2/102
246/302
.598/.559
292/215
73.6%
84.3/107
250/317
.505/.488
295/220
74.6%
85.2/109
252/324
.438/.428
---242/180
74.5%
1.30/2.75
.425/.324
AFR 227 Comp Old SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
N/A-138/112
81.2%
207/150
72.5%
59.8/74.6
177/221
.716/.681
258/190
73.6%
74.5/94.5
221/280
.67/.647
294/207
70.4%
84.9/103
252/305
.61/.564
302/220
72.8%
87.2/109
258/324
.523/.50
309/230
74.4%
89.2/114
264/339
.458/.448
---251/185
73.5%
1.36/2.88
.425/.324
AFR 227 Street 60/40 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
N/A-148/114
77%
210/162
77.1%
60.6/80.6
180/239
.727/.736
259/204
78.8%
74.8/101
222/301
.672/.695
292/220
75.3%
84.3/109
250/324
.606/.60
305/229
75.1%
88.1/114
261/337
.528/.52
----243/186
76.5%
1.34/2.86
.425/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR 227 Comp 60/40 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
N/A-153/120
78.4%
214/167
78%
61.8/83.1
183/246
.741/.759
265/214
80.8%
76.5/106
227/315
.688/.729
298/230
77.2%
86/114
255/339
.619/.627
315/238
75.6%
90.9/118
269/351
.545/.541
----249/194
77.8%
1.39/2.98
.425/.324
AFR 227 Comp 60/40 Out of Box AlumN/A2.10/1.60
-
No Pipe
N/A-154/114
74%
208/165
79.3%
60.1/82.1
178/243
.72/.749
264/205
77.7%
76.2/102
226/302
.685/.698
304/223
73.4%
87.8/111
260/329
.631/.608
325/232
71.4%
93.8/115
278/342
.562/.527
----251/188
74.8%
-
.425/.324
AFR 227 Eliminator CNC Out of Box Weingartner Racing Alum210/-2.10/1.60
4.125
No Pipe
N/A75/61
81.3%
160/123
76.9%
217/170
78.3%
62.7/84.6
186/251
.751/.772
269/208
77.3%
77.7/103
230/307
.698/.709
303/220
72.6%
87.5/109
259/324
.629/.60
322/227
70.5%
93/113
275/335
.557/.516
321/233
72.6%
92.7/116
275/343
.476/.454
322/234
72.7%
93/116
275/345
.418/.399
--273/202
73.9%
1.53
.425/.324
AFR 227 Street 60/40 V2 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
65-75-148/114
77%
210/162
77.1%
60.6/80.6
180/239
.727/.736
261/204
78.2%
75.4/101
223/301
.677/.695
296/220
74.3%
85.5/109
253/324
.615/.60
312/229
73.4%
90.1/114
267/337
.54/.52
318/237
74.5%
91.8/118
272/349
.472/.461
---258/194
75.5%
1.40/2.96
.425/.324
AFR 227 Comp 60/40 V2 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
65-75-152/120
78.9%
212/167
78.8%
61.2/83.1
181/246
.734/.759
265/214
80.8%
76.5/106
227/315
.688/.729
300/230
76.7%
86.6/114
257/339
.623/.627
319/238
74.6%
92.1/118
273/351
.552/.541
327/243
74.3%
94.4/121
280/358
.485/.473
---263/202
77%
1.44/3.04
.425/.324
AFR 235 Eliminator CNC 60/40 SF600 Alum235/-2.125/1.60
4.125
1 7/8" Pipe
70-80-159/120
75.5%
221/175
79.2%
62.3/87
185/258
.756/.795
270/214
79.3%
76.1/106
226/315
.693/.729
305/235
77%
86/117
255/346
.626/.64
324/247
76.2%
91.4/123
271/364
.554/.561
334/254
76%
94.2/126
279/374
.49/.494
340/256
75.3%
95.9/127
284/377
.436/.436
--279/214
76.9%
1.45
.430/.324
AFR 235 Eliminator CNC Out of Box Weingartner Racing Alum235/-2.125/1.60
4.125
No Pipe
7079/58
73.4%
169/117
69.2%
236/172
72.9%
66.5/85.5
197/253
.807/.781
274/205
74.8%
77.3/102
229/302
.703/.698
306/221
72.2%
86.3/110
256/326
.628/.602
322/231
71.7%
90.8/115
269/340
.551/.525
333/237
71.2%
93.9/118
278/349
.488/.461
339/241
71.1%
95.6/120
283/355
.435/.41
341/245
71.8%
96.1/122
285/361
.389/.371
-290/209
71.9%
1.45
.430/.324
AFR 235 Out of Box Dr Js Perfomance Alum235/-2.125/1.60
4.155
7066/-144/-209/-
58.9
175
.715
259/-
73
216
.664
290/-
81.8
242
.595
312/-
88
261
.534
323/-
91.1
270
.473
329/-
92.8
275
.422
327/-
92.2
273
.373
319/-
89.9
267
.327
279
-
1.40
.430/.324
AFR 235 Out of Box CHW Alum235/-2.125/1.60
-
No Pipe
N/A72/58
80.6%
162/110
67.9%
216/167
77.3%
60.9/83.1
180/246
.739/.759
260/185
71.2%
73.3/92
217/273
.667/.63
292/205
70.2%
82.3/102
244/302
.599/.559
308/216
70.1%
86.8/107
257/318
.527/.491
319/221
69.3%
89.9/110
267/326
.468/.43
327/224
68.5%
92.2/111
273/330
.419/.382
--269/190
70.5%
1.39
.430/.324
AFR 23 Deg 215 RR SF600 Alum215/802.10/1.60
4.125
1 7/8" Pipe
76-150/112
74.7%
220/150
68.2%
63.5/74.6
188/221
.761/.681
276/190
68.8%
79.7/94.5
236/280
.716/.647
308/207
67.2%
88.9/103
263/305
.64/.564
315/220
69.8%
90.9/109
269/324
.545/.50
325/230
70.8%
93.8/114
278/339
.482/.448
---266/185
69.6%
1.51/2.88
.425/.324
AFR 245 CNC Alum245/-2.125/1.60N/A-165/120
72.7%
232/175
75.4%
65.4/87
194/258
.793/.795
278/214
77%
78.4/106
232/315
.713/.729
310/235
75.8%
87.4/117
259/346
.636/.64
330/247
74.8%
93/123
276/364
.564/.561
341/252
73.9%
96.1/125
285/371
.50/.491
---276/207
75.1%
1.39
.430/.324
AFR 245 Eliminator CNC Alum245/-2.125/1.60
4.125
1 7/8" Pipe
70-80-165/128
77.6%
232/181
78%
65.4/90
194/267
.793/.822
278/214
77%
78.4/106
232/315
.713/.729
310/235
75.8%
87.4/117
259/346
.636/.64
330/247
74.8%
93/123
276/364
.564/.561
341/254
74.5%
96.1/126
285/374
.50/.494
350/256
73.1%
98.7/127
292/377
.449/.436
--287/216
75.5%
1.43
.430/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR 18 Deg GM SF600243/100-65-147/109
74.1%
219/160
73.1%
-
273/204
74.7%
-
319/230
72.1%
-
329/246
74.8%
-
340/255
75%
-
---271/201
74%
1.40/2.55
AFR 285 15 Deg Alum285/-2.16/1.6050-53-----------
-
-
.437/.324
AFR 305 15 Deg I-55 E-55 Alum305/-2.20/1.6050-53-----------
-
-
.446/.324
AFR 325 13.5 Deg Alum325/-2.236/1.595
-
1 7/8" Pipe
50-141/114
80.9%
211/160
75.8%
53.7/80.1
159/237
.686/.729
286/196
68.5%
72.8/98.1
216/291
.697/.67
347/225
64.8%
88.4/113
262/334
.677/.615
398/253
63.6%
101/127
300/375
.647/.576
438/276
63%
112/138
330/409
.61/.539
452/298
65.9%
115/149
341/442
.551/.509
453/309
68.2%
115/155
342/458
.491/.469
-341/229
67.2%
1.39
.453/.323
AJPE 23 Deg 250250/-2.15/1.525
4.03
No Pipe
54-148/106
71.6%
221/153
69.2%
60.9/83.8
180/248
.747/.729
281/193
68.7%
77.4/106
229/313
.712/.69
318/223
70.1%
87.6/122
260/362
.645/.638
328/232
70.7%
90.3/127
268/376
.554/.553
336/238
70.8%
92.5/130
274/386
.487/.486
347/-
95.6
283
.44
--283/191
-
1.39
.435/.309
AJPE 23 Deg 283283/-2.18/1.60
4.125
No Pipe
61-142/103
72.5%
221/143
64.7%
59.2/71.1
175/211
.737/.65
281/205
73%
75.3/102
223/302
.703/.698
325/222
68.3%
87.1/110
258/327
.65/.605
347/230
66.3%
93/114
275/339
.578/.522
364/238
65.4%
97.5/118
289/351
.52/.463
369/248
67.2%
98.9/123
293/365
.461/.422
374/-
100
297
.416
-303/198
-
1.32
.441/.324
AJPE 18 Deg 250250/-2.125/1.60
4.03
No Pipe
N/A-145/114
78.6%
216/164
75.9%
60.9/81.6
180/242
.739/.745
267/217
81.3%
75.3/108
223/320
.685/.739
303/243
80.2%
85.4/121
253/358
.622/.662
325/251
77.2%
91.6/125
272/370
.556/.57
336/255
75.9%
94.7/127
281/376
.492/.496
---265/207
78.1%
1.34
.430/.324
AJPE 18 Deg 270270/-2.18/1.60
4.125
No Pipe
N/A-148/114
77%
225/164
72.9%
60.3/81.6
179/242
.75/.745
275/217
78.9%
73.7/108
218/320
.688/.739
314/243
77.4%
84.1/121
249/358
.628/.662
352/251
71.3%
94.3/125
279/370
.587/.57
356/255
71.6%
95.4/127
283/376
.509/.496
---278/207
74.5%
1.32
.441/.324
AJPE 18 Deg 279279/-2.20/1.625
4.125
No Pipe
N/A-143/111
77.6%
223/166
74.4%
58.7/80
174/237
.737/.742
278/225
80.9%
73.1/108
217/321
.689/.755
319/245
76.8%
83.9/118
249/350
.632/.657
353/255
72.2%
92.9/123
275/364
.583/.57
368/260
70.7%
96.8/125
287/371
.521/.498
---281/210
74.9%
1.32
.446/.329
AJPE 12 Deg 280 Weingarter Racing Brez280/-2.10/1.625
4.155
No Pipe
N/A68/46
67.6%
129/78
60.5%
201/123
61.2%
58/59.3
172/176
.696/.55
272/167
61.4%
78.5/80.5
233/239
.706/.56
323/195
60.4%
93.3/94
276/279
.671/.523
354/216
61%
102/104
303/309
.613/.483
358/231
64.5%
103/111
306/330
.531/.443
359/240
66.9%
104/116
307/343
.466/.402
--285/179
62.6%
1.28
.425/.329
AJPE 13 Deg Canted Valves Billet344/1142.25/1.65
4.125
2.1" Pipe
53-125/105
84%
196/159
81.1%
49.3/74.4
146/220
.633/.70
268/216
80.6%
67.4/101
200/299
.649/.714
326/255
78.2%
82/119
243/353
.632/.674
375/284
75.7%
94.3/133
279/394
.606/.625
410/305
74.4%
103/143
306/423
.568/.576
420/319
76%
106/149
313/442
.509/.527
--303/235
77.5%
1.22/2.80
.456/.334
All PRO II-13 Ported Jones Engineering AlumN/A2.20/1.625N/A-165/124
75.2%
245/204
83.3%
64.5/98.4
191/291
.809/.912
299/248
82.9%
78.7/120
233/354
.741/.832
343/272
79.3%
90.2/131
267/389
.68/.73
364/278
76.4%
95.8/134
284/397
.601/.622
386/292
75.6%
102/141
301/417
.546/.56
---300/236
78.7%
-
.446/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
All PRO RE-13 Ported Jones Engineering AlumN/A2.20/1.62547-146/110
75.3%
221/161
72.9%
58.1/77.6
172/230
.73/.72
291/216
74.2%
76.6/104
227/309
.721/.724
348/239
68.7%
91.5/115
271/341
.69/.641
388/248
63.9%
102/120
302/354
.641/.555
408/251
61.5%
107/121
318/359
.578/.481
409/253
61.9%
108/122
319/361
.507/.424
--316/211
66.8%
-
.446/.329
All PRO RE-13 Ported Jones Engineering AlumN/A2.20/1.62547-136/101
74.3%
222/154
69.4%
58.4/74.3
173/220
.733/.689
295/209
70.8%
77.6/101
230/299
.731/.701
354/239
67.5%
93.1/115
276/341
.702/.641
395/257
65.1%
104/124
308/367
.652/.575
415/266
64.1%
109/128
323/380
.588/.51
422/273
64.7%
111/132
329/390
.523/.458
428/277
64.7%
113/134
334/396
.471/.413
-333/222
66.6%
-
.446/.329
All PRO RE-18 Ported Rons Porting Servive Alum274/-2.15/1.62542-57-165/128
77.6%
239/183
76.6%
65.8/88.2
195/261
.808/.818
290/236
81.4%
79.9/114
237/337
.735/.792
318/268
84.3%
87.6/129
260/383
.645/.719
341/274
80.4%
93.9/132
278/391
.576/.613
354/280
79.1%
97.5/135
289/400
.513/.537
---285/228
80.2%
1.29
.435/.329
All PRO RE-15 Ported AlumN/A2.19/1.60N/A-164/128
78%
228/211
92.5%
60.5/105
179/311
.757/.958
281/247
87.9%
74.6/123
221/364
.699/.841
327/268
82%
86.8/133
257/395
.651/.73
353/278
78.8%
93.7/138
278/410
.586/.631
369/282
76.4%
98/140
290/416
.525/.549
---287/236
82.1%
-
.443/.324
All PRO LM-13 Deg Ported Alum270/-2.18/1.6035-50-155/120
77.4%
232/180
77.6%
62.2/89.5
184/265
.773/.818
296/230
77.7%
79.3/114
235/339
.74/.784
340/246
72.4%
91.1/122
270/363
.68/.67
362/255
70.4%
97/127
287/376
.603/.579
372/263
70.7%
99.7/131
295/388
.531/.512
---293/216
73.6%
1.38
.441/.324
All PRO LM-13 Deg Ported Alum278/-2.18/1.62535-50-150/124
82.7%
232/204
87.9%
62.2/98.4
184/291
.773/.912
298/248
83.2%
79.8/120
237/354
.745/.832
342/272
79.5%
91.6/131
271/389
.684/.73
367/278
75.7%
98.3/134
291/397
.612/.622
378/292
77.2%
101/141
300/417
.54/.56
---295/236
80.2%
1.36
.441/.329
All PRO 13 Deg CNC MBE Sprint Car AlumN/A-N/A68/47
69.1%
135/96
71.1%
211/152
72%
-
290/202
69.7%
-
344/239
69.5%
-
382/259
67.8%
-
397/271
68.3%
-
406/278
68.5%
-
413/280
67.8%
-
420/281
66.9%
-
333/229
68.6%
All PRO 13 Deg CNC Jones Engineering Alum282/-2.18/1.62547-147/112
76.2%
232/164
70.7%
62.2/79.1
184/234
.773/.733
306/223
72.9%
82/108
243/319
.765/.748
351/246
70.1%
94/119
279/351
.702/.66
386/252
65.3%
103/122
306/360
.643/.563
392/258
65.8%
105/124
311/369
.56/.494
---302/209
69.2%
1.39
.441/.329
All PRO 13 Deg CNC Jones Engineering Alum292/-2.20/1.6047-150/113
75.3%
228/164
71.9%
60/81.6
178/242
.753/.745
290/219
75.5%
76.3/109
226/323
.718/.746
339/246
72.6%
89.2/122
264/363
.672/.67
374/256
68.4%
98.4/127
292/377
.618/.581
391/262
67%
103/130
305/386
.554/.51
396/266
67.2%
104/132
309/392
.491/.453
--310/218
70.4%
1.36
.446/.324
All PRO 305-4 13 Ported Alum305/-2.25/1.60N/A-159/115
72.3%
223/192
86.1%
56.1/95.5
166/283
.72/.872
284/239
84.2%
71.4/119
212/352
.688/.814
343/261
76.1%
86.3/130
256/385
.665/.711
382/275
72%
96.1/137
285/405
.617/.625
404/283
70%
102/141
301/417
.559/.551
414/287
69.3%
104/143
309/423
.501/.489
--316/236
74.8%
1.36
.456/.324
All PRO 13.5 Deg CNC Jones Engineering 75/135 Alum306/-2.23/1.6049-148/117
79.1%
231/169
73.2%
59.1/84.1
175/249
.753/.768
297/218
73.4%
76/108
225/321
.726/.743
346/246
71.1%
88.6/122
262/363
.677/.67
378/258
68.3%
96.8/128
287/380
.616/.586
392/265
67.6%
100/132
297/391
.547/.516
---299/212
71%
1.28
.452/.324
All PRO 13.5 Deg CNC Jones Engineering 95/150 Alum306/-2.23/1.6049-138/117
84.8%
213/169
79.3%
54.5/84.1
162/249
.694/.768
279/218
78.1%
71.4/108
212/321
.682/.743
333/246
73.9%
85.3/122
253/363
.651/.67
383/258
67.4%
98.1/128
291/380
.624/.586
410/265
64.6%
105/132
311/391
.573/.516
418/268
64.1%
107/133
317/395
.511/.456
--311/220
70.9%
1.37
.452/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
All PRO 272 22 Deg Ported Jones Engineering Alum278/-2.18/1.6068-149/118
79.2%
217/172
79.3%
58.1/85.5
172/253
.723/.781
276/221
80.1%
73.9/110
219/326
.69/.753
321/239
74.5%
86/119
255/352
.642/.651
357/246
68.9%
95.6/122
283/363
.595/.559
371/251
67.7%
99.4/125
295/370
.53/.489
---282/208
73.7%
1.33
.441/.324
All PRO 23 Deg Ported Alum219/-2.10/1.6060-74-151/109
72.2%
219/165
75.3%
63.2/82.1
187/243
.758/.749
266/221
83.1%
76.8/110
228/326
.69/.753
288/243
84.4%
83.2/121
246/358
.598/.662
308/250
81.2%
88.9/124
263/368
.533/.568
314/253
80.6%
90.7/126
269/373
.466/.492
---258/207
80.3%
1.43
.425/.324
All PRO 23 Deg Ported Jones Engineering Alum242/-2.125/1.6070-156/108
69.2%
210/169
80.5%
59.2/84.1
175/249
.718/.768
266/216
81.2%
75/107
222/318
.682/.736
311/230
74%
87.7/114
260/339
.638/.627
333/238
71.5%
93.9/118
278/351
.569/.541
340/243
71.5%
95.9/121
284/358
.498/.473
---269/201
74.5%
1.40
.430/.324
All PRO 23 Deg Ported Kelford Cams 360 SprintCar AlumN/A2.125/1.625N/A88/47
53.4%
162/104
64.2%
224/158
70.5%
63.2/76.2
187/226
.766/.707
268/222
82.8%
75.6/107
224/317
.687/.745
300/239
79.7%
84.6/115
251/341
.616/.641
324/247
76.2%
91.4/119
271/353
.554/.552
331/255
77%
93.3/123
277/364
.485/.489
---268/204
76.1%
-
.430/.329
All PRO 23 Deg Ported Rons Porting Service Alum245/-2.18/1.62574-153/123
80.4%
212/172
81.1%
56.8/82.9
168/246
.707/.769
272/210
77.2%
72.9/101
216/300
.68/.704
322/239
74.2%
86.3/115
256/341
.644/.641
358/251
70.1%
95.9/121
284/359
.597/.561
379/258
68.1%
102/124
301/369
.541/.494
382/261
68.3%
102/126
303/373
.478/.438
--297/216
72.9%
1.56
.441/.329
All PRO 23 Deg Rolled to 16.8 Deg Ported BES Alum288/-2.18/1.62543.5-114/91
79.8%
205/176
85.9%
54.9/84.9
163/251
.683/.787
268/233
86.9%
71.8/112
213/333
.67/.782
314/262
83.4%
84.1/126
249/374
.628/.703
353/286
81%
94.6/138
280/409
.588/.64
374/302
80.7%
100/146
297/431
.534/.579
381/311
81.6%
102/150
302/444
.476/.522
381/317
83.2%
102/153
302/453
.423/.473
-299/247
82.8%
1.32
.441/.329
All PRO 23 Deg RR 245 Ported BES AlumN/A2.18/1.625
4.155
N/A-122/112
91.8%
187/165
88.2%
50.1/79.6
148/236
.623/.738
250/218
87.2%
67/105
198/311
.625/.731
301/248
82.4%
80.6/120
239/354
.602/.665
339/264
77.9%
90.8/127
269/377
.565/.59
362/274
75.7%
97/132
287/391
.517/.525
368/279
75.8%
98.6/135
292/399
.46/.468
371/280
75.5%
99.4/135
295/400
.412/.417
-288/230
80%
-
.441/.329
Avenger 180 23 Deg Alum180/722.02/1.6060/6864/60
93.8%
128/110
85.9%
178/150
84.3%
55.5/74.6
165/221
.64/.681
227/188
82.8%
70.8/93.5
210/277
.613/.64
258/204
79.1%
80.5/101
239/301
.557/.556
270/215
79.6%
84.3/107
250/317
.486/.488
270/215
79.6%
84.3/107
250/317
.416/.419
270/215
79.6%
84.3/107
250/317
.364/.366
--229/185
81%
1.50/2.99
.409/.324
Avenger 190 23 Deg Alum190/-2.02/1.6060/6764/61
95.3%
128/115
89.8%
181/150
82.9%
56.5/74.6
167/221
.651/.681
227/190
83.7%
70.8/94.5
210/280
.613/.647
260/209
80.4%
81.1/104
240/308
.561/.57
277/227
81.9%
86.4/113
256/335
.498/.516
280/231
82.5%
87.4/115
259/340
.432/.45
280/231
82.5%
87.4/115
259/340
.378/.393
--233/193
82.9%
1.47
.409/.324
Avenger 210 23 Deg Alum210/802.055/1.6060/6769/61
88.4%
139/115
82.7%
194/150
77.3%
58.5/74.6
173/221
.686/.681
240/190
79.2%
72.4/94.5
214/280
.637/.647
277/209
75.5%
83.5/104
247/308
.588/.57
299/227
75.9%
90.1/113
267/335
.529/.516
304/234
77%
91.7/116
272/345
.461/.456
304/234
77%
91.7/116
272/345
.403/.399
--251/194
77.3%
1.45/2.93
.416/.324
Avenger 15 Deg Alum290/902.18/1.6061/6979/62
78.5%
159/120
75.5%
223/167
74.9%
59.7/83.1
177/246
.743/.759
290/218
75.2%
77.7/108
230/321
.725/.743
335/232
69.3%
89.8/115
266/342
.67/.632
361/240
66.5%
96.7/119
287/354
.602/.545
372/248
66.7%
99.7/123
295/365
.531/.483
381/255
66.9%
102/127
302/376
.476/.434
--303/211
69.8%
1.31/2.83
.441/.324
BMF 18 Deg 238 CNC Alum238/902.15/1.6066--241/178
73.9%
66.4/88.5
197/262
.815/.808
299/223
74.6%
82.4/111
244/329
.758/.76
340/236
69.4%
93.7/117
277/348
.69/.643
348/243
69.8%
95.9/121
284/358
.588/.552
350/247
70.6%
96.4/123
286/364
.507/.481
351/250
71.2%
96.7/124
286/368
.445/.426
353/251
71.1%
97.2/125
288/370
.398/.38
-326/233
71.3%
1.48/2.79
.435/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
BMF 18 Deg 248 CNC Alum248/902.15/1.6066--239/178
74.5%
65.8/88.5
195/262
.808/.808
302/223
73.8%
83.2/111
246/329
.766/.76
344/236
68.6%
94.8/117
281/348
.698/.643
352/243
69%
97/121
287/358
.595/.552
362/247
68.2%
99.7/123
295/364
.524/.481
365/250
68.5%
101/124
298/368
.463/.426
365/251
68.8%
101/125
298/370
.411/.38
-333/233
69.9%
1.47/2.79
.435/.324
BMF 18 Deg 260 CNC Alum260/902.15/1.6066--242/178
73.6%
66.7/88.5
198/262
.818/.808
300/223
74.3%
82.6/111
245/329
.761/.76
342/236
69%
94.2/117
279/348
.694/.643
361/243
67.3%
99.4/121
295/358
.61/.552
369/247
66.9%
102/123
301/364
.535/.481
370/250
67.6%
102/124
302/368
.469/.426
370/251
67.8%
102/125
302/370
.417/.38
-336/233
69.2%
1.42/2.79
.435/.324
BMF 18 Deg CNC OLD Alum268/902.18/1.60N/A-145/131
90.3%
208/177
85.1%
55.7/88
165/261
.693/.804
266/215
80.8%
71.3/107
211/317
.665/.732
313/242
77.3%
83.9/120
248/357
.626/.66
338/253
74.9%
90.6/126
268/373
.563/.575
351/260
74.1%
94/129
279/383
.501/.506
368/262
71.2%
98.6/130
292/386
.46/.446
--284/220
77.4%
1.37/2.91
.441/.324
BMF 18 Deg 268 CNC Alum268/902.18/1.6066--242/178
73.6%
64.8/88.5
192/262
.807/.808
300/223
74.3%
80.4/111
238/329
.75/.76
342/236
69%
91.6/117
271/348
.684/.643
369/243
65.9%
98.9/121
293/358
.615/.552
375/247
65.9%
100/123
298/364
.536/.481
379/250
66%
102/124
301/368
.474/.426
382/251
65.7%
102/125
303/370
.424/.38
-341/233
68.1%
1.43/2.79
.441/.324
BMF 18 Deg 268 CNC Out of Box Meaux Racing SF600 Alum268/902.18/1.60
4.125
No Pipe
N/A-149/111
74.5%
218/158
72.5%
58.4/78.6
173/233
.727/.718
272/199
73.2%
72.9/99
216/293
.68/.678
317/229
72.2%
84.9/114
252/337
.634/.624
337/241
71.5%
90.3/120
268/355
.562/.547
339/-
90.8
269
.484
343/-
91.9
272
.429
349/265
75.9%
93.5/132
277/391
.388/.401
-291/201
-
1.30/2.94
.441/.324
BMF SBX 4.5 Bore CNC Darin Morgan SF600 AlumN/A2.30/1.65
-
No Pipe
N/A-159/-244/-
58.7
174
.771
319/-
76.8
227
.756
386/-
92.9
275
.732
432/-
104
308
.682
447/-
108
319
.605
463/-
111
330
.549
469/-
113
334
.494
478/-
115
341
.453
377
-
-
.466/.334
Brodix CARB Legal Alum170/-2.02/1.6067-132/93
70.5%
185/134
72.4%
57.7/66.6
171/197
.666/.609
217/159
73.3%
67.7/79.1
201/234
.586/.542
215/174
80.9%
67.1/86.5
199/256
.464/.474
212/180
84.9%
66.2/89.5
196/265
.381/.409
----192/148
77%
1.28
.409/.324
Brodix 305 Sprint Race Saver Ported Smithberg RacingN/A1.94/1.60
3.91
No Pipe
N/A77/52
67.5%
151/95
62.9%
203/132
65%
68.7/65.7
203/195
.76/.60
219/160
73.1%
74.1/79.6
220/236
.615/.545
234/176
75.2%
79.2/87.5
235/259
.526/.48
239/184
77%
80.9/91.5
240/271
.448/.418
----209/149
71.4%
-
.393/.324
Brodix SP CH Alum215/-2.08/1.6067-121/92
76%
176/134
76.1%
51.8/66.6
153/197
.615/.609
223/158
70.9%
65.6/78.6
194/233
.584/.538
249/172
69.1%
73.3/85.5
217/253
.522/.469
261/179
68.6%
76.8/89
228/264
.456/.407
269/182
67.7%
79.2/90.5
235/268
.403/.354
---217/153
70.6%
1.25
.421/.324
Brodix DS 225 23 Deg Alum225/-2.08/1.60N/A-142/115
81%
212/154
72.6%
62.4/76.6
185/227
.741/.699
260/183
70.4%
76.5/91
227/270
.681/.623
287/199
69.3%
84.5/99
250/293
.602/.542
302/204
67.5%
88.9/101
263/301
.528/.463
304/210
69.1%
89.5/104
265/309
.455/.409
---251/178
70.7%
1.35
.421/.324
Brodix BP HH 23 Deg 40/60 I-50 E-45 Alum229/-2.125/1.6068-139/122
87.8%
205/166
81%
57.8/82.6
171/245
.701/.754
257/200
77.8%
72.5/99.5
215/295
.659/.681
300/219
73%
84.6/109
251/323
.616/.597
319/227
71.2%
89.9/113
267/335
.545/.516
325/236
72.6%
91.6/117
272/348
.476/.459
---258/195
75.7%
1.42
.430/.324
Brodix BP HH RO 225 23 Deg 40/60 I-52 E-55 Alum225/-2.15/1.57N/A-142/103
72.5%
205/143
69.8%
56.5/73.9
167/219
.693/.662
259/182
70.3%
71.3/94
211/279
.657/.632
303/206
68%
83.5/106
247/315
.615/.572
327/222
67.9%
90.1/115
267/340
.553/.514
335/238
71%
92.3/123
273/364
.485/.472
---262/182
69.6%
1.49
.435/.318
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix BP HH RO 234 23 Deg 40/60 I-52 E-55 Alum234/-2.15/1.57N/A-130/103
79.2%
199/143
71.9%
54.8/73.9
162/219
.673/.662
258/182
70.5%
71.1/94
211/279
.654/.632
305/206
67.5%
84/106
249/315
.619/.572
332/222
66.9%
91.4/115
271/340
.561/.514
345/238
69%
95/123
282/364
.50/.472
---262/182
69.7%
1.47
.435/.318
Brodix HH 234 Out of Box Weingartner Racing Alum234/-2.15/1.57
4.155
No Pipe
N/A-132/95
72%
186/134
72%
51.2/69.2
152/205
.629/.62
248/176
71%
68.3/90.9
202/269
.629/.611
293/204
69.6%
80.7/105
239/312
.594/.567
318/219
68.9%
87.6/113
260/335
.537/.507
339/229
67.6%
93.4/118
277/350
.491/.454
338/235
69.5%
93.1/121
276/360
.428/.408
335/238
71%
92.3/123
273/364
.377/.367
335/-
92.3
273
.34
280/191
-
1.45
.435/.318
Brodix -8 STD FSH CARB Legal Alum185/-2.08/1.6067-134/106
79.1%
191/135
70.7%
56.2/67.1
167/199
.667/.613
229/152
66.4%
67.4/75.6
200/224
.60/.518
233/159
68.2%
68.6/79.1
203/234
.488/.433
-----197/138
70.1%
1.26
.421/.324
Brodix -8 STD or SP 23 Deg Alum194/-2.08/1.60
-
No Pipe
67-134/109
81.3%
191/138
72.3%
56.2/68.6
167/203
.667/.627
230/155
67.4%
67.7/77.1
201/228
.603/.528
240/161
67.1%
70.6/80.1
209/237
.503/.439
-----199/141
70.8%
1.24
.421/.324
Brodix -8 PRO 23 Deg Alum185/-2.02/1.60
-
No Pipe
67-134/106
79.1%
191/135
70.7%
59.6/67.1
177/199
.687/.613
230/153
66.5%
71.8/76.1
213/225
.621/.521
240/160
66.7%
74.9/79.6
222/236
.518/.436
-----199/139
69.7%
1.30
.409/.324
Brodix -8 STD 23 Deg Ported ET Performance Alum215/-2.08/1.60
4.155
7369/53
76.8%
136/92
67.6%
198/175
88.4%
58.3/87
173/258
.692/.795
248/207
83.5%
73/103
216/305
.65/.705
283/227
80.2%
83.3/113
247/335
.593/.619
287/237
82.6%
84.5/118
250/349
.501/.538
290/240
82.8%
85.3/119
253/354
.434/.467
---240/196
81.7%
1.35
.421/.324
Brodix -10 STD or SP 23 Deg Alum210/-2.08/1.6067-145/109
75.2%
195/139
71.3%
57.4/69.1
170/205
.681/.631
240/155
64.6%
70.6/77.1
209/228
.629/.528
253/161
63.6%
74.5/80.1
221/237
.53/.439
262/166
63.4%
77.1/82.6
228/245
.458/.377
262/168
64.1%
77.1/83.6
228/248
.392/.327
---226/150
66.2%
1.25
.421/.324
Brodix -10 WP SP RI 23 Deg Jones Engineering 40/60 I-45 E-45 Alum240/-2.125/1.6071-151/114
75.5%
223/156
70%
62.9/77.6
186/230
.763/.709
273/207
75.8%
77/103
228/305
.70/.705
304/230
75.7%
85.7/114
254/339
.624/.627
324/240
74.1%
91.4/119
271/354
.554/.545
332/245
73.8%
93.6/122
277/361
.487/.477
---268/199
74.2%
1.38
.430/.324
Brodix -10 WP SP X - 231 23 Deg Alum231/-2.10/1.6069-152/115
75.7%
222/167
75.2%
64.1/83.1
190/246
.768/.759
268/210
78.4%
77.4/104
229/309
.696/.715
297/227
76.4%
85.7/113
254/335
.617/.619
313/230
73.5%
90.4/114
268/339
.542/.522
320/234
73.1%
92.4/116
274/345
.475/.456
---262/197
75.3%
1.39
.425/.324
Brodix -10 WP SP X - 233 23 Deg Alum233/-2.125/1.6074-151/115
76.2%
223/167
74.9%
62.9/83.1
186/246
.763/.759
269/210
78.1%
75.8/104
225/309
.69/.715
300/227
75.7%
84.6/113
251/335
.616/.619
318/230
72.3%
89.7/114
266/339
.544/.522
329/234
71.1%
92.8/116
275/345
.482/.456
---265/197
74.4%
1.41
.430/.324
Brodix -10 WP SP X AP 23 Deg Alum230/-2.125/1.6065-156/107
68.6%
218/155
71.1%
61.5/77.1
182/228
.746/.704
271/194
71.6%
76.4/96.5
226/286
.695/.661
309/239
77.3%
87.1/119
258/352
.634/.651
336/251
74.7%
94.7/125
281/370
.575/.57
352/258
73.3%
99.3/128
294/380
.516/.502
---274/201
73.3%
1.53
.430/.324
Brodix -10 CNC Jones Engineering Alum240/-2.125/1.6071-151/114
75.5%
223/156
70%
62.9/77.6
186/230
.763/.709
273/207
75.8%
77/103
228/305
.70/.705
304/230
75.7%
85.7/114
254/339
.624/.627
324/240
74.1%
91.4/119
271/354
.554/.545
332/245
73.8%
93.6/122
277/361
.487/.477
---268/199
74.2%
1.38
.430/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix -11 STD or SP 23 Deg Alum221/-2.08/1.6067-132/109
82.6%
188/138
73.4%
55.3/68.6
164/203
.657/.627
232/155
66.8%
68.3/77.1
202/228
.608/.528
260/161
61.9%
76.5/80.1
227/237
.545/.439
256/166
64.8%
75.3/82.6
223/245
.447/.377
258/167
64.7%
75.9/83.1
225/246
.386/.325
---221/149
67.6%
1.18
.421/.324
Brodix -11 STD X 23 Deg 40/60 Alum225/-2.08/1.6067-133/90
67.7%
191/126
66%
56.2/62.7
167/186
.667/.572
235/158
67.2%
69.2/78.6
205/233
.616/.538
272/184
67.6%
80/91.5
237/271
.57/.501
283/200
70.7%
83.3/99.5
247/295
.494/.454
285/208
73%
83.9/103
249/307
.427/.405
---233/161
69%
1.27
.421/.324
Brodix -11 SP X ASCS/SUPR Alum215/-2.08/1.6067-130/100
76.9%
187/132
70.6%
55/65.7
163/195
.653/.60
232/162
69.8%
68.3/80.6
202/239
.608/.552
265/185
69.8%
78/92
231/273
.556/.504
267/201
75.3%
78.6/100
233/296
.466/.456
270/210
77.8%
79.5/104
235/309
.404/.409
---225/165
73.3%
1.26
.421/.324
Brodix -11 SP X ASCS 3V Performance AlumN/A2.08/1.60N/A74/67
90.5%
156/125
80.1%
212/172
81.1%
62.4/85.5
185/253
.741/.781
255/193
75.7%
75/96
222/284
.668/.657
272/201
73.9%
80/100
237/296
.57/.548
280/201
71.8%
82.4/100
244/296
.489/.456
----235/178
75.9%
-
.421/.324
Brodix -11 SP X ASCS Chad Speier Worked AlumN/A2.08/1.60N/A-142/-211/-
62.1
184
.737
260/-
76.5
227
.681
290/-
85.3
253
.608
299/-
88
261
.522
292/-
85.9
255
.437
292/-
85.9
255
.383
291/-
85.6
254
.339
-260
-
-
.421/.324
Brodix -11 SP X ASCS CNC smeg AlumN/A2.08/1.60N/A-132/-186/-
54.7
162
.65
235/-
69.2
205
.616
277/-
81.5
242
.581
300/-
88.3
262
.524
309/-
90.9
269
.463
310/-
91.2
270
.406
310/-
91.2
270
.361
-257
-
-
.421/.324
Brodix -11 SP X 23 Deg 40/60 Alum225/-2.08/1.6067-133/103
77.4%
191/137
71.7%
56.2/68.1
167/202
.667/.622
235/166
70.6%
69.2/82.6
205/245
.616/.565
272/188
69.1%
80/93.5
237/277
.57/.512
283/201
71%
83.3/100
247/296
.494/.456
285/211
74%
83.9/105
249/311
.427/.411
---233/168
71.9%
1.27
.421/.324
Brodix -11 KC SP X 23 Deg 40/60 Alum231/-2.10/1.6067-146/113
77.4%
203/149
73.4%
58.6/74.1
174/220
.703/.677
253/177
70%
73/88
216/261
.657/.603
293/198
67.6%
84.6/98.5
251/292
.608/.54
314/228
72.6%
90.7/113
269/336
.543/.518
316/236
74.7%
91.2/117
270/348
.469/.459
---254/184
72.2%
1.37
.425/.324
Brodix -12 WP SP RI - 247 15 Deg CNC 40/60 Alum247/-2.15/1.6060-152/120
78.9%
230/170
73.9%
63.4/84.6
188/251
.777/.772
284/216
76.1%
78.2/107
232/318
.72/.736
316/233
73.7%
87/116
258/343
.641/.635
326/240
73.6%
89.8/119
266/354
.551/.545
330/248
75.2%
90.9/123
269/365
.478/.483
---273/205
74.9%
1.34
.435/.324
Brodix -12 WP SP RI - 262 15 Deg CNC 40/60 Alum262/-2.15/1.6060-150/120
80%
228/170
74.6%
62.8/84.6
186/251
.771/.772
282/216
76.6%
77.7/107
230/318
.715/.736
322/233
72.4%
88.7/116
263/343
.653/.635
330/240
72.7%
90.9/119
269/354
.558/.545
335/248
74%
92.3/123
273/365
.485/.483
---275/205
74.5%
1.28
.435/.324
Brodix -12 WP SP RI MC 15 Deg CNC 58/107 Alum262/-2.17/1.6061-155/117
75.5%
224/177
79%
60.6/88
179/261
.75/.804
282/218
77.3%
76.2/108
226/321
.708/.743
329/231
70.2%
89/115
264/340
.661/.63
335/240
71.6%
90.6/119
268/354
.561/.545
347/247
71.2%
93.8/123
278/364
.498/.481
---279/205
73.6%
1.32
.439/.324
Brodix -12 KC SP B 15 Deg CNC 40/60 Alum287/-2.15/1.6061-155/120
77.4%
230/168
73%
63.4/83.6
188/248
.777/.763
285/216
75.8%
78.5/107
233/318
.723/.736
320/232
72.5%
88.1/115
261/342
.649/.632
343/240
70%
94.5/119
280/354
.58/.545
354/247
69.8%
97.5/123
289/364
.513/.481
---281/204
72.5%
1.23
.435/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix -12 STS SP WB MC 15 Deg CNC 70/125 Alum305/-2.20/1.6069-159/106
66.7%
233/145
62.2%
61.3/72.1
182/214
.77/.659
290/190
65.5%
76.3/94.5
226/280
.718/.647
334/221
66.2%
87.9/110
260/326
.662/.602
361/235
65.1%
95/117
281/346
.596/.534
372/247
66.4%
97.9/123
290/364
.527/.481
---292/191
65.4%
1.22
.446/.324
Brodix -12 15 Deg 288 CNC Chapman Alum288/-2.20/1.625
-
No Pipe
58.573/51
69.9%
163/112
68.7%
238/173
72.7%
62.6/83.4
186/247
.786/.774
293/219
74.7%
77.1/106
228/313
.726/.735
325/238
73.2%
85.5/115
253/340
.644/.639
362/242
66.9%
95.2/117
282/346
.598/.541
363/251
69.1%
95.5/121
283/359
.514/.481
---291/206
70.8%
1.26
.446/.329
Brodix -12 RVR 15 Deg Jones Engineering70/125 Alum285/-2.18/1.6077-152/108
71.1%
231/149
64.5%
61.9/74.1
183/220
.77/.677
292/204
69.9%
78.2/101
232/301
.73/.695
339/236
69.6%
90.8/117
269/348
.678/.643
360/245
68.1%
96.4/122
286/361
.60/.556
375/252
67.2%
100/125
298/371
.536/.491
375/255
68%
100/127
298/376
.469/.434
--303/207
68.2%
1.32
.441/.324
Brodix -12X12 WP SP B - 275 12 Deg CNC Alum275/-2.15/1.6060-166/112
67.5%
236/156
66.1%
65/77.6
193/230
.798/.709
293/188
64.2%
80.7/93.5
239/277
.743/.64
333/237
71.2%
91.7/118
272/349
.675/.646
344/249
72.4%
94.8/124
281/367
.581/.565
346/255
73.7%
95.3/127
282/376
.501/.496
---286/200
69.7%
1.26
.435/.324
Brodix -12X12 WP SP B - 286 12 Deg CNC Alum286/-2.18/1.6060-154/112
72.7%
228/156
68.4%
61.1/77.6
181/230
.76/.709
289/188
65.1%
77.4/93.5
229/277
.723/.64
334/237
71%
89.5/118
265/349
.668/.646
357/249
69.7%
95.6/124
283/367
.595/.565
360/255
70.8%
96.4/127
286/376
.514/.496
---287/200
69.5%
1.26
.441/.324
Brodix -12X12 WP SP B - 296 12 Deg CNC Alum296/-2.18/1.6060-165/112
67.9%
230/156
67.8%
61.6/77.6
183/230
.767/.709
291/188
64.6%
78/93.5
231/277
.728/.64
338/237
70.1%
90.6/118
268/349
.676/.646
358/249
69.6%
95.9/124
284/367
.597/.565
376/255
67.8%
101/127
298/376
.537/.496
---293/200
68.1%
1.27
.441/.324
Brodix -12X12 WP SP B - 299 12 Deg CNC Alum299/-2.20/1.6060-154/119
77.3%
228/158
69.3%
60/78.6
178/233
.753/.718
290/216
74.5%
76.3/107
226/318
.718/.736
343/245
71.4%
90.2/122
267/361
.68/.668
375/254
67.7%
98.6/126
292/374
.619/.577
388/258
66.5%
102/128
302/380
.549/.502
399/263
65.9%
105/131
311/388
.494/.448
--311/216
69.5%
1.33
.446/.324
Brodix -12X12 15 Deg 272 CNC Chapman Alum272/-2.18/1.625
-
No Pipe
5673/54
74%
160/109
68.1%
234/171
73.1%
62.7/82.5
186/244
.78/.765
292/210
71.9%
78.2/101
232/300
.73/.704
330/232
70.3%
88.4/112
262/331
.66/.623
355/241
67.9%
95.1/116
282/344
.592/.539
359/250
69.6%
96.2/121
285/357
.513/.479
368/255
69.3%
98.6/123
292/364
.46/.428
--300/210
70%
1.35
.441/.329
Brodix -12X12 15 Deg 292 CNC Chapman Alum292/-2.20/1.625
-
No Pipe
61.573/54
74%
151/109
72.2%
224/171
76.3%
58.9/82.5
175/244
.74/.765
287/210
73.2%
75.5/101
224/300
.711/.704
337/232
68.8%
88.7/112
263/331
.668/.623
365/241
66%
96/116
285/344
.603/.539
383/250
65.3%
101/121
299/357
.542/.479
393/255
64.9%
103/123
306/364
.487/.428
--306/210
68.6%
1.35
.446/.329
Brodix -13 KC 13 Deg Ported 85/134 Alum283/-2.18/1.62547-159/113
71.1%
239/164
68.6%
64/79.1
190/234
.797/.733
307/213
69.4%
82.2/103
244/304
.768/.714
352/236
67%
94.3/114
279/337
.704/.633
359/247
68.8%
96.2/119
285/353
.598/.552
364/258
70.9%
97.5/124
289/369
.52/.494
370/263
71.1%
99.1/127
294/376
.463/.441
--307/213
69.5%
1.31
.441/.329
Brodix 13 Deg LMD CNC Rons Porting Service I-50 E-45 85/134 Alum285/-2.18/1.62543-161/126
78.3%
243/182
74.9%
65.1/87.8
193/260
.81/.814
308/220
71.4%
82.5/106
244/314
.77/.738
353/248
70.3%
94.6/120
280/354
.706/.665
378/262
69.3%
101/126
300/374
.63/.586
382/270
70.7%
102/130
303/386
.546/.517
385/275
71.4%
103/133
306/393
.481/.461
387/278
71.8%
104/134
307/397
.43/.414
-325/233
71.7%
1.36
.441/.329
Brodix 13 Deg LMD Jones Engineering I-45 E-45 85/134 Alum282/-2.18/1.62543-158/110
69.6%
234/156
66.7%
62.7/75.2
186/223
.78/.698
302/219
72.5%
80.9/106
240/313
.755/.735
349/243
69.6%
93.5/117
277/347
.698/.652
371/260
70.1%
99.4/125
295/371
.618/.581
377/267
70.8%
101/129
299/381
.539/.512
385/271
70.4%
103/131
306/387
.481/.454
--311/218
70.1%
1.37
.441/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix -15 WP SP / STD 15 Deg Ported 58/107 Alum267/-2.18/1.62551-156/111
71.2%
225/164
72.9%
60.3/79.1
179/234
.75/.733
275/223
81.1%
73.7/108
218/319
.688/.748
327/245
74.9%
87.6/118
260/350
.654/.657
358/254
70.9%
95.9/122
284/363
.597/.568
362/259
71.5%
97/125
287/370
.517/.496
---284/209
73.8%
1.36
.441/.329
Brodix 15 Deg CNC Alum262/-2.15/1.6060-153/120
78.4%
228/170
74.6%
62.8/84.6
186/251
.771/.772
282/216
76.6%
77.7/107
230/318
.715/.736
322/233
72.4%
88.7/116
263/343
.653/.635
332/240
72.3%
91.4/119
271/354
.561/.545
340/252
74.1%
93.7/125
277/371
.493/.491
---276/205
74.3%
1.30
.435/.324
Brodix 15 Deg CNC Jones Engineering I-45 E-45 Alum261/-2.18/1.6051-156/111
71.2%
225/164
72.9%
60.3/81.6
179/242
.75/.745
275/223
81.1%
73.7/111
218/329
.688/.76
327/245
74.9%
87.6/122
260/361
.654/.668
358/254
70.9%
95.9/126
284/374
.597/.577
362/259
71.5%
97/129
287/382
.517/.504
---284/209
73.8%
1.39
.441/.324
Brodix 15 Deg CNC Rons Porting Service Alum297/-2.20/1.6069-155/125
80.6%
230/175
76.1%
60.5/87
179/258
.76/.795
290/210
72.4%
76.3/104
226/309
.718/.715
340/232
68.2%
89.4/115
265/342
.674/.632
375/241
64.3%
98.6/120
292/355
.619/.547
386/251
65%
102/125
301/370
.546/.489
---296/206
69.5%
1.30
.446/.324
Brodix -16 KC STD 16 Deg 58/107 Alum269/-2.18/1.62549-142/119
83.8%
211/161
76.3%
56.5/77.6
167/230
.703/.72
277/198
71.5%
74.2/95.5
220/283
.693/.664
332/233
70.2%
88.9/112
264/333
.664/.625
367/252
68.7%
98.3/122
291/360
.612/.563
379/261
68.9%
102/126
301/373
.541/.50
---285/204
71.7%
1.41
.441/.329
Brodix 16 Deg CNC Jones Engineering I-45 E-45 Alum267/-2.18/1.6048-161/101
62.7%
231/149
64.5%
61.9/74.1
183/220
.77/.677
291/211
72.5%
78/105
231/311
.728/.719
337/237
70.3%
90.3/118
268/349
.674/.646
360/253
70.3%
96.4/126
286/373
.60/.575
371/263
70.9%
99.4/131
295/388
.53/.512
375/268
71.5%
100/133
298/395
.469/.456
--304/212
69.7%
1.40
.441/.324
Brodix -18 STD X 18 Deg 40/60 Alum244/-2.14/1.6068-157/106
67.5%
212/145
68.4%
58.9/72.1
175/214
.72/.659
260/179
68.8%
72.3/89
214/264
.662/.61
303/195
64.4%
84.2/97
250/287
.617/.531
319/205
64.3%
88.7/102
263/302
.542/.466
325/211
64.9%
90.4/105
268/311
.473/.411
---263/174
66.1%
1.33
.433/.324
Brodix -18 STD X 18 Deg M2 Race Systems CNC 40/60 Alum254/-2.14/1.60
4.125
68-145/110
75.9%
214/154
72%
59.5/76.6
176/227
.727/.699
261/206
78.9%
72.6/102
215/304
.665/.702
303/224
73.9%
84.2/111
250/330
.617/.61
328/231
70.4%
91.2/115
270/340
.557/.525
336/237
70.5%
93.4/118
277/349
.489/.461
---265/194
73.2%
1.32
.433/.324
Brodix -18 SP X 18 Deg 40/60 Alum244/-2.14/1.6068-157/122
77.7%
212/164
77.4%
58.9/81.6
175/242
.72/.745
260/200
76.9%
72.3/99.5
214/295
.662/.681
303/217
71.6%
84.2/108
250/320
.617/.591
319/226
70.8%
88.7/112
263/333
.542/.513
325/233
71.7%
90.4/116
268/343
.473/.454
---263/194
73.7%
1.33
.433/.324
Brodix -18 SP X 18 Deg CNC M2 Race Systems 40/60 Alum253/-2.14/1.60
4.125
68-145/119
82.1%
214/158
73.8%
59.5/78.6
176/233
.727/.718
261/196
75.1%
72.6/97.5
215/289
.665/.668
303/232
76.6%
84.2/115
250/342
.617/.632
328/243
74.1%
91.2/121
270/358
.557/.552
336/250
74.4%
93.4/124
277/368
.489/.487
---265/200
75.5%
1.33
.433/.324
Brodix -18 SP X 18 Deg Ported Jason 40/60 Alum258/-2.15/1.60N/A-144/127
88.2%
203/175
86.2%
55.9/87
166/258
.686/.795
261/216
82.8%
71.9/107
213/318
.662/.736
306/233
76.1%
84.3/116
250/343
.621/.635
334/240
71.9%
92/119
273/354
.564/.545
351/245
69.8%
96.7/122
286/361
.508/.477
359/248
69.1%
98.9/123
293/365
.455/.422
--280/212
75.8%
1.39
.435/.324
Brodix -18 SP 18 Deg 262 CNC Chapman 40/60 Alum262/-2.15/1.625
-
No Pipe
5672/52
72.2%
161/108
67.1%
225/174
77.3%
62/83.9
184/249
.761/.778
273/223
81.7%
75.2/108
223/319
.692/.748
314/246
78.3%
86.5/119
256/351
.637/.66
335/257
76.7%
92.3/124
273/367
.566/.575
348/263
75.6%
95.9/127
284/376
.504/.504
---276/212
76.8%
1.33
.435/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix -18 WP SP C 18 Deg CNC 58/107 Alum254/-2.18/1.62556-157/112
71.3%
230/167
72.6%
61.6/80.5
183/239
.767/.747
280/209
74.6%
75/101
222/299
.70/.701
329/227
69%
88.1/109
261/324
.658/.609
360/238
66.1%
96.4/115
286/340
.60/.532
367/245
66.8%
98.3/118
291/350
.524/.47
---287/200
69.5%
1.44
.441/.329
Brodix -18 KC SP C 18 Deg 58/107 Alum254/-2.18/1.62556-163/119
73%
232/172
74.1%
62.2/82.9
184/246
.773/.769
288/214
74.3%
77.2/103
229/306
.72/.718
335/233
69.6%
89.8/112
266/333
.67/.625
351/242
68.9%
94/117
279/346
.585/.541
360/250
69.4%
96.4/121
286/357
.514/.479
---288/205
71.1%
1.42
.441/.329
Brodix -18 WP SP C AP 18 Deg CNC 58/107 Alum266/-2.18/1.62556-154/134
87%
224/175
78.1%
60/84.4
178/250
.747/.783
278/241
86.7%
74.5/116
221/344
.695/.808
328/261
79.6%
87.9/126
260/373
.656/.70
369/270
73.2%
98.9/130
293/386
.615/.604
395/274
69.4%
106/132
314/391
.564/.525
---291/226
77.5%
1.48
.441/.329
Brodix 18 Deg Busch Ported ET Performance Alum257/-2.15/1.60
4.03
52.574/49
66.2%
159/114
71.7%
231/177
76.6%
63.6/88
189/261
.781/.804
288/219
76%
79.3/109
235/323
.73/.746
323/238
73.7%
89/118
264/351
.655/.649
340/246
72.4%
93.7/122
277/363
.575/.559
----268/199
74.1%
1.32
.435/.324
Brodix 18 Deg Ported ET Performance Alum260/-2.14/1.60
4.155
52.571/54
76.1%
143/106
74.1%
220/159
72.3%
61.2/79.1
181/234
.747/.722
283/213
75.3%
78.7/106
233/314
.721/.726
326/239
73.3%
90.6/119
269/352
.664/.651
349/251
71.9%
97/125
287/370
.593/.57
356/257
72.2%
99/128
293/379
.518/.50
362/264
72.9%
101/131
298/389
.461/.45
--291/213
73%
1.39
.433/.324
Brodix 18 Deg CNC Rons Porting Service 262 Alum262/-2.18/1.62553-156/129
82.7%
225/188
83.6%
60.3/90.6
179/269
.75/.841
281/232
82.6%
75.3/112
223/331
.703/.778
331/243
73.4%
88.7/117
263/347
.662/.652
350/248
70.9%
93.8/120
278/354
.583/.555
360/250
69.4%
96.4/121
286/357
.514/.479
362/252
69.6%
97/122
287/360
.453/.423
--295/220
74.7%
1.38
.441/.329
Brodix 18 Deg CNC Rons Porting Service 278 Alum278/-2.18/1.62553-150/125
83.3%
220/180
81.8%
58.9/86.8
175/257
.733/.805
281/224
79.7%
75.3/108
223/320
.703/.751
331/240
72.5%
88.7/116
263/343
.662/.644
362/248
68.5%
97/120
287/354
.603/.555
380/251
66.1%
102/121
302/359
.543/.481
385/254
66%
103/122
306/363
.481/.426
--301/217
72.2%
1.38
.441/.329
Brodix 18 Deg CNC AP Alum266/-2.18/1.62557-154/113
73.4%
224/162
72.3%
60/78.1
178/231
.747/.724
278/224
80.6%
74.5/108
221/320
.695/.751
328/241
73.5%
87.9/116
260/344
.656/.647
369/248
67.2%
98.9/120
293/354
.615/.555
395/254
64.3%
106/122
314/363
.564/.487
---291/207
71.1%
1.48
.441/.329
Brodix 18 Deg Ported Meaux Racing SF600 Alum256/992.18/1.625
4.125
No Pipe
48.5-139/124
89.2%
218/192
88.1%
58.4/92.6
173/274
.727/.859
281/228
81.1%
75.3/110
223/326
.703/.765
321/246
76.6%
86/119
255/351
.642/.66
343/252
73.5%
91.9/122
272/360
.572/.563
351/258
73.5%
94/124
279/369
.501/.494
358/262
73.2%
95.9/126
284/374
.448/.439
362/265
73.2%
97/128
287/379
.402/.395
-297/228
77%
1.41/2.68
.441/.329
Brodix Track 1 Alum CHPN/A2.08/1.60N/A60/48
80%
115/106
92.2%
166/147
88.6%
48.9/73.1
145/217
.58/.668
209/178
85.2%
61.5/88.5
182/262
.548/.606
246/191
77.6%
72.4/95
215/281
.516/.521
267/200
74.9%
78.6/99.5
233/295
.466/.454
----201/164
82%
-
.421/.324
Brodix Track 1 Alum215/-2.08/1.6069-128/111
86.7%
183/149
81.4%
53.9/74.1
160/220
.639/.677
229/179
78.2%
67.4/89
200/264
.60/.61
268/193
72%
78.9/96
234/284
.562/.526
269/207
77%
79.2/103
235/305
.47/.47
----215/168
77.9%
1.25
.421/.324
Brodix Track 1 227 CNC Out of Box Weingartner Racing227/-2.08/1.60
4.125
No Pipe
N/A70/58
82.9%
146/114
78.1%
214/163
76.2%
63/81.1
187/240
.748/.74
268/205
76.5%
78.9/102
234/302
.702/.698
298/221
74.2%
87.7/110
260/326
.625/.602
312/227
72.8%
91.8/113
272/335
.545/.516
318/235
73.9%
93.6/117
277/346
.476/.457
---259/194
74.9%
1.40
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix Track 1 23 Deg Ported Alum215/-2.08/1.6068-147/110
74.8%
213/142
66.7%
62.7/70.6
186/209
.744/.645
258/180
69.8%
75.9/89.5
225/265
.676/.613
288/213
74%
84.8/106
251/314
.604/.58
290/225
77.6%
85.3/112
253/332
.507/.511
294/231
78.6%
86.5/115
256/340
.44/.45
---248/184
73.9%
1.37
.421/.324
Brodix Track 1 23 Deg CNC M2 Race Systems Alum215/-2.08/1.60
4.03
68-151/116
76.8%
219/150
68.5%
64.5/74.6
191/221
.765/.681
263/185
70.3%
77.4/92
229/273
.689/.63
291/208
71.5%
85.6/103
254/307
.61/.567
294/219
74.5%
86.5/109
256/323
.514/.497
296/227
76.7%
87.1/113
258/335
.443/.442
---252/184
73%
1.38
.421/.324
Brodix Track 1 23 Deg CNC M2 Race Systems Alum227/-2.08/1.60
4.125
68-145/116
80%
207/150
72.5%
60.9/74.6
181/221
.723/.681
260/185
71.2%
76.5/92
227/273
.681/.63
297/208
70%
87.4/103
259/307
.623/.567
305/219
71.8%
89.8/109
266/323
.533/.497
309/227
73.5%
90.9/113
269/335
.463/.442
---254/184
72.6%
1.36
.421/.324
Brodix Track 1 23 Deg Alum221/-2.08/1.6067-124/103
83.1%
179/138
77.1%
52.7/68.6
156/203
.625/.627
228/164
71.9%
67.1/81.6
199/242
.597/.559
264/178
67.4%
77.7/88.5
230/262
.553/.485
276/186
67.4%
81.2/92.5
241/274
.482/.422
279/190
68.1%
82.1/94.5
243/280
.418/.37
---225/160
71%
1.26
.421/.324
Brodix Track 1 23 Deg Ported BHPerformace AlumN/A-
-
No Pipe
N/A68/60
88.2%
134/115
85.8%
198/162
81.8%
-
257/192
74.7%
-
301/206
68.4%
-
318/218
68.6%
-
330/227
68.8%
-
---256/187
72.8%
Brodix Track 1X 23 Deg 40/60 Alum222/-2.10/1.6068-152/113
74.3%
213/152
71.4%
61.5/75.6
182/224
.737/.69
262/173
66%
75.6/86
224/255
.68/.589
285/185
64.9%
82.3/92
244/273
.592/.504
287/192
66.9%
82.9/95.5
246/283
.497/.436
292/195
66.8%
84.3/97
250/287
.433/.38
---249/168
67.7%
1.32
.425/.324
Brodix Track 1X 23 Deg CNC 40/60 Rons Porting Service Alum236/-2.125/1.6069-155/119
76.8%
224/163
72.8%
63.2/81.1
187/240
.766/.74
279/194
69.5%
78.7/96.5
233/286
.716/.661
308/210
68.2%
86.8/104
257/309
.632/.572
326/226
69.3%
91.9/112
272/333
.557/.513
331/235
71%
93.3/117
277/346
.485/.457
333/242
72.7%
93.9/120
278/357
.427/.412
--279/198
71%
1.41
.430/.324
Brodix Track 1 40/60 Valve Spacing 23 Deg AlumN/A2.125/1.60N/A-138/106
76.8%
199/145
72.9%
56.1/72.1
166/214
.681/.659
253/182
71.9%
71.3/90.5
211/268
.649/.62
294/209
71.1%
82.9/104
246/308
.603/.57
318/224
70.4%
89.7/111
266/330
.544/.509
325/233
71.7%
91.6/116
272/343
.476/.454
---255/183
72%
-
.430/.324
Brodix STS Track 1 23 Deg Alum215/-2.08/1.6068-150/116
77.3%
213/150
70.4%
62.7/74.6
186/221
.744/.681
258/185
71.7%
75.9/92
225/273
.676/.63
285/208
73%
83.9/103
249/307
.597/.567
303/219
72.3%
89.2/109
264/323
.529/.497
305/227
74.4%
89.8/113
266/335
.457/.442
---252/184
73%
1.42
.421/.324
Brodix KC Track 1 23 Deg Alum227/-2.08/1.6068-154/116
75.3%
223/150
67.3%
65.6/74.6
194/221
.779/.681
270/185
68.5%
79.5/92
235/273
.708/.63
303/208
68.6%
89.2/103
264/307
.635/.567
312/219
70.2%
91.8/109
272/323
.545/.497
316/227
71.8%
93/113
276/335
.473/.442
---263/184
70%
1.39
.421/.324
Brodix STS Track 1 23 Deg CNC I-50 E-45 40/60 Alum233/-2.125/1.6068-139/106
76.3%
200/145
72.5%
56.4/72.1
167/214
.684/.659
254/181
71.3%
71.6/90
212/267
.651/.617
296/209
70.6%
83.5/104
247/308
.607/.57
319/224
70.2%
89.9/111
267/330
.545/.509
326/233
71.5%
91.9/116
272/343
.478/.454
---256/183
71.6%
1.40
.430/.324
Brodix JJ 180 23 Deg Alum180/-2.02/1.6067-138/97
70.3%
194/129
66.5%
60.5/64.2
179/190
.698/.586
234/155
66.2%
73/77.1
216/228
.631/.528
243/171
70.4%
75.8/85
225/252
.525/.466
245/179
73.1%
76.4/89
227/264
.441/.407
----211/146
69.4%
1.36
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix JJ 200 23 Deg Alum200/-2.05/1.6067-125/97
77.6%
182/129
70.9%
55.1/64.2
163/190
.645/.586
227/155
68.3%
68.8/77.1
204/228
.604/.528
260/171
65.8%
78.8/85
233/252
.553/.466
266/179
67.3%
80.6/89
239/264
.471/.407
----212/146
69%
1.33
.415/.324
Brodix JJ 210 CNC 23 Deg Alum210/-2.08/1.6076-148/110
74.3%
217/166
76.5%
63.9/82.6
189/245
.758/.754
260/200
76.9%
76.5/99.5
227/295
.681/.681
278/214
77%
81.8/106
242/315
.583/.583
284/219
77.1%
83.6/109
248/323
.496/.497
287/224
78%
84.5/111
250/330
.43/.436
---246/189
76.9%
1.37
.421/.324
Brodix IK 180 23 Deg Alum180/-2.02/1.6064/70-138/112
81.2%
188/149
79.3%
58.7/74.1
174/220
.676/.677
234/167
71.4%
73/83.1
216/246
.631/.569
243/175
72%
75.8/87
225/258
.525/.477
245/178
72.7%
76.4/88.5
227/262
.441/.404
----210/156
74.5%
1.36
.409/.324
Brodix IK 200 23 Deg Alum200/-2.02/1.6064/70-123/100
81.3%
181/145
80.1%
56.5/72.1
167/214
.651/.659
230/164
71.3%
71.8/81.6
213/242
.621/.559
253/171
67.6%
78.9/85
234/252
.546/.466
261/176
67.4%
81.4/87.5
241/259
.469/.40
262/177
67.6%
81.8/88
242/261
.404/.345
---218/156
71.2%
1.31
.409/.324
Brodix IK 200 23 Deg Out of Box Weingartner Racing Alum200/-2.02/1.60
4.155
No Pipe
N/A62/46
74.2%
125/94
75.2%
171/134
78.4%
53.4/66.6
158/197
.615/.609
223/157
70.4%
69.6/78.1
206/231
.602/.535
235/166
70.6%
73.3/82.6
217/245
.507/.452
260/172
66.2%
81.1/85.5
240/253
.468/.391
262/173
66%
81.8/86
242/255
.404/.337
---213/149
70.2%
1.31
.409/.324
Brodix IK 210 23 Deg Ported Alum210/-2.08/1.6075-148/110
74.3%
217/166
76.5%
63.9/82.6
189/245
.758/.754
260/200
76.9%
76.5/99.5
227/295
.681/.681
278/214
77%
81.8/106
242/315
.583/.583
284/219
77.1%
83.6/109
248/323
.496/.497
287/224
78%
84.5/111
250/330
.43/.436
---246/189
76.9%
1.37
.421/.324
Brodix RR 180 23 Deg Alum180/-2.02/1.6064/67-138/97
70.3%
194/129
66.5%
60.5/64.2
179/190
.698/.586
234/155
66.2%
73/77.1
216/228
.631/.528
243/171
70.4%
75.8/85
225/252
.525/.466
245/179
73.1%
76.4/89
227/264
.441/.407
----211/146
69.4%
1.36
.409/.324
Brodix RR 180 23 Deg CNC CC Alum180/-2.02/1.6064/67-142/113
79.6%
199/153
76.9%
62.1/76.1
184/225
.716/.695
238/171
71.8%
74.3/85
220/252
.642/.583
241/179
74.3%
75.2/89
223/264
.52/.488
241/184
76.3%
75.2/91.5
223/271
.434/.418
----212/160
75.4%
1.34
.409/.324
Brodix RR 200 23 Deg Alum200/-2.055/1.6064/67-125/97
77.6%
182/129
70.9%
54.9/64.2
163/190
.644/.586
227/155
68.3%
68.4/77.1
203/228
.602/.528
260/171
65.8%
78.4/85
232/252
.552/.466
266/179
67.3%
80.2/89
238/264
.47/.407
----212/146
69%
1.33
.416/.324
Brodix RR 200 23 Deg CNC CC Alum200/-2.055/1.6064/67-141/113
80.1%
221/153
69.2%
66.6/76.1
197/225
.782/.695
242/171
70.7%
73/85
216/252
.642/.583
265/179
67.5%
79.9/89
237/264
.562/.488
272/183
67.3%
82/91
243/270
.481/.416
----228/160
70%
1.36
.416/.324
Brodix CV SP 265 Alum265/-2.20/1.6054-159/109
68.6%
232/145
62.5%
61/72.1
181/214
.766/.659
293/188
64.2%
77.1/93.5
228/277
.726/.64
347/221
63.7%
91.3/110
270/326
.688/.602
379/237
62.5%
99.7/118
295/349
.626/.538
395/244
61.8%
104/121
308/360
.559/.475
---301/191
63.4%
1.49
.446/.324
Brodix CV SP 330 Alum330/-2.25/1.6054-165/116
70.3%
243/158
65%
61.1/78.6
181/233
.785/.718
305/193
63.3%
76.7/96
227/284
.739/.657
350/234
66.9%
88/116
261/345
.678/.638
376/245
65.2%
94.6/122
280/361
.607/.556
392/254
64.8%
98.6/126
292/374
.543/.494
---305/200
65.5%
1.19
.456/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix 13 Deg CNC Jones Engineering Alum282/-2.18/1.6043-158/110
69.6%
234/156
66.7%
62.7/77.6
186/230
.78/.709
302/219
72.5%
80.9/109
240/323
.755/.746
349/243
69.6%
93.5/121
277/358
.698/.662
371/260
70.1%
99.4/129
295/383
.618/.59
377/267
70.8%
101/133
299/393
.539/.52
385/271
70.4%
103/135
306/399
.481/.462
--311/218
70.1%
1.37
.441/.324
Brodix BP AK 13 Deg 270 95/150 Alum270/-2.18/1.6052-154/110
71.4%
236/161
68.2%
63.2/80.1
187/237
.787/.731
298/213
71.5%
79.8/106
237/314
.745/.726
333/238
71.5%
89.2/118
264/351
.666/.649
361/248
68.7%
96.7/123
287/365
.602/.563
376/258
68.6%
101/128
298/380
.537/.502
---293/205
69.9%
1.39
.441/.324
Brodix BP AK 13 Deg 285 95/150 Alum285/-2.18/1.6052-157/110
70.1%
239/161
67.4%
64/80.1
190/237
.797/.731
298/213
71.5%
79.8/106
237/314
.745/.726
339/238
70.2%
90.8/118
269/351
.678/.649
369/248
67.2%
98.9/123
293/365
.615/.563
382/258
67.5%
102/128
303/380
.546/.502
---297/205
68.8%
1.34
.441/.324
Brodix WP LM 12 Deg 85/134 Alum300/-2.18/1.62549-155/111
71.6%
236/155
65.7%
63.2/74.7
187/221
.787/.693
305/215
70.5%
81.7/104
242/307
.763/.721
352/243
69%
94.3/117
279/347
.704/.652
375/254
67.7%
100/122
298/363
.625/.568
384/263
68.5%
103/127
305/376
.549/.504
387/270
69.8%
104/130
307/386
.484/.453
--313/216
68.9%
1.29
.441/.329
Brodix FF 13 Deg Ported Jones Engineering 88/184 I-45 E-45 Alum290/-2.20/1.6049-159/114
71.7%
238/155
65.1%
62.6/77.1
186/228
.786/.704
304/194
63.8%
80/96.5
237/286
.753/.661
356/237
66.6%
93.7/118
277/349
.706/.646
377/253
67.1%
99.2/126
294/373
.623/.575
386/260
67.4%
102/129
301/383
.546/.506
389/265
68.1%
102/132
303/391
.482/.451
--316/211
66.9%
1.34
.446/.324
Brodix FF 10 Deg Ported Jones Engineering 110/184 Alum300/-2.23/1.6045-145/104
71.7%
228/161
70.6%
58.4/80.1
173/237
.743/.731
304/209
68.8%
77.8/104
231/308
.743/.712
365/238
65.2%
93.5/118
277/351
.714/.649
397/252
63.5%
102/125
301/371
.647/.572
401/258
64.3%
103/128
304/380
.56/.502
404/264
65.3%
103/131
306/389
.494/.45
--321/212
66.2%
1.35
.452/.324
Brodix BD 1000 12 Deg 275 Weld Tech Alum275/-2.15/1.6067-166/112
67.5%
236/156
66.1%
65/77.6
193/230
.798/.709
293/188
64.2%
80.7/93.5
239/277
.743/.64
333/237
71.2%
91.7/118
272/349
.675/.646
344/249
72.4%
94.8/124
281/367
.581/.565
346/255
73.7%
95.3/127
282/376
.501/.496
---286/200
69.7%
1.26
.435/.324
Brodix BD 1000 12 Deg 286 Weld Tech Alum286/-2.18/1.6067-154/112
72.7%
228/156
68.4%
61.1/77.6
181/230
.76/.709
289/188
65.1%
77.4/93.5
229/277
.723/.64
334/237
71%
89.5/118
265/349
.668/.646
357/249
69.7%
95.6/124
283/367
.595/.565
360/255
70.8%
96.4/127
286/376
.514/.496
---287/200
69.5%
1.26
.441/.324
Brodix BD 1010 12 / 13.5 Deg CNC 58/125 Alum299/-2.20/1.6064-152/117
77%
229/162
70.7%
60.2/80.6
178/239
.756/.736
292/220
75.3%
76.8/109
228/324
.723/.749
343/245
71.4%
90.2/122
267/361
.68/.668
375/255
68%
98.6/127
292/376
.619/.579
388/260
67%
102/129
302/383
.549/.506
---297/210
70.8%
1.30
.446/.324
Brodix BD 1010 12 Deg CNC Jones Engineering 95/150 Alum282/-2.18/1.6044-153/110
71.9%
231/162
70.1%
61.9/80.6
183/239
.77/.736
295/221
74.9%
79/110
234/326
.738/.753
342/243
71.1%
91.6/121
271/358
.684/.662
370/252
68.1%
99.1/125
294/371
.617/.572
392/258
65.8%
105/128
311/380
.56/.502
399/261
65.4%
107/130
317/385
.499/.445
--312/215
69.1%
1.41
.441/.324
Brodix BD 2000 12 / 13.5 Deg CNC 85/125 Alum285/-2.20/1.5874-157/109
69.4%
238/152
63.9%
62.6/77.5
186/230
.786/.699
302/205
67.9%
79.4/105
235/310
.748/.707
353/232
65.7%
92.9/118
275/351
.70/.64
381/241
63.3%
100/123
297/364
.629/.554
399/250
62.7%
105/128
311/378
.565/.493
---305/198
65%
1.40
.446/.320
Brodix BD 2000 CNC Out of Box - Darin Morgan SF600 85/125 AlumN/A2.20/1.60
-
No Pipe
N/A-168/104
61.9%
237/141
59.5%
62.3/70.1
185/208
.783/.64
301/194
64.5%
79.2/96.5
235/286
.746/.661
344/223
64.8%
90.5/111
268/329
.682/.608
377/237
62.9%
99.2/118
294/349
.623/.538
400/241
60.3%
105/120
312/355
.566/.469
397/242
61%
104/120
309/357
.492/.412
381/244
64%
100/121
297/360
.42/.369
380/245
64.5%
100/122
296/361
.377/.334
332/208
62.7%
-
.446/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix BD 2000 Ported TEA 85/125 Alum285/--N/A73/59
80.8%
159/115
72.3%
230/187
81.3%
-
290/254
87.6%
-
342/277
81%
-
371/289
77.9%
-
391/295
75.4%
-
399/301
75.4%
-
--312/245
78.7%
1.40
Brodix BD 2300 13.5 Deg CNC 95/150 Alum311/-2.23/1.6049-150/113
75.3%
223/164
73.5%
57.1/81.6
169/242
.727/.745
275/219
79.6%
70.4/109
209/323
.672/.746
331/246
74.3%
84.7/122
251/363
.647/.67
382/256
67%
97.8/127
290/377
.622/.581
401/260
64.8%
103/129
304/383
.56/.506
417/267
64%
107/133
316/393
.51/.455
--311/218
70%
1.34
.452/.324
Brodix BD 2300 13.5 Deg CNC Jones Engineering 95/150 Alum312/-2.20/1.6049-137/113
82.5%
226/164
72.6%
59.5/81.6
176/242
.747/.745
304/219
72%
80/109
237/323
.753/.746
363/246
67.8%
95.5/122
283/363
.719/.67
394/256
65%
104/127
307/377
.651/.581
410/262
63.9%
108/130
320/386
.58/.51
421/267
63.4%
111/133
328/393
.522/.455
--322/218
67.7%
1.35
.446/.324
Brodix BD 4510 12 Deg 4.5 BS CNC Jones Engineering 95/150 I-45 E-45 Alum292/-2.18/1.6049-156/107
68.6%
243/155
63.8%
65.1/77.1
193/228
.81/.704
311/202
65%
83.3/100
247/298
.778/.688
383/234
61.1%
103/116
304/345
.766/.638
385/247
64.2%
103/123
306/364
.642/.561
399/253
63.4%
107/126
317/373
.57/.492
406/255
62.8%
109/127
322/376
.508/.434
--326/208
63.6%
1.39
.441/.324
Brodix WP BD 4510 12 Deg 4.5 BS CNC 88/184 I-45 E-45 Alum292/-2.20/1.6050-159/114
71.7%
243/155
63.8%
63.9/77.1
189/228
.803/.704
307/196
63.8%
80.8/97.5
239/289
.761/.668
356/229
64.3%
93.7/114
277/337
.706/.624
378/251
66.4%
99.4/125
295/370
.624/.57
390/258
66.2%
103/128
304/380
.552/.502
402/263
65.4%
106/131
313/388
.498/.448
--319/209
65.6%
1.38
.446/.324
Brodix WP FF 13 Deg 4.5 BS CNC 88/184 Alum290/-2.20/1.6049-159/114
71.7%
238/155
65.1%
62.6/77.1
186/228
.786/.704
304/194
63.8%
80/96.5
237/286
.753/.661
356/237
66.6%
93.7/118
277/349
.706/.646
377/253
67.1%
99.2/126
294/373
.623/.575
386/260
67.4%
102/129
301/383
.546/.506
389/265
68.1%
102/132
303/391
.482/.451
--316/211
66.9%
1.34
.446/.324
Brodix DR 1213 12.5 / 13.5 Deg CNC Jones Engineering Alum315/-2.23/1.6049-141/105
74.5%
221/159
71.9%
56.6/79.1
168/234
.72/.722
295/210
71.2%
75.5/104
224/309
.721/.715
351/237
67.5%
89.9/118
266/349
.686/.646
396/252
63.6%
101/125
300/371
.645/.572
421/262
62.2%
108/130
319/386
.588/.51
435/268
61.6%
111/133
330/395
.532/.456
--323/213
66.1%
1.38
.452/.324
Brodix 1213 12.5 / 13.5 Deg CNC RFD Alum318/-2.25/1.60N/A-180/155
86.1%
258/202
78.3%
64.9/100
192/298
.833/.918
314/246
78.3%
79/122
234/363
.761/.838
360/276
76.7%
90.5/137
268/407
.698/.752
410/283
69%
103/141
306/417
.662/.643
421/286
67.9%
106/142
314/421
.583/.557
433/288
66.5%
109/143
323/424
.524/.491
446/290
65%
112/144
332/427
.48/.439
-353/253
71.8%
1.40
.456/.324
Brodix GB 2000 WP 286 13.5 Deg CNC 85/125 Alum286/-2.20/1.5876-157/109
69.4%
238/152
63.9%
62.6/77.5
186/230
.786/.699
302/205
67.9%
79.4/105
235/310
.748/.707
353/232
65.7%
92.9/118
275/351
.70/.64
381/241
63.3%
100/123
297/364
.629/.554
399/250
62.7%
105/128
311/378
.565/.493
---305/198
65%
1.40
.446/.320
Brodix GB 2000 13.5 Deg Ported TEA 85/125 Alum285/--N/A78/59
75.6%
170/115
67.6%
244/187
76.6%
-
304/254
83.6%
-
349/277
79.4%
-
375/289
77.1%
-
387/295
76.2%
-
399/301
75.4%
-
--318/245
77.1%
1.40
Brodix GB 2200 WP 282 13.5 Deg CNC 85/125 Alum282/-2.20/1.5876-150/104
69.3%
223/158
70.9%
58.7/80.6
174/239
.737/.727
286/210
73.4%
75.2/107
223/317
.709/.724
336/235
69.9%
88.4/120
262/355
.666/.649
368/246
66.8%
96.8/125
287/372
.608/.566
383/252
65.8%
101/129
299/381
.542/.497
---291/201
69%
1.36
.446/.320
Brodix GB 2200 WP 282 + 30 13.5 Deg CNC 85/125 Alum282/-2.20/1.5876-150/104
69.3%
224/158
70.5%
58.9/80.6
175/239
.74/.727
289/210
72.7%
76/107
225/317
.716/.724
337/235
69.7%
88.7/120
263/355
.668/.649
371/246
66.3%
97.6/125
289/372
.613/.566
396/252
63.6%
104/129
309/381
.561/.497
---295/201
68.2%
1.40
.446/.320
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix GB 2200 13.5 Deg 282 CNC Jones Engineering 85/125 Alum282/-2.20/1.5869-150/104
69.3%
223/158
70.9%
58.7/80.6
174/239
.737/.727
286/210
73.4%
75.2/107
223/317
.709/.724
336/235
69.9%
88.4/120
262/355
.666/.649
368/246
66.8%
96.8/125
287/372
.608/.566
383/252
65.8%
101/129
299/381
.542/.497
---291/201
69%
1.36
.446/.320
Brodix GB 2200 13.5 Deg 291 CNC Jones Engineering 85/125 Alum291/-2.20/1.5869-152/104
68.4%
228/158
69.3%
60/80.6
178/239
.753/.727
292/210
71.9%
76.8/107
228/317
.723/.724
339/235
69.3%
89.2/120
264/355
.672/.649
373/246
66%
98.1/125
291/372
.616/.566
390/252
64.6%
103/129
304/381
.552/.497
---296/201
67.9%
1.34
.446/.320
Brodix GB 2300 WP 309 13.5 Deg CNC 75/125 Alum309/-2.20/1.5876-153/100
65.4%
231/151
65.4%
60.8/77
180/228
.763/.695
286/216
75.5%
75.2/110
223/326
.709/.745
342/243
71.1%
90/124
267/367
.678/.671
374/250
66.8%
98.4/128
292/378
.618/.575
394/253
64.2%
104/129
307/382
.558/.499
---297/202
68.1%
1.28
.446/.320
Brodix GB 2300 13.5 Deg CNC RFD 75/125 AlumN/A2.22/1.6048-188/140
74.5%
255/170
66.7%
65.9/84.6
195/251
.835/.772
312/240
76.9%
80.6/119
239/354
.766/.818
357/255
71.4%
92.2/127
273/376
.701/.695
399/280
70.2%
103/139
305/413
.653/.636
418/284
67.9%
108/141
320/419
.586/.553
430/289
67.2%
111/144
329/426
.528/.492
439/290
66.1%
113/144
336/427
.479/.439
-350/244
69.6%
-
.450/.324
Brodix GB 2300 13.5 Deg CNC M2 Race Systems 75/125 Alum317/-2.20/1.58
4.155
4674/63
85.1%
167/135
80.8%
225/186
82.7%
59.2/94.9
175/281
.743/.856
280/224
80%
73.7/114
218/339
.694/.773
327/240
73.4%
86/122
255/363
.648/.662
364/244
67%
95.8/124
284/369
.601/.561
388/245
63.1%
102/125
302/370
.549/.483
401/245
61.1%
105/125
313/370
.497/.423
--307/217
70.6%
1.26
.446/.320
Brodix GB 2300 13.5 Deg 309 CNC Jones Engineering 75/125 Alum309/-2.20/1.5849-153/100
65.4%
231/151
65.4%
60.8/77
180/228
.763/.695
286/216
75.5%
75.2/110
223/326
.709/.745
342/243
71.1%
90/124
267/367
.678/.671
374/250
66.8%
98.4/128
292/378
.618/.575
394/253
64.2%
104/129
307/382
.558/.499
---297/202
68.1%
1.28
.446/.320
Brodix GB 2300 13.5 Deg 311 CNC Jones Engineering 75/125 Alum311/-2.20/1.5849-155/121
78.1%
234/177
75.6%
61.6/90.3
182/267
.773/.814
296/232
78.4%
77.9/118
231/351
.733/.80
344/245
71.2%
90.5/125
268/370
.682/.676
380/252
66.3%
100/129
296/381
.628/.58
395/256
64.8%
104/131
308/387
.559/.505
---301/214
71.1%
1.27
.446/.320
Brodix GB 2300 13.5 Deg 311 CNC Jones Engineering 95/150 Alum311/-2.23/1.6049-150/113
75.3%
223/164
73.5%
57.1/81.6
169/242
.727/.745
275/219
79.6%
70.4/109
209/323
.672/.746
331/246
74.3%
84.7/122
251/363
.647/.67
382/256
67%
97.8/127
290/377
.622/.581
401/262
65.3%
103/130
304/386
.56/.51
417/267
64%
107/133
316/393
.51/.455
--311/218
70.1%
1.34
.452/.324
Brodix GB 2400 13.5 Deg 320 CNC Jones Engineering 95/150 Alum320/-2.23/1.6050-152/110
72.4%
227/148
65.2%
58.1/73.6
172/218
.74/.672
279/200
71.7%
71.4/99.5
212/295
.682/.681
342/234
68.4%
87.6/116
259/345
.669/.638
390/248
63.6%
99.9/123
296/365
.635/.563
404/254
62.9%
103/126
306/374
.564/.494
419/264
63%
107/131
318/389
.512/.45
--316/208
65.9%
1.31
.452/.324
Brodix GB 2400 WP 13.5 Deg CNC 75/150 Alum325/-2.20/1.5853-----------
-
-
.446/.320
Brodix GB 2500 13.5 Deg CNC MBE Dirt AlumN/A2.20/1.60
-
No Pipe
N/A63/48
76.2%
138/101
73.2%
214/146
68.2%
56.3/72.6
167/215
.707/.663
284/197
69.4%
74.7/98
221/290
.704/.671
342/231
67.5%
90/115
267/340
.678/.63
388/251
64.7%
102/125
302/370
.641/.57
411/261
63.5%
108/130
320/385
.582/.508
419/270
64.4%
110/134
327/398
.519/.46
422/272
64.5%
111/135
329/401
.465/.412
425/271
63.8%
112/135
331/399
.421/.369
338/222
65.7%
-
.446/.324
Brodix GB 2500 13.5 Deg CNC MBE I-55 E-55 SF600 Alum319/-2.23/1.60
4.155
No Pipe
N/A-133/98
73.7%
223/146
65.5%
57.1/72.6
169/215
.727/.663
300/188
62.7%
76.8/93.5
228/277
.733/.64
357/220
61.6%
91.4/109
271/324
.698/.60
401/248
61.8%
103/123
304/365
.653/.563
430/260
60.5%
110/129
326/383
.601/.506
445/270
60.7%
114/134
338/398
.544/.46
446/273
61.2%
114/136
338/402
.484/.413
-342/213
62.3%
1.40
.452/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix GB 2500 12.5 / 13.5 Deg CNC RFD Alum318/-2.25/1.6042-180/155
86.1%
258/202
78.3%
64.9/100
192/298
.833/.918
314/246
78.3%
79/122
234/363
.761/.838
360/276
76.7%
90.5/137
268/407
.698/.752
410/283
69%
103/141
306/417
.662/.643
421/286
67.9%
106/142
314/421
.583/.557
433/288
66.5%
109/143
323/424
.524/.491
446/290
65%
112/144
332/427
.48/.439
-353/253
71.8%
1.40
.456/.324
Brodix Canted Valve Ported Bullet Cylinder Heads AlumN/A2.20/1.60N/A80/92
115%
161/163
101%
228/206
90.4%
60/102
178/304
.753/.936
283/219
77.4%
74.4/109
221/323
.701/.746
332/223
67.2%
87.3/111
259/329
.658/.608
366/235
64.2%
96.3/117
285/346
.605/.534
389/240
61.7%
102/119
303/354
.551/.467
401/255
63.6%
105/127
313/376
.497/.434
411/260
63.3%
108/129
320/383
.453/.394
-321/225
70.1%
-
.446/.324
Canfield CCM Alum195/-2.02/1.607261/51
83.6%
128/103
80.5%
191/143
74.9%
59.6/71.1
177/211
.687/.65
238/170
71.4%
74.3/84.6
220/251
.642/.579
271/189
69.7%
84.6/94
251/279
.585/.515
254/200
78.7%
79.3/99.5
235/295
.457/.454
----216/161
74.4%
1.39
.409/.324
Canfield 23-500-65 SF600 Alum195/-2.055/1.60
4.03
1 3/4" Pipe
6572/53
73.6%
145/107
73.8%
201/143
71.1%
60.6/71.1
180/211
.711/.65
247/175
70.9%
74.5/87
221/258
.655/.596
258/190
73.6%
77.8/94.5
230/280
.547/.518
259/200
77.2%
78.1/99.5
231/295
.458/.454
259/203
78.4%
78.1/101
231/299
.393/.395
---228/170
74.4%
1.33
.416/.324
Canfield 23-550-65 Alum215/-2.08/1.60
4.125
Pipe
N/A62/43
69.4%
141/112
79.4%
207/152
73.4%
60.9/75.6
181/224
.723/.69
255/173
67.8%
75/86
222/255
.668/.589
270/184
68.1%
79.5/91.5
235/271
.566/.501
279/195
69.9%
82.1/97
243/287
.487/.443
283/213
75.3%
83.3/106
247/314
.424/.415
---239/172
71.7%
1.32
.421/.324
Canfield 23-550-65 Alan / Burtonsville Performance Out of Box SF600 Alum215/-2.08/1.60
4.25
No Pipe
N/A-/50-/992-/152-/149-/157-/161-/164-/172---
-
-
.421/.324
Canfield 23-550-65 Minor Pocket Porting Alan / Burtonsville Performance SF600 Alum215/-2.08/1.60
4.25
No Pipe
N/A-/53-/104-/162-/196-/199-/197-/197-/194---
-
-
.421/.324
Canfield 23-600-65 Alum220/-2.08/1.60
-
No Pipe
6572/52
72.2%
145/105
72.4%
206/146
70.9%
60.6/72.6
180/215
.72/.663
252/184
73%
74.2/91.5
220/271
.66/.627
288/203
70.5%
84.8/101
251/299
.604/.553
302/219
72.5%
88.9/109
263/323
.528/.497
306/227
74.2%
90.1/113
267/335
.458/.442
---250/181
72.3%
1.39
.421/.324
Canfield 220 Ported Smithberg Racing AlumN/A2.08/1.60
4.155
6566/-132/-197/-
58
172
.688
248/-
73
216
.65
289/-
85.1
252
.606
308/-
90.6
269
.538
323/-
95.1
282
.484
332/-
97.7
289
.435
337/-
99.2
294
.392
339/-
99.8
296
.355
278
-
-
.421/.324
CGM Motorsports 200 23 Deg CNC SF1020 Alum200/-2.02/1.60N/A64/57
89.1%
114/101
88.6%
161/128
79.5%
50.2/63.7
149/189
.579/.581
201/152
75.6%
62.7/75.6
186/224
.542/.518
232/159
68.5%
72.4/79.1
214/234
.501/.433
251/169
67.3%
78.3/84.1
232/249
.452/.384
----192/142
73.9%
1.26
.409/.324
CGM Motorsports 210 23 Deg CNC SF1020 Alum210/-2.02/1.60N/A71/57
80.3%
146/101
69.2%
204/157
77%
63.7/78.1
189/231
.734/.713
250/177
70.8%
78/88
231/261
.675/.603
261/186
71.3%
81.4/92.5
241/274
.563/.507
266/190
71.4%
83/94.5
246/280
.478/.431
276/195
70.7%
86.1/97
255/287
.426/.38
---234/168
71.7%
1.31
.409/.324
Competition Products Alum CHP195/602.02/1.606759/50
84.7%
112/91
81.3%
152/122
80.3%
47.4/60.7
141/180
.547/.554
194/152
78.4%
60.5/75.6
179/224
.523/.518
231/167
72.3%
72.1/83.1
214/246
.499/.455
256/172
67.2%
79.9/85.5
237/253
.461/.391
----189/141
74.5%
1.31/2.87
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart Sportsman II 200 Ported Smithberg Racing Iron210/-2.08/1.60
4.155
N/A72/-138/-195/-
57.4
170
.681
239/-
70.3
208
.626
266/-
78.3
232
.558
278/-
81.8
242
.486
287/-
84.5
250
.43
294/-
86.5
256
.385
--242
-
1.40
.421/.324
Dart 165 Iron Eagle165/-1.94/1.5067-126/108
85.7%
185/128
69.2%
62.6/72.4
185/215
.693/.62
221/136
61.5%
74.8/77
222/228
.621/.494
232/138
59.5%
78.5/78.1
233/231
.521/.401
-----191/128
66.8%
1.41
.393/.304
Dart 165 Iron Eagle165/651.94/1.50
4.03
No Pipe
72----210/138
65.7%
71/78.1
211/231
.472/.401
------
-
1.27/2.12
.393/.304
Dart 180 Iron Eagle180/752.02/1.60
4.03
No Pipe
65.9-139/114
82%
190/145
76.3%
59.3/72.1
176/214
.684/.659
218/164
75.2%
68/81.6
202/242
.588/.559
222/172
77.5%
69.3/85.5
205/253
.479/.469
218/174
79.8%
68/86.5
202/256
.392/.395
----197/154
77.9%
1.23/2.32
.409/.324
Dart 180 Iron Eagle Meaux Racing Out of Box180/752.02/1.60
4.00
No Pipe
N/A-127/102
80.3%
181/137
75.7%
56.5/68.1
167/202
.651/.622
212/161
75.9%
66.2/80.1
196/237
.572/.548
218/175
80.3%
68/87
202/258
.471/.477
219/180
82.2%
68.3/89.5
202/265
.394/.409
----191/151
78.9%
1.22/2.40
.409/.324
Dart 180 Iron Eagle Tri-Mark180/752.02/1.60N/A62/63
101%
127/115
90.6%
180/147
81.7%
56.2/73.1
166/217
.648/.668
209/163
78%
65.2/81.1
193/240
.564/.555
209/168
80.4%
65.2/83.6
193/248
.451/.458
209/171
81.8%
65.2/85
193/252
.376/.388
208/176
84.6%
64.9/87.5
192/259
.321/.343
---190/157
82.3%
1.16/2.35
.409/.324
Dart 180 Iron Eagle Ported Tri-Mark StealthN/A2.02/1.60N/A68/61
89.7%
134/112
83.6%
188/150
79.8%
58.7/74.6
174/221
.676/.681
228/170
74.6%
71.1/84.6
211/251
.615/.579
244/181
74.2%
76.1/90
226/267
.527/.493
248/184
74.2%
77.4/91.5
229/271
.446/.418
249/190
76.3%
77.7/94.5
230/280
.384/.37
---215/165
76.5%
-
.409/.324
Dart 180 Iron Eagle Ported Modern Cylinder HeadN/A2.02/1.60N/A68/62
91.2%
144/108
75%
201/158
78.6%
62.7/78.6
186/233
.723/.718
238/193
81.1%
74.3/96
220/284
.642/.657
252/201
79.8%
78.6/100
233/296
.544/.548
260/203
78.1%
81.1/101
240/299
.468/.461
249/190
76.3%
77.7/94.5
230/280
.384/.37
---224/176
78.3%
-
.409/.324
Dart 200 Iron Eagle200/752.02/1.60
4.03
No Pipe
65.9-129/114
88.4%
186/145
78%
58/72.1
172/214
.669/.659
229/164
71.6%
71.5/81.6
212/242
.618/.559
261/172
65.9%
81.4/85.5
241/253
.563/.469
252/174
69%
78.6/86.5
233/256
.453/.395
----211/154
72.8%
1.31/2.32
.409/.324
Dart 200 Iron Eagle Tri-Mark200/752.02/1.60N/A68/63
92.6%
134/115
85.8%
186/147
79%
58/73.1
172/217
.669/.668
226/163
72.1%
70.5/81.1
209/240
.61/.555
231/168
72.7%
72.1/83.6
214/248
.499/.458
231/171
74%
72.1/85
214/252
.416/.388
230/176
76.5%
71.8/87.5
213/259
.355/.343
---206/157
75.9%
1.16/2.35
.409/.324
Dart 200 Iron Eagle Ported Tri-Mark StealthN/A2.02/1.60N/A70/61
87.1%
135/112
83%
194/150
77.3%
60.5/74.6
179/221
.698/.681
232/170
73.3%
72.4/84.6
214/251
.626/.579
245/181
73.9%
76.4/90
227/267
.529/.493
253/184
72.7%
78.9/91.5
234/271
.455/.418
261/190
72.8%
81.4/94.5
241/280
.402/.37
---220/165
74.8%
-
.409/.324
Dart Iron Eagle CHPN/A2.05/1.60N/A65/59
90.8%
129/112
86.8%
182/139
76.4%
55.1/69.1
163/205
.645/.631
226/166
73.5%
68.5/82.6
203/245
.601/.565
258/178
69%
78.2/88.5
232/262
.549/.485
255/187
73.3%
77.3/93
229/276
.452/.425
----210/156
74.5%
-
.415/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart Iron Eagle 23 Deg CNC Rons Porting Service 220 Alum220/-2.05/1.6069-152/111
73%
203/149
73.4%
61.5/74.1
182/220
.72/.677
250/182
72.8%
75.7/90.5
224/268
.665/.62
288/215
74.7%
87.3/107
259/317
.613/.586
308/229
74.4%
93.3/114
276/337
.546/.52
317/246
77.6%
96/122
285/363
.482/.479
---253/189
74.6%
1.44
.415/.324
Dart Iron Eagle 23 Deg CNC Rons Porting Service 228 Alum228/-2.08/1.6068-143/111
77.6%
203/149
73.4%
59.7/74.1
177/220
.709/.677
251/182
72.5%
73.9/90.5
219/268
.658/.62
284/215
75.7%
83.6/107
248/317
.595/.586
313/229
73.2%
92.1/114
273/337
.547/.52
326/242
74.2%
95.9/120
284/357
.488/.471
---253/188
74.2%
1.43
.421/.324
Dart Iron Eagle 23 Deg CNC Rons Porting Service 238 Alum238/-2.10/1.6068-149/111
74.5%
212/149
70.3%
61.2/74.1
181/220
.734/.677
263/182
69.2%
75.9/90.5
225/268
.683/.62
296/215
72.6%
85.5/107
253/317
.615/.586
314/229
72.9%
90.7/114
269/337
.543/.52
322/242
75.2%
93/120
275/357
.478/.471
---259/188
72.5%
1.35
.425/.324
Dart Iron Eagle 23 Deg CNC Rons Porting Service 248 Alum248/-2.10/1.6072-146/111
76%
208/149
71.6%
60.1/74.1
178/220
.72/.677
256/182
71.1%
73.9/90.5
219/268
.664/.62
294/215
73.1%
84.9/107
252/317
.61/.586
324/229
70.7%
93.5/114
277/337
.561/.52
338/242
71.6%
97.6/120
289/357
.501/.471
---261/188
72%
1.36
.425/.324
Dart 215 Iron Eagle215/-2.055/1.60
4.03
No pipe
65.9-127/114
89.8%
178/145
81.5%
53.7/72.1
159/214
.629/.659
216/164
75.9%
65.1/81.6
193/242
.573/.559
249/172
69.1%
75.1/85.5
222/253
.528/.469
268/174
64.9%
80.8/86.5
239/256
.474/.395
271/-
81.7
242
.411
---218/154
-
1.26
.416/.324
Dart 230 Iron Eagle230/-2.08/1.60
4.155
No Pipe
65.9-129/115
89.1%
184/158
85.9%
54.2/78.6
160/233
.643/.718
231/185
80.1%
68/92
201/273
.605/.63
271/199
73.4%
79.8/99
236/293
.568/.542
296/205
69.3%
87.1/102
258/302
.517/.466
308/207
67.2%
90.6/103
269/305
.461/.403
308/-
90.6
269
.404
--247/178
-
1.34
.421/.324
Dart 230 Iron Eagle Ported Kelford CamsN/A2.08/1.60N/A73/59
80.8%
132/127
96.2%
186/171
91.9%
54.7/85
162/252
.65/.777
239/204
85.4%
70.3/101
208/301
.626/.695
275/224
81.5%
80.9/111
240/330
.576/.61
312/233
74.7%
91.8/116
272/343
.545/.529
319/239
74.9%
93.9/119
278/352
.478/.465
---244/200
81.9%
-
.421/.324
Dart 230 Iron Eagle Out of Box Steve SF600230/-2.08/1.60N/A64/46
71.9%
132/95
72%
185/135
73%
54.4/67.1
161/199
.646/.613
227/159
70%
66.8/79.1
198/234
.595/.542
243/168
69.1%
71.5/83.6
212/248
.509/.458
-----197/139
70.8%
1.06
.421/.324
Dart 230 Iron Eagle Ported Steve SF600N/A2.08/1.60N/A69/50
72.5%
133/102
76.7%
195/145
74.4%
57.4/72.1
170/214
.681/.659
247/177
71.7%
72.7/88
215/261
.647/.603
280/192
68.6%
82.4/95.5
244/283
.587/.523
-----214/154
72%
-
.421/.324
Dart 227 Iron Eagle Pro227/-2.08/1.60
-
No Pipe
72-131/96
73.3%
195/135
69.2%
57.4/67.1
170/199
.681/.613
248/169
68.1%
73/84.1
216/249
.65/.576
283/193
68.2%
83.3/96
247/284
.593/.526
297/208
70%
87.4/103
259/307
.519/.472
304/217
71.4%
89.5/108
265/320
.455/.422
---243/170
69.8%
1.34
.421/.324
Dart 200 Iron Eagle Platinum SF600200/-2.02/1.60
4.03
No Pipe
N/A-130/109
83.8%
194/158
81.4%
60.5/78.6
179/233
.698/.718
242/198
81.8%
75.5/98.5
224/292
.653/.675
274/208
75.9%
85.5/103
253/307
.591/.567
283/214
75.6%
88.3/106
262/315
.509/.486
-/219---225/177
79%
1.42
.409/.324
Dart 200 Iron Eagle Platinum CNC M2 Race Systems223/-2.055/1.60
4.03
N/A70/40
57.1%
151/96
63.6%
198/135
68.2%
59.7/67.1
177/199
.70/.613
248/175
70.6%
74.8/87
222/258
.658/.596
283/206
72.8%
85.3/102
253/304
.60/.561
301/225
74.8%
90.8/112
269/332
.532/.511
304/233
76.6%
91.7/116
272/343
.461/.454
---248/178
72.1%
1.36
.416/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart 200 Iron Eagle Platinum Ported Bullet Cylinder Heads217/902.05/1.606874/63
85.1%
144/111
77.1%
203/161
79.3%
61.5/80.1
182/237
.72/.731
247/188
76.1%
74.8/93.5
222/277
.657/.64
282/209
74.1%
85.4/104
253/308
.60/.57
291/218
74.9%
88.2/108
261/321
.516/.495
301/226
75.1%
91.2/112
270/333
.457/.44
---245/186
75.8%
1.39/2.51
.415/.324
Dart 215 Iron Eagle Platinum SF600215/752.05/1.60
4.03
No Pipe
N/A-136/109
80.1%
193/158
81.9%
58.5/78.6
173/233
.684/.718
239/198
82.8%
72.4/98.5
215/292
.635/.675
273/208
76.2%
82.7/103
245/307
.581/.567
289/214
74%
87.6/106
259/315
.512/.486
293/219
74.7%
88.8/109
263/323
.445/.426
---237/184
77.7%
1.36/2.92
.415/.324
Dart 215 Iron Eagle Platinum CHP215/-2.055/1.606563/56
88.9%
132/106
80.3%
180/133
73.9%
54.3/66.1
161/196
.637/.604
220/162
73.6%
66.3/80.6
197/239
.584/.552
251/178
70.9%
75.7/88.5
224/262
.533/.485
272/182
66.9%
82/90.5
243/268
.481/.413
----211/152
72.1%
1.27
.416/.324
Dart 215 Iron Eagle Platinum Weingartner Racing Back CutN/A2.055/1.60
4.155
No Pipe
N/A63/53
84.1%
141/103
73%
182/139
76.4%
54.9/69.1
163/205
.644/.631
215/168
78.1%
64.8/83.6
192/248
.57/.572
241/168
69.7%
72.7/83.6
215/248
.511/.458
250/197
78.8%
75.4/98
223/290
.442/.447
248/204
82.3%
74.8/101
222/301
.376/.397
235/208
88.5%
70.9/103
210/307
.312/.354
234/208
88.9%
70.6/103
209/307
.276/.315
-218/174
79.9%
-
.416/.324
Dart 215 Iron Eagle Platinum Competition Engines SF600215/-2.055/1.60
4.03
No Pipe
N/A-130/102
78.5%
181/132
72.9%
54.6/65.7
162/195
.64/.60
221/157
71%
66.6/78.1
197/231
.586/.535
248/175
70.6%
74.8/87
222/258
.526/.477
264/185
70.1%
79.6/92
236/273
.467/.42
268/191
71.3%
80.8/95
239/281
.406/.372
---219/157
71.8%
1.25
.416/.324
Dart 230 Iron Eagle Platinum SF600230/752.08/1.60
4.15
No Pipe
N/A-138/109
79%
201/158
78.6%
59.2/78.6
175/233
.702/.718
247/198
80.2%
72.7/98.5
215/292
.647/.675
280/208
74.3%
82.4/103
244/307
.587/.567
297/214
72.1%
87.4/106
259/315
.519/.486
306/219
71.6%
90.1/109
267/323
.458/.426
---245/184
75.3%
1.33/2.92
.421/.324
Dart 230 Iron Eagle Platinum Out of Box Weingartner RacingN/A2.08/1.60
4.125
No Pipe
N/A66/50
75.8%
130/115
88.5%
174/149
85.6%
51.2/74.1
152/220
.608/.677
226/178
78.8%
66.5/88.5
197/262
.592/.606
252/192
76.2%
74.2/95.5
220/283
.528/.523
277/201
72.6%
81.5/100
242/296
.484/.456
281/207
73.7%
82.7/103
245/305
.421/.403
280/211
75.4%
82.4/105
244/311
.367/.359
--231/179
77.3%
-
.421/.324
Dart 215 Platinum Ported Mike Jones Iron215/-2.08/1.60N/A73/55
75.3%
136/110
80.9%
194/155
79.9%
57.1/77.1
169/228
.678/.704
239/187
78.2%
70.3/93
208/276
.626/.637
279/213
76.3%
82.1/106
243/314
.585/.58
300/233
77.7%
88.3/116
262/343
.524/.529
313/239
76.4%
92.1/119
273/352
.469/.465
---244/190
77.8%
1.46
.421/.324
Dart Iron Eagle Platinum Meaux Racing Out of Box SF600237.3/-2.08/1.60
4.00
No Pipe
49-119/107
89.9%
172/142
82.6%
50.6/70.6
150/209
.601/.645
215/167
77.7%
63.3/83.1
187/246
.563/.569
248/184
74.2%
73/91.5
216/271
.52/.501
272/197
72.4%
80/98
237/290
.475/.447
276/205
74.3%
81.2/102
241/302
.413/.399
281/210
74.7%
82.7/104
245/309
.368/.358
--226/173
76.6%
-
.421/.324
Dart SHP 180 Alum180/752.02/1.60
-
No Pipe
64/72-139/114
82%
190/145
76.3%
59.3/72.1
176/214
.684/.659
218/164
75.2%
68/81.6
202/242
.588/.559
222/172
77.5%
69.3/85.5
205/253
.479/.469
218/174
79.8%
68/86.5
202/256
.392/.395
----197/154
77.9%
1.23/2.32
.409/.324
Dart SHP 200 Alum200/752.02/1.60
-
No Pipe
64/72-129/114
88.4%
186/145
78%
58/72.1
172/214
.669/.659
229/164
71.6%
71.5/81.6
212/242
.618/.559
261/172
65.9%
81.4/85.5
241/253
.563/.469
252/174
69%
78.6/86.5
233/256
.453/.395
----211/154
72.8%
1.31/2.32
.409/.324
Dart PRO1 180 Alum180/742.02/1.60
4.03
No Pipe
N/A-134/114
85.1%
187/145
77.5%
58.4/72.1
173/214
.673/.659
231/164
71%
72.1/81.6
214/242
.623/.559
257/172
66.9%
80.2/85.5
238/253
.555/.469
261/174
66.7%
81.4/86.5
241/256
.469/.395
264/175
66.3%
82.4/87
244/258
.407/.341
---222/157
70.8%
1.47/2.36
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart PRO1 200 Alum200/-2.02/1.60
-
No Pipe
64/72-129/114
88.4%
185/145
78.4%
57.7/72.1
171/214
.666/.659
229/164
71.6%
71.5/81.6
212/242
.618/.559
261/172
65.9%
81.4/85.5
241/253
.563/.469
263/174
66.2%
82.1/86.5
243/256
.473/.395
----213/154
72.1%
1.32
.409/.324
Dart PRO1 200 Bowl Cleanup Alum200/-2.05/1.60N/A--209/155
74.2%
63.3/77.1
188/228
.741/.704
237/193
81.4%
71.8/96
213/284
.63/.657
269/216
80.3%
81.5/107
241/318
.572/.589
281/222
79%
85.1/110
252/327
.498/.504
----249/197
78.9%
1.41
.415/.324
Dart PRO1 200 Ported Bullet Cylinder Heads Alum227/902.05/1.606979/56
70.9%
144/117
81.3%
200/161
80.5%
60.6/80.1
180/237
.709/.731
247/194
78.5%
74.8/96.5
222/286
.657/.661
281/217
77.2%
85.1/108
252/320
.598/.591
303/226
74.6%
91.8/112
272/333
.537/.513
311/230
74%
94.2/114
279/339
.473/.448
---248/191
77.1%
1.37/2.56
.415/.324
Dart PRO1 215 Alum215/-2.05/1.60
-
No pipe
64/72-127/114
89.8%
178/145
81.5%
53.9/72.1
160/214
.631/.659
216/164
75.9%
65.4/81.6
194/242
.574/.559
249/172
69.1%
75.4/85.5
224/253
.53/.469
268/174
64.9%
81.2/86.5
241/256
.475/.395
271/-
82.1
243
.412
---218/154
-
1.26
.415/.324
Dart PRO1 215 Out of Box Weingartner RacingN/A2.055/1.60
4.125
No Pipe
N/A65/52
80%
138/106
76.8%
198/138
69.7%
59.7/68.6
177/203
.70/.627
243/165
67.9%
73.3/82.1
217/243
.645/.562
273/178
65.2%
82.3/88.5
244/262
.579/.485
269/186
69.1%
81.1/92.5
240/274
.476/.422
268/189
70.5%
80.8/94
239/279
.406/.368
265/191
72.1%
79.9/95
237/281
.351/.325
--236/165
69.7%
-
.416/.324
Dart PRO1 215 Out of Box Jake AlumN/A2.055/1.60N/A63/52
82.5%
134/110
82.1%
184/135
73.4%
55.5/67.1
164/199
.651/.613
225/163
72.4%
67.8/81.1
201/240
.597/.555
255/181
71%
76.9/90
228/267
.541/.493
265/193
72.8%
79.9/96
237/284
.469/.438
255/199
78%
76.9/99
228/293
.386/.387
---220/164
74.4%
-
.416/.324
Dart PRO1 215 Ported Mike Start Alum215/-2.08/1.60
4.030
No Pipe
N/A80/68
85%
148/127
85.8%
200/180
90%
58.9/89.5
174/265
.699/.818
244/207
84.8%
71.8/103
213/305
.639/.705
281/220
78.3%
82.7/109
245/324
.589/.60
303/225
74.3%
89.2/112
264/332
.529/.511
308/232
75.3%
90.6/115
269/342
.461/.452
---247/199
80.3%
1.43
.421/.324
Dart PRO1 215 Ported Mike Stark Saenz 680 AlumN/A2.055/1.60
4.155
N/A74/58
78.4%
148/109
73.6%
210/147
70%
63.3/73.1
188/217
.743/.668
260/181
69.6%
78.4/90
232/267
.69/.617
296/203
68.6%
89.2/101
264/299
.628/.553
312/218
69.9%
94.1/108
279/321
.552/.495
318/227
71.4%
95.9/113
284/335
.482/.442
320/232
72.5%
96.5/115
286/342
.424/.395
321/234
72.9%
96.8/116
287/345
.378/.354
-273/194
71%
-
.416/.324
Dart PRO1 215 Meaux Racing Out of Box SF600 AlumN/A2.055/1.60
4.00
No Pipe
N/A-128/115
89.8%
181/148
81.8%
54.6/73.6
162/218
.64/.672
226/178
78.8%
68.1/88.5
202/262
.599/.606
257/192
74.7%
77.5/95.5
230/283
.545/.523
271/198
73.1%
81.7/98.5
242/292
.479/.45
266/201
75.6%
80.2/100
238/296
.403/.391
261/203
77.8%
78.7/101
233/299
.346/.346
--227/176
77.7%
-
.416/.324
Dart PRO1 215 Ported Meaux Racing Level 2 SF600 AlumN/A2.125/1.60
4.00
No Pipe
N/A-147/111
75.5%
208/167
80.3%
58.6/83.1
174/246
.711/.759
251/199
79.3%
70.8/99
210/293
.644/.678
285/214
75.1%
80.4/106
238/315
.585/.583
300/220
73.3%
84.6/109
251/324
.513/.50
308/224
72.7%
86.8/111
257/330
.451/.436
309/227
73.5%
87.1/113
258/335
.396/.387
--258/195
75.3%
-
.430/.324
Dart PRO1 215 Ported Meaux Racing SF600 Alum215/-2.125/1.60
4.125
No Pipe
N/A-147/111
75.5%
215/161
74.9%
60.6/80.1
180/237
.735/.731
260/204
78.5%
73.3/101
217/301
.667/.695
293/228
77.8%
82.6/113
245/336
.601/.621
304/240
78.9%
85.7/119
254/354
.52/.545
311/244
78.5%
87.7/121
260/360
.456/.475
319/243
76.2%
89.9/121
267/358
.409/.414
--264/204
77.4%
1.48
.430/.324
Dart PRO1 215 Ported Meaux Racing Welded Pushrod Area SF600 Alum215/-2.125/1.60
4.125
No Pipe
N/A-147/111
75.5%
215/161
74.9%
60.6/80.1
180/237
.735/.731
262/204
77.9%
73.9/101
219/301
.672/.695
293/228
77.8%
82.6/113
245/336
.601/.621
314/240
76.4%
88.5/119
262/354
.537/.545
319/244
76.5%
89.9/121
267/360
.468/.475
323/243
75.2%
91.1/121
270/358
.414/.414
--268/204
76.4%
1.50
.430/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart PRO1 227 CNC Full Port Alum227/852.08/1.625
4.155
No Pipe
66-158/117
74.1%
209/149
71.3%
61.5/71.8
182/213
.73/.666
257/182
70.8%
75.6/87.8
224/260
.673/.61
293/211
72%
86.2/102
255/301
.614/.566
302/220
72.8%
88.9/106
263/314
.528/.492
309/226
73.1%
90.9/109
269/323
.463/.433
314/232
73.9%
92.4/112
274/331
.411/.389
--263/191
72.6%
1.38/2.73
.421/.329
Dart PRO1 Ported Alum238/-2.125/1.60
-
No Pipe
N/A-147/113
76.9%
199/155
77.9%
56.1/77.1
166/228
.681/.704
250/184
73.6%
70.5/91.5
209/271
.641/.627
288/204
70.8%
81.2/101
241/301
.591/.556
306/216
70.6%
86.3/107
256/318
.523/.491
----238/174
73.3%
1.29
.430/.324
Dart PRO1 230 Alum230/-2.08/1.60
-
No Pipe
64/72-129/115
89.1%
184/158
85.9%
54.2/78.6
160/233
.643/.718
231/185
80.1%
68/92
201/273
.605/.63
271/199
73.4%
79.8/99
236/293
.568/.542
296/205
69.3%
87.1/102
258/302
.517/.466
308/207
67.2%
90.6/103
269/305
.461/.403
---237/178
75.3%
1.34
.421/.324
Dart PRO1 230 Dr Js Performance AlumN/A2.08/1.60
-
Pipe
N/A61/51
83.6%
115/103
89.6%
168/135
80.4%
49.4/67.1
146/199
.587/.613
216/166
76.9%
63.6/82.6
188/245
.566/.565
254/187
73.6%
74.8/93
221/276
.532/.51
258/202
78.3%
75.9/100
225/298
.451/.459
262/212
80.9%
77.1/105
228/312
.392/.413
---212/168
78.9%
-
.421/.324
Dart PRO1 230 CNC Dr Js Performance AlumN/A2.08/1.60
-
Pipe
N/A71/67
94.4%
141/120
85.1%
207/162
78.3%
60.9/80.6
181/239
.723/.736
257/195
75.9%
75.6/97
224/287
.673/.664
289/219
75.8%
85.1/109
252/323
.606/.597
300/232
77.3%
88.3/115
262/342
.524/.527
309/244
79%
90.9/121
269/360
.463/.475
---251/195
78%
-
.421/.324
Dart PRO1 230 Meaux Racing Out of Box SF600 AlumN/A2.055/1.60
4.00
No Pipe
N/A-123/117
95.1%
179/148
82.7%
54/73.6
160/218
.633/.672
223/175
78.5%
67.2/87
199/258
.591/.596
257/193
75.1%
77.5/96
230/284
.545/.526
279/193
69.2%
84.1/96
249/284
.493/.438
267/205
76.8%
80.5/102
239/302
.405/.399
266/208
78.2%
80.2/103
238/307
.353/.354
--228/177
77.7%
-
.416/.324
Dart PRO1 Ported 3V Performance AlumN/A2.08/-N/A80/-145/-210/-
61.8
183
.734
267/-
78.6
233
.70
305/-
89.8
266
.639
327/-
96.2
285
.571
338/-
99.5
295
.506
344/-
101
300
.451
346/-
102
302
.403
-285
-
-
.421
Dart Platinum 23 Deg CNC Rons Porting Service 220 Alum220/-2.05/1.6069-152/111
73%
203/149
73.4%
61.5/74.1
182/220
.72/.677
250/182
72.8%
75.7/90.5
224/268
.665/.62
288/215
74.7%
87.3/107
259/317
.613/.586
308/229
74.4%
93.3/114
276/337
.546/.52
317/242
76.3%
96/120
285/357
.482/.471
---253/188
74.3%
1.44
.415/.324
Dart Platinum 23 Deg CNC Rons Porting Service 238 Alum238/-2.10/1.6068-143/111
77.6%
203/149
73.4%
58.6/74.1
174/220
.703/.677
251/182
72.5%
72.5/90.5
215/268
.651/.62
284/215
75.7%
82/107
243/317
.59/.586
313/229
73.2%
90.4/114
268/337
.542/.52
326/242
74.2%
94.1/120
279/357
.484/.471
---253/188
74.2%
1.37
.425/.324
Dart Platinum 23 Deg CNC Rons Porting Service 240 Alum240/-2.125/1.6068-143/111
77.6%
203/149
73.4%
57.2/74.1
170/220
.694/.677
254/182
71.7%
71.6/90.5
212/268
.651/.62
294/215
73.1%
82.9/107
246/317
.603/.586
317/229
72.2%
89.4/114
265/337
.542/.52
328/242
73.8%
92.5/120
274/357
.481/.471
---257/188
73.3%
1.37
.430/.324
Dart 23 Deg 220-225 Super Mod Alum225/882.08/1.625
4.155
No Pipe
N/A-138/122
88.4%
201/168
83.6%
59.2/81
175/240
.702/.751
253/192
75.9%
74.5/92.6
221/274
.663/.644
279/207
74.2%
82.1/99.8
243/296
.585/.555
284/211
74.3%
83.6/102
248/301
.496/.472
282/213
75.5%
83/103
246/304
.422/.408
---240/186
77.5%
1.26/2.42
.421/.329
Dart 23 Deg 220-232 Full Port Alum232/982.08/1.60
4.155
No Pipe
N/A-144/121
84%
208/169
81.3%
61.2/84.1
181/249
.727/.768
258/216
83.7%
75.9/107
225/318
.676/.736
296/238
80.4%
87.1/118
258/351
.621/.649
311/244
78.5%
91.5/121
271/360
.543/.554
316/250
79.1%
93/124
276/368
.473/.487
---256/206
80.8%
1.36/2.55
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart 23 Deg 220 Full Port No back Cut SF600 Alum240/-2.10/1.60
-
No Pipe
N/A-147/117
79.6%
202/189
93.6%
58.3/94
173/279
.699/.858
253/220
87%
73/109
216/324
.657/.749
287/236
82.2%
82.9/117
246/348
.596/.643
310/246
79.4%
89.5/122
265/363
.536/.559
320/250
78.1%
92.4/124
274/368
.475/.487
324/251
77.5%
93.5/125
277/370
.42/.428
--263/216
81.9%
1.35
.425/.324
Dart 220 RR Full Port Alum239/1032.10/1.60
-
No Pipe
N/A-154/121
78.6%
223/168
75.3%
64.4/83.6
191/248
.772/.763
276/202
73.2%
79.7/100
236/298
.716/.688
311/229
73.6%
89.8/114
266/337
.646/.624
319/237
74.3%
92.1/118
273/349
.552/.538
323/243
75.2%
93.3/121
276/358
.479/.473
---268/200
74.7%
1.35/2.36
.425/.324
Dart 220 RR CFE Full Port Alum248/1062.10/1.60
-
No Pipe
N/A-131/115
87.8%
199/154
77.4%
57.5/76.6
170/227
.689/.699
254/183
72%
73.3/91
217/270
.659/.623
289/220
76.1%
83.4/109
247/324
.60/.60
304/233
76.6%
87.8/116
260/343
.526/.529
304/240
78.9%
87.8/119
260/354
.451/.467
---247/191
77.3%
1.23/2.26
.425/.324
Dart 220 Race Series Alum248/-2.10/1.60
-
No Pipe
62-147/117
79.6%
202/189
93.6%
58.3/94
173/279
.699/.858
253/220
87%
73/109
216/324
.657/.749
287/236
82.2%
82.9/117
246/348
.596/.643
310/246
79.4%
89.5/122
265/363
.536/.559
320/250
78.1%
92.4/124
274/368
.475/.487
324/251
77.5%
93.5/125
277/370
.42/.428
--263/216
81.9%
1.31
.425/.324
Dart 18 Deg CNC Out of Box Weingartner RacingN/A2.14/1.60
4.125
No Pipe
N/A80/52
65%
150/125
83.3%
220/161
73.2%
61.2/80.1
181/237
.747/.731
273/203
74.4%
75.9/101
225/299
.695/.692
311/226
72.7%
86.5/112
256/333
.634/.616
349/240
68.8%
97/119
287/354
.593/.545
338/248
73.4%
94/123
278/365
.492/.483
---274/201
73.3%
-
.433/.324
Dart 18 Deg Super Mod SF600246/1052.15/1.60
-
No Pipe
N/A-165/131
79.4%
210/165
78.6%
57.8/82.1
171/243
.71/.749
270/195
72.2%
74.4/97
220/287
.684/.664
321/235
73.2%
88.4/117
262/346
.651/.64
353/249
70.5%
97.2/124
288/367
.597/.565
357/253
70.9%
98.3/126
291/373
.517/.492
---279/205
73.3%
1.45/2.41
.435/.324
Dart 18 Deg Full Port No Back Cut SF600 Alum252/1052.15/1.60
4.155
No Pipe
N/A-132/101
76.5%
194/144
74.2%
53.4/71.6
158/212
.656/.654
252/198
78.6%
69.4/98.5
206/292
.639/.675
305/217
71.1%
84/108
249/320
.619/.591
347/227
65.4%
95.6/113
283/335
.586/.516
365/241
66%
101/120
298/355
.529/.469
358/241
67.3%
98.6/120
292/355
.454/.41
--279/196
70.1%
1.45/2.30
.435/.324
Dart 18 Deg Full Port No Back Cut SF600 Alum263/1082.18/1.60
4.155
No Pipe
N/A-183/131
71.6%
243/169
69.5%
65.1/84.1
193/249
.81/.768
295/225
76.3%
79/112
234/332
.738/.766
342/246
71.9%
91.6/122
271/363
.684/.67
364/263
72.3%
97.5/131
289/388
.607/.597
368/268
72.8%
98.6/133
292/395
.526/.522
363/272
74.9%
97.3/135
288/401
.454/.463
--308/225
72.9%
1.40/2.52
.441/.324
Dart 18 Deg Full Port SF600275/1102.18/1.60
-
No Pipe
N/A-165/131
79.4%
210/173
82.4%
56.3/86
167/255
.70/.786
272/230
84.6%
72.9/114
216/339
.68/.784
326/249
76.4%
87.3/124
259/367
.652/.679
360/263
73.1%
96.4/131
286/388
.60/.597
378/270
71.4%
101/134
300/398
.54/.526
---285/219
76.9%
1.37/2.45
.441/.324
Dart 18 Deg Alum257/-2.15/1.60
4.155
No Pipe
N/A-145/114
78.6%
211/174
82.5%
58.1/86.5
172/256
.713/.79
270/217
80.4%
74.4/108
220/320
.684/.739
321/241
75.1%
88.4/120
262/355
.651/.657
346/251
72.5%
95.3/125
282/370
.585/.57
350/258
73.7%
96.4/128
286/380
.507/.502
340/262
77.1%
93.7/130
277/386
.431/.446
--283/217
76.5%
1.36
.435/.324
Dart 18 Deg Alum270/-2.18/1.60
4.155
No Pipe
N/A-162/114
70.4%
232/174
75%
62.2/86.5
184/256
.773/.79
293/217
74.1%
78.5/108
233/320
.733/.739
332/241
72.6%
88.9/120
264/355
.664/.657
359/251
69.9%
96.2/125
285/370
.598/.57
366/258
70.5%
98.1/128
291/380
.523/.502
366/262
71.6%
98.1/130
291/386
.458/.446
--301/217
71.9%
1.36
.441/.324
Dart 18 Deg AlumN/A2.18/1.60
-
No Pipe
62-139/111
79.9%
192/154
80.2%
51.4/76.6
152/227
.64/.699
250/216
86.4%
67/107
198/318
.625/.736
304/242
79.6%
81.4/120
241/357
.608/.66
346/254
73.4%
92.7/126
275/374
.577/.577
373/258
69.2%
99.9/128
296/380
.533/.502
380/262
68.9%
102/130
302/386
.475/.446
--283/214
75.5%
-
.441/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart 18 Deg Ported Chris Frank AlumN/A-
4.175
No Pipe
N/A-141/103
73%
238/156
65.5%
-
298/206
69.1%
-
348/231
66.4%
-
381/242
63.5%
-
397/250
63%
-
408/262
64.2%
-
415/269
64.8%
-
420/273
65%
-
338/221
65.4%
Dart 16 Deg Full Port Intake Back Cut 45/39/32 SF600 Alum263/1082.15/1.60
-
No Pipe
N/A-145/119
82.1%
219/173
79%
60.3/86
179/255
.74/.786
280/213
76.1%
77.1/106
229/314
.71/.726
325/240
73.8%
89.5/119
265/354
.659/.654
358/257
71.8%
98.6/128
292/379
.605/.584
379/264
69.7%
104/131
309/389
.549/.514
383/268
70%
105/133
313/395
.485/.456
--298/219
73.4%
1.46/2.48
.435/.324
Dart 16 Deg Full Port Lrg No Back Cut SF600 Alum281/1192.20/1.625
-
No Pipe
N/A-163/106
65%
228/149
65.4%
60/71.8
178/213
.753/.666
286/191
66.8%
75.2/92.1
223/273
.709/.641
340/219
64.4%
89.4/106
265/313
.674/.588
377/234
62.1%
99.2/113
294/334
.623/.523
387/247
63.8%
102/119
302/353
.548/.473
392/251
64%
103/121
306/359
.486/.421
--310/200
64.3%
1.40/2.11
.446/.329
Dart 16 Deg Ported Jones Engineering 58/107 Alum267/-2.18/1.6048-161/101
62.7%
231/149
64.5%
61.9/74.1
183/220
.77/.677
291/211
72.5%
78/105
231/311
.728/.719
337/237
70.3%
90.3/118
268/349
.674/.646
360/253
70.3%
96.4/126
286/373
.60/.575
371/263
70.9%
99.4/131
295/388
.53/.512
375/268
71.5%
100/133
298/395
.469/.456
--304/212
69.7%
1.40
.441/.324
Dart 15 Deg Small Alum276/1112.15/1.60
-
No Pipe
51------392/-
108
320
.568
-/263---
-
1.42
.435/.324
Dart 15 Deg Large Alum281/1132.20/1.60
-
No Pipe
51-----------
-
-
.446/.324
Dart High Port 15 Deg - Darin Morgan SF600 AlumN/A2.18/1.625
-
No Pipe
N/A-136/111
81.6%
212/157
74.1%
56.8/75.7
168/224
.707/.702
281/214
76.2%
75.3/103
223/306
.703/.718
339/243
71.7%
90.8/117
269/347
.678/.652
379/258
68.1%
102/124
301/369
.632/.577
394/265
67.3%
106/128
313/379
.563/.508
396/271
68.4%
106/131
314/387
.495/.454
404/273
67.6%
108/132
321/390
.449/.407
-/275318/224
70.5%
-
.441/.329
Dart 12.5 Deg Ported Jones Engineering 36/102 I-45 E-45 Alum282/-2.18/1.62546-147/110
74.8%
225/159
70.7%
60.3/76.7
179/227
.75/.711
288/218
75.7%
77.2/105
229/311
.72/.731
344/246
71.5%
92.2/119
273/351
.688/.66
386/267
69.2%
103/129
306/381
.643/.597
390/274
70.3%
104/132
310/391
.557/.525
---297/212
71.6%
1.38
.441/.329
Dart Little Chief 11 Deg 275 I-50 E-55 SF1020 Alum275/1082.18/1.55
4.155
No Pipe
N/A-162/138
85.2%
240/186
77.5%
64.3/98.6
191/292
.80/.872
306/241
78.8%
82/128
243/378
.765/.847
350/266
76%
93.8/141
278/418
.70/.748
372/274
73.7%
99.7/145
295/430
.62/.642
376/278
73.9%
101/147
298/437
.537/.559
384/280
72.9%
103/148
305/440
.48/.492
389/282
72.5%
104/149
309/443
.432/.441
392/282
71.9%
105/149
311/443
.392/.397
330/247
75%
1.43/2.61
.441/.314
Dart Little Chief 11 Deg 315 I-55 E-55 SF1020 Alum315/1082.23/1.55
4.155
No Pipe
N/A-158/138
87.3%
235/186
79.1%
60.2/98.6
178/292
.766/.872
300/241
80.3%
76.8/128
228/378
.733/.847
352/266
75.6%
90.1/141
267/418
.688/.748
385/274
71.2%
98.6/145
292/430
.627/.642
401/278
69.3%
103/147
304/437
.56/.559
405/280
69.1%
104/148
307/440
.495/.492
410/282
68.8%
105/149
311/443
.445/.441
415/282
68%
106/149
315/443
.406/.397
340/247
72.8%
1.32/2.61
.452/.314
Dart Little Chief 11 Deg 315 I-55 E-55 SF1020 Alum330/1082.23/1.55
4.155
No Pipe
N/A-143/138
96.5%
233/186
79.8%
59.7/98.6
177/292
.759/.872
304/241
79.3%
77.8/128
231/378
.743/.847
360/266
73.9%
92.2/141
273/418
.704/.748
393/274
69.7%
101/145
298/430
.64/.642
405/278
68.6%
104/147
307/437
.566/.559
418/280
67%
107/148
317/440
.511/.492
425/282
66.4%
109/149
322/443
.462/.441
431/282
65.4%
110/149
327/443
.421/.397
346/247
71.6%
1.31/2.61
.452/.314
Dart Little Chief 11 Deg Ported MBE Alum345/-2.25/1.60
4.155
No Pipe
35-46-140/101
72.1%
222/140
63.1%
55.8/69.6
165/206
.717/.636
298/186
62.4%
74.9/92.5
222/274
.722/.634
360/236
65.6%
90.5/117
268/348
.698/.643
409/259
63.3%
103/129
305/382
.661/.588
429/268
62.5%
108/133
320/395
.594/.522
441/274
62.1%
111/136
329/404
.534/.467
457/-
115
341
.492
468/-
118
349
.453
358/209
-
1.36
.456/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Dart Little Chief 11 Deg Ported MBE I-55 E-55 SF600 Alum347/-2.27/1.55
4.155
No Pipe
N/A-151/101
66.9%
227/140
61.7%
56.1/74.2
166/220
.727/.656
303/186
61.4%
74.9/98.6
222/292
.728/.654
365/236
64.7%
90.2/125
267/371
.701/.664
413/259
62.7%
102/137
302/407
.661/.607
438/268
61.2%
108/142
321/421
.601/.539
444/274
61.7%
110/145
325/430
.533/.482
456/276
60.5%
113/146
334/433
.487/.431
462/-
114
338
.444
362/218
-
1.33
.460/.314
Dart 9 Deg Alum299/2152.20/1.625
-
No Pipe
3870/54
77.1%
153/103
67.3%
227/156
68.7%
59.7/75.2
177/223
.75/.698
300/209
69.7%
78.9/101
234/299
.743/.701
360/243
67.5%
94.7/117
281/347
.714/.652
406/266
65.5%
107/128
316/380
.671/.595
421/279
66.3%
111/135
328/399
.596/.535
---311/209
67.3%
1.41/1.30
.446/.329
Dart 9 Deg AlumN/A2.21/1.625
4.40
No Pipe
45--225/162
72%
58.7/78.1
174/231
.74/.724
298/215
72.1%
77.7/104
230/307
.735/.721
348/245
70.4%
90.7/118
269/350
.687/.657
375/260
69.3%
97.8/125
290/371
.617/.581
388/267
68.8%
101/129
300/381
.547/.512
394/275
69.8%
103/133
304/393
.486/.461
--338/237
70.2%
-
.448/.329
Edelbrock E-Street 5073, 5089 SF1020 Alum185/602.02/1.6064/7063/51
81%
125/99
79.2%
182/131
72%
56.8/65.2
168/193
.655/.595
225/153
68%
70.2/76.1
208/225
.607/.521
248/163
65.7%
77.4/81.1
229/240
.535/.444
249/168
67.5%
77.7/83.6
230/248
.448/.382
----206/143
69.4%
1.35/2.80
.409/.324
Edelbrock 6071, 6073 Alum OLD170/602.02/1.607072/61
84.7%
134/105
78.4%
188/140
74.5%
58.7/69.6
174/206
.676/.636
224/160
71.4%
69.9/79.6
207/236
.604/.545
233/172
73.8%
72.7/85.5
215/253
.503/.469
233/179
76.8%
72.7/89
215/264
.419/.407
----202/151
74.7%
1.37/2.98
.409/.324
Edelbrock 60719 Performer RPM Straight Plug Alum170/602.02/1.607073/61
83.6%
140/108
77.1%
200/144
72%
62.4/71.6
185/212
.72/.654
238/163
68.5%
74.3/81.1
220/240
.642/.555
244/175
71.7%
76.1/87
226/258
.527/.477
244/183
75%
76.1/91
226/270
.439/.416
----213/155
72.5%
1.44/3.05
.409/.324
Edelbrock 60739 Performer RPM Angled Plug Alum170/602.02/1.607073/61
83.6%
140/108
77.1%
200/144
72%
62.4/71.6
185/212
.72/.654
238/163
68.5%
74.3/81.1
220/240
.642/.555
244/175
71.7%
76.1/87
226/258
.527/.477
244/183
75%
76.1/91
226/270
.439/.416
----213/155
72.5%
1.44/3.05
.409/.324
Edelbrock 60859, 60879 Performer Centerbolt SF1020 Alum165/602.02/1.606064/54
84.4%
122/96
78.7%
177/124
70.1%
55.2/61.7
164/183
.637/.563
217/147
67.7%
67.7/73.1
201/217
.586/.501
229/166
72.5%
71.5/82.6
212/245
.494/.452
232/175
75.4%
72.4/87
214/258
.417/.397
----195/142
72.5%
1.41/2.92
.409/.324
Edelbrock 60899, 60909, 60999 Performer RPM Alum170/602.02/1.606467/58
86.6%
130/108
83.1%
183/144
78.7%
57.1/71.6
169/212
.658/.654
226/169
74.8%
70.5/84.1
209/249
.61/.576
229/175
76.4%
71.5/87
212/258
.494/.477
232/182
78.4%
72.4/90.5
214/268
.417/.413
----200/156
77.8%
1.36/3.03
.409/.324
Edelbrock Performer RPM 60899, 60999 SF1020 Alum185/652.02/1.606466/55
83.3%
129/98
76%
188/131
69.7%
58.7/65.2
174/193
.676/.595
228/152
66.7%
71.1/75.6
211/224
.615/.518
240/162
67.5%
74.9/80.6
222/239
.518/.441
241/168
69.7%
75.2/83.6
223/248
.434/.382
----205/142
69.3%
1.30/2.58
.409/.324
Edelbrock Performer RPM 608979 SCCA SF1020 Alum185/651.94/1.556461/51
83.6%
127/95
74.8%
185/118
63.8%
62.6/62.5
185/185
.693/.553
217/131
60.4%
73.4/69.4
218/206
.61/.461
229/137
59.8%
77.5/72.6
230/215
.515/.385
237/140
59.1%
80.2/74.2
238/220
.444/.328
----199/124
62.4%
1.28/2.15
.393/.314
Edelbrock Performer RPM '86 earlier 60759 SF1020 Alum185/652.02/1.6064/7066/52
78.8%
127/97
76.4%
185/127
68.6%
57.7/63.2
171/187
.666/.577
230/146
63.5%
71.8/72.6
213/215
.621/.497
238/156
65.5%
74.3/77.6
220/230
.514/.425
239/162
67.8%
74.6/80.6
221/239
.43/.368
----204/138
67.5%
1.29/2.49
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Edelbrock 60899 Performer RPM Alum CHP185/632.02/1.606460/48
80%
125/96
76.8%
181/134
74%
56.5/66.6
167/197
.651/.609
223/161
72.2%
69.6/80.1
206/237
.602/.548
244/176
72.1%
76.1/87.5
226/259
.527/.48
-----193/142
73.4%
1.32/2.79
.409/.324
Edelbrock 6089 NPS AlumN/A2.02/1.60
4.016
No Pipe
N/A65/54
83.1%
127/105
82.7%
180/137
76.1%
56.2/68.1
166/202
.648/.622
219/155
70.8%
68.3/77.1
202/228
.591/.528
240/163
67.9%
74.9/81.1
222/240
.518/.444
236/167
70.8%
73.6/83.1
218/246
.425/.379
----200/145
72.6%
-
.409/.324
Edelbrock 60979 E-Tec 170 SF1020 Alum170/701.94/1.556464/54
84.4%
130/104
80%
186/140
75.3%
62.9/74.2
186/220
.697/.656
220/169
76.8%
74.4/89.6
221/265
.618/.594
232/183
78.9%
78.5/97
233/287
.521/.515
238/190
79.8%
80.5/101
239/298
.446/.445
----201/157
78.1%
1.40/2.71
.393/.314
Edelbrock 60989 E-Tec 200 SF1020 Alum200/802.02/1.606467/57
85.1%
122/110
90.2%
175/153
87.4%
54.6/76.1
162/225
.63/.695
223/182
81.6%
69.6/90.5
206/268
.602/.62
252/196
77.8%
78.6/97.5
233/289
.544/.534
259/204
78.8%
80.8/101
239/301
.466/.463
265/207
78.1%
82.7/103
245/305
.409/.403
---216/175
81.2%
1.33/2.59
.409/.324
Edelbrock E-210 Out of Box Weingartner Racing Alum210/-2.08/1.60
4.155
No Pipe
N/A64/41
64.1%
132/88
66.7%
179/124
69.3%
52.7/61.7
156/183
.625/.563
220/147
66.8%
64.7/73.1
192/217
.576/.501
246/163
66.3%
72.4/81.1
215/240
.516/.444
259/172
66.4%
76.2/85.5
226/253
.452/.391
264/175
66.3%
77.7/87
230/258
.395/.341
263/177
67.3%
77.4/88
229/261
.345/.301
259/178
68.7%
76.2/88.5
226/262
.302/.269
259/-
76.2
226
.271
231/153
-
1.26
.421/.324
Edelbrock/ Chapman 61049 Alum236/1002.135/1.625
-
No Pipe
5271/54
76.1%
159/108
67.9%
224/182
81.3%
62.6/87.8
185/260
.762/.814
273/222
81.3%
76.3/107
226/317
.697/.745
305/238
78%
85.2/115
252/340
.623/.639
314/250
79.6%
87.7/121
260/357
.534/.559
323/260
80.5%
90.2/125
267/371
.471/.498
---266/210
78.8%
1.37/2.60
.432/.329
Edelbrock/ Chapman Victor 18 Deg 61069 Alum252/1002.18/1.6255272/54
75%
161/108
67.1%
232/182
78.4%
62.2/87.8
184/260
.773/.814
286/222
77.6%
76.6/107
227/317
.715/.745
321/238
74.1%
86/115
255/340
.642/.639
342/250
73.1%
91.6/121
271/357
.57/.559
345/260
75.4%
92.4/125
274/371
.493/.498
---281/210
74.7%
1.37/2.60
.441/.329
Edelbrock 23 Deg. CNC Rons Porting Service Alum236/-2.10/1.6071-168/116
69%
223/164
73.5%
64.4/81.6
191/242
.772/.745
281/210
74.7%
81.1/104
240/309
.729/.715
308/232
75.3%
88.9/115
263/342
.64/.632
322/238
73.9%
93/118
275/351
.557/.541
326/240
73.6%
94.1/119
279/354
.484/.467
328/242
73.8%
94.7/120
281/357
.426/.412
--279/206
73.7%
1.39
.425/.324
Edelbrock 18 Deg. CNC Rons Porting Service Alum278/-2.18/1.62553-150/125
83.3%
220/180
81.8%
58.9/86.8
175/257
.733/.805
281/224
79.7%
75.3/108
223/320
.703/.751
331/240
72.5%
88.7/116
263/343
.662/.644
362/248
68.5%
97/120
287/354
.603/.555
380/251
66.1%
102/121
302/359
.543/.481
385/254
66%
103/122
306/363
.481/.426
--301/217
72.2%
1.38
.441/.329
Edelbrock 18 Deg. Ported Chad Speier I-50 E-50 AlumN/A2.18/1.60
4.155
2" Pipe
53-136/102
75%
212/148
69.8%
56.8/73.6
168/218
.707/.672
275/192
69.8%
73.7/95.5
218/283
.688/.654
325/229
70.5%
87.1/114
258/337
.65/.624
362/257
71%
97/128
287/379
.603/.584
383/268
70%
103/133
304/395
.547/.522
393/275
70%
105/137
312/405
.491/.468
395/278
70.4%
106/138
314/410
.439/.421
396/281
71%
106/140
314/414
.396/.383
320/226
70.6%
-
.441/.324
Edelbrock/ Chapman Victor 18 Deg 61089 Alum256/1002.18/1.6255272/54
75%
161/108
67.1%
233/182
78.1%
62.4/87.8
185/260
.777/.814
286/222
77.6%
76.6/107
227/317
.715/.745
321/238
74.1%
86/115
255/340
.642/.639
344/250
72.7%
92.2/121
273/357
.573/.559
348/260
74.7%
93.2/125
276/371
.497/.498
---282/210
74.4%
1.36/2.60
.441/.329
Edelbrock/ Chapman Victor 18 Deg 61109 Alum236/1002.125/1.6256571/54
76.1%
159/108
67.9%
224/182
81.3%
63.2/87.8
187/260
.766/.814
273/222
81.3%
77/107
228/317
.70/.745
305/238
78%
86/115
255/340
.626/.639
314/250
79.6%
88.5/121
262/357
.537/.559
323/260
80.5%
91.1/125
270/371
.473/.498
---266/210
78.8%
1.37/2.60
.430/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Edelbrock 61119 Victor 15 Deg. Ported Chapman Alum283/1002.18/1.625
-
No Pipe
4363/48
76.2%
137/113
82.5%
215/177
82.3%
57.6/85.3
171/253
.717/.792
281/217
77.2%
75.3/105
223/310
.703/.728
327/240
73.4%
87.6/116
260/343
.654/.644
363/254
70%
97.3/122
288/363
.605/.568
381/260
68.2%
102/125
302/371
.544/.498
---284/210
74%
1.35/2.60
.441/.329
Edelbrock 61129 Alum252/1002.18/1.6256572/54
75%
161/108
67.1%
232/182
78.4%
62.2/87.8
184/260
.773/.814
286/222
77.6%
76.6/107
227/317
.715/.745
321/238
74.1%
86/115
255/340
.642/.639
342/250
73.1%
91.6/121
271/357
.57/.559
345/260
75.4%
92.4/125
274/371
.493/.498
---281/210
74.7%
1.37/2.60
.441/.329
Edelbrock 61139 Victor 15 Deg. Ported Chapman Alum317/1002.25/1.625
-
No Pipe
4570/49
70%
142/118
83.1%
216/175
81%
54.3/84.4
161/250
.698/.783
280/212
75.7%
70.4/102
209/303
.678/.711
328/241
73.5%
82.5/116
244/344
.636/.647
368/257
69.8%
92.6/124
274/367
.594/.575
398/267
67.1%
100/129
297/381
.551/.512
404/271
67.1%
102/131
301/387
.489/.454
--305/220
72.1%
1.27/2.71
.456/.329
Edelbrock 15 Deg. CNC Rons Porting Service Alum272/-2.18/1.62545-153/110
71.9%
228/184
80.7%
61.1/88.7
181/263
.76/.823
292/229
78.4%
78.2/110
232/327
.73/.768
334/258
77.2%
89.5/124
265/369
.668/.692
366/268
73.2%
98.1/129
291/383
.61/.599
382/274
71.7%
102/132
303/391
.546/.525
---293/221
75.4%
1.40
.441/.329
Edelbrock 15 Deg CNC RFD Alum522.25/1.625N/A-156/120
76.9%
228/180
78.9%
57.3/86.8
170/257
.736/.805
304/220
72.4%
76.5/106
227/314
.736/.738
363/246
67.8%
91.3/119
271/351
.703/.66
398/258
64.8%
100/124
297/369
.643/.577
410/269
65.6%
103/130
306/384
.568/.516
418/273
65.3%
105/132
311/390
.506/.458
422/280
66.4%
106/135
314/400
.454/.417
-337/231
68.4%
8.12
.456/.329
Edelbrock 61149 Alum256/1002.18/1.6256572/54
75%
161/108
67.1%
233/182
78.1%
62.4/87.8
185/260
.777/.814
286/222
77.6%
76.6/107
227/317
.715/.745
321/238
74.1%
86/115
255/340
.642/.639
344/250
72.7%
92.2/121
273/357
.573/.559
348/260
74.7%
93.2/125
276/371
.497/.498
---282/210
74.4%
1.36/2.60
.441/.329
Edelbrock/ Chapman Victor 18 Deg 61159 Alum246/1002.15/1.6255272/54
75%
161/108
67.1%
232/182
78.4%
63.9/87.8
189/260
.784/.814
286/222
77.6%
78.8/107
233/317
.725/.745
321/238
74.1%
88.4/115
262/340
.651/.639
340/250
73.5%
93.7/121
277/357
.575/.559
342/260
76%
94.2/125
279/371
.495/.498
---280/210
74.9%
1.39/2.60
.435/.329
Edelbrock 61169 Alum266/1002.18/1.6255271/54
76.1%
151/108
71.5%
226/182
80.5%
60.5/87.8
179/260
.753/.814
271/222
81.9%
72.6/107
215/317
.678/.745
323/238
73.7%
86.5/115
256/340
.646/.639
350/250
71.4%
93.8/121
278/357
.583/.559
355/260
73.2%
95.1/125
282/371
.507/.498
---279/210
75.2%
1.33/2.60
.441/.329
Edelbrock 61179 Alum270/1052.18/1.6254771/51
71.8%
151/114
75.5%
226/180
79.6%
60.5/86.8
179/257
.753/.805
271/213
78.6%
72.6/103
215/304
.678/.714
323/240
74.3%
86.5/116
256/343
.646/.644
350/248
70.9%
93.8/120
278/354
.583/.555
355/255
71.8%
95.1/123
282/364
.507/.489
---279/208
74.6%
1.31/2.43
.441/.329
Edelbrock 61189 Alum246/1002.18/1.6256572/54
75%
161/108
67.1%
232/182
78.4%
62.2/87.8
184/260
.773/.814
286/222
77.6%
76.6/107
227/317
.715/.745
321/238
74.1%
86/115
255/340
.642/.639
340/250
73.5%
91.1/121
270/357
.567/.559
342/260
76%
91.6/125
271/371
.489/.498
---280/210
74.9%
1.39/2.60
.441/.329
Edelbrock 61199 Alum266/1002.18/1.6256571/54
76.1%
151/108
71.5%
226/182
80.5%
60.5/87.8
179/260
.753/.814
271/222
81.9%
72.6/107
215/317
.678/.745
323/238
73.7%
86.5/115
256/340
.646/.639
350/250
71.4%
93.8/121
278/357
.583/.559
355/260
73.2%
95.1/125
282/371
.507/.498
---279/210
75.2%
1.33/2.60
.441/.329
Edelbrock/ Chapman Victor 23 Deg 61209 Alum238/852.125/1.625
-
No Pipe
7168/54
79.4%
147/106
72.1%
221/181
81.9%
62.3/87.3
185/259
.756/.809
265/212
80%
74.7/102
221/303
.68/.711
293/228
77.8%
82.6/110
245/326
.601/.612
312/235
75.3%
88/113
261/336
.534/.525
317/240
75.7%
89.4/116
265/343
.465/.46
---259/200
77.3%
1.33/2.82
.430/.329
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Edelbrock/ Chapman Victor 23 Deg 61229 Alum243/852.125/1.625
-
No Pipe
7167/54
80.6%
147/106
72.1%
221/181
81.9%
62.3/87.3
185/259
.756/.809
269/212
78.8%
75.8/102
225/303
.69/.711
299/228
76.3%
84.3/110
250/326
.614/.612
310/235
75.8%
87.4/113
259/336
.53/.525
315/240
76.2%
88.8/116
263/343
.462/.46
---260/200
77%
1.30/2.82
.430/.329
Edelbrock/ Chapman Victor 23 Deg 61249 Alum247/852.125/1.625
-
No Pipe
7171/54
76.1%
146/106
72.6%
222/181
81.5%
62.6/87.3
185/259
.759/.809
268/212
79.1%
75.6/102
224/303
.687/.711
299/228
76.3%
84.3/110
250/326
.614/.612
314/235
74.8%
88.5/113
262/336
.537/.525
321/240
74.8%
90.5/116
268/343
.47/.46
---262/200
76.6%
1.30/2.82
.430/.329
Edelbrock/ Chapman Victor 23 Deg 61209 Revised Smithberg Racing AlumN/A2.135/1.60
4.155
No Pipe
N/A80/42
52.5%
166/98
59%
231/173
74.9%
64.5/86
191/255
.786/.786
281/209
74.4%
78.5/104
233/308
.717/.712
320/228
71.3%
89.4/113
265/336
.654/.621
338/241
71.3%
94.4/120
280/355
.575/.547
346/248
71.7%
96.6/123
286/365
.505/.483
351/257
73.2%
98/128
291/379
.448/.438
355/258
72.7%
99.2/128
294/380
.403/.391
360/258
71.7%
101/128
298/380
.368/.352
305/219
71.7%
-
.432/.324
Edelbrock Victor Jr. 23 Deg. 77569, 77579, 77589, 77599, 77619, 77629, 77639, 77649 SF1020 Alum215/852.08/1.6064/7067/64
95.5%
119/112
94.1%
177/153
86.4%
52.1/76.1
154/225
.618/.695
226/188
83.2%
66.5/93.5
197/277
.592/.64
265/207
78.1%
78/103
231/305
.556/.564
281/217
77.2%
82.7/108
245/320
.491/.493
285/220
77.2%
83.9/109
249/324
.427/.428
---226/183
81.1%
1.33/2.59
.421/.324
Edelbrock Victor Jr. 23 Deg. 7761 Alum CHPN/A2.08/1.60N/A69/57
82.6%
123/111
90.2%
173/145
83.8%
50.9/72.1
151/214
.604/.659
219/180
82.2%
64.5/89.5
191/265
.574/.613
255/198
77.6%
75/98.5
222/292
.535/.54
275/206
74.9%
80.9/102
240/304
.48/.468
284/206
72.5%
83.6/102
248/304
.425/.401
---222/174
78.7%
-
.421/.324
Edelbrock Victor Jr. 23 Deg. Ported Bullet Cylinder Heads Alum225/902.08/1.606872/55
76.4%
144/107
74.3%
201/156
77.6%
59.2/77.6
175/230
.702/.709
255/185
72.5%
75/92
222/273
.668/.63
287/208
72.5%
84.5/103
250/307
.602/.567
297/221
74.4%
87.4/110
259/326
.519/.502
305/226
74.1%
89.8/112
266/333
.457/.44
---248/184
74.1%
1.36/2.51
.421/.324
Edelbrock 23 Deg. 77559 Ported Jones Engineering 40/60 I-45 E-45 Alum237/-2.125/1.6071-151/118
78.1%
223/161
72.2%
62.9/80.1
186/237
.763/.731
273/200
73.3%
77/99.5
228/295
.70/.681
304/218
71.7%
85.7/108
254/321
.624/.594
324/230
71%
91.4/114
271/339
.554/.522
332/237
71.4%
93.6/118
277/349
.487/.461
---268/194
72.4%
1.40
.430/.324
EngineQuest 167 23 Deg Out of Box Weingartner Racing Iron167/-2.02/1.60
4.125
No Pipe
6770/64
91.4%
124/109
87.9%
173/158
91.3%
54/78.6
160/233
.622/.718
207/164
79.2%
64.6/81.6
191/242
.559/.559
230/167
72.6%
71.8/83.1
213/246
.496/.455
238/166
69.7%
74.3/82.6
220/245
.428/.377
241/166
68.9%
75.2/82.6
223/245
.372/.323
---202/155
76.7%
1.44
.409/.324
EngineQuest CC180BA 23 Deg Iron180/-2.02/1.60
-
No Pipe
6465/55
84.6%
130/107
82.3%
178/133
74.7%
55.5/66.1
165/196
.64/.604
213/157
73.7%
66.5/78.1
197/231
.575/.535
235/174
74%
73.3/86.5
217/256
.507/.474
242/183
75.6%
75.5/91
224/270
.435/.416
244/188
77%
76.1/93.5
226/277
.376/.366
---207/157
75.8%
1.36
.409/.324
EngineQuest CC200BA 23 Deg Iron200/-2.02/1.60
-
No Pipe
6475/65
86.7%
137/113
82.5%
186/147
79%
58/73.1
172/217
.669/.668
225/170
75.6%
70.2/84.6
208/251
.607/.579
252/182
72.2%
78.6/90.5
233/268
.544/.496
265/188
70.9%
82.7/93.5
245/277
.477/.427
272/189
69.5%
84.9/94
251/279
.419/.368
---223/165
74%
1.36
.409/.324
EngineQuest AC200BS 23 Deg Out of Box Shaver Alum197/-2.02/1.606559/51
86.4%
122/101
82.8%
176/139
79%
54.9/69.1
163/205
.633/.631
217/167
77%
67.7/83.1
201/246
.586/.569
231/180
77.9%
72.1/89.5
214/265
.499/.491
225/185
82.2%
70.2/92
208/273
.405/.42
228/187
82%
71.1/93
211/276
.352/.364
---200/160
80%
1.17
.409/.324
EngineQuest 200 Weingartner Racing Back Cut AlumN/a2.02/1.60
4.155
No Pipe
N/A64/48
75%
131/99
75.6%
186/132
71%
58/65.7
172/195
.669/.60
231/157
68%
72.1/78.1
214/231
.623/.535
252/176
69.8%
78.6/87.5
233/259
.544/.48
259/186
71.8%
80.8/92.5
239/274
.466/.422
259/191
73.7%
80.8/95
239/281
.399/.372
259/194
74.9%
80.8/96.5
239/286
.349/.33
--225/162
72%
-
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
EngineQuest CC220BA 23 Deg Iron220/-2.02/1.60
-
No Pipe
6471/64
90.1%
141/115
81.6%
196/145
74%
61.2/72.1
181/214
.705/.659
238/170
71.4%
74.3/84.6
220/251
.642/.579
265/189
71.3%
82.7/94
245/279
.572/.515
280/202
72.1%
87.4/100
259/298
.504/.459
284/208
73.2%
88.6/103
263/307
.438/.405
---234/172
73.3%
1.29
.409/.324
EngineQuest 220 23 Deg Out of Box Weingartner Racing Iron220/-2.02/1.60
4.125
No Pipe
6475/49
65.3%
145/103
71%
204/136
66.7%
63.7/67.6
189/200
.734/.618
252/155
61.5%
78.6/77.1
233/228
.68/.528
278/171
61.5%
86.7/85
257/252
.60/.466
292/183
62.7%
91.1/91
270/270
.525/.416
296/191
64.5%
92.4/95
274/281
.456/.372
---245/157
64%
1.35
.409/.324
EngineQuest 220 23 Deg Ported Dr Js Performance Out of Box Trmnatr IronN/A2.08/1.60
-
1 3/4" Pipe
N/A71/63
88.7%
139/125
89.9%
200/159
79.5%
58.9/79.1
174/234
.699/.722
242/190
78.5%
71.2/94.5
211/280
.634/.647
277/214
77.3%
81.5/106
242/315
.581/.583
297/230
77.4%
87.4/114
259/339
.519/.522
307/241
78.5%
90.3/120
268/355
.46/.469
---244/193
79.3%
-
.421/.324
EngineQuest CC235BA 23 Deg Iron235/-2.08/1.60
-
No Pipe
6472/56
77.8%
141/107
75.9%
198/138
69.7%
58.3/68.6
173/203
.692/.627
247/168
68%
72.7/83.6
215/248
.647/.572
279/187
67%
82.1/93
243/276
.585/.51
296/195
65.9%
87.1/97
258/287
.517/.443
304/200
65.8%
89.5/99.5
265/295
.455/.389
---244/166
67.9%
1.29
.421/.324
EngineQuest 235 23 Deg Out of Box Weingartner Racing Iron235/-2.08/1.60
4.125
No Pipe
7270/55
78.6%
139/115
82.7%
199/171
85.9%
58.6/85
174/252
.695/.777
246/190
77.2%
72.4/94.5
215/280
.645/.647
282/199
70.6%
83/99
246/293
.591/.542
308/202
65.6%
90.6/100
269/298
.538/.459
313/204
65.2%
92.1/101
273/301
.469/.397
---248/180
72.7%
1.33
.421/.324
EngineQuest 235 23 Deg Out of Box Weingartner Racing Brez I-30 E-30 back Cut Iron235/-2.08/1.60
4.155
No Pipe
6474/64
86.5%
146/116
79.5%
245/150
61.2%
72.1/74.6
214/221
.856/.681
276/173
62.7%
81.2/86
241/255
.723/.589
295/190
64.4%
86.8/94.5
257/280
.618/.518
305/198
64.9%
89.8/98.5
266/292
.533/.45
310/204
65.8%
91.2/101
270/301
.464/.397
---263/172
65.4%
1.32
.421/.324
EngineQuest 23 Deg Dr Js Performance Iron232/-2.08/1.60
N/A71/63
88.7%
139/125
89.9%
200/158
79%
58.9/78.6
174/233
.699/.718
242/190
78.5%
71.2/94.5
211/280
.634/.647
277/214
77.3%
81.5/106
242/315
.581/.583
297/230
77.4%
87.4/114
259/339
.519/.522
307/241
78.5%
90.3/120
268/355
.46/.469
---244/193
79.2%
1.32
.421/.324
EngineQuest 215 CNC Air Wolf Dr Js Performance Iron215/-2.08/1.60
4.06
5074/-143/-203/-
59.7
177
.709
252/-
74.2
220
.66
291/-
85.6
254
.61
312/-
91.8
272
.545
322/-
94.8
281
.482
328/-
96.5
286
.43
331/-
97.4
289
.385
335/-
98.6
292
.351
280
-
1.56
.421/.324
EngineQuest CH350A Vortec Iron176/-1.84/1.50
-
No Pipe
58-----------
-
-
.373/.304
EngineQuest CH350C Vortec Iron170/-2.02/1.60
-
No Pipe
6454/49
90.7%
104/88
84.6%
194/119
61.3%
60.5/59.2
179/175
.698/.541
224/140
62.5%
69.9/69.6
207/206
.604/.477
224/148
66.1%
69.9/73.6
207/218
.484/.403
226/152
67.3%
70.5/75.6
209/224
.407/.345
228/152
66.7%
71.1/75.6
211/224
.352/.296
---200/133
66.6%
1.34
.409/.324
EngineQuest CH350C Vortec Blended VJ Keith Morganstein IronN/A2.02/1.60N/A79/56
70.9%
153/94
61.4%
200/149
74.5%
62.4/74.1
185/220
.72/.677
238/177
74.4%
74.3/88
220/261
.642/.603
255/186
72.9%
79.6/92.5
236/274
.55/.507
266/193
72.6%
83/96
246/284
.478/.438
----222/160
71.9%
-
.409/.324
EngineQuest CH350I IMCA Iron167/-1.94/1.50N/A-----------
-
-
.393/.304
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
HRD Ported All Pro 23 Deg AlumN/A2.125/1.61N/A-148/120
81.1%
221/165
74.7%
62.3/81
185/240
.756/.745
275/235
85.5%
77.5/115
230/342
.705/.796
312/257
82.4%
88/126
261/374
.64/.696
329/266
80.9%
92.8/131
275/387
.563/.60
344/270
78.5%
97/133
287/393
.504/.522
---272/219
80.6%
-
.430/.326
HRD Ported All Pro 227 AlumN/A2.15/1.625N/A-148/115
77.7%
217/191
88%
59.8/92.1
177/273
.733/.854
272/242
89%
74.9/117
222/346
.69/.812
317/260
82%
87.3/125
259/371
.643/.698
342/269
78.7%
94.2/130
279/384
.578/.602
352/273
77.6%
97/132
287/390
.51/.523
358/277
77.4%
98.6/134
292/396
.454/.465
--287/232
81.1%
-
.435/.329
HRD Ported AFR 215245/-2.125/1.61N/A-142/111
78.2%
215/162
75.3%
60.6/79.6
180/236
.735/.731
271/222
81.9%
76.4/109
226/323
.695/.752
310/244
78.7%
87.4/120
259/355
.636/.661
328/251
76.5%
92.5/123
274/365
.561/.566
340/254
74.7%
95.9/125
284/370
.498/.491
---268/207
77.5%
1.39
.430/.326
HRD Ported Brodix Track I AlumN/A2.08/1.60N/A-138/111
80.4%
198/160
80.8%
58.3/79.6
173/236
.692/.727
254/209
82.3%
74.8/104
221/308
.666/.712
297/218
73.4%
87.4/108
259/321
.623/.594
312/225
72.1%
91.8/112
272/332
.545/.511
320/220
68.8%
94.2/109
279/324
.479/.428
---253/191
75.2%
-
.421/.324
HRD Ported GM 580/855 18 Deg255/-2.15/1.625N/A-154/111
72.1%
221/159
71.9%
60.9/76.7
180/227
.747/.711
276/235
85.1%
76/113
225/336
.70/.788
321/251
78.2%
88.4/121
262/359
.651/.674
355/262
73.8%
97.8/126
290/374
.60/.586
364/270
74.2%
100/130
297/386
.527/.517
---282/215
76.2%
1.43
.435/.329
HRD Ported GM 855 18 DegN/A2.18/1.60N/A-149/114
76.5%
225/178
79.1%
60.3/88.5
179/262
.75/.808
277/231
83.4%
74.2/115
220/340
.693/.787
318/260
81.8%
85.2/129
252/383
.636/.709
355/267
75.2%
95.1/133
282/393
.592/.606
365/270
74%
97.8/134
290/398
.521/.526
371/-
99.4
295
.464
--294/220
-
-
.441/.324
HRD Ported GM 12480011 SB2.2N/A-N/A-157/111
70.7%
240/160
66.7%
-
297/227
76.4%
-
339/254
74.9%
-
364/264
72.5%
-
374/272
72.7%
-
380/276
72.6%
-
--307/223
72.7%
HRD Ported GM 12480011 SB2.2290/-2.17/1.61N/A-140/114
81.4%
249/162
65.1%
67.3/79.6
199/236
.834/.731
314/221
70.4%
84.9/109
252/322
.789/.748
355/249
70.1%
96/122
284/362
.713/.674
383/262
68.4%
104/129
307/381
.641/.591
393/270
68.7%
106/133
315/393
.564/.522
406/288
70.9%
110/141
325/419
.51/.487
--320/224
69.9%
1.40
.439/.326
HRD Ported GM SB2.2 Hi/Lo270/-2.17/1.6138-142/114
80.3%
227/165
72.7%
61.4/81
182/240
.76/.745
298/217
72.8%
80.6/107
239/316
.749/.735
350/248
70.9%
94.6/122
280/361
.703/.672
379/267
70.4%
102/131
304/389
.635/.603
392/278
70.9%
106/137
314/405
.563/.538
398/281
70.6%
108/138
319/409
.50/.476
--312/224
71.8%
1.47
.439/.326
HRD Ported GM 517 Splayed ValN/A2.20/1.625N/A-142/114
80.3%
225/178
79.1%
59.2/85.8
175/254
.743/.796
294/226
76.9%
77.3/109
229/323
.728/.758
375/257
68.5%
98.6/124
292/367
.743/.69
375/273
72.8%
98.6/132
292/390
.619/.61
395/283
71.6%
104/136
308/404
.559/.542
406/287
70.7%
107/138
316/410
.503/.481
411/290
70.6%
108/140
320/414
.453/.432
-328/239
72.7%
-
.446/.329
HRD Ported GM 517 Splayed ValN/A2.225/1.625N/A-135/111
82.2%
220/146
66.4%
56.6/70.4
168/209
.719/.653
294/192
65.3%
75.6/92.6
224/274
.72/.644
353/235
66.6%
90.8/113
269/336
.692/.631
391/265
67.8%
101/128
298/379
.639/.593
409/281
68.7%
105/135
312/401
.573/.539
420/288
68.6%
108/139
320/411
.514/.483
433/292
67.4%
111/141
330/417
.471/.435
-332/226
68.2%
-
.451/.329
HRD Ported GM 615x 15 Deg268/-2.18/1.61N/A-151/114
75.5%
218/168
77.1%
58.4/82.5
173/245
.727/.758
270/232
85.9%
72.3/114
214/338
.675/.785
317/257
81.1%
84.9/126
252/374
.634/.696
352/271
77%
94.3/133
279/394
.587/.612
389/280
72%
104/138
309/408
.556/.542
401/283
70.6%
107/139
318/412
.501/.479
410/285
69.5%
110/140
325/415
.456/.429
-314/236
75.4%
1.53
.441/.326
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
HRD Ported GM 615x 15 Deg285/-2.20/1.61N/A-134/121
90.3%
211/178
84.4%
55.5/87.4
164/259
.697/.803
265/229
86.4%
69.7/112
207/333
.657/.775
317/259
81.7%
83.4/127
247/377
.628/.701
357/272
76.2%
93.9/134
278/396
.59/.614
390/278
71.3%
103/137
304/405
.552/.538
410/282
68.8%
108/139
320/410
.508/.477
422/288
68.2%
111/141
329/419
.465/.433
-313/238
76.1%
1.48
.446/.326
HRD Ported GM 615x 15 Deg Rolled to 13 Deg260/-2.17/1.6026-125/109
87.2%
199/175
87.9%
53.8/87
159/258
.666/.795
257/228
88.7%
69.5/113
206/336
.646/.777
312/262
84%
84.4/130
250/386
.627/.714
355/275
77.5%
96/137
284/405
.594/.625
384/284
74%
104/141
308/419
.551/.553
408/290
71.1%
110/144
327/427
.512/.494
419/296
70.6%
113/147
336/436
.468/.448
-307/240
78%
1.61
.439/.324
Holley 300-570 Alum172/-2.02/1.60
-
Pipe
6972/53
73.6%
134/102
76.1%
188/143
76.1%
58.7/71.1
174/211
.676/.65
223/170
76.2%
69.6/84.6
206/251
.602/.579
232/177
76.3%
72.4/88
214/261
.501/.482
236/180
76.3%
73.6/89.5
218/265
.425/.409
----203/154
76.2%
1.37
.409/.324
Holley SysteMax Alum186/-2.02/1.60
-
Pipe
6866/53
80.3%
130/92
70.8%
184/122
66.3%
57.4/60.7
170/180
.662/.554
222/148
66.7%
69.3/73.6
205/218
.599/.504
242/172
71.1%
75.5/85.5
224/253
.522/.469
252/187
74.2%
78.6/93
233/276
.453/.425
----206/144
70%
1.35
.409/.324
Holley Avenger Alum184/682.02/1.6068----223/173
77.6%
69.6/86
206/255
.481/.471
------
-
1.21/2.54
.409/.324
Patriot 23 Deg 185 Out of Box CHW SF600 Alum185/-2.02/1.60
4.00
No Pipe
N/A56/53
94.6%
101/83
82.2%
147/114
77.6%
45.9/56.7
136/168
.529/.518
190/137
72.1%
59.3/68.1
176/202
.513/.467
227/155
68.3%
70.8/77.1
210/228
.49/.422
245/171
69.8%
76.4/85
227/252
.441/.388
248/177
71.4%
77.4/88
229/261
.382/.345
---193/140
72.3%
1.34
.409/.324
Patriot 23 Deg 190 CNC Alum190/622.02/1.606464/50
78.1%
130/96
73.8%
181/136
75.1%
56.5/67.6
167/200
.651/.618
219/165
75.3%
68.3/82.1
202/243
.591/.562
248/181
73%
77.4/90
229/267
.535/.493
260/190
73.1%
81.1/94.5
240/280
.468/.431
----208/154
74%
1.37/3.06
.409/.324
Patriot 23 Deg 195 CNC Alum195/-2.02/1.606470/68
97.1%
140/106
75.7%
193/144
74.6%
60.2/71.6
178/212
.694/.654
230/178
77.4%
71.8/88.5
213/262
.621/.606
259/190
73.4%
80.8/94.5
239/280
.559/.518
270/201
74.4%
84.3/100
250/296
.486/.456
273/211
77.3%
85.2/105
252/311
.421/.411
---228/172
75.5%
1.40
.409/.324
Patriot 23 Deg 195 Dr Js Performance Alum195/-2.05/1.60
-
Pipe
N/A70/52
74.3%
132/94
71.2%
180/127
70.6%
54.5/63.2
162/187
.638/.577
220/162
73.6%
66.7/80.6
197/239
.585/.552
244/178
73%
73.9/88.5
219/262
.519/.485
260/188
72.3%
78.8/93.5
233/277
.461/.427
260/192
73.8%
78.8/95.5
233/283
.395/.374
---216/157
72.6%
1.33
.415/.324
Patriot 23 Deg 215 CNC Alum215/-2.02/1.606471/68
95.8%
141/106
75.2%
196/144
73.5%
61.2/71.6
181/212
.705/.654
234/178
76.1%
73/88.5
216/262
.631/.606
260/190
73.1%
81.1/94.5
240/280
.561/.518
278/201
72.3%
86.7/100
257/296
.50/.456
282/211
74.8%
88/105
261/311
.435/.411
---232/172
74%
1.31
.409/.324
Patriot 23 Deg 215 CNC Alum215/-2.08/1.606472/68
94.4%
138/106
76.8%
191/144
75.4%
56.2/71.6
167/212
.667/.654
230/178
77.4%
67.7/88.5
201/262
.603/.606
261/190
72.8%
76.8/94.5
228/280
.547/.518
283/201
71%
83.3/100
247/296
.494/.456
290/211
72.8%
85.3/105
253/311
.434/.411
---232/172
73.9%
1.35
.421/.324
Patriot 23 Deg 225 Out of Box CHW SF600 Alum225/-2.08/1.60
4.00
No Pipe
N/A64/48
75%
127/93
73.2%
181/135
74.6%
53.3/67.1
158/199
.632/.613
229/156
68.1%
67.4/77.6
200/230
.60/.531
266/167
62.8%
78.3/83.1
232/246
.558/.455
278/170
61.2%
81.8/84.6
242/251
.486/.386
283/174
61.5%
83.3/86.5
247/256
.424/.339
---227/149
65.6%
1.26
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Patriot Freedom 190 CNC HPS Alum190/622.02/1.606468/50
73.5%
132/97
73.5%
187/137
73.3%
58.4/68.1
173/202
.673/.622
225/165
73.3%
70.2/82.1
208/243
.607/.562
250/181
72.4%
78/90
231/267
.54/.493
259/190
73.4%
80.8/94.5
239/280
.466/.431
----211/154
73.1%
1.36/3.06
.409/.324
Patriot Freedom 225 Alum225/702.08/1.606482/70
85.4%
158/119
75.3%
222/164
73.9%
65.3/81.6
194/242
.776/.745
259/194
74.9%
76.2/96.5
226/286
.679/.661
287/215
74.9%
84.5/107
250/317
.602/.586
295/222
75.3%
86.8/110
257/327
.515/.504
301/224
74.4%
88.6/111
262/330
.451/.436
---254/190
74.8%
1.34/3.20
.421/.324
Patriot Freedom Meaux Racing Out of Box SF600 Alum225/-2.08/1.60
4.03
No Pipe
N/A-127/102
80.3%
187/149
79.7%
55/74.1
163/220
.653/.677
234/174
74.4%
68.9/86.5
204/256
.613/.593
262/179
68.3%
77.1/89
228/264
.549/.488
275/181
65.8%
80.9/90
240/267
.48/.411
277/182
65.7%
81.5/90.5
242/268
.415/.354
276/181
65.6%
81.2/90
241/267
.362/.308
--234/164
70.1%
1.23
.421/.324
PBM 217 CNC Iron217/-2.05/1.6062-146/114
78.1%
206/161
78.2%
62.4/80.1
185/237
.73/.731
255/191
74.9%
77.3/95
229/281
.678/.651
288/209
72.6%
87.3/104
259/308
.613/.57
304/216
71.1%
92.1/107
273/318
.539/.491
309/220
71.2%
93.6/109
277/324
.469/.428
---251/185
73.7%
1.42
.415/.324
PBM 228 CNC Iron228/-2.08/1.6062-143/111
77.6%
209/160
76.6%
61.5/79.6
182/236
.73/.727
258/192
74.4%
75.9/95.5
225/283
.676/.654
294/212
72.1%
86.5/105
256/312
.616/.578
314/220
70.1%
92.4/109
274/324
.549/.50
321/225
70.1%
94.5/112
280/332
.481/.438
---257/187
72.8%
1.41
.421/.324
PBM 232 CNC Iron232/-2.10/1.6062-151/114
75.5%
211/164
77.7%
60.9/81.6
181/242
.73/.745
261/196
75.1%
75.4/97.5
223/289
.677/.668
298/216
72.5%
86/107
255/318
.619/.589
316/230
72.8%
91.2/114
270/339
.547/.522
325/237
72.9%
93.8/118
278/349
.482/.461
---260/193
74.1%
1.40
.425/.324
PBM 15 Deg CNC AlumN/A2.18/1.62545-153/110
71.9%
228/184
80.7%
61.1/88.7
181/263
.76/.823
300/229
76.3%
80.4/110
238/327
.75/.768
340/258
75.9%
91.1/124
270/369
.68/.692
371/268
72.2%
99.4/129
295/383
.618/.599
382/274
71.7%
102/132
303/391
.546/.525
---296/221
74.6%
-
.441/.329
Pro Comp 23 Deg AlumN/A2.02/1.606471/57
80.3%
146/101
69.2%
204/157
77%
63.7/78.1
189/231
.734/.713
250/177
70.8%
78/88
231/261
.675/.603
261/186
71.3%
81.4/92.5
241/274
.563/.507
267/190
71.2%
83.3/94.5
247/280
.48/.431
276/195
70.7%
86.1/97
255/287
.426/.38
---234/168
71.7%
-
.409/.324
Pro Comp 190 OLD Out of BoxWeingartner Racing Alum190/-2.02/1.60
4.125
No Pipe
N/A71/55
77.5%
130/110
84.6%
174/143
82.2%
54.3/71.1
161/211
.626/.65
217/157
72.4%
67.7/78.1
201/231
.586/.535
247/159
64.4%
77.1/79.1
228/234
.533/.433
250/157
62.8%
78/78.1
231/231
.45/.357
250/156
62.4%
78/77.6
231/230
.385/.304
---211/147
69.6%
1.32
.409/.324
Pro Comp 190 Out of Box Weingartner Racing Alum190/-2.02/1.60
4.125
No Pipe
N/A71/55
77.5%
127/104
81.9%
178/132
74.2%
55.5/65.7
165/195
.64/.60
222/165
74.3%
69.3/82.1
205/243
.599/.562
253/180
71.1%
78.9/89.5
234/265
.546/.491
279/181
64.9%
87.1/90
258/267
.502/.411
287/182
63.4%
89.6/90.5
265/268
.443/.354
---224/157
70.1%
1.51
.409/.324
Pro Comp 190 23 Deg Dr Js Performance Alum190/-2.02/1.60N/A60/52
86.7%
107/81
75.7%
152/109
71.7%
47.4/54.2
141/161
.547/.495
200/136
68%
62.4/67.6
185/200
.54/.463
238/156
65.5%
74.3/77.6
220/230
.514/.425
257/174
67.7%
80.2/86.5
238/256
.462/.395
260/177
68.1%
81.1/88
240/261
.401/.345
---202/139
68.6%
1.37
.409/.324
Pro Comp 190 23 Deg CNC Dr Js Performance AlumN/A2.08/1.60
-
1 3/4" Pipe
N/A73/65
89%
139/115
82.7%
201/138
68.7%
59.2/68.6
175/203
.702/.627
245/167
68.2%
72.1/83.1
214/246
.642/.569
272/198
72.8%
80/98.5
237/292
.57/.54
289/217
75.1%
85.1/108
252/320
.505/.493
297/231
77.8%
87.4/115
259/340
.445/.45
---241/178
73.9%
-
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Pro Comp 220 23 Deg CNC Dr Js Performance Alum220/-2.08/1.606675/69
92%
144/110
76.4%
201/145
72.1%
59.2/72.1
175/214
.702/.659
244/175
71.7%
71.8/87
213/258
.639/.596
285/200
70.2%
83.9/99.5
249/295
.597/.545
308/215
69.8%
90.6/107
269/317
.538/.488
314/228
72.6%
92.4/113
274/336
.47/.444
318/237
74.5%
93.6/118
277/349
.417/.404
325/241
74.2%
95.6/120
283/355
.379/.365
-267/194
72.5%
1.48
.421/.324
Pro Comp 23 Deg 210 CNC Alum210/-2.02/1.60
4.125
N/A77/56
72.7%
157/112
71.3%
212/156
73.6%
66.2/77.6
196/230
.763/.709
240/183
76.3%
74.9/91
222/270
.648/.623
264/199
75.4%
82.4/99
244/293
.57/.542
278/208
74.8%
86.7/103
257/307
.50/.472
287/213
74.2%
89.6/106
265/314
.443/.415
---240/179
74.5%
1.37
.409/.324
Pro Comp 23 Deg 210 PC3003 SF600 Alum210/-2.02/1.60
-
Pipe
N/A63/52
82.5%
117/98
83.8%
163/132
81%
50.9/65.7
151/195
.586/.60
204/162
79.4%
63.7/80.6
189/239
.55/.552
230/180
78.3%
71.8/89.5
213/265
.496/.491
248/189
76.2%
77.4/94
229/279
.446/.429
252/192
76.2%
78.6/95.5
233/283
.389/.374
---202/159
78.5%
1.20
.409/.324
Pro Comp 210 CNC Out of Box Weingartner Racing Alum210/-2.02/1.60
4.125
No Pipe
N/A77/56
72.7%
157/112
71.3%
212/156
73.6%
66.2/77.6
196/230
.763/.709
240/183
76.3%
74.9/91
222/270
.648/.623
264/199
75.4%
82.4/99
244/293
.57/.542
278/208
74.8%
86.7/103
257/307
.50/.472
287/213
74.2%
89.6/106
265/314
.443/.415
290/216
74.5%
90.5/107
268/318
.391/.368
--247/184
74.5%
1.38
.409/.324
Pro Comp 210 CNC Out of Box Weingartner Racing Brez Alum210/-2.02/1.60
4.155
No Pipe
N/A62/49
79%
113/105
92.9%
160/136
85%
49.9/67.6
148/200
.576/.618
207/172
83.1%
64.6/85.5
191/253
.559/.586
250/187
74.8%
78/93
231/276
.54/.51
277/189
68.2%
86.4/94
256/279
.498/.429
284/189
66.5%
88.6/94
263/279
.438/.368
---215/163
75.8%
1.35
.409/.324
Pro Comp VortecN/A2.02/1.60N/A64/57
89.1%
114/101
88.6%
161/128
79.5%
50.2/63.7
149/189
.579/.581
201/152
75.6%
62.7/75.6
186/224
.542/.518
232/159
68.5%
72.4/79.1
214/234
.501/.433
251/169
67.3%
78.3/84.1
232/249
.452/.384
----192/142
73.9%
-
.409/.324
Pro Comp Ported Chad Speier v2.5 I-45 E-45 AlumN/A2.05/1.60
4.06
Pipe
N/A-149/107
71.8%
194/142
73.2%
58.8/70.6
174/209
.688/.645
245/175
71.4%
74.2/87
220/258
.651/.596
284/196
69%
86/97.5
255/289
.604/.534
300/209
69.7%
90.9/104
269/308
.532/.475
305/219
71.8%
92.4/109
274/323
.463/.426
308/225
73.1%
93.3/112
276/332
.409/.383
312/230
73.7%
94.5/114
280/339
.369/.348
313/233
74.4%
94.8/116
281/343
.333/.317
268/193
72%
-
.415/.324
Pro-Filer 195 Alum195/-2.02/1.60N/A-145/101
69.7%
205/144
70.2%
64/71.6
190/212
.738/.654
255/175
68.6%
79.6/87
236/258
.688/.596
278/194
69.8%
86.7/96.5
257/286
.60/.529
281/205
73%
87.7/102
260/302
.505/.466
282/213
75.5%
88/106
261/314
.435/.415
283/219
77.4%
88.3/109
262/323
.382/.373
--247/179
72.4%
1.45
.409/.324
Pro-Filer 195 Darin Morgan SF600 Alum195/-2.02/-N/A-147/-214/-
66.8
198
.77
259/-
80.8
239
.699
275/-
85.8
254
.594
276/-
86.1
255
.496
277/-
86.4
256
.427
277/-
86.4
256
.374
--246
-
1.42
.409
Pro-Filer 195 Out of Box Chad Speier Alum195/-2.02/-N/A-156/-217/-
67.7
201
.781
263/-
82.1
243
.71
277/-
86.4
256
.598
282/-
88
261
.507
285/-
88.9
263
.439
285/-
88.9
263
.385
--252
-
1.46
.409
Pro-Filer 195 Ported Chad Speier Alum204.5/-2.055/-N/A-164/-218/-
65.7
195
.771
272/-
82
243
.721
304/-
91.7
272
.645
305/-
92
272
.539
307/-
92.6
274
.465
308/-
92.9
275
.408
--268
-
-
.416
Pro-Filer 195 Ported Chad Speier I-45 E-45 Alum227/-2.10/1.60
4.155
72-145/-212/-
61.2
181
.734
268/-
77.4
229
.696
302/-
87.2
258
.627
322/-
93
275
.557
331/-
95.6
283
.491
333/-
96.1
285
.432
334/-
96.4
286
.385
336/-
97
287
.349
287
-
1.48
.425/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Pro-Filer 195 Ported Chad Speier I-45 E-45 Alum227/-2.10/1.60
4.155
1 7/8" Pipe
N/A-153/112
73.2%
222/154
69.4%
64.1/76.6
190/227
.768/.699
266/185
69.5%
76.8/92
228/273
.69/.63
299/207
69.2%
86.3/103
256/305
.621/.564
319/219
68.7%
92.1/109
273/323
.552/.497
329/227
69%
95/113
281/335
.488/.442
332/236
71.1%
95.9/117
284/348
.431/.402
334/239
71.6%
96.4/119
286/352
.385/.362
336/241
71.7%
97/120
287/355
.349/.328
288/202
70.3%
1.48
.425/.324
Pro-Filer 176-21 C 23 Deg Alum210/-2.055/1.6064-129/109
84.5%
186/145
78%
56.1/72.1
166/214
.658/.659
227/172
75.8%
68.4/85.5
203/253
.602/.586
271/187
69%
81.7/93
242/276
.575/.51
284/219
77.1%
85.6/109
254/323
.502/.497
294/232
78.9%
88.6/115
263/342
.446/.452
---232/177
76.5%
1.40
.416/.324
Pro-Filer 23 Deg Darin Morgan Ports Out of Box Int 30 deg Back cut 18 deg tulip exhaust w back cut SF600 Alum210/-2.055/1.60
-
No Pipe
62.15-62.2-143/96
67.1%
204/150
73.5%
61.5/74.6
182/221
.721/.681
250/178
71.2%
75.4/88.5
223/262
.663/.606
284/199
70.1%
85.6/99
254/293
.603/.542
300/211
70.3%
90.4/105
268/311
.53/.479
300/218
72.7%
90.4/108
268/321
.455/.424
302/221
73.2%
91.1/110
270/326
.40/.376
302/223
73.8%
91.1/111
270/329
.356/.338
300/223
74.3%
90.4/111
268/329
.318/.304
265/191
72.1%
1.44
.416/.324
Pro-Filer 23 Deg Gasket Matched Trmnatr AlumN/A2.055/1.60
4.07
N/A-143/96
67.1%
204/150
73.5%
61.5/74.6
182/221
.721/.681
250/178
71.2%
75.4/88.5
223/262
.663/.606
284/199
70.1%
85.6/99
254/293
.603/.542
300/211
70.3%
90.4/105
268/311
.53/.479
300/218
72.7%
90.4/108
268/321
.455/.424
302/221
73.2%
91.1/110
270/326
.40/.376
302/223
73.8%
91.1/111
270/329
.356/.338
300/223
74.3%
90.4/111
268/329
.318/.304
265/191
72.1%
-
.416/.324
Pro-Filer 23 Deg VJ Gasket Matched Ports Dr Js Perfomance Alum210/-2.08/1.60
4.155
1 3/4" Pipe
N/A74/59
79.7%
135/112
83%
197/162
82.2%
58/80.6
172/239
.688/.736
243/189
77.8%
71.5/94
212/279
.637/.644
282/205
72.7%
83/102
246/302
.591/.559
290/212
73.1%
85.3/105
253/312
.507/.481
295/221
74.9%
86.8/110
257/326
.442/.43
299/228
76.3%
88/113
261/336
.392/.388
--249/190
76.3%
1.42
.421/.324
Pro-Filer 210 Out of Box Daryl Alum210/-2.055/1.60N/A-127/102
80.3%
183/138
75.4%
55.2/68.6
163/203
.647/.627
232/158
68.1%
69.9/78.6
207/233
.615/.538
261/171
65.5%
78.7/85
233/252
.554/.466
277/177
63.9%
83.5/88
247/261
.49/.402
281/182
64.8%
84.7/90.5
251/268
.426/.354
295/-
88.9
264
.391
--237/155
-
1.40
.416/.324
Pro-Filer 210 Out of Box Back Cut Valve Chad Speier Alum210/-2.055/-
4.125
N/A-159/-211/-
63.6
188
.746
261/-
78.7
233
.692
285/-
85.9
255
.605
290/-
87.4
259
.513
295/-
88.9
264
.447
295/-
88.9
264
.391
--257
-
1.40
.416
Pro-Filer 210 Pushing the Throat Back Cut Valve Chad Speier Alum210/-2.055/-
4.125
N/A-155/-212/-
63.9
189
.75
260/-
78.4
232
.69
290/-
87.4
259
.615
291/-
87.7
260
.515
297/-
89.5
265
.45
300/-
90.4
268
.398
--258
-
1.43
.416
Pro-Filer 210 VJ Clean Up Chad Speier Alum210/-2.125/-N/A-148/-217/-
61.2
181
.742
261/-
73.6
218
.669
300/-
84.6
251
.616
302/-
85.2
252
.516
303/-
85.4
253
.444
300/-
84.6
251
.385
--262
-
1.44
.430
Pro-Filer Ported Chad Speier Alum218/-2.10/-N/A-153/-217/-
62.7
186
.751
266/-
76.8
228
.69
300/-
86.6
257
.623
311/-
89.8
266
.538
315/-
90.9
269
.467
319/-
92.1
273
.414
--269
-
1.46
.425
Pro-Filer Ported Chad Speier v2.72 AlumN/A2.10/1.60
4.155
No Pipe
N/A-139/100
71.9%
196/129
65.8%
56.6/64.2
168/190
.678/.586
243/161
66.3%
70.2/80.1
208/237
.631/.548
283/188
66.4%
81.7/93.5
242/277
.588/.512
317/206
65%
91.5/102
271/304
.549/.468
331/219
66.2%
95.6/109
283/323
.491/.426
337/228
67.7%
97.3/113
288/336
.437/.388
341/233
68.3%
98.5/116
292/343
.393/.353
344/239
69.5%
99.3/119
294/352
.357/.326
281/189
67.3%
-
.425/.324
Pro-Filer 220 CNC Air Wolf Alum220/-2.08/1.60
-
1 7/8" Pipe
6478/65
83.3%
155/116
74.8%
228/162
71.1%
67.1/80.6
199/239
.797/.736
276/196
71%
81.2/97.5
241/289
.723/.668
301/219
72.8%
88.6/109
262/323
.631/.597
315/233
74%
92.7/116
275/343
.55/.529
320/244
76.3%
94.2/121
279/360
.479/.475
322/252
78.3%
94.8/125
281/371
.422/.429
324/257
79.3%
95.4/128
283/379
.377/.389
-/260280/210
74.9%
1.47
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Pro-Filer Darin Morgan 220 CNC Air Wolf SF600 Alum220/-2.08/-N/A-155/-225/-
66.2
196
.786
272/-
80
237
.713
304/-
89.5
265
.637
317/-
93.3
276
.554
321/-
94.5
280
.481
326/-
95.9
284
.427
330/-
97.1
288
.384
331/-
97.4
289
.347
287
-
1.50
.421
Pro-Filer 235 CNC Air Wolf Alum235/-2.10/1.60
-
1 7/8" Pipe
N/A75/69
92%
147/110
74.8%
203/145
71.4%
58.6/72.1
174/214
.703/.659
249/180
72.3%
71.9/89.5
213/265
.646/.613
288/207
71.9%
83.2/103
246/305
.598/.564
310/220
71%
89.5/109
265/324
.536/.50
325/229
70.5%
93.8/114
278/337
.482/.446
335/238
71%
96.7/118
287/351
.435/.405
338/247
73.1%
97.6/123
289/364
.39/.374
339/250
73.7%
97.9/124
290/368
.352/.341
282/203
72.1%
1.44
.425/.324
Pro-Filer Darin Morgan 245 CNC Air Wolf SF600 Alum245/-2.125/-N/A-161/-231/-
65.1
193
.79
281/-
79.2
235
.721
311/-
87.7
260
.638
329/-
92.8
275
.563
339/-
95.6
283
.497
345/-
97.3
288
.442
349/-
98.4
292
.398
350/-
98.7
292
.359
300
-
1.43
.430
Pro-Filer Meaux Racing 220 CNC Air Wolf SF600 Alum220/-2.10/1.60
4.125
No Pipe
N/A-142/102
71.8%
209/146
69.9%
60.3/72.6
179/215
.723/.663
257/174
67.7%
74.2/86.5
220/256
.667/.593
290/196
67.6%
83.7/97.5
248/289
.602/.534
299/211
70.6%
86.3/105
256/311
.517/.479
303/220
72.6%
87.5/109
259/324
.449/.428
307/224
73%
88.6/111
263/330
.398/.382
309/227
73.5%
89.2/113
264/335
.356/.344
-265/188
70.9%
1.40
.425/.324
Pro-Filer 13 Clean up Chad Speier AlumN/A2.18/1.58N/A-148/115
77.7%
221/166
75.1%
59.2/84.7
175/251
.737/.764
279/202
72.4%
74.7/103
221/305
.698/.697
328/229
69.8%
87.9/117
260/346
.656/.632
351/244
69.5%
94/124
279/369
.585/.561
365/252
69%
97.8/129
290/381
.521/.497
370/257
69.5%
99.1/131
294/388
.463/.443
373/260
69.7%
99.9/133
296/393
.414/.399
375/262
69.9%
100/134
298/396
.375/.362
312/221
70.7%
-
.441/.320
Pro-Filer Ported Chad Speier AlumN/A2.20/-N/A-152/-229/-
60.2
178
.756
290/-
76.3
226
.718
335/-
88.1
261
.664
369/-
97.1
288
.609
388/-
102
302
.549
395/-
104
308
.489
397/-
104
309
.437
399/-
105
311
.395
328
-
-
.446
Pro 14 Deg as Cast235/-2.125/1.625N/A72/64
88.9%
147/105
71.4%
212/156
73.6%
59.8/75.2
177/223
.725/.698
269/200
74.3%
75.8/96.4
225/286
.69/.671
293/226
77.1%
82.6/109
245/323
.601/.606
312/238
76.3%
88/115
261/340
.534/.532
325/245
75.4%
91.6/118
272/350
.476/.47
---260/195
75.1%
1.38
.430/.329
Pro 14 Deg CNC Ported305/-2.25/1.625N/A77/67
87%
162/119
73.5%
234/189
80.8%
58.9/91.1
174/270
.756/.845
300/229
76.3%
75.5/110
224/327
.727/.768
353/252
71.4%
88.8/122
263/360
.684/.676
384/266
69.3%
96.6/128
286/380
.62/.595
401/274
68.3%
101/132
299/391
.555/.525
411/281
68.4%
103/135
306/401
.498/.471
--321/230
71.7%
1.35
.456/.329
Pro 23 Deg as Cast Alum235/-2.055/1.60
4.03
No Pipe
64/72-129/109
84.5%
186/145
78%
56.1/72.1
166/214
.658/.659
227/172
75.8%
68.4/85.5
203/253
.602/.586
271/187
69%
81.7/93
242/276
.575/.51
284/219
77.1%
85.6/109
254/323
.502/.497
295/232
78.6%
88.9/115
264/342
.447/.452
---232/177
76.4%
1.26
.416/.324
Pro 23 Deg as Cast AlumN/A2.055/1.60
4.03
No Pipe
64/7266/56
84.8%
134/110
82.1%
191/147
77%
57.6/73.1
171/217
.675/.668
232/175
75.4%
69.9/87
207/258
.615/.596
260/192
73.8%
78.4/95.5
232/283
.552/.523
278/201
72.3%
83.8/100
248/296
.492/.456
291/207
71.1%
87.7/103
260/305
.441/.403
296/210
70.9%
89.2/104
264/309
.393/.358
--240/177
73.8%
-
.416/.324
Pro 23 Deg as Cast Alum235/-2.08/1.60
4.03
No Pipe
64/7273/60
82.2%
138/114
82.6%
196/152
77.6%
57.7/75.6
171/224
.685/.69
243/178
73.3%
71.5/88.5
212/262
.637/.606
274/192
70.1%
80.6/95.5
239/283
.574/.523
292/194
66.4%
85.9/96.5
255/286
.51/.441
312/197
63.1%
91.8/98
272/290
.467/.383
---243/171
70.6%
1.33
.421/.324
Pro Topline 220 Out of Box220/-2.02/1.60
-
No Pipe
N/A-126/89
70.6%
184/123
66.8%
57.4/61.2
170/181
.662/.559
233/147
63.1%
72.7/73.1
215/217
.629/.501
265/162
61.1%
82.7/80.6
245/239
.572/.441
287/171
59.6%
89.6/85
265/252
.516/.388
----219/138
63.2%
1.30
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Pro Topline Iron254/-2.15/-N/A-154/117
76%
223/165
74%
61.4
182
.754
282/216
76.6%
77.7
230
.715
327/240
73.4%
90.1
267
.663
351/250
71.2%
96.7
286
.593
364/260
71.4%
100
297
.527
---284/208
73.4%
1.43
.435
Pro Topline Ported Rons AlumN/A2.10/1.60
4.125
N/A-131/115
87.8%
184/152
82.6%
53.1/75.6
157/224
.637/.69
229/180
78.6%
66.1/89.5
196/265
.594/.613
263/198
75.3%
75.9/98.5
225/292
.546/.54
291/209
71.8%
84/104
249/308
.504/.475
303/212
70%
87.5/105
259/312
.449/.413
305/214
70.2%
88.1/106
261/315
.396/.365
--244/183
75%
-
.425/.324
Pro Topline 14 Ported Weingartner Racing AlumN/A-
-
No Pipe
N/A76/51
67.1%
158/101
63.9%
229/140
61.1%
-
294/177
60.2%
-
383/211
55.1%
-
380/245
64.5%
-
395/258
65.3%
-
401/268
66.8%
-
407/272
66.8%
-
415/277
66.7%
-
340/217
63.7%
Racer Pro 23 Deg Ported Bullet Cylinder HeadsN/A2.08/1.606871/63
88.7%
140/109
77.9%
198/155
78.3%
58.3/77.1
173/228
.692/.704
248/187
75.4%
73/93
216/276
.65/.637
278/210
75.5%
81.8/104
242/309
.583/.572
293/221
75.4%
86.2/110
255/326
.512/.502
305/229
75.1%
89.8/114
266/337
.457/.446
---244/185
76%
-
.421/.324
Racer Pro 18 Deg Ported Bullet Cylinder Heads247/1002.15/1.606576/60
78.9%
158/112
70.9%
224/155
69.2%
61.7/77.1
183/228
.757/.704
273/194
71.1%
75.2/96.5
223/286
.692/.661
312/233
74.7%
85.9/116
255/343
.633/.635
331/241
72.8%
91.2/120
270/355
.559/.547
340/250
73.5%
93.7/124
277/368
.493/.487
344/257
74.7%
94.8/128
281/379
.436/.438
--283/206
72.8%
1.39/2.57
.435/.324
RDP-SBX Australian Pro Stock Darin Morgan SF600 AlumN/A2.27/1.60
-
No Pipe
N/A-146/92
63%
231/151
65.4%
57.1/75.1
169/223
.74/.686
314/188
59.9%
77.6/93.5
230/277
.754/.64
384/238
62%
94.9/118
281/351
.738/.649
426/271
63.6%
105/135
312/399
.682/.615
450/286
63.6%
111/142
329/421
.617/.557
465/296
63.7%
115/147
340/436
.558/.504
473/297
62.8%
117/148
346/438
.505/.45
482/299
62%
119/149
353/441
.463/.407
375/235
62.8%
-
.460/.324
RFD Monster 18 Deg AlumN/A2.18/1.625N/A--239/189
79.1%
64/91.1
190/270
.797/.845
304/233
76.6%
81.4/112
241/333
.76/.782
345/266
77.1%
92.4/128
274/380
.69/.714
380/266
70%
102/128
302/380
.633/.595
394/276
70.1%
106/133
313/394
.563/.529
395/281
71.1%
106/135
314/401
.494/.471
--343/252
73.5%
-
.441/.329
RHS RR 21 Deg Weingartner Racing Out of BoxN/A2.08/1.60
4.155
No Pipe
N/A67/55
82.1%
151/113
74.8%
212/154
72.6%
62.4/76.6
185/227
.741/.699
255/187
73.3%
75/93
222/276
.668/.637
271/202
74.5%
79.8/100
236/298
.568/.551
282/206
73%
83/102
246/304
.493/.468
287/210
73.2%
84.5/104
250/309
.43/.409
296/213
72%
87.1/106
258/314
.388/.363
--251/184
73.3%
-
.421/.324
RHS 21 Deg Ported Weingartner RacingN/A2.125/1.60
-
No Pipe
N/A70/55
78.6%
141/96
68.1%
208/133
63.9%
58.6/66.1
174/196
.711/.604
260/164
63.1%
73.3/81.6
217/242
.667/.559
298/192
64.4%
84/95.5
249/283
.611/.523
333/212
63.7%
93.9/105
278/312
.569/.481
343/224
65.3%
96.7/111
287/330
.503/.436
346/232
67.1%
97.6/115
289/342
.444/.395
350/236
67.4%
98.7/117
292/348
.399/.357
360/241
66.9%
102/120
301/355
.369/.328
293/192
65.6%
-
.430/.324
RHS 21 Deg Ported Rons Porting Service250/-2.15/1.6063-152/125
82.2%
220/170
77.3%
60.6/84.6
180/251
.744/.772
275/207
75.3%
75.7/103
224/305
.697/.705
318/220
69.2%
87.6/109
260/324
.645/.60
340/234
68.8%
93.7/116
277/345
.575/.531
346/242
69.9%
95.3/120
282/357
.501/.471
352/252
71.6%
97/125
287/371
.446/.429
--286/207
72.4%
1.41
.435/.324
RHS Lightning Iron CHP200/752.06/1.607265/45
69.2%
122/91
74.6%
170/128
75.3%
51/63.7
151/189
.60/.581
210/152
72.4%
63/75.6
187/224
.556/.518
233/167
71.7%
69.9/83.1
207/246
.493/.455
263/176
66.9%
78.9/87.5
234/259
.464/.40
----200/143
71.5%
1.32/2.35
.417/.324
RHS Lightning 23 Deg Ported Bullet Cylinder Heads Iron218/912.05/1.606872/57
79.2%
140/103
73.6%
183/144
78.7%
55.4/71.6
164/212
.649/.654
228/179
78.5%
69.1/89
205/264
.606/.61
265/202
76.2%
80.3/100
238/298
.564/.551
288/215
74.7%
87.3/107
259/317
.51/.488
294/220
74.8%
89.1/109
264/324
.447/.428
---233/177
76%
1.35/2.42
.415/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
RHS Pro Action 23 Deg 180 SF600180/-2.02/1.60
4.20
64/7274/58
78.4%
151/101
66.9%
207/157
75.8%
64.6/78.1
191/231
.745/.713
243/177
72.8%
75.8/88
225/261
.656/.603
258/186
72.1%
80.5/92.5
239/274
.557/.507
263/190
72.2%
82.1/94.5
243/280
.473/.431
270/195
72.2%
84.3/97
250/287
.416/.38
---232/168
72.3%
1.50
.409/.324
RHS Pro Action 23 Deg 200 SF600200/-2.02/1.60
4.20
50/64/7269/57
82.6%
134/101
75.4%
192/157
81.8%
59.9/78.1
178/231
.691/.713
236/177
75%
73.6/88
218/261
.637/.603
261/186
71.3%
81.4/92.5
241/274
.563/.507
268/190
70.9%
83.6/94.5
248/280
.482/.431
278/195
70.1%
86.7/97
257/287
.429/.38
---228/168
73.5%
1.39
.409/.324
RHS Pro Action 23 Deg 220 SF600220/-2.02/1.60
4.20
50/64/7271/57
80.3%
146/101
69.2%
205/157
76.6%
64/78.1
190/231
.738/.713
250/177
70.8%
78/88
231/261
.675/.603
265/186
70.2%
82.7/92.5
245/274
.572/.507
272/190
69.9%
84.9/94.5
251/280
.489/.431
282/195
69.1%
88/97
261/287
.435/.38
---237/168
70.8%
1.28
.409/.324
RHS Pro Action 23 Deg 220 Joe Sherman SF600 Iron220/-2.02/1.60N/A68/55
80.9%
128/99
77.3%
182/132
72.5%
56.8/65.7
168/195
.655/.60
233/160
68.7%
72.7/79.6
215/236
.629/.545
269/184
68.4%
83.9/91.5
249/271
.581/.501
290/192
66.2%
90.5/95.5
268/283
.522/.436
301/201
66.8%
93.9/100
278/296
.464/.391
---234/161
69%
1.37
.409/.324
RHS 220 Smithberger Racing IronN/A2.02/1.60
4.155
No Pipe
N/A73/53
72.6%
131/115
87.8%
190/147
77.4%
59.3/73.1
176/217
.684/.668
241/180
74.7%
75.2/89.5
223/265
.65/.613
279/196
70.3%
87.1/97.5
258/289
.602/.534
300/201
67%
93.6/100
277/296
.54/.456
303/206
68%
94.5/102
280/304
.467/.401
---241/174
72.4%
-
.409/.324
RHS 220 Ported Smithberger Racing Iron244/822.08/1.60
4.155
No Pipe
6674/48
64.9%
146/103
70.5%
202/140
69.3%
59.4/69.6
176/206
.706/.636
248/185
74.6%
73/92
216/273
.65/.63
283/206
72.8%
83.3/102
247/304
.593/.561
313/219
70%
92.1/109
273/323
.547/.497
328/226
68.9%
96.5/112
286/333
.491/.44
336/234
69.6%
98.9/116
293/345
.44/.399
343/238
69.4%
101/118
299/351
.399/.36
-275/194
70.5%
1.41/2.90
.421/.324
RHS 220 Weingartner Racing Back Cut AlumN/A2.02/1.60
4.155
No Pipe
N/A65/59
90.8%
126/99
78.6%
184/129
70.1%
57.4/64.2
170/190
.662/.586
230/155
67.4%
71.8/77.1
213/228
.621/.528
265/176
66.4%
82.7/87.5
245/259
.572/.48
285/187
65.6%
88.9/93
263/276
.513/.425
289/194
67.1%
90.2/96.5
267/286
.446/.378
282/196
69.5%
88/97.5
261/289
.38/.334
280/196
70%
87.4/97.5
259/289
.336/.297
-243/167
68.6%
-
.409/.324
RHS 220 Chad Speier AlumN/A2.02/-
4.155
N/A-133/-187/-
58.4
173
.673
233/-
72.7
215
.629
268/-
83.6
248
.579
281/-
87.7
260
.505
282/-
88
261
.435
281/-
87.7
260
.379
280/-
87.4
259
.336
-243
-
-
.409
RHS 220 Chad Speier AlumN/A2.02/-
4.155
N/A-135/-183/-
57.1
169
.658
232/-
72.4
214
.626
268/-
83.6
248
.579
291/-
90.8
269
.523
297/-
92.7
275
.458
303/-
94.5
280
.409
305/-
95.2
282
.366
307/-
95.8
284
.331
258
-
-
.409
RHS Pro Action 23 Deg 228 3V Performance CNC228/-2.05/1.60
4.03
No Pipe
N/A78/60
76.9%
144/104
72.2%
199/140
70.4%
60.3/69.6
179/206
.705/.636
249/165
66.3%
75.4/82.1
224/243
.662/.562
280/188
67.1%
84.8/93.5
251/277
.596/.512
302/211
69.9%
91.5/105
271/311
.535/.479
315/214
67.9%
95.4/106
283/315
.479/.417
---248/170
68.6%
1.38
.415/.324
RHS Pro Action 23 Deg 235 SF600235/-2.08/1.60
4.20
64/7273/60
82.2%
138/114
82.6%
196/152
77.6%
57.7/75.6
171/224
.685/.69
243/178
73.3%
71.5/88.5
212/262
.637/.606
274/183
66.8%
80.6/91
239/270
.574/.499
292/191
65.4%
85.9/95
255/281
.51/.434
312/195
62.5%
91.8/97
272/287
.467/.38
---243/169
69.6%
1.33
.421/.324
RHS Pro Action 23 Deg 235 Meaux Racing Out of Box SF600 Iron235/-2.08/1.60
4.00
No Pipe
N/A-102/85
83.3%
158/124
78.5%
46.5/61.7
138/183
.552/.563
199/149
74.9%
58.6/74.1
174/220
.521/.508
239/169
70.7%
70.3/84.1
208/249
.501/.461
275/179
65.1%
80.9/89
240/264
.48/.407
300/188
62.7%
88.3/93.5
262/277
.449/.366
309/191
61.8%
90.9/95
269/281
.405/.325
--226/155
68.6%
1.31
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
RHS Pro Action 23 Deg 235 Meaux Racing Out of Box SF600 Best out of 12 pairs Iron235/-2.08/1.60
4.125
No Pipe
N/A-110/85
77.3%
160/128
80%
47.1/63.7
140/189
.559/.581
211/154
73%
62.1/76.6
184/227
.553/.525
255/171
67.1%
75/85
222/252
.535/.466
291/181
62.2%
85.6/90
254/267
.508/.411
310/188
60.6%
91.2/93.5
270/277
.464/.366
311/190
61.1%
91.5/94.5
271/280
.407/.324
310/192
61.9%
91.2/95.5
270/283
.361/.291
-245/161
65.8%
1.32
.421/.324
RHS Pro Action 23 Deg 235 Competition Engines235/-2.08/1.60
4.03
N/A-113/91
80.5%
161/119
73.9%
47.4/59.2
140/175
.563/.541
209/141
67.5%
61.5/70.1
182/208
.548/.48
248/157
63.3%
73/78.1
216/231
.52/.428
281/166
59.1%
82.7/82.6
245/245
.491/.377
293/173
59%
86.2/86
255/255
.439/.337
---218/141
64.9%
1.25
.421/.324
RHS 235 Ported T-FlowN/A2.08/1.60
4.16
N/A-139/-191/158
82.7%
56.2/78.6
167/233
.667/.718
237/-
69.7
207
.621
280/190
67.9%
82.4/94.5
244/280
.587/.518
308/-
90.6
269
.538
316/206
65.2%
93/102
276/304
.473/.401
320/-
94.2
279
.419
321/-
94.5
280
.374
-264/185
-
-
.421/.324
RHS Pro Action 14 Deg as Cast235/-2.125/1.625N/A72/59
81.9%
142/109
76.8%
216/160
74.1%
60.9/77.1
180/229
.739/.716
279/205
73.5%
78.7/98.8
233/293
.716/.688
321/227
70.7%
90.5/109
268/324
.659/.609
345/236
68.4%
97.3/114
288/337
.59/.528
350/246
70.3%
98.7/119
292/351
.513/.471
---276/197
71.6%
1.49
.430/.329
RHS 12030 23 Deg Meaux Racing Out of Box SF600 Alum235/-2.08/1.60
4.125
No Pipe
N/A-118/98
83.1%
162/141
87%
47.7/70.1
141/208
.566/.64
209/171
81.8%
61.5/85
182/252
.548/.583
251/186
74.1%
73.9/92.5
219/274
.526/.507
277/192
69.3%
81.5/95.5
242/283
.484/.436
278/195
70.1%
81.8/97
242/287
.416/.38
277/196
70.8%
81.5/97.5
242/289
.363/.334
277/196
70.8%
81.5/97.5
242/289
.323/.297
-231/172
74.4%
1.18
.421/.324
RHS Pro Topline 235 CNC Out of Box Weingartner Racing235/-2.08/1.60
4.125
No Pipe
6477/59
76.6%
134/110
82.1%
187/142
75.9%
55/70.6
163/209
.653/.645
236/168
71.2%
69.5/83.6
206/248
.618/.572
274/191
69.7%
80.6/95
239/281
.574/.521
306/200
65.4%
90.1/99.5
267/295
.535/.454
318/204
64.2%
93.6/101
277/301
.476/.397
---243/169
69.8%
1.35
.421/.324
RHS 235cc GPA Jet Sprint Ported Kelford Cams IronN/A2.08/1.6064/7280/69
86.3%
147/129
87.8%
203/166
81.8%
59.7/82.6
177/245
.709/.754
249/193
77.5%
73.3/96
217/284
.652/.657
280/208
74.3%
82.4/103
244/307
.587/.567
299/213
71.2%
88/106
261/314
.522/.484
312/215
68.9%
91.8/107
272/317
.467/.419
---248/187
75.4%
-
.421/.324
RHS 235cc Out of Box Chad Speier SF600N/A2.08/-
4.155
N/A-121/-171/-
50.3
149
.597
213/-
62.7
186
.558
253/-
74.5
221
.53
280/-
82.4
244
.489
283/-
83.3
247
.424
283/-
83.3
247
.371
279/-
82.1
243
.325
-235
-
-
.421
RHS 235cc Econo Ported Chad SpeierN/A2.08/1.60N/A-141/119
84.4%
194/154
79.4%
57.1/76.6
169/227
.678/.699
247/176
71.3%
72.7/87.5
215/259
.647/.60
286/191
66.8%
84.2/95
249/281
.60/.521
314/199
63.4%
92.4/99
274/293
.549/.452
321/201
62.6%
94.5/100
280/296
.481/.391
324/211
65.1%
95.4/105
283/311
.425/.359
--261/179
68.5%
-
.421/.324
RHS 235cc Ported Chad SpeierN/A2.08/1.60
4.155
N/A-140/132
94.3%
200/160
80%
58.9/79.6
174/236
.699/.727
249/189
75.9%
73.3/94
217/279
.652/.644
289/212
73.4%
85.1/105
252/312
.606/.578
321/224
69.8%
94.5/111
280/330
.561/.509
336/232
69%
98.9/115
293/342
.503/.452
338/236
69.8%
99.5/117
295/348
.443/.402
339/-
99.8
296
.395
-277/198
-
-
.421/.324
RHS Ported Chad SpeierN/A2.10/1.60N/A-------340/-
98.2
291
.441
-348/-
100
298
.361
344
-
-
.425/.324
RHS Vortec 23 Deg Iron170/-1.94/1.50N/A----252/-
85.3
253
.566
------
-
1.48
.393/.304
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
RHS Pro Torker Vortec 23 Deg SF600 Iron170/-1.94/1.50
4.20
6471/59
83.1%
144/114
79.2%
209/146
69.9%
70.7/82.6
209/245
.783/.707
258/159
61.6%
87.3/90
259/267
.725/.578
268/165
61.6%
90.7/93.4
269/277
.602/.48
-----220/146
66.4%
1.58
.393/.304
RHS Pro Torker Vortec 23 Deg SF600 Iron170/-2.02/1.60
4.20
6477/74
96.1%
155/140
90.3%
220/168
76.4%
68.6/83.6
203/248
.791/.763
263/172
65.4%
82.1/85.5
243/253
.71/.586
270/174
64.4%
84.3/86.5
250/256
.583/.474
-----227/164
72%
1.59
.409/.324
RHS Pro Torker 23 Deg Out of Box Weingartner Racing Brez IronN/A2.02/1.60
4.155
No Pipe
N/A70/54
77.1%
126/106
84.1%
186/143
76.9%
58/71.1
172/211
.669/.65
222/151
68%
69.3/75.1
205/223
.599/.514
254/154
60.6%
79.3/76.6
235/227
.548/.42
235/155
66%
73.3/77.1
217/228
.423/.352
----205/142
69.3%
-
.409/.324
RHS 12407 Out of Box 30 BC Randy Iron170/-1.94/-
4.06
N/A-135/-188/-
63.6
188
.704
230/-
77.8
231
.646
241/-
81.5
242
.542
-----199
-
1.42
.393
RHS 12410 Out of Box 30 BC Randy Iron170/-2.02/-
4.06
N/A-143/-198/-
61.8
183
.712
233/-
72.7
215
.629
246/-
76.8
227
.531
-----205
-
1.45
.409
Trick Flow G1 SF600180/-2.02/1.60
4.03
1 3/4" Pipe
6466/52
78.8%
143/110
76.9%
187/148
79.1%
58.4/73.6
173/218
.673/.672
223/178
79.8%
69.6/88.5
206/262
.602/.606
232/194
83.6%
72.4/96.5
214/286
.501/.529
240/204
85%
74.9/101
222/301
.432/.463
----205/167
81.4%
1.33
.409/.324
Trick Flow G2 31500005 CARB SF600190/822.02/1.60
4.03
1 3/4" Pipe
6668/53
77.9%
144/106
73.6%
206/144
69.9%
64.3/71.6
190/212
.741/.654
242/173
71.5%
75.5/86
224/255
.653/.589
252/195
77.4%
78.6/97
233/287
.544/.531
257/205
79.8%
80.2/102
238/302
.462/.466
----220/165
74.8%
1.35/2.50
.409/.324
Trick Flow 18 Deg Ultra SF600230/-2.15/1.6070------334/256
76.6%
92/127
273/377
.484/.498
----
-
1.45
.435/.324
Trick Flow 18 Deg Ultra Race SF600250/1002.15/1.60
4.155
2" Pipe
5673/61
83.6%
144/113
78.5%
215/158
73.5%
59.2/78.6
175/233
.727/.718
274/200
73%
75.5/99.5
224/295
.695/.681
313/230
73.5%
86.2/114
255/339
.635/.627
334/248
74.3%
92/123
273/365
.564/.563
334/256
76.6%
92/127
273/377
.484/.498
---269/201
74.7%
1.34/2.56
.435/.324
Trick Flow 18 Deg SF600 Alum250/1002.15/1.62556-144/113
78.5%
217/152
70%
59.8/73.3
177/217
.733/.68
276/198
71.7%
76/95.5
225/283
.70/.664
316/219
69.3%
87/106
258/313
.641/.588
328/231
70.4%
90.3/111
268/330
.554/.517
328/237
72.3%
90.3/114
268/339
.475/.454
---268/192
71.5%
1.31/2.37
.435/.329
Trick Flow 18 Deg Cartridge Roll Clean-up SF600 Alum250/1002.15/1.60
4.155
2 pipe
5673/61
83.6%
144/113
78.5%
215/158
73.5%
59.2/78.6
175/233
.727/.718
274/197
71.9%
75.5/98
224/290
.695/.671
313/224
71.6%
86.2/111
255/330
.635/.61
334/237
71%
92/118
273/349
.564/.538
334/246
73.7%
92/122
273/363
.484/.479
---269/196
72.8%
1.34/2.46
.435/.324
Trick Flow 18 Deg CNC Chamber Intake Port Match SF600 Alum250/1002.15/1.60
4.155
N/A71/-149/-221/-
60.9
180
.747
277/-
76.3
226
.702
319/-
87.9
260
.647
351/-
96.7
286
.593
343/-
94.5
280
.497
---277
-
1.40
.435/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Trick Flow 18 Deg Ported TEA Alum265/902.15/1.60
4.155
2" Pipe
5669/55
79.7%
146/113
77.4%
225/169
75.1%
62/84.1
184/249
.761/.768
289/239
82.7%
79.6/119
236/352
.733/.814
332/275
82.8%
91.4/137
271/405
.673/.749
354/299
84.5%
97.5/149
289/441
.598/.679
357/312
87.4%
98.3/155
291/460
.517/.607
366/321
87.7%
101/160
299/473
.464/.547
--296/247
83.5%
1.38/3.57
.435/.324
Trick Flow 18 Deg Ported TEA Alum274/1092.18/1.60N/A60/52
86.7%
131/120
91.6%
209/175
83.7%
56/87
166/258
.697/.795
275/229
83.3%
73.7/114
218/337
.688/.78
333/273
82%
89.2/136
264/402
.666/.744
369/294
79.7%
98.9/146
293/433
.615/.668
381/308
80.8%
102/153
302/454
.544/.60
390/317
81.3%
104/158
310/467
.488/.54
396/324
81.8%
106/161
314/477
.44/.491
-311/255
82.1%
1.45/2.97
.441/.324
Trick Flow 18 Deg Ported TEA Alum275/952.18/1.60
4.185
2" Pipe
5664/55
85.9%
137/124
90.5%
220/190
86.4%
58.9/94.5
175/280
.733/.863
286/243
85%
76.6/121
227/358
.715/.828
340/285
83.8%
91.1/142
270/420
.68/.777
383/305
79.6%
103/152
304/449
.638/.693
402/313
77.9%
108/156
319/461
.574/.609
404/316
78.2%
108/157
321/466
.505/.538
405/320
79%
109/159
321/472
.45/.484
-322/262
81.3%
1.47/3.37
.441/.324
Trick Flow 18 Deg Ported TEA Alum295/1092.20/1.60N/A64/52
81.3%
133/120
90.2%
216/175
81%
56.8/87
168/258
.714/.795
282/229
81.2%
74.2/114
220/337
.699/.78
340/273
80.3%
89.4/136
265/402
.674/.744
385/294
76.4%
101/146
300/433
.636/.668
412/308
74.8%
108/153
321/454
.583/.60
420/317
75.5%
110/158
327/467
.52/.54
425/324
76.2%
112/161
331/477
.468/.491
-327/255
78.1%
1.44/2.97
.446/.324
Trick Flow 18 Deg Ported BES Alum258/-2.15/1.6056-129/108
83.7%
197/150
76.1%
54.3/74.6
161/221
.666/.681
258/182
70.5%
71.1/90.5
211/268
.654/.62
302/208
68.9%
83.2/103
246/307
.612/.567
336/224
66.7%
92.5/111
274/330
.568/.509
358/235
65.6%
98.6/117
292/346
.519/.457
364/240
65.9%
100/119
297/354
.461/.409
--278/192
69.3%
1.41
.435/.324
Trick Flow 30400001 Alum CHP195/732.02/1.606460/43
71.7%
125/86
68.8%
174/117
67.2%
54.3/58.2
161/172
.626/.531
215/144
67%
67.1/71.6
199/212
.58/.491
239/162
67.8%
74.6/80.6
221/239
.516/.441
243/175
72%
75.8/87
225/258
.437/.397
----199/137
68.7%
1.25/2.40
.409/.324
Trick Flow 23 Deg Super Street SF600 Alum175/671.94/1.50
4.03
1 3/4" Pipe
5662/57
91.9%
127/109
85.8%
180/142
78.9%
60.9/80.4
180/238
.674/.688
219/167
76.3%
74.1/94.5
220/280
.615/.607
242/181
74.8%
81.9/102
243/303
.544/.526
245/192
78.4%
82.9/109
246/322
.459/.465
----203/158
78.1%
1.40/2.87
.393/.304
Trick Flow 23 Deg Super Street Alum175/671.94/1.505661/53
86.9%
127/105
82.7%
180/142
78.9%
60.9/80.4
180/238
.674/.688
216/160
74.1%
73.1/90.5
217/268
.607/.581
242/172
71.1%
81.9/97.3
243/288
.544/.50
242/180
74.4%
81.9/102
243/302
.453/.436
----201/152
75.4%
1.38/2.69
.393/.304
Trick Flow 23 Deg Super Street/Strip SF600 Alum195/722.02/1.6062-----254/190
74.8%
79.3/94.5
235/280
.457/.431
-----
-
1.30/2.64
.409/.324
Trick Flow 23 Deg Super Street/Strip CNC Chamber SF600 Alum195/722.02/1.60
4.03
1 3/4" Pipe
7271/53
74.6%
142/99
69.7%
196/135
68.9%
61.2/67.1
181/199
.705/.613
234/167
71.4%
73/83.1
216/246
.631/.569
249/186
74.7%
77.7/92.5
230/274
.537/.507
249/199
79.9%
77.7/99
230/293
.448/.452
----214/157
73.5%
1.28/2.76
.409/.324
Trick Flow 23 Deg Super Race SF600 Alum215/782.08/1.60
4.155
1 7/8" Pipe
67/7266/57
86.4%
141/107
75.9%
199/145
72.9%
58.6/72.1
174/214
.695/.659
244/175
71.7%
71.8/87
213/258
.639/.596
273/190
69.6%
80.3/94.5
238/280
.572/.518
282/198
70.2%
83/98.5
246/292
.493/.45
287/203
70.7%
84.5/101
250/299
.43/.395
---238/170
71.4%
1.33/2.60
.421/.324
Trick Flow 23 Deg Super 215 3240 SF600 Alum215/782.08/1.60
4.155
1 7/8" Pipe
67/7266/58
87.9%
141/108
76.6%
199/147
73.9%
58.6/73.1
174/217
.695/.668
244/180
73.8%
71.8/89.5
213/265
.639/.613
273/202
74%
80.3/100
238/298
.572/.551
282/214
75.9%
83/106
246/315
.493/.486
287/223
77.7%
84.5/111
250/329
.43/.434
---238/179
75.3%
1.33/2.86
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Trick Flow 23 Deg Super Race CNC SF600 Alum230/782.08/1.60
4.155
1 7/8" Pipe
7069/55
79.7%
144/112
77.8%
213/158
74.2%
62.7/78.6
186/233
.744/.718
265/195
73.6%
78/97
231/287
.694/.664
296/220
74.3%
87.1/109
258/324
.621/.60
305/234
76.7%
89.8/116
266/345
.533/.531
310/240
77.4%
91.2/119
270/354
.464/.467
---256/193
75.6%
1.35/3.08
.421/.324
Trick Flow TFS 23 Deg CHPN/A2.02/1.60N/A65/70
107%
133/102
76.7%
188/140
74.5%
58.7/69.6
174/206
.676/.636
226/164
72.6%
70.5/81.6
209/242
.61/.559
250/183
73.2%
78/91
231/270
.54/.499
-----199/147
73.9%
-
.409/.324
Trick Flow R 23 Deg SF600 Alum215/782.08/1.60
-
Pipe
6766/57
86.4%
141/107
75.9%
199/145
72.9%
58.6/72.1
174/214
.695/.659
244/175
71.7%
71.8/87
213/258
.639/.596
273/190
69.6%
80.3/94.5
238/280
.572/.518
282/198
70.2%
83/98.5
246/292
.493/.45
287/203
70.7%
84.5/101
250/299
.43/.395
---238/170
71.4%
1.33/2.60
.421/.324
Trick Flow Duttweiler 23 Deg SF600 Alum195/722.02/1.606251/58
113%
136/98
72.1%
191/136
71.2%
59.6/67.6
177/200
.687/.618
230/163
70.9%
71.8/81.1
213/240
.621/.555
253/177
70%
78.9/88
234/261
.546/.482
254/190
74.8%
79.3/94.5
235/280
.457/.431
----213/153
71.8%
1.30/2.64
.409/.324
Trick Flow Duttweiler 23 Deg CNC Chamber SF600 Alum195/722.02/1.606464/56
87.5%
138/105
76.1%
198/146
73.7%
61.8/72.6
183/215
.712/.663
237/171
72.2%
74/85
219/252
.639/.583
257/186
72.4%
80.2/92.5
238/274
.555/.507
258/196
76%
80.5/97.5
239/289
.464/.445
----218/161
73.9%
1.32/2.72
.409/.324
Trick Flow 23 Deg Ported TEA Alum200/-2.02/1.60
4.03
Pipe 1 3/4
N/A68/54
79.4%
143/117
81.8%
217/177
81.6%
67.7/88
201/261
.781/.804
263/219
83.3%
82.1/109
243/323
.71/.746
290/243
83.8%
90.5/121
268/358
.626/.662
294/257
87.4%
91.7/128
272/379
.529/.584
----241/203
83.9%
1.47
.409/.324
Trick Flow 23 Deg Ported TEA AlumN/A2.08/1.60
4.125
Pipe 2"
N/A69/52
75.4%
144/119
82.6%
210/182
86.7%
61.8/90.5
183/268
.734/.827
260/224
86.2%
76.5/111
227/330
.681/.763
300/247
82.3%
88.3/123
262/364
.629/.673
314/257
81.8%
92.4/128
274/379
.549/.584
318/262
82.4%
93.6/130
277/386
.476/.51
---258/215
83.5%
-
.421/.324
World S/R Replacement SF600 Iron170/651.94/1.50
-
No Pipe
58/67/76----232/161
69.4%
78.5/91.1
233/270
.521/.468
------
-
1.36/2.48
.393/.304
World S/R Replacement SF1020 Iron170/651.94/1.50
-
No Pipe
58/67/76----220/151
68.6%
74.4/85.4
221/253
.494/.439
------
-
1.29/2.32
.393/.304
World S/R Torquer SF600 Iron170/652.02/1.60
-
No Pipe
67/7663/53
84.1%
129/102
79.1%
186/137
73.7%
58/68.1
172/202
.669/.622
217/146
67.3%
67.7/72.6
201/215
.586/.497
235/151
64.3%
73.3/75.1
217/223
.507/.412
222/153
68.9%
69.3/76.1
205/225
.399/.347
219/154
70.3%
68.3/76.6
202/227
.338/.30
217/154
71%
67.7/76.6
201/227
.293/.262
--204/142
70%
1.38/2.37
.409/.324
World S/R Torquer SF1020 Iron170/652.02/1.60
-
No Pipe
67/7660/50
83.3%
123/97
78.9%
177/130
73.4%
55.2/64.7
164/192
.637/.59
206/139
67.5%
64.3/69.1
190/205
.556/.474
223/143
64.1%
69.6/71.1
206/211
.481/.39
211/145
68.7%
65.8/72.1
195/214
.38/.329
208/146
70.2%
64.9/72.6
192/215
.321/.284
206/146
70.9%
64.3/72.6
190/215
.278/.249
--193/135
69.9%
1.31/2.25
.409/.324
World S/R Torque Iron CHP171/822.02/1.60
-
No Pipe
67/7668/55
80.9%
128/100
78.1%
179/133
74.3%
55.9/66.1
165/196
.644/.604
205/145
70.7%
64/72.1
190/214
.553/.494
221/153
69.2%
69/76.1
204/225
.477/.417
225/155
68.9%
70.2/77.1
208/228
.405/.352
----192/137
71.6%
1.32/1.89
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
World S/R Torque Iron CHP171/822.02/1.60
-
Pipe
67/7668/55
80.9%
128/104
81.3%
179/140
78.2%
55.9/69.6
165/206
.644/.636
205/156
76.1%
64/77.6
190/230
.553/.531
221/166
75.1%
69/82.6
204/245
.477/.452
225/170
75.6%
70.2/84.6
208/251
.405/.386
----192/147
76.8%
1.32/2.07
.409/.324
World S/R Torquer Ported Blackstone Iron180/-1.94/1.506781/66
81.5%
151/123
81.5%
214/149
69.6%
72.4/84.3
215/250
.802/.722
252/162
64.3%
85.3/91.7
253/272
.708/.589
258/172
66.7%
87.3/97.3
259/288
.58/.50
266/177
66.5%
90/100
267/297
.498/.429
270/177
65.6%
91.3/100
271/297
.433/.368
---235/160
68%
1.50
.393/.304
World S/R Torque Tri-Mark IronN/A2.02/1.60N/A64/53
82.8%
128/110
85.9%
176/126
71.6%
54.9/62.7
163/186
.633/.572
194/135
69.6%
60.5/67.1
179/199
.523/.46
196/136
69.4%
61.2/67.6
181/200
.423/.371
198/137
69.2%
61.8/68.1
183/202
.356/.311
----178/129
72.2%
-
.409/.324
World S/R Torque Ported Tri-Mark Stealth IronN/A2.02/1.60N/A70/59
84.3%
137/114
83.2%
188/136
72.3%
58.7/67.6
174/200
.676/.618
220/149
67.7%
68.6/74.1
203/220
.594/.508
227/155
68.3%
70.8/77.1
210/228
.49/.422
230/160
69.6%
71.8/79.6
213/236
.414/.363
----200/143
71.3%
-
.409/.324
World CHP Iron200/-2.02/1.60
-
No Pipe
N/A-132/98
74.2%
187/123
65.8%
58.4/61.2
173/181
.673/.559
225/138
61.3%
70.2/68.6
208/203
.607/.47
240/150
62.5%
74.9/74.6
222/221
.518/.409
243/156
64.2%
75.8/77.6
225/230
.437/.354
----205/133
64.8%
1.22
.409/.324
World Sportsman II SF600 Iron200/692.02/1.60
-
No Pipe
64/72-----260/176
67.7%
81.1/87.5
240/259
.468/.40
-----
-
1.30/2.55
.409/.324
World Sportsman II Iron200/642.02/1.60
-
Pipe
64/72--187/131
70.1%
58.4/65.2
173/193
.673/.595
225/150
66.7%
70.2/74.6
208/221
.607/.511
240/164
68.3%
74.9/81.6
222/242
.518/.447
243/162
66.7%
75.8/80.6
225/239
.437/.368
----224/152
67.8%
1.22/2.56
.409/.324
World Sportsman II Cast Heads IronN/A2.02/1.60N/A64/60
93.8%
130/107
82.3%
186/123
66.1%
58/61.2
172/181
.669/.559
212/136
64.2%
66.2/67.6
196/200
.572/.463
230/142
61.7%
71.8/70.6
213/209
.496/.387
231/143
61.9%
72.1/71.1
214/211
.416/.325
235/143
60.9%
73.3/71.1
217/211
.362/.278
---204/132
64.9%
-
.409/.324
World Sportsman II Out of Box Weingartner Racing IronN/A2.02/1.60
4.125
No Pipe
N/A72/55
76.4%
133/97
72.9%
182/128
70.3%
56.8/63.7
168/189
.655/.581
228/145
63.6%
71.1/72.1
211/214
.615/.494
257/160
62.3%
80.2/79.6
238/236
.555/.436
264/183
69.3%
82.4/91
244/270
.475/.416
263/194
73.8%
82.1/96.5
243/286
.406/.378
---221/151
68.3%
-
.409/.324
World Sportsman II Ported Cast Heads IronN/A2.02/1.60N/A68/58
85.3%
139/118
84.9%
196/158
80.6%
61.2/78.6
181/233
.705/.718
235/178
75.7%
73.3/88.5
217/262
.634/.606
256/186
72.7%
79.9/92.5
237/274
.553/.507
272/190
69.9%
84.9/94.5
251/280
.489/.431
278/192
69.1%
86.7/95.5
257/283
.429/.374
---229/170
74.3%
-
.409/.324
World Sportsman II Ported Iron212/-2.05/1.60
-
No Pipe
N/A--189/145
76.7%
57.3/72.1
170/214
.67/.659
238/170
71.4%
72.1/84.6
214/251
.633/.579
270/182
67.4%
81.8/90.5
242/268
.574/.496
284/190
66.9%
86/94.5
255/280
.503/.431
----245/172
70%
1.34
.415/.324
World Sportsman II Dr Js Performance Iron200/-2.02/1.60
-
Pipe
N/A65/63
96.9%
134/110
82.1%
188/130
69.1%
58.7/64.7
174/192
.676/.59
214/143
66.8%
66.8/71.1
198/211
.577/.487
224/150
67%
69.9/74.6
207/221
.484/.409
231/153
66.2%
72.1/76.1
214/225
.416/.347
234/156
66.7%
73/77.6
216/230
.361/.304
---204/140
68.7%
1.17
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
World Sportsman II Ported Dr Js Performance IronN/A2.05/1.60
-
Pipe
N/A72/64
88.9%
140/110
78.6%
194/134
69.1%
58.8/66.6
174/197
.688/.609
236/163
69.1%
71.5/81.1
212/240
.627/.555
261/205
78.5%
79.1/102
234/302
.555/.559
271/223
82.3%
82.1/111
243/329
.48/.506
276/233
84.4%
83.6/116
248/343
.419/.454
---230/178
77.5%
-
.415/.324
World Sportsman II Ported IronN/A2.02/1.60
4.155
N/A62/64
103%
134/118
88.1%
193/158
81.9%
60.2/78.6
178/233
.694/.718
239/199
83.3%
74.6/99
221/293
.645/.678
263/215
81.7%
82.1/107
243/317
.568/.586
268/224
83.6%
83.6/111
248/330
.482/.509
----219/183
83.3%
-
.409/.324
World Sportsman II Ported Bullet Cylinder Heads Iron219/892.05/1.606872/57
79.2%
145/105
72.4%
206/142
68.9%
62.4/70.6
185/209
.73/.645
250/167
66.8%
75.7/83.1
224/246
.665/.569
270/190
70.4%
81.8/94.5
242/280
.574/.518
288/202
70.1%
87.3/100
259/298
.51/.459
297/215
72.4%
90/107
267/317
.451/.419
---243/170
70.1%
1.36/2.42
.415/.324
World Sportsman 200 Tri-Mark Stealth Iron200/-2.02/1.60N/A61/60
98.4%
128/113
88.3%
184/135
73.4%
57.4/67.1
170/199
.662/.613
210/140
66.7%
65.5/69.6
194/206
.567/.477
230/144
62.6%
71.8/71.6
213/212
.496/.392
235/146
62.1%
73.3/72.6
217/215
.423/.332
----197/136
68.7%
1.18
.409/.324
World Sportsman 200 Ported Tri-Mark Stealth IronN/A2.02/1.60N/A70/59
84.3%
144/120
83.3%
197/147
74.6%
61.5/73.1
182/217
.709/.668
230/161
70%
71.8/80.1
213/237
.621/.548
247/170
68.8%
77.1/84.6
228/251
.533/.463
255/174
68.2%
79.6/86.5
236/256
.459/.395
----215/154
71.9%
-
.409/.324
World Motown 220 SF600 Iron220/702.08/1.60
-
No Pipe
6466/56
84.8%
132/117
88.6%
191/154
80.6%
56.2/76.6
167/227
.667/.699
235/176
74.9%
69.2/87.5
205/259
.616/.60
266/189
71.1%
78.3/94
232/279
.558/.515
284/198
69.7%
83.6/98.5
248/292
.496/.45
287/202
70.4%
84.5/100
250/298
.43/.393
284/205
72.2%
83.6/102
248/302
.372/.349
--240/177
73.9%
1.30/2.93
.421/.324
World Motown 220220/702.08/1.60N/A-125/105
84%
187/139
74.3%
55/69.1
163/205
.653/.631
225/166
73.8%
66.2/82.6
196/245
.59/.565
248/182
73.4%
73/90.5
216/268
.52/.496
263/190
72.2%
77.4/94.5
229/280
.459/.431
266/193
72.6%
78.3/96
232/284
.398/.376
---219/163
74.2%
1.21/2.76
.421/.324
World Motown 220 Iron CHP220/792.06/1.606760/50
83.3%
123/109
88.6%
177/142
80.2%
53.1/70.6
157/209
.624/.645
222/172
77.5%
66.6/85.5
197/253
.587/.586
243/187
77%
72.9/93
216/276
.514/.51
260/195
75%
78/97
231/287
.459/.443
----205/161
78.5%
1.18/2.47
.417/.324
World Motown 215 SF600 Alum215/702.08/1.60
-
No Pipe
N/A69/54
78.3%
128/107
83.6%
180/141
78.3%
53/70.1
157/208
.629/.64
227/162
71.4%
66.8/80.6
198/239
.595/.552
263/177
67.3%
77.4/88
229/261
.551/.482
279/186
66.7%
82.1/92.5
243/274
.487/.422
268/194
72.4%
78.9/96.5
234/286
.401/.378
268/197
73.5%
78.9/98
234/290
.351/.336
--230/166
72.2%
1.30/2.81
.421/.324
World Motown 215 SF1020 Alum215/702.08/1.60
-
No Pipe
N/A66/51
77.3%
122/102
83.6%
171/134
78.4%
50.3/66.6
149/197
.597/.609
216/154
71.3%
63.6/76.6
188/227
.566/.525
250/168
67.2%
73.6/83.6
218/248
.524/.458
265/177
66.8%
78/88
231/261
.463/.402
255/184
72.2%
75/91.5
222/271
.382/.358
255/187
73.3%
75/93
222/276
.334/.319
--219/158
72.1%
1.23/2.67
.421/.324
World Motown 235 SF600 Alum235/702.08/1.60
-
No Pipe
6465/56
86.2%
135/107
79.3%
198/147
74.2%
58.3/73.1
173/217
.692/.668
247/174
70.4%
72.7/86.5
215/256
.647/.593
284/174
61.3%
83.6/86.5
248/256
.595/.474
296/203
68.6%
87.1/101
258/299
.517/.461
300/211
70.3%
88.3/105
262/311
.449/.411
301/215
71.4%
88.6/107
262/317
.394/.366
--252/176
69.9%
1.28/3.07
.421/.324
World Motown 235 SF1020 Alum235/702.08/1.60
-
No Pipe
6462/53
85.5%
128/102
79.7%
188/140
74.5%
55.3/69.6
164/206
.657/.636
235/165
70.2%
69.2/82.1
205/243
.616/.562
270/183
67.8%
79.5/91
235/270
.566/.499
281/193
68.7%
82.7/96
245/284
.491/.438
285/200
70.2%
83.9/99.5
249/295
.427/.389
286/204
71.3%
84.2/101
249/301
.375/.347
--239/170
71%
1.22/2.91
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
World Motown 250 CNC SF600 Alum250/-2.10/1.60
-
No Pipe
N/A73/66
90.4%
137/123
89.8%
206/166
80.6%
59.5/82.6
176/245
.713/.754
262/193
73.7%
75.6/96
224/284
.68/.657
297/211
71%
85.7/105
254/311
.617/.575
309/222
71.8%
89.2/110
264/327
.535/.504
319/229
71.8%
92.1/114
273/337
.473/.446
322/232
72%
93/115
275/342
.418/.395
--265/197
74.3%
1.29
.425/.324
World Motown 23 Deg SF600 Alum235/702.08/1.60
-
No Pipe
64-------304/219
72%
89.5/109
265/323
.398/.373
---
-
1.29/3.13
.421/.324
World Motown 23 Deg CNC SF600 Alum235/702.08/1.60
-
No Pipe
64-------329/238
72.3%
96.8/118
287/351
.431/.405
---
-
1.40/3.40
.421/.324
World Motown 23 Deg CNC SF1020 Alum235/702.08/1.60
-
No Pipe
64-------306/220
71.9%
90.1/109
267/324
.401/.375
---
-
1.30/3.14
.421/.324
World Motown 23 Deg / Kuntz CNC Alum250/902.10/1.6072-----------
-
-
.425/.324
World Motown 23 Deg Vortec SF600 Alum215/702.08/1.60
-
No Pipe
64-----283/189
66.8%
83.3/94
247/279
.494/.429
-----
-
1.32/2.70
.421/.324
World Motown 23 Deg Vortec SF1020 Alum215/702.08/1.60
-
No Pipe
64-----265/177
66.8%
78/88
231/261
.463/.402
-----
-
1.23/2.53
.421/.324
Ultra Pro Machining Billet 9 Deg AlumN/A2.20/1.625N/A70/54
77.1%
153/103
67.3%
227/156
68.7%
59.7/75.2
177/223
.75/.698
300/209
69.7%
78.9/101
234/299
.743/.701
360/243
67.5%
94.7/117
281/347
.714/.652
406/266
65.5%
107/128
316/380
.671/.595
421/279
66.3%
111/135
328/399
.596/.535
---311/209
67.3%
-
.446/.329
Ultra Pro Machining Billet 9 Deg 4.5" BS I-50 E-50 AlumN/A2.23/1.625N/A73/54
74%
153/109
71.2%
237/166
70%
60.7/80
180/237
.772/.742
310/220
71%
79.4/106
235/314
.758/.738
368/250
67.9%
94.2/121
279/357
.72/.671
415/274
66%
106/132
315/391
.676/.613
423/287
67.8%
108/138
321/410
.591/.55
433/294
67.9%
111/142
328/420
.529/.493
--334/229
68.4%
-
.452/.329
Ultra Pro Machining Billet 9 Deg 4.5" BS I-55 E-55 Alum320/2152.25/1.60N/A65/53
81.5%
135/104
77%
224/160
71.4%
56.3/79.6
167/236
.724/.727
297/216
72.7%
74.7/107
221/318
.719/.736
363/249
68.6%
91.3/124
271/367
.703/.679
413/275
66.6%
104/137
308/405
.667/.625
440/288
65.5%
111/143
328/424
.609/.561
440/295
67%
111/147
328/435
.533/.502
--330/227
68.6%
1.38/1.37
.456/.324
 
 
LSx     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS Ported Texas Speed AlumN/A2.02/1.57
3.90
No Pipe
N/A65/60
92.3%
131/106
80.9%
192/146
76%
59.9/75.4
178/223
.691/.676
241/181
75.1%
75.2/93.5
223/277
.65/.628
273/203
74.4%
85.2/105
252/311
.589/.564
292/218
74.7%
91.1/113
270/334
.525/.505
----226/171
75.6%
-
.409/.318
GM LSX CNC Texas Speed Alum274/832.20/1.61
-
No Pipe
7072/64
88.9%
171/106
62%
249/154
61.8%
65.5/75.6
194/224
.823/.695
309/200
64.7%
81.3/98.2
241/291
.766/.677
354/232
65.5%
93.1/114
276/338
.702/.628
384/248
64.6%
101/122
299/361
.634/.56
397/261
65.7%
104/128
309/380
.562/.505
---311/200
64.4%
1.45/3.14
.446/.326
GM LS1 853 SF600 Alum200/702.00/1.5566.767/52
77.6%
122/97
79.5%
178/133
74.7%
56.7/70.5
168/209
.647/.624
215/156
72.6%
68.4/82.7
203/245
.586/.549
219/170
77.6%
69.7/90.1
207/267
.477/.478
227/180
79.3%
72.3/95.4
214/283
.412/.422
----192/147
76.6%
1.14/2.57
.405/.314
GM LS1 853 Ported MTI Stage IIE AlumN/A2.02/1.55N/A65/53
81.5%
135/105
77.8%
195/141
72.3%
60.8/74.7
180/221
.702/.661
244/165
67.6%
76.1/87.4
226/259
.658/.58
276/193
69.9%
86.1/102
255/303
.596/.543
300/211
70.3%
93.6/112
277/331
.54/.495
----230/163
70.9%
-
.409/.314
GM LS1 SF600N/A2.00/1.55
3.90
1 7/8" Pipe
N/A-136/108
79.4%
196/145
74%
62.4/76.8
185/228
.712/.68
217/170
78.3%
69.1/90.1
205/267
.591/.598
224/186
83%
71.3/98.6
211/292
.488/.523
230/198
86.1%
73.2/105
217/311
.418/.464
----201/161
80.5%
-
.405/.314
GM LS1 Alum204/702.00/1.55
3.90
N/A-148/103
69.6%
200/152
76%
63.7/80.6
189/239
.727/.713
216/167
77.3%
68.8/88.5
204/262
.589/.587
225/181
80.4%
71.6/95.9
212/284
.491/.509
238/190
79.8%
75.8/101
224/298
.432/.445
----205/159
77.2%
1.17/2.71
.405/.314
GM LS1 Alum204/702.00/1.5565-123/108
87.8%
180/147
81.7%
57.3/77.9
170/231
.654/.689
219/172
78.5%
69.7/91.2
207/270
.597/.605
231/193
83.5%
73.5/102
218/303
.504/.543
-----188/155
82.3%
1.13/2.76
.405/.314
GM LS1 Alum CHP204/-2.00/1.55
-
Pipe
6583/62
74.7%
134/104
77.6%
189/136
72%
60.2/72.1
178/214
.687/.638
222/165
74.3%
70.7/87.4
209/259
.605/.58
240/179
74.6%
76.4/94.9
226/281
.523/.504
252/185
73.4%
80.2/98
238/290
.458/.434
----207/154
74.2%
1.24
.405/.314
GM LS1 241 Alum HRM205/702.00/1.55
4.03
6864/55
85.9%
137/106
77.4%
190/141
74.2%
60.5/74.7
179/221
.69/.661
216/179
82.9%
68.8/94.9
204/281
.589/.629
228/193
84.6%
72.6/102
215/303
.497/.543
238/203
85.3%
75.8/108
224/319
.432/.476
244/206
84.4%
77.7/109
230/323
.38/.414
---209/171
82%
1.19/2.94
.405/.314
GM LS1 Ported AP Engineering Alum235/-2.02/1.575
3.970
Pipe
N/A73/54
74%
150/111
74%
207/155
74.9%
64.6/79.6
191/236
.745/.715
252/195
77.4%
78.6/100
233/297
.68/.675
285/221
77.5%
88.9/113
263/336
.615/.612
292/231
79.1%
91.1/119
270/351
.525/.533
301/237
78.7%
93.9/122
278/360
.464/.469
---248/192
77.3%
1.28
.409/.319
GM LS1 Ported ET Performance 215 SF600 Alum215/-2.04/1.57
3.90
No Pipe
35-7274/57
77%
152/106
69.7%
219/150
68.5%
67/77.5
199/230
.78/.694
266/190
71.4%
81.4/98.1
241/291
.711/.66
301/204
67.8%
92.1/105
273/312
.643/.567
320/211
65.9%
97.9/109
290/323
.57/.488
----252/172
68.4%
1.49
.413/.318
GM LS1 Ported ET Performance 224 SF600 Alum224/-2.02/1.57
3.90
No Pipe
6768/56
82.4%
143/112
78.3%
196/158
80.6%
61.2/81.6
181/242
.705/.731
247/190
76.9%
77.1/98.1
228/291
.666/.66
280/206
73.6%
87.4/106
259/315
.604/.572
303/214
70.6%
94.5/111
280/328
.545/.495
311/218
70.1%
97/113
288/334
.48/.432
---247/183
74.2%
1.39
.409/.318
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS1 Ported ET Performance 225 SF600 Alum225/-2.08/1.57
4.00
No Pipe
35-7271/57
80.3%
153/114
74.5%
208/164
78.8%
61.2/84.7
181/251
.727/.759
265/204
77%
78/105
231/312
.694/.708
308/224
72.7%
90.6/116
269/343
.646/.622
328/231
70.4%
96.5/119
286/354
.573/.535
320/236
73.8%
94.2/122
279/361
.479/.468
---264/196
74.1%
1.46
.421/.318
GM LS1 CNC M2 AlumN/A2.02/1.60N/A66/54
81.8%
141/114
80.9%
195/160
82.1%
60.8/79.6
180/236
.702/.727
252/190
75.4%
78.6/94.5
233/280
.68/.647
292/206
70.5%
91.1/102
270/304
.63/.561
317/220
69.4%
98.9/109
293/324
.57/.50
----239/178
74.4%
-
.409/.324
GM LS1 Ported No Rush AlumN/A2.02/1.57
-
No Pipe
N/A70/57
81.4%
151/108
71.5%
209/154
73.7%
65.2/79.5
193/236
.752/.713
260/188
72.3%
81.1/97.1
240/288
.702/.653
287/210
73.2%
89.6/108
265/321
.62/.583
288/220
76.4%
89.9/114
266/337
.518/.509
297/227
76.4%
92.7/117
275/347
.458/.45
290/204
70.3%
90.5/105
268/312
.391/.354
--255/187
73.6%
-
.409/.318
GM LS1 Ported No Rush AlumN/A2.02/1.57
-
Pipe
N/A70/57
81.4%
151/113
74.8%
209/167
79.9%
65.2/86.3
193/256
.752/.773
260/212
81.5%
81.1/110
240/324
.702/.736
287/233
81.2%
89.6/120
265/357
.62/.647
288/249
86.5%
89.9/129
266/381
.518/.576
297/254
85.5%
92.7/131
275/389
.458/.504
290/204
70.3%
90.5/105
268/312
.391/.354
--255/205
80.4%
-
.409/.318
GM LS1 Ported Bullet Cylinder Heads Stage I Alum217/852.00/1.575777/54
70.1%
144/113
78.5%
213/158
74.2%
67.8/81.6
201/242
.774/.731
259/191
73.7%
82.4/98.7
244/292
.706/.663
262/206
78.6%
83.4/106
247/315
.571/.572
265/213
80.4%
84.4/110
250/326
.481/.493
----229/176
77.1%
1.22/2.51
.405/.318
GM LS1 Ported Bullet Cylinder Heads Stage II Alum221/912.02/1.5755772/57
79.2%
141/113
80.1%
203/158
77.8%
63.3/81.1
188/240
.73/.729
256/191
74.6%
79.9/98
237/290
.691/.661
280/206
73.6%
87.4/106
259/313
.604/.57
296/213
72%
92.4/109
274/324
.532/.491
----235/176
74.9%
1.34/2.34
.409/.319
GM LS1 Ported Bullet Cylinder Heads Stage III Alum225/912.08/1.5755772/57
79.2%
141/113
80.1%
203/158
77.8%
59.7/81.1
177/240
.709/.729
256/191
74.6%
75.3/98
223/290
.671/.661
280/206
73.6%
82.4/106
244/313
.587/.57
296/213
72%
87.1/109
258/324
.517/.491
----235/176
74.9%
1.32/2.34
.421/.319
GM LS1 CNC RLD Performance Alum217/-2.00/1.55N/A-132/109
82.6%
187/147
78.6%
59.5/77.9
176/231
.679/.689
238/175
73.5%
75.8/92.7
224/275
.649/.615
274/193
70.4%
87.2/102
258/303
.597/.543
281/206
73.3%
89.4/109
265/323
.511/.483
----222/166
74.6%
1.29
.405/.314
GM 5.3L CCM Alum205/-1.89/1.55
3.78
6065/52
80%
133/101
75.9%
189/134
70.9%
67.4/71
200/210
.727/.628
208/161
77.4%
74.1/85.3
220/253
.60/.566
219/175
79.9%
78.1/92.7
231/275
.505/.492
223/187
83.9%
79.5/99.1
236/294
.429/.438
----194/152
78%
1.09
.383/.314
GM 5.3L Ported West Coast Stage 1 CCM Alum209/-1.94/1.57
3.78
6065/57
87.7%
141/109
77.3%
187/150
80.2%
63.3/77.5
187/230
.701/.694
227/175
77.1%
76.8/90.4
228/268
.638/.608
256/198
77.3%
86.6/102
257/303
.575/.55
252/211
83.7%
85.3/109
253/323
.472/.488
----213/169
79.3%
1.22
.393/.318
GM 5.3L Ported Stage II ForceFed High PerformanceN/A2.02/1.57N/A67/62
92.5%
133/109
82%
194/148
76.3%
60.5/76.4
179/227
.698/.685
242/184
76%
75.5/95
224/282
.653/.639
274/205
74.8%
85.5/106
253/314
.591/.569
296/220
74.3%
92.4/114
274/337
.532/.509
----228/173
76%
-
.409/.318
GM 5.3L Ported Absolute Speed AlumN/A2.02/1.60N/A-142/116
81.7%
203/159
78.3%
63.3/79.1
188/234
.73/.722
256/196
76.6%
79.9/97.5
237/289
.691/.668
291/215
73.9%
90.8/107
269/317
.628/.586
314/228
72.6%
98/113
290/336
.565/.518
----241/183
75.8%
-
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM 5.3L Ported Absolute Speed AlumN/A2.02/1.60N/A-144/117
81.3%
204/157
77%
63.7/78.1
189/231
.734/.713
256/194
75.8%
79.9/96.5
237/286
.691/.661
293/218
74.4%
91.4/108
271/321
.632/.594
306/224
73.2%
95.5/111
283/330
.55/.509
----241/182
75.6%
-
.409/.324
GM 5.3L Ported Texas Speed AlumN/A-
3.91
N/A81/52
64.2%
150/114
76%
208/153
73.6%
-
256/183
71.5%
-
286/206
72%
-
285/221
77.5%
-
----237/175
74%
GM 5.3L CNC FFHP Stage 2.5 SF600 Alum229/842.055/1.60
3.905
1 3/4" Pipe
6271/64
90.1%
148/119
80.4%
215/161
74.9%
64.8/80.1
192/237
.76/.731
256/199
77.7%
77.2/99
229/293
.679/.678
289/228
78.9%
87.1/113
258/336
.613/.621
311/235
75.6%
93.8/117
278/346
.55/.534
----244/188
77.3%
1.36/2.80
.416/.324
GM 5.3L Ported Patriot Stage 3 SF1020 AlumN/A2.055/1.60
3.905
N/A70/60
85.7%
149/113
75.8%
210/152
72.4%
63.3/75.6
188/224
.743/.69
251/189
75.3%
75.7/94
224/279
.666/.644
284/215
75.7%
85.6/107
254/317
.603/.586
302/230
76.2%
91.1/114
270/339
.534/.522
----239/180
75.2%
-
.416/.324
GM LS1 806 NPSN/A2.00/1.55
4.016
No Pipe
N/A66/55
83.3%
129/98
76%
182/129
70.9%
57.9/68.4
172/203
.661/.605
214/155
72.4%
68.1/82.1
202/243
.583/.545
225/167
74.2%
71.6/88.5
212/262
.491/.47
231/173
74.9%
73.5/91.7
218/272
.42/.406
236/177
75%
75.1/93.8
223/278
.368/.356
---203/150
73.9%
-
.405/.314
GM LS1 5.3L 862 Ported ET Performance SF600 Alum230/-2.055/1.57
4.00
No Pipe
64-7282/58
70.7%
162/115
71%
210/154
73.3%
63.3/79.5
188/236
.743/.713
265/187
70.6%
79.9/96.6
237/286
.703/.649
297/209
70.4%
89.5/108
265/320
.63/.58
320/222
69.4%
96.5/115
286/340
.566/.514
----251/177
70.7%
1.39
.416/.318
GM LS1 5.3L 862 Ported ForceFed SF600 AlumN/A2.00/1.55N/A-140/112
80%
202/157
77.7%
64.3/83.2
191/247
.734/.736
247/193
78.1%
78.6/102
233/303
.673/.679
282/221
78.4%
89.8/117
266/347
.615/.622
296/232
78.4%
94.2/123
279/364
.538/.544
----233/183
78.4%
-
.405/.314
GM LS1 5.3L Ported TEA Stage 1.5 AlumN/A2.02/1.57N/A67/54
80.6%
140/122
87.1%
203/172
84.7%
63.3/88.8
188/263
.73/.796
251/218
86.9%
78.3/113
232/334
.677/.757
289/244
84.4%
90.2/126
267/373
.624/.678
314/260
82.8%
98/134
290/398
.565/.602
----239/203
84.9%
-
.409/.318
GM LS1 5.3L Ported TEA Stage 2 AlumN/A2.02/1.57N/A67/57
85.1%
140/111
79.3%
208/169
81.3%
64.9/87.3
192/259
.748/.782
252/213
84.5%
78.6/110
233/326
.68/.739
290/241
83.1%
90.5/124
268/369
.626/.669
317/255
80.4%
98.9/132
293/390
.57/.59
----241/198
81.9%
-
.409/.318
GM LS1 5.3L Ported TEA Stage 3 AlumN/A-N/A67/55
82.1%
143/115
80.4%
211/157
74.4%
-
257/201
78.2%
-
299/256
85.6%
-
326/276
84.7%
-
----247/201
81.3%
GM LM7 5.3L Ported West Coast Stage 2 AlumN/A1.94/1.5763-----305/223
73.1%
103/115
306/341
.571/.516
-----
-
-
.393/.318
GM LM7 5.3L Ported West Coast Stage 2 Alum235/852.02/1.5766-----305/223
73.1%
95.2/115
282/341
.549/.516
-----
-
1.30/2.62
.409/.318
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LM7 LS 5.3l Ported Patriot Performance Stage I Alum213/782.00/1.5566.763/57
90.5%
128/103
80.5%
188/141
75%
59.8/74.7
177/221
.683/.661
234/176
75.2%
74.5/93.3
221/276
.638/.619
268/196
73.1%
85.3/104
253/308
.584/.551
289/212
73.4%
92/112
273/333
.525/.497
----221/166
74.8%
1.36/2.72
.405/.314
GM LS1 5.3l / 5.7L Ported Patriot Performance Stage II OLD Alum213/782.02/1.5766.767/61
91%
133/108
81.2%
194/147
75.8%
60.5/75.9
179/225
.698/.68
242/183
75.6%
75.5/94.5
224/280
.653/.635
274/205
74.8%
85.5/106
253/314
.591/.569
296/220
74.3%
92.4/114
274/337
.532/.509
----228/173
75.8%
1.39/2.82
.409/.318
GM LS1 5.3l / 5.7L Ported Patriot Performance Stage II Alum220/672.02/1.5763/6767/61
91%
133/108
81.2%
194/147
75.8%
60.5/75.9
179/225
.698/.68
242/183
75.6%
75.5/94.5
224/280
.653/.635
274/205
74.8%
85.5/106
253/314
.591/.569
296/220
74.3%
92.4/114
274/337
.532/.509
----228/173
75.8%
1.35/3.28
.409/.318
GM LS1 5.7L Ported TEA Stage 1 AlumN/A-N/A68/50
73.5%
138/105
76.1%
203/151
74.4%
-
243/191
78.6%
-
274/222
81%
-
292/245
83.9%
-
----230/183
79.5%
GM LS1 5.7L Ported TEA Stage 1 AlumN/A2.00/1.55
3.90
Pipe
N/A67/60
89.6%
137/113
82.5%
202/163
80.7%
64.3/86.4
191/256
.734/.764
249/202
81.1%
79.3/107
235/317
.679/.71
288/228
79.2%
91.7/121
272/358
.628/.641
296/244
82.4%
94.2/129
279/383
.538/.572
----234/190
81.1%
-
.405/.314
GM LS1 5.7L Ported TEA Stage 1.5 AlumN/A2.02/1.57N/A68/52
76.5%
139/108
77.7%
200/160
80%
62.4/82.6
185/245
.72/.741
248/209
84.3%
77.4/108
229/320
.669/.726
283/237
83.7%
88.3/122
262/363
.611/.658
300/255
85%
93.6/132
277/390
.54/.59
----234/194
82.8%
-
.409/.318
GM LS1 5.7L Ported West Coast Stage 2 AlumN/A2.02/1.5770-----293/223
76.1%
91.4/115
271/341
.527/.516
-----
-
-
.409/.318
GM LS 5.3L 241 Weingartner Racing AlumN/A2.00/1.55
4.125
No Pipe
N/A74/54
73%
156/106
67.9%
214/151
70.6%
68.1/80
202/237
.778/.708
252/176
69.8%
80.2/93.3
238/276
.687/.619
251/187
74.5%
79.9/99.1
237/294
.547/.526
256/191
74.6%
81.5/101
241/300
.465/.448
261/195
74.7%
83.1/103
246/306
.406/.392
---232/168
72.4%
-
.405/.314
GM LS 5.3lL Ported PRC Stage 2.5 Alum215/-2.02/1.575
3.91
No Pipe
N/A-147/111
75.5%
206/145
70.4%
64.3/74.4
190/221
.741/.669
254/185
72.8%
79.3/95
235/281
.685/.64
291/204
70.1%
90.8/105
269/310
.628/.565
312/223
71.5%
97.4/114
288/339
.561/.514
----242/174
71.7%
1.45
.409/.319
GM LS1 5.7L 241 Advanced Induction SF600 Alum204/-2.00/1.55
3.90
No Pipe
N/A66/55
83.3%
139/101
72.7%
193/136
70.5%
61.4/72.1
182/214
.701/.638
215/160
74.4%
68.4/84.8
203/251
.586/.563
226/171
75.7%
71.9/90.6
213/269
.493/.481
233/180
77.3%
74.2/95.4
220/283
.423/.422
238/183
76.9%
75.8/97
224/287
.371/.368
---207/155
74.8%
1.17
.405/.314
GM LS1 5.7L 241 Ported 219 Advanced Induction SF600 Alum219/-2.00/1.55
3.90
No Pipe
N/A66/54
81.8%
143/101
70.6%
208/144
69.2%
66.2/76.3
196/226
.756/.675
251/174
69.3%
79.9/92.2
237/273
.684/.612
271/197
72.7%
86.3/104
256/309
.591/.554
285/209
73.3%
90.7/111
269/328
.518/.49
287/215
74.9%
91.4/114
271/338
.447/.432
---241/173
72%
1.31
.405/.314
GM LS1 241 Ported Chad Speier AlumN/A2.02/1.57
4.00
1 7/8" Pipe
N/A-155/112
72.3%
219/155
70.8%
68.3/80.1
202/237
.788/.717
263/187
71.1%
82.1/96.6
243/286
.71/.649
278/211
75.9%
86.7/109
257/323
.60/.586
289/233
80.6%
90.2/120
267/357
.52/.539
295/244
82.7%
92.1/126
273/373
.455/.484
298/250
83.9%
93/129
276/383
.402/.434
301/253
84.1%
93.9/131
278/387
.361/.39
303/255
84.2%
94.5/132
280/390
.327/.354
267/211
79.1%
-
.409/.318
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS1 6.0L Ported AP Engineering Stage I AlumN/A2.02/1.575
3.970
N/A66/62
93.9%
139/117
84.2%
213/161
75.6%
66.5/82.6
197/245
.766/.743
259/200
77.2%
80.8/103
239/304
.699/.692
283/219
77.4%
88.3/112
262/333
.611/.606
297/229
77.1%
92.7/118
275/348
.534/.528
305/243
79.7%
95.2/125
282/370
.47/.481
---249/195
78.1%
-
.409/.319
GM LS1 6.0L Ported AP Engineering Alum235/902.08/1.60
4.125
Pipe
N/A75/63
84%
153/115
75.2%
217/163
75.1%
63.9/81.1
189/240
.758/.74
265/207
78.1%
78/103
231/305
.694/.705
310/243
78.4%
91.2/121
270/358
.65/.662
327/262
80.1%
96.2/130
285/386
.571/.595
328/272
82.9%
96.5/135
286/401
.491/.529
329/273
83%
96.8/136
287/402
.431/.465
--276/219
79.6%
1.40/3.03
.421/.324
GM LS1 6.0L Ported ET Performance Alum237/-2.055/1.57
3.90
64-7067/52
77.6%
138/112
81.2%
198/159
80.3%
59.7/82.1
177/243
.70/.736
249/182
73.1%
75.1/94
222/279
.66/.632
286/200
69.9%
86.2/103
255/306
.607/.555
311/210
67.5%
93.8/108
278/321
.55/.486
----236/173
73%
1.31
.416/.318
GM LS2 243 Ported Greg Good 2 AlumN/A2.055/1.60
4.00
N/A-147/126
85.7%
225/171
76%
67.8/85
201/252
.796/.777
279/215
77.1%
84.1/107
249/317
.74/.732
321/237
73.8%
96.8/118
287/349
.681/.646
337/244
72.4%
102/121
301/360
.596/.554
----262/199
75.9%
-
.416/.324
GM LS1/LS2 Ported PRC Alum215/842.04/1.60
4.00
No Pipe
6268/56
82.4%
145/115
79.3%
214/167
78%
65.5/83.1
194/246
.762/.759
271/202
74.5%
82.9/100
246/298
.724/.688
304/219
72%
93/109
276/323
.65/.597
318/238
74.8%
97.3/118
288/351
.566/.541
----250/188
75.2%
1.48/2.83
.413/.324
GM LS1/LS2 Ported PRC Alum237/852.10/1.60
4.03
No Pipe
6866/57
86.4%
147/117
79.6%
225/170
75.6%
65/84.6
192/251
.779/.772
284/206
72.5%
82/102
243/304
.737/.702
325/227
69.8%
93.8/113
278/335
.675/.619
334/241
72.2%
96.4/120
286/355
.578/.547
----263/192
73.1%
1.41/2.84
.425/.324
GM LS6N/A2.00/-N/A-156/-204/-
64.9
192
.741
243/-
77.3
229
.662
268/-
85.3
253
.584
278/-
88.5
262
.505
----230
-
-
.405
GM LS6 SF600N/A2.00/1.55
3.90
1 7/8" Pipe
N/A62/59
95.2%
126/108
85.7%
184/143
77.7%
58.6/75.8
174/225
.669/.67
224/163
72.8%
71.3/86.4
211/256
.61/.573
251/176
70.1%
79.9/93.3
237/276
.547/.495
257/183
71.2%
81.8/97
242/287
.467/.429
----208/155
74.2%
-
.405/.314
GM LS6/LS2 243 / 799 Advanced Induction SF600 Alum211/-2.00/1.55
4.00
No Pipe
N/A66/52
78.8%
139/110
79.1%
194/147
75.8%
61.8/77.9
183/231
.705/.689
236/167
70.8%
75.1/88.5
223/262
.643/.587
265/175
66%
84.4/92.7
250/275
.578/.492
260/183
70.4%
82.8/97
245/287
.472/.429
262/186
71%
83.4/98.6
247/292
.408/.374
---226/161
71.4%
1.26
.405/.314
GM LS6/LS2 243 / 799 Ported 226 Advanced Induction SF600 Alum226/-2.00/1.55
4.00
No Pipe
N/A66/53
80.3%
146/109
74.7%
215/144
67%
68.4/76.3
203/226
.781/.675
259/170
65.6%
82.4/90.1
244/267
.706/.598
290/197
67.9%
92.3/104
274/309
.632/.554
300/212
70.7%
95.5/112
283/333
.545/.497
301/221
73.4%
95.8/117
284/347
.469/.444
---252/176
69.7%
1.33
.405/.314
GM LS6/LS2 243 / 799 Ported 232 Advanced Induction SF600 Alum226/-2.00/1.55
4.00
1 7/8" Pipe
N/A69/53
76.8%
146/115
78.8%
214/157
73.4%
68.1/83.2
202/247
.778/.736
258/204
79.1%
82.1/108
243/320
.703/.717
293/256
87.4%
93.3/136
276/402
.639/.72
305/271
88.9%
97.1/144
288/426
.554/.635
315/277
87.9%
100/147
297/435
.491/.557
---255/213
83.6%
1.39
.405/.314
GM LS6/LS2 243 / 799 Ported Flow Tech Induction AlumN/A2.00/1.55
3.90
1 3/4 Pipe
N/A65/55
84.6%
146/120
82.2%
200/164
82%
63.7/86.9
189/258
.727/.769
248/192
77.4%
78.9/102
234/301
.676/.675
285/202
70.9%
90.7/107
269/317
.621/.568
303/209
69%
96.4/111
286/328
.551/.49
----236/177
75%
-
.405/.314
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS6/LS2 CNC RLD Performance Alum236/-2.00/1.5565-139/116
83.5%
200/151
75.5%
63.7/80
189/237
.727/.708
256/184
71.9%
81.5/97.5
241/289
.698/.647
298/204
68.5%
94.9/108
281/320
.65/.574
317/215
67.8%
101/114
299/338
.576/.504
308/222 @.650
98
290
.48
---253/174
-
1.34
.405/.314
GM LS6 243 / 317 210/752.00/1.5564/71-----236/185
78.4%
75.1/98
223/290
.429/.434
-----
-
1.12/2.47
.405/.314
GM LS6 243 / 799 Ported PRC Stage 1 SF600 Alum226.5/752.00/1.5564.572/63
87.5%
142/121
85.2%
205/154
75.1%
65.3/81.6
193/242
.745/.722
255/191
74.9%
81.2/101
241/300
.695/.672
286/214
74.8%
91/113
270/336
.624/.602
305/220
72.1%
97.1/117
288/345
.554/.516
----239/180
75.4%
-
.405/.314
GM LS6 243 / 799 Ported PRC Stage 2 SF600 Alum238/752.02/1.5764.575/66
88%
151/124
82.1%
209/160
76.6%
65.2/82.6
193/245
.752/.741
260/194
74.6%
81.1/100
240/297
.702/.674
293/217
74.1%
91.4/112
271/332
.632/.603
315/227
72.1%
98.3/117
291/347
.567/.525
----246/184
75.1%
1.32/3.03
.409/.318
GM LS6 243 Ported West Coast Stage 2 Alum233.3/86.32.02/1.57
4.03
Pipe
6970/58
82.9%
142/119
83.8%
202/167
82.7%
63/86.3
187/256
.727/.773
246/206
83.7%
76.8/106
227/315
.664/.715
288/221
76.7%
89.9/114
266/338
.622/.614
312/234
75%
97.4/121
288/358
.561/.542
----238/189
79.6%
-
.409/.318
GM LS6 243 CNC M2 Race Systems Alum235/-2.08/1.60
4.03
6466/54
81.8%
141/114
80.9%
195/160
82.1%
57.4/79.6
170/236
.681/.727
252/190
75.4%
74.2/94.5
220/280
.66/.647
292/206
70.5%
85.9/102
255/304
.612/.561
319/215
67.4%
93.9/107
278/317
.557/.488
313/220
70.3%
92.1/109
273/324
.469/.428
---252/184
73.1%
1.36
.421/.324
GM LS6 243 Out of Box Ported MTI AlumN/A2.02/1.57N/A70/53
75.7%
138/103
74.6%
201/144
71.6%
62.7/74.4
186/220
.723/.667
250/190
76%
78/98.1
231/291
.675/.66
285/214
75.1%
88.9/111
263/328
.615/.594
316/226
71.5%
98.6/117
292/346
.568/.523
312/230
73.7%
97.4/119
288/352
.481/.456
---250/185
73.7%
-
.409/.318
GM LS6 243 NPSN/A2.00/1.55
-
No Pipe
N/A62/54
87.1%
134/103
76.9%
191/131
68.6%
60.8/69.4
180/206
.694/.614
230/153
66.5%
73.2/81.1
217/240
.627/.538
252/165
65.5%
80.2/87.4
238/259
.549/.464
248/173
69.8%
78.9/91.7
234/272
.451/.406
248/-
78.9
234
.386
---217/145
-
-
.405/.314
GM LS6 243 Ported NPSN/A2.00/1.55
-
No Pipe
N/A65/53
81.5%
132/106
80.3%
200/148
74%
63.7/78.4
189/232
.727/.694
252/178
70.6%
80.2/94.3
238/280
.687/.626
285/194
68.1%
90.7/103
269/305
.621/.546
303/203
67%
96.4/108
286/319
.551/.476
296/208
70.3%
94.2/110
279/327
.461/.418
301/212
70.4%
95.8/112
284/333
.41/.373
--253/178
70.6%
-
.405/.314
GM LS6 317 VJ Milled 0.030 Weingartner Racing AlumN/A2.00/1.55
4.125
No Pipe
N/A92/69
75%
169/126
74.6%
225/159
70.7%
71.6/84.3
212/250
.818/.745
263/180
68.4%
83.7/95.4
248/283
.717/.633
267/188
70.4%
85/99.6
252/295
.582/.529
268/190
70.9%
85.3/101
253/298
.487/.445
----238/169
70.7%
-
.405/.314
GM LS6 317 West Coast AlumN/A2.00/1.57
4.03
No Pipe
N/A65/53
81.5%
142/112
78.9%
204/147
72.1%
64.9/75.9
192/225
.741/.68
233/165
70.8%
74.2/85.2
220/253
.635/.573
250/174
69.6%
79.6/89.9
236/266
.545/.483
253/184
72.7%
80.5/95
239/282
.46/.426
----216/156
72.3%
-
.405/.318
GM LS6 317 Ported West Coast Stage 2 Alum232.4/86.3-
4.03
Pipe
73.570/59
84.3%
145/119
82.1%
210/174
82.9%
-
250/213
85.2%
-
288/228
79.2%
-
294/232
78.9%
-
----237/193
81.4%
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS6 317 / LQ9 Ported Meaux Racing AlumN/A2.08/1.6063-134/117
87.3%
212/172
81.1%
62.4/85.5
185/253
.741/.781
258/216
83.7%
75.9/107
225/318
.676/.736
286/231
80.8%
84.2/115
249/340
.60/.63
296/238
80.4%
87.1/118
258/351
.517/.541
302/241
79.8%
88.9/120
263/355
.452/.469
---248/203
81.7%
-
.421/.324
GM LS6 317 Ported Bullet Cylinder Heads AlumN/A2.00/1.575N/A96/58
60.4%
141/109
77.3%
199/148
74.4%
63.3/76
188/225
.723/.683
241/175
72.6%
76.7/89.8
227/266
.657/.606
263/189
71.9%
83.7/97
248/287
.573/.523
282/210
74.5%
89.8/108
266/319
.512/.484
----225/166
73.8%
-
.405/.319
GM LS6 317 Ported TEA Stage 1 AlumN/A2.00/1.555
4.00
1.875 Pipe
7264/57
89.1%
141/114
80.9%
212/166
78.3%
67.5/87.4
200/259
.77/.776
261/210
80.5%
83.1/111
246/328
.711/.736
302/235
77.8%
96.1/124
285/367
.658/.659
314/246
78.3%
99.9/130
296/384
.57/.575
----246/194
78.9%
-
.405/.315
GM LS6 CNC SDPCN/A2.00/1.55N/A67/50
74.6%
142/104
73.2%
210/150
71.4%
66.8/79.5
198/236
.763/.703
254/185
72.8%
80.9/98
240/290
.692/.651
290/203
70%
92.3/108
274/319
.632/.571
286/212
74.1%
91/112
270/333
.52/.497
----236/171
72.3%
-
.405/.314
GM LS6 Ported Stage II ForceFed High PerformanceN/A2.02/1.6059/6473/69
94.5%
143/127
88.8%
205/161
78.5%
64/80.1
190/237
.738/.731
246/198
80.5%
76.8/98.5
227/292
.664/.675
282/223
79.1%
88/111
261/329
.609/.608
309/231
74.8%
96.4/115
286/340
.556/.525
----237/188
79.3%
-
.409/.324
GM LS6 Ported TEA Stage 1 AlumN/A2.00/1.55
3.90
1 7/8" Pipe
N/A64/47
73.4%
145/114
78.6%
215/166
77.2%
68.4/88
203/261
.781/.778
254/222
87.4%
80.9/118
240/349
.692/.781
293/244
83.3%
93.3/129
276/383
.639/.686
310/256
82.6%
98.7/136
292/402
.563/.60
----243/200
82.3%
-
.405/.314
GM LS6 Ported TEA Stage 1.5 AlumN/A2.02/1.57N/A67/50
74.6%
139/119
85.6%
205/174
84.9%
64/89.9
190/266
.738/.805
254/224
88.2%
79.3/116
235/343
.685/.778
294/247
84%
91.7/128
272/378
.635/.686
320/257
80.3%
99.9/133
296/393
.576/.595
323/-
101
299
.498
---256/204
-
-
.409/.318
GM LS6 Ported TEA Stage 1.5 Jasson AlumN/A2.02/1.57N/A----281/258
91.8%
87.7/133
260/395
.607/.717
306/268
87.6%
95.5/138
283/410
.55/.62
----294/263
89.6%
-
.409/.318
GM LS6 Ported TEA Stage 2 Alum229/842.04/1.57
3.90
1.875 Pipe
6767/54
80.6%
139/120
86.3%
219/179
81.7%
67/92.5
199/274
.78/.829
271/224
82.7%
82.9/116
246/343
.724/.778
308/248
80.5%
94.2/128
279/380
.658/.689
320/260
81.3%
97.9/134
290/398
.57/.602
----251/206
82%
1.40/3.10
.413/.318
GM LS6 Ported TEA Stage 2 HRM Alum226/782.055/1.57
4.03
6366/60
90.9%
144/118
81.9%
214/163
76.2%
64.5/84.2
191/249
.757/.755
269/199
74%
81.1/103
240/305
.713/.691
310/223
71.9%
93.5/115
277/341
.658/.619
329/235
71.4%
99.2/121
294/360
.582/.544
310/231
74.5%
93.5/119
277/354
.47/.458
---263/195
74.2%
1.46/3.01
.416/.318
GM LS6 Ported TEA Stage 2.5 Out of Box SF600 Alum253/-2.02/1.57N/A73/59
80.8%
140/121
86.4%
205/175
85.4%
64/90.4
190/268
.738/.81
256/228
89.1%
79.9/118
237/349
.691/.792
295/264
89.5%
92.1/136
273/404
.637/.733
322/278
86.3%
100/144
298/425
.579/.643
337/-
105
312
.52
---259/213
-
1.33
.409/.318
GM LS6 Ported TEA Stage 3 AlumN/A-N/A73/52
71.2%
148/126
85.1%
219/182
83.1%
-
269/233
86.6%
-
311/260
83.6%
-
346/270
78%
-
----259/214
82.8%
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS6 Ported Katech Alum240/882.10/1.55N/A75/51
68%
153/127
83%
218/167
76.6%
62.9/88.5
186/262
.754/.783
267/207
77.5%
77.1/110
228/325
.693/.728
306/221
72.2%
88.3/117
262/347
.635/.622
330/230
69.7%
95.3/122
282/361
.571/.539
----255/190
74.7%
1.38/2.61
.425/.314
GM LS6 Ported Patriot AlumN/A2.02/1.5759/6472/65
90.3%
140/124
88.6%
202/160
79.2%
63/82.6
187/245
.727/.741
244/196
80.3%
76.1/101
226/300
.658/.68
280/220
78.6%
87.4/114
259/337
.604/.611
304/220
72.4%
94.9/114
281/337
.547/.509
----234/184
78.6%
-
.409/.318
GM LS6 Ported Patriot - Demirjian Alum235/852.05/1.60
3.90
1 3/4 Pipe
6265/54
83.1%
135/102
75.6%
192/163
84.9%
58.2/81.1
172/240
.681/.74
238/169
71%
72.1/84.1
214/249
.633/.576
273/181
66.3%
82.7/90
245/267
.581/.493
294/188
63.9%
89.1/93.5
264/277
.521/.427
----226/161
70.9%
1.25/2.21
.415/.324
GM LS6 Ported Stage 3 Precision Porting Alum220/802.05/1.576091/67
73.6%
164/107
65.2%
224/161
71.9%
67.9/83.2
201/246
.794/.745
270/192
71.1%
81.8/99.2
242/294
.718/.667
305/219
71.8%
92.4/113
274/335
.649/.608
298/233
78.2%
90.3/120
268/357
.528/.539
----252/182
72.3%
1.39/2.91
.415/.318
GM LS6 Ported ET Performance Alum234/-2.02/1.57
4.155
N/A66/55
83.3%
146/120
82.2%
198/163
82.3%
61.8/84.2
183/249
.712/.755
245/188
76.7%
76.4/97.1
227/288
.661/.653
282/200
70.9%
88/103
261/306
.609/.555
305/208
68.2%
95.2/107
282/318
.549/.481
----235/176
74.7%
1.30
.409/.318
GM LS6 Ported ET Performance 234 Alum234/-2.055/1.57
3.90
N/A71/57
80.3%
137/106
77.4%
203/145
71.4%
61.2/74.9
181/222
.718/.671
252/190
75.4%
76/98.1
225/291
.668/.66
285/203
71.2%
85.9/105
255/311
.605/.564
305/210
68.9%
92/108
272/321
.539/.486
----236/171
72.3%
1.30
.416/.318
GM LS6 Ported ET Performance 237 Alum237/-2.08/1.57
4.155
N/A68/56
82.4%
151/119
78.8%
207/168
81.2%
60.9/86.8
181/257
.723/.778
260/205
78.8%
76.5/106
227/314
.681/.712
301/223
74.1%
88.6/115
262/341
.631/.619
326/228
69.9%
95.9/118
284/349
.57/.528
----249/189
75.7%
1.38
.421/.318
GM LS6 Ported Texas Speed 237 Alum237/-2.04/1.57N/A-151/124
82.1%
209/160
76.6%
63.9/82.6
189/245
.745/.741
260/194
74.6%
79.5/100
236/297
.695/.674
293/217
74.1%
89.6/112
266/332
.626/.603
315/227
72.1%
96.4/117
286/347
.561/.525
----246/184
75.1%
1.33
.413/.318
GM LS7 Ported Alum CCM270/842.20/1.61
4.03
7071/60
84.5%
145/120
82.8%
222/159
71.6%
58.4/78.1
173/231
.733/.718
271/192
70.8%
71.3/94.3
211/279
.671/.65
315/207
65.7%
82.9/102
246/301
.624/.561
348/219
62.9%
91.5/108
271/319
.575/.494
352/221
62.8%
92.6/109
274/322
.498/.428
---276/186
67.6%
1.30/2.63
.446/.326
GM LS7 Ported ET Performance Alum250/-2.125/1.60
4.00
35-7273/56
76.7%
154/110
71.4%
236/166
70.3%
66.5/82.6
197/245
.807/.754
287/199
69.3%
80.9/99
240/293
.736/.678
321/214
66.7%
90.5/106
268/315
.659/.583
345/222
64.3%
97.3/110
288/327
.59/.504
----269/182
67.8%
1.38
.430/.324
GM LS7 CNC Lingenfelter Alum275/842.205/1.615
-
No Pipe
70-174/120
69%
256/164
64.1%
67/80.1
199/237
.844/.738
312/200
64.1%
81.7/97.6
242/289
.771/.675
352/222
63.1%
92.2/108
273/321
.696/.599
384/234
60.9%
101/114
298/338
.633/.526
396/242
61.1%
104/118
307/350
.559/.467
---312/197
63.1%
1.44/2.88
.447/.327
GM LS7 CNC Lingenfelter AlumN/A2.205/1.615
-
Pipe
70-174/127
73%
256/180
70.3%
67/87.9
199/260
.844/.81
312/217
69.6%
81.7/106
242/314
.771/.732
352/240
68.2%
92.2/117
273/347
.696/.648
384/260
67.7%
101/127
298/376
.633/.585
396/273
68.9%
104/133
307/395
.559/.526
---312/216
69.2%
-
.447/.327
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS Greg Good 245 AlumN/A2.125/1.60
4.03
No Pipe
N/A-148/117
79.1%
228/160
70.2%
64.3/79.6
190/236
.78/.727
301/196
65.1%
84.9/97.5
251/289
.772/.668
339/247
72.9%
95.6/123
283/364
.696/.673
354/263
74.3%
99.8/131
296/388
.605/.597
355/272
76.6%
100/135
297/401
.52/.529
---288/209
72.8%
-
.430/.324
GM LS7 8452 12 Deg West Coast SF600 Alum259/862.20/1.61
4.155
No Pipe
70-163/115
70.6%
245/168
68.6%
64.5/82.5
191/245
.809/.758
306/206
67.3%
80.5/101
239/300
.758/.697
344/218
63.4%
90.5/107
268/317
.682/.59
370/226
61.1%
97.3/111
288/329
.611/.51
336/229
68.2%
88.4/112
262/333
.476/.443
---294/194
65.9%
1.43/2.66
.446/.326
GM LS7 CNC West Coast Alum267/992.205/1.625
4.155
No Pipe
N/A81/58
71.6%
161/108
67.1%
250/163
65.2%
65.5/78.6
194/233
.824/.729
276/205
74.3%
72.3/98.8
214/293
.682/.688
357/232
65%
93.5/112
277/331
.706/.623
389/245
63%
102/118
302/350
.641/.548
380/251
66.1%
99.5/121
295/359
.537/.481
---302/201
66.4%
1.46/2.54
.447/.329
GM LS7 Ported PRC SF600 Alum285/-2.25/1.61
4.125
70-169/119
70.4%
248/179
72.2%
62.4/87.9
185/261
.801/.808
311/211
67.8%
78.2/104
232/307
.753/.714
353/234
66.3%
88.8/115
263/341
.684/.634
386/235
60.9%
97.1/115
288/342
.623/.53
407/246
60.4%
102/121
303/358
.563/.476
---312/204
65.3%
1.43
.456/.326
GM LS7 7.0l HRM Alum240/-2.10/1.60
-
No Pipe
N/A-161/113
70.2%
245/172
70.2%
70.7/85.5
210/253
.848/.781
307/200
65.1%
88.6/99.5
263/295
.797/.681
346/211
61%
99.9/105
296/311
.718/.575
374/219
58.6%
108/109
320/323
.647/.497
347/224
64.6%
100/111
297/330
.515/.436
344/228
66.3%
99.3/113
294/336
.446/.388
--303/195
64.4%
1.56
.425/.324
GM LS7 CNC SDPC283/862.20/1.617070/58
82.9%
159/111
69.8%
237/157
66.2%
62.3/77.1
185/228
.783/.709
301/199
66.1%
79.2/97.7
235/290
.746/.674
349/220
63%
91.8/108
272/320
.692/.596
378/229
60.6%
99.4/112
295/333
.624/.517
389/238
61.2%
102/117
303/346
.551/.46
---302/192
63.7%
1.37/2.77
.446/.326
GM LS7 CNC RLD Performance AlumN/A2.20/1.61N/A81/61
75.3%
172/122
70.9%
252/189
75%
66.3/92.8
196/275
.832/.853
314/236
75.2%
82.6/116
245/343
.778/.799
363/262
72.2%
95.5/129
283/381
.719/.71
376/272
72.3%
98.9/134
293/396
.621/.614
390/281
72.1%
103/138
304/409
.552/.544
393/281 @.750
103
306
.487
--323/227
-
-
.446/.326
GM LQ9 Ported Patriot Stage 2 AlumN/A2.055/1.577270/66
94.3%
138/122
88.4%
200/162
81%
60.3/83.7
179/248
.707/.75
241/203
84.2%
72.7/105
215/311
.639/.705
277/227
81.9%
83.5/117
247/347
.588/.63
304/235
77.3%
91.7/121
272/360
.538/.544
----232/190
81.8%
-
.416/.318
GM LQ9 Ported Patriot Stage 3 Alum225/832.08/1.60
4.125
7276/66
86.8%
145/122
84.1%
207/163
78.7%
60.9/81.1
181/240
.723/.74
254/205
80.7%
74.8/102
221/302
.666/.698
295/229
77.6%
86.8/114
257/337
.618/.624
320/236
73.8%
94.2/117
279/348
.559/.536
----244/191
78.2%
1.42/2.84
.421/.324
GM LQ9 / LS6 / LS2 Ported Patriot Stage 2 Alum227/702.055/1.577272/66
91.7%
140/124
88.6%
202/160
79.2%
60.9/82.6
180/245
.714/.741
246/199
80.9%
74.2/103
220/305
.652/.691
280/220
78.6%
84.4/114
250/337
.594/.611
304/229
75.3%
91.7/118
272/350
.538/.53
----234/186
79.5%
1.34/3.27
.416/.318
GM LQ9 / LS6 / LS2 Ported Patriot Stage 3 Alum227/702.08/1.607275/66
88%
147/124
84.4%
209/164
78.5%
61.5/81.6
182/242
.73/.745
255/206
80.8%
75/102
222/304
.668/.702
297/229
77.1%
87.4/114
259/337
.623/.624
320/235
73.4%
94.2/117
279/346
.559/.534
----246/192
78%
1.41/3.36
.421/.324
GM LS Ported ET Performance 245 SF600 Alum245/-2.10/1.57
4.00
No Pipe
N/A73/57
78.1%
152/114
75%
209/164
78.5%
60.3/84.7
179/251
.723/.759
266/204
76.7%
76.8/105
228/312
.69/.708
312/224
71.8%
90.1/116
267/343
.648/.622
338/231
68.3%
97.6/119
289/354
.585/.535
320/236
73.8%
92.4/122
274/361
.475/.468
---266/196
73.5%
1.38
.425/.318
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
GM LS Ported ET Performance 245 Redone I-45 E-50 SF600 Alum245/-2.125/1.55
4.03
64-149/-225/-
63.4
188
.769
281/-
79.2
235
.721
325/-
91.6
272
.667
354/-
99.8
296
.605
344/-
97
287
.504
---280
-
1.44
.430/.314
GM LS Ported ET Performance 255 SF600 Alum255/-2.10/1.57
4.00
No Pipe
N/A71/55
77.5%
147/113
76.9%
227/159
70%
65.5/82.1
194/243
.786/.736
285/213
74.7%
82.3/110
244/326
.74/.739
324/229
70.7%
93.5/118
277/350
.673/.636
349/236
67.6%
101/122
299/361
.604/.546
360/242
67.2%
104/125
308/370
.534/.48
---282/199
70.4%
1.41
.425/.318
GM LS Ported ET Performance 265 SF600 Alum265/-2.10/1.57
4.00
No Pipe
N/A73/55
75.3%
155/113
72.9%
212/159
75%
61.2/82.1
181/243
.734/.736
271/213
78.6%
78.2/110
232/326
.703/.739
323/229
70.9%
93.3/118
276/350
.671/.636
352/236
67%
102/122
301/361
.609/.546
373/242
64.9%
108/125
319/370
.553/.48
---281/199
70.7%
1.41
.425/.318
GM LS98/76 Ported Bullet Cylinder Heads AlumN/A12.00/1.575N/A82/66
80.5%
162/114
70.4%
233/151
64.8%
74.2/77.5
220/230
.847/.697
282/179
63.5%
89.8/91.9
266/272
.769/.619
319/198
62.1%
102/102
301/301
.695/.548
344/212
61.6%
109/109
324/322
.625/.489
358/223
62.3%
114/114
338/339
.558/.441
---283/180
63.4%
-
.405/.319
Chevy L92 Alum CCM260/902.16/1.59
4.03
7072/63
87.5%
148/126
85.1%
212/162
76.4%
57.9/81.6
171/242
.713/.74
264/189
71.6%
72/95.2
213/282
.666/.648
302/205
67.9%
82.4/103
244/306
.61/.562
322/214
66.5%
87.9/108
260/319
.542/.489
316/221
69.9%
86.2/111
256/330
.456/.433
---261/186
71.4%
1.24/2.46
.437/.322
Chevy L92 Livernois Motorsports AlumN/A2.16/1.59
4.125
N/A79/58
73.4%
153/114
74.5%
225/147
65.3%
61.4/74
182/219
.757/.672
276/170
61.6%
75.3/85.6
223/254
.696/.583
310/183
59%
84.6/92.2
251/273
.626/.502
332/189
56.9%
90.6/95.2
268/282
.559/.432
330/193
58.5%
90.1/97.2
267/288
.476/.378
317/196
61.8%
86.5/98.7
256/292
.40/.336
--278/170
61.3%
-
.437/.322
Chevy L92 Weingartner Racing Brez AlumN/A2.16/1.59
4.155
No Pipe
N/A66/56
84.8%
153/114
74.5%
221/160
72.4%
60.3/80.6
179/239
.744/.731
309/189
61.2%
84.3/95.2
250/282
.78/.648
330/203
61.5%
90.1/102
267/303
.666/.557
325/211
64.9%
88.7/106
263/315
.547/.482
332/214
64.5%
90.6/108
268/319
.479/.419
---278/182
65.3%
-
.437/.322
Chevy L92 Ported Head Shop AlumN/A2.16/1.59N/A-158/114
72.2%
221/160
72.4%
60.3/80.6
179/239
.744/.731
280/199
71.1%
76.4/100
226/297
.707/.682
312/226
72.4%
85.1/114
252/337
.63/.62
337/244
72.4%
92/123
272/364
.567/.558
346/250
72.3%
94.4/126
280/373
.499/.49
---276/199
72.1%
-
.437/.322
Chevy L92 West Coast Alum261/902.16/1.59
4.03
2 1/2 Pipe
69.875/64
85.3%
154/126
81.8%
225/162
72%
61.4/81.6
182/242
.757/.74
275/190
69.1%
75/95.7
222/284
.694/.651
309/205
66.3%
84.3/103
250/306
.624/.562
329/215
65.3%
89.8/108
266/321
.553/.491
310/221
71.3%
84.6/111
251/330
.447/.433
---267/187
69.9%
1.26/2.46
.437/.322
Chevy L92 West Coast Alum261/902.16/1.59
4.155
No Pipe
69.874/63
85.1%
153/121
79.1%
225/157
69.8%
61.4/79.1
182/234
.757/.718
277/176
63.5%
75.6/88.6
224/263
.699/.603
313/188
60.1%
85.4/94.7
253/281
.632/.516
336/194
57.7%
91.7/97.7
272/289
.565/.443
327/198
60.6%
89.2/99.7
264/295
.472/.388
---272/172
63.4%
1.29/2.20
.437/.322
Chevy L92 CNC West Coast Stage 2 Alum268/99-
4.03
No Pipe
7575/63
84%
160/117
73.1%
224/182
81.3%
-
275/213
77.5%
-
308/232
75.3%
-
344/243
70.6%
-
355/248
69.9%
-
---278/206
74.1%
1.32/2.51
Chevy L92 CNC West Coast Stage 2 Alum268/99-
4.155
No Pipe
7575/65
86.7%
160/116
72.5%
227/180
79.3%
-
280/219
78.2%
-
323/240
74.3%
-
354/248
70.1%
-
364/253
69.5%
-
---285/209
73.5%
1.36/2.56
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy L92 CNC West Coast Stage 3 AlumN/A2.20/-
4.155
N/A79/-161/-236/-
62.1
184
.78
293/-
77.1
228
.726
336/-
88.4
262
.666
365/-
96
285
.603
380/-
100
296
.538
---295
-
-
.446
Chevy L92 CNC West Coast Stage 3 Alum280/992.20/1.607079/57
72.2%
161/118
73.3%
237/182
76.8%
62.3/90.5
185/268
.783/.827
293/222
75.8%
77.1/110
228/327
.726/.756
336/240
71.4%
88.4/119
262/354
.666/.654
365/249
68.2%
96/124
285/367
.603/.565
375/254
67.7%
98.6/126
292/374
.531/.494
---295/211
71.6%
1.34/2.57
.446/.324
Chevy L92 CNC West Coast HRM Alum280/972.20/1.607071/60
84.5%
159/116
73%
227/174
76.7%
59.7/86.5
177/256
.75/.79
270/218
80.7%
71/108
210/321
.669/.743
320/234
73.1%
84.2/116
249/345
.634/.638
349/247
70.8%
91.8/123
272/364
.576/.561
361/253
70.1%
95/126
281/373
.511/.492
---281/207
73.7%
1.29/2.61
.446/.324
Chevy L92 Lingenfelter Alum261/892.165/1.59N/A-152/117
77%
222/155
69.8%
60.3/78.1
179/231
.745/.708
272/180
66.2%
73.9/90.7
219/269
.685/.617
306/191
62.4%
83.1/96.2
246/285
.616/.524
328/199
60.7%
89.1/100
264/297
.551/.455
304/202
66.4%
82.6/102
245/301
.437/.396
---264/174
65.9%
1.26/2.27
.438/.322
Chevy L92 CNC Competition CNC Alum266/932.165/1.5968.576/58
76.3%
161/117
72.7%
229/171
74.7%
62.2/86.1
184/255
.769/.782
282/210
74.5%
76.6/106
227/313
.71/.72
323/230
71.2%
87.7/116
260/343
.651/.631
343/240
70%
93.2/121
276/358
.576/.548
353/245
69.4%
95.9/123
284/366
.508/.48
---282/202
71.7%
1.33/2.63
.438/.322
Chevy L92 / LS3 821 Alum HRM260/902.165/1.597067/59
88.1%
147/116
78.9%
211/157
74.4%
57.3/79.1
170/234
.708/.718
259/188
72.6%
70.4/94.7
208/281
.652/.644
297/207
69.7%
80.7/104
239/309
.598/.568
312/216
69.2%
84.8/109
251/322
.524/.494
314/223
71%
85.3/112
253/333
.452/.437
---257/185
71.9%
1.21/2.48
.438/.322
Chevy L92 / L76 CNC GMPP CCM Alum280/1002.16/1.59
4.065
N/A-150/105
70%
222/140
63.1%
60.6/70.5
180/209
.747/.64
260/168
64.6%
71/84.6
210/251
.656/.576
298/190
63.8%
81.3/95.7
241/284
.602/.521
332/201
60.5%
90.6/101
268/300
.559/.459
----252/161
63.7%
1.19/2.01
.437/.322
Chevy L92 364 CNC GMPP HRM Alum279/952.165/1.597071/61
85.9%
150/110
73.3%
226/154
68.1%
61.4/77.6
182/230
.759/.704
273/184
67.4%
74.2/92.7
220/275
.687/.631
313/206
65.8%
85/104
252/307
.63/.565
341/219
64.2%
92.6/110
274/327
.572/.50
----261/175
67%
1.22/2.31
.438/.322
Chevy L92 / LS3 Lingenfelter Alum261/892.165/1.59N/A-156/120
76.9%
226/158
69.9%
61.4/79.6
182/236
.759/.722
276/183
66.3%
75/92.2
222/273
.695/.627
310/194
62.6%
84.2/97.7
250/289
.624/.532
332/202
60.8%
90.2/102
267/301
.557/.462
308/205
66.6%
83.7/103
248/306
.443/.402
---268/177
66%
1.27/2.30
.438/.322
Chevy L92 / LS3 CNC Lingenfelter Alum275/932.165/1.59
4.065
N/A-156/116
74.4%
228/160
70.2%
61.9/80.6
184/239
.765/.731
280/199
71.1%
76.1/100
225/297
.705/.682
320/218
68.1%
86.9/110
258/325
.644/.598
346/229
66.2%
94/115
278/342
.581/.523
340/235
69.1%
92.4/118
274/351
.489/.46
---278/193
69.3%
1.26/2.53
.438/.322
Chevy L92 / LS3 CNC Lingenfelter Alum275/932.165/1.59
4.125
N/A-158/116
73.4%
230/161
70%
62.5/81.1
185/240
.772/.736
282/201
71.3%
76.6/101
227/300
.71/.689
322/220
68.3%
87.5/111
259/328
.649/.603
350/231
66%
95.1/116
282/345
.587/.528
344/237
68.9%
93.4/119
277/354
.495/.464
---281/194
69.2%
1.27/2.55
.438/.322
Chevy L92 / LS3 823 CNC Lingenfelter HRM Alum271/932.165/1.597067/54
80.6%
141/112
79.4%
207/173
83.6%
56.2/87.1
167/258
.695/.791
261/217
83.1%
70.9/109
210/324
.657/.744
303/238
78.5%
82.3/120
244/355
.61/.653
341/252
73.9%
92.6/127
274/376
.572/.576
360/254
70.6%
97.8/128
290/379
.518/.498
---269/208
77.2%
1.33/2.73
.438/.322
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy L92 / LS3 Ported TEA Stage 2 Alum287/952.165/1.59
4.125
1.875 Pipe
7271/55
77.5%
155/118
76.1%
240/190
79.2%
65.2/95.7
193/284
.806/.868
302/253
83.8%
82/127
243/378
.76/.867
344/273
79.4%
93.4/137
277/407
.693/.749
360/284
78.9%
97.8/143
290/424
.604/.649
----280/224
79.8%
1.25/2.99
.438/.322
Chevy L92 / LS3 823 Ported TEA HRM Alum279/912.165/1.597070/57
81.4%
144/110
76.4%
226/153
67.7%
61.4/77.1
182/228
.759/.699
285/191
67%
77.4/96.2
229/285
.718/.655
326/219
67.2%
88.6/110
262/327
.657/.601
350/232
66.3%
95.1/117
282/346
.587/.53
365/241
66%
99.1/121
294/360
.525/.472
---283/191
67.6%
1.31/2.65
.438/.322
Chevy L92 / LS3 Ported Head Shop AlumN/A2.165/1.59N/A--221/160
72.4%
60/80.6
178/239
.742/.731
280/199
71.1%
76.1/100
225/297
.705/.682
312/226
72.4%
84.8/114
251/337
.628/.62
337/244
72.4%
91.5/123
271/364
.566/.558
346/250
72.3%
94/126
278/373
.498/.49
---299/216
72.1%
-
.438/.322
Chevy L92 / LS3 Advanced Induction SF600 Alum260/-2.165/1.59
4.03
No Pipe
N/A80/58
72.5%
152/118
77.6%
219/157
71.7%
59.5/79.1
176/234
.735/.718
261/183
70.1%
70.9/92.2
210/273
.657/.627
280/195
69.6%
76.1/98.2
225/291
.564/.535
306/202
66%
83.1/102
246/301
.514/.462
308/207
67.2%
83.7/104
248/309
.443/.405
---254/177
69.6%
1.18
.438/.322
Chevy L92 / LS3 Ported 267 Advanced Induction SF600 Alum267/-2.165/1.59
4.03
No Pipe
N/A75/55
73.3%
155/109
70.3%
233/150
64.4%
63.3/75.5
188/224
.782/.686
292/182
62.3%
79.3/91.7
235/272
.735/.624
329/204
62%
89.4/103
265/304
.663/.559
349/217
62.2%
94.8/109
281/324
.586/.496
364/227
62.4%
98.9/114
293/339
.524/.445
---287/182
63.2%
1.36
.438/.322
Chevy L92 / LS3 Ported PRC AlumN/A2.165/1.59N/A-154/117
76%
223/179
80.3%
60.6/90.2
179/267
.749/.818
282/202
71.6%
76.6/102
227/301
.71/.692
323/219
67.8%
87.7/110
260/327
.651/.601
349/232
66.5%
94.8/117
281/346
.586/.53
----266/190
71.3%
-
.438/.322
Chevy L92 / LS3 Ported LME AlumN/A2.165/1.60
4.07
No Pipe
N/A82/73
89%
157/124
79%
242/171
70.7%
65.7/85
195/252
.812/.777
292/206
70.5%
79.3/102
235/304
.735/.702
345/232
67.2%
93.7/115
278/342
.695/.632
367/239
65.1%
99.7/119
295/352
.616/.543
----281/194
69.3%
-
.438/.324
Chevy L92 / LS3 CNC RLD Performance Alum277/-2.16/1.5968-69-144/124
86.1%
224/179
79.9%
61.1/90.2
181/267
.754/.818
276/198
71.7%
75.3/99.7
223/295
.696/.679
313/223
71.2%
85.4/112
253/333
.632/.612
338/248
73.4%
92.2/125
273/370
.569/.567
347/255
73.5%
94.7/128
281/381
.50/.50
---274/205
74.7%
1.25
.437/.322
Chevy L92 364 / 716 CNC SD8760 / SD8800 Alum279/992.165/1.59
4.155
7069/46
66.7%
154/100
64.9%
222/136
61.3%
60.3/68.5
179/203
.745/.622
266/166
62.4%
72.3/83.6
214/248
.67/.569
309/189
61.2%
83.9/95.2
249/282
.622/.518
345/189
54.8%
93.7/95.2
278/282
.579/.432
358/209
58.4%
97.2/105
288/312
.515/.409
---276/165
59.8%
1.28/2.11
.438/.322
Chevy L92 Ported TEA AlumN/A2.165/1.59
4.03
Pipe
6867/53
79.1%
150/118
78.7%
226/173
76.5%
61.4/87.1
182/258
.759/.791
287/219
76.3%
78/110
231/327
.723/.751
332/247
74.4%
90.2/124
267/369
.669/.677
353/264
74.8%
95.9/133
284/394
.592/.603
368/266
72.3%
100/134
296/397
.529/.521
---286/215
75%
-
.438/.322
Chevy LS3 Darin Morgin AlumN/A2.165/1.60N/A-158/-224/-
60.8
180
.752
273/-
74.2
220
.687
305/-
82.9
245
.614
309/-
83.9
249
.519
300/-
81.5
241
.432
309/-
83.9
249
.389
316/-
85.8
254
.354
-274
-
-
.438/.324
Chevy LS3 Ported Darin Morgin I-45 T-90% AlumN/A2.165/1.60N/A-159/-229/-
62.2
184
.769
282/-
76.6
227
.71
320/-
86.9
258
.644
338/-
91.8
272
.567
343/-
93.2
276
.493
349/-
94.8
281
.439
356/-
96.7
287
.398
-297
-
-
.438/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy LS3 Ported Darin Morgan / Chad Speier I-45 E-45 Alum265/-2.165/1.60
4.06
N/A-141/111
78.7%
219/146
66.7%
59.5/72.6
176/215
.735/.663
281/175
62.3%
76.3/87
226/258
.707/.596
322/205
63.7%
87.5/102
259/302
.649/.559
349/220
63%
94.8/109
281/324
.586/.50
355/225
63.4%
96.4/112
286/332
.511/.438
367/230
62.7%
99.7/114
295/339
.462/.392
--291/187
64.5%
1.38
.438/.324
Chevy LS3 Ported Smithberg Racing AlumN/A2.165/1.59
4.07
No Pipe
N/A71/41
57.7%
151/104
68.9%
233/153
65.7%
63.3/77.1
188/228
.782/.699
295/192
65.1%
80.1/96.7
237/287
.743/.658
335/216
64.5%
91/109
270/322
.675/.592
358/227
63.4%
97.2/114
288/339
.601/.519
----274/178
65%
-
.438/.322
Chevy LS99 Ported Mike / New Era Performance AlumN/A2.165/1.60N/A-157/-233/-
63.3
188
.782
300/-
81.5
241
.755
318/-
86.4
256
.64
340/-
92.4
274
.571
345/-
93.7
278
.496
355/-
96.4
286
.447
363/-
98.6
292
.406
-301
-
-
.438/.324
Chevy LS9 West Coast AlumN/A2.16/1.60
4.155
N/A75/60
80%
156/116
74.4%
216/160
74.1%
58.9/79.6
175/236
.727/.727
265/188
70.9%
72.3/93.5
214/277
.669/.64
291/205
70.4%
79.4/102
235/302
.587/.559
280/210
75%
76.4/104
226/309
.471/.477
284/215
75.7%
77.5/107
230/317
.41/.419
---249/182
73.3%
-
.437/.324
Chevy LS9 Ported West Coast AlumN/A2.16/1.60
4.155
N/A75/55
73.3%
154/113
73.4%
223/172
77.1%
60.9/85.5
180/253
.75/.781
274/216
78.8%
74.8/107
222/318
.691/.736
318/234
73.6%
86.8/116
257/345
.642/.638
351/242
68.9%
95.8/120
284/357
.59/.55
357/246
68.9%
97.4/122
289/363
.515/.479
---280/204
72.9%
-
.437/.324
Corvette LT1 C7 Stock Bill Jones AlumN/A2.13/1.60
4.03
No Pipe
N/A73/51
69.9%
137/116
84.7%
206/146
70.9%
57.8/72.6
171/215
.703/.663
262/189
72.1%
73.5/94
218/279
.67/.644
304/202
66.4%
85.3/100
253/298
.622/.551
295/206
69.8%
82.8/102
245/304
.503/.468
302/208
68.9%
84.8/103
251/307
.442/.405
---251/178
70.8%
-
.431/.324
AFR LS1 Street SF600 Alum205/782.02/1.60
3.90
1 7/8" Pipe
66/76-140/112
80%
200/170
85%
62.4/84.6
185/251
.72/.772
251/203
80.9%
78.3/101
232/299
.677/.692
281/221
78.6%
87.7/110
260/326
.607/.602
298/230
77.2%
93/114
276/339
.536/.522
----234/187
80%
1.45/2.95
.409/.324
AFR LS1 Street SF600 Out of Box Alum205/-2.02/1.60
3.90
1 7/8" Pipe
N/A-144/116
80.6%
208/170
81.7%
64.9/84.6
192/251
.748/.772
255/206
80.8%
79.6/102
236/304
.688/.702
287/221
77%
89.6/110
265/326
.62/.602
302/232
76.8%
94.2/115
279/342
.543/.527
----239/189
79%
1.47
.409/.324
AFR LS1 Street Chamber Wall opened to 4" Alum205/782.02/1.60
4.00
1 7/8" Pipe
57-158/122
77.2%
220/170
77.3%
68.6/84.6
203/251
.791/.772
264/217
82.2%
82.4/108
244/320
.712/.739
285/232
81.4%
88.9/115
263/342
.615/.632
300/241
80.3%
93.6/120
277/355
.54/.547
----245/196
80%
1.46/3.09
.409/.324
AFR LS1 Street Chamber Work / Mild Port Work Alum205/782.02/1.60
-
1 7/8" Pipe
N/A-151/129
85.4%
220/190
86.4%
68.6/94.5
203/280
.791/.863
266/228
85.7%
83/113
246/336
.718/.777
293/242
82.6%
91.4/120
271/357
.632/.66
301/248
82.4%
93.9/123
278/365
.541/.563
----246/207
84.2%
1.47/3.18
.409/.324
AFR LS1 210 Mongoose Street V2 Alum210/842.02/1.60
3.90
1 7/8" Pipe
N/A-153/124
81%
214/178
83.2%
66.8/88.5
198/262
.77/.808
262/214
81.7%
81.8/106
242/315
.707/.729
293/237
80.9%
91.4/118
271/349
.632/.646
302/237
78.5%
94.2/118
279/349
.543/.538
----245/198
80.9%
1.44/2.82
.409/.324
AFR LS1 Street 215 SF600 Alum215/842.02/1.60
-
1 7/8" Pipe
N/A-152/119
78.3%
218/180
82.6%
68/89.5
202/265
.784/.818
264/234
88.6%
82.4/116
244/345
.712/.797
295/234
79.3%
92.1/116
273/345
.637/.638
314/245
78%
98/122
290/361
.565/.556
----249/202
81.4%
1.46/2.92
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR LS1 215 Mongoose Strip V2 Alum215/842.02/1.60
4.06
1 7/8" Pipe
N/A-154/132
85.7%
219/180
82.2%
68.3/89.5
202/265
.788/.818
264/221
83.7%
82.4/110
244/326
.712/.753
297/239
80.5%
92.7/119
275/352
.641/.651
312/246
78.8%
97.4/122
288/363
.561/.559
----249/204
81.7%
1.45/2.93
.409/.324
AFR LS1 Street 225 Small Bore Old SF600 Alum225/852.08/1.60
3.90
1 7/8" Pipe
66/76-141/116
82.3%
205/171
83.4%
60.3/85
179/252
.716/.777
252/204
81%
74.2/101
220/301
.66/.695
287/222
77.4%
84.5/110
250/327
.602/.605
310/232
74.8%
91.2/115
270/342
.542/.527
----239/189
79.1%
1.38/2.73
.421/.324
AFR LS1 Street 225 Small Bore SF600 Alum225/852.08/1.60
3.90
1 7/8" Pipe
66/76-142/118
83.1%
205/175
85.4%
60.3/87
179/258
.716/.795
254/209
82.3%
74.8/104
221/308
.666/.712
288/225
78.1%
84.8/112
251/332
.604/.613
312/237
76%
91.8/118
272/349
.545/.538
----240/193
80.3%
1.39/2.79
.421/.324
AFR LS1 Street 225 Small Bore Pray Ported Meaux Racing SF600 AlumN/A2.08/1.60
3.90
No Pipe
55-146/114
78.1%
203/156
76.8%
59.7/77.6
177/230
.709/.709
260/196
75.4%
76.5/97.5
227/289
.681/.668
306/216
70.6%
90.1/107
267/318
.641/.589
331/230
69.5%
97.4/114
289/339
.578/.522
333/237
71.2%
98/118
290/349
.499/.461
---263/192
72.8%
-
.421/.324
AFR LS1 Street 225 Large Bore SF600 Alum225/852.08/1.60
4.125
1 7/8" Pipe
66/76-150/120
80%
220/178
80.9%
64.7/88.5
192/262
.769/.808
266/220
82.7%
78.3/109
232/324
.697/.749
304/241
79.3%
89.5/120
265/355
.637/.657
320/250
78.1%
94.2/124
279/368
.559/.568
----252/202
80.1%
1.42/2.94
.421/.324
AFR LS1 230 Mongoose Small Bore V2 Alum230/852.08/1.60
3.90
1 7/8" Pipe
66/76-157/129
82.2%
224/183
81.7%
65.9/91
195/270
.783/.831
272/225
82.7%
80/112
237/332
.713/.766
311/244
78.5%
91.5/121
271/360
.652/.665
324/252
77.8%
95.4/125
283/371
.566/.572
----258/207
80.2%
1.41/2.96
.421/.324
AFR LS1 230 Mongoose Large Bore V2 Alum230/852.08/1.60
4.125
1 7/8" Pipe
66/76-158/129
81.6%
230/183
79.6%
67.7/91
201/270
.804/.831
282/225
79.8%
83/112
246/332
.739/.766
320/244
76.3%
94.2/121
279/360
.671/.665
328/252
76.8%
96.5/125
286/371
.573/.572
----264/207
78.4%
1.43/2.96
.421/.324
AFR LS1 Street 245 Large Bore SF600 Alum245/872.16/1.60
4.125
1 7/8" Pipe
64/74-156/125
80.1%
225/185
82.2%
61.4/92
182/273
.757/.84
274/225
82.1%
74.8/112
222/332
.691/.766
315/247
78.4%
86/123
255/364
.636/.673
345/260
75.4%
94.2/129
279/383
.58/.59
----263/208
79.2%
1.41/2.99
.437/.324
AFR LSX 245 Mongoose Strip Large Bore SF600 Alum245/882.16/1.60
4.125
1 7/8" Pipe
65/73-164/131
79.9%
233/185
79.4%
63.6/92
188/273
.784/.84
290/227
78.3%
79.1/113
234/335
.732/.773
332/247
74.4%
90.6/123
268/364
.67/.673
356/257
72.2%
97.2/128
288/379
.599/.584
----275/209
76.1%
1.45/2.92
.437/.324
AFR LS1 245 HRM Alum245/872.16/1.60
4.03
6468/55
80.9%
152/117
77%
225/176
78.2%
61.4/87.5
182/259
.757/.799
278/214
77%
75.9/106
225/315
.702/.729
318/230
72.3%
86.8/114
257/339
.642/.627
343/241
70.3%
93.6/120
277/355
.577/.547
341/242
71%
93.1/120
276/357
.492/.471
---276/203
73.6%
1.40/2.78
.437/.324
AFR LS1 Ported TEA Stage 3 AlumN/A-N/A68/55
80.9%
141/124
87.9%
207/187
90.3%
-
262/241
92%
-
304/268
88.2%
-
341/278
81.5%
-
346/282
81.5%
-
---267/230
86.2%
AFR LS1 Ported ET Performance Alum240/-2.08/1.57
4.00
62-7278/52
66.7%
151/105
69.5%
219/153
69.9%
64.5/79
191/234
.765/.708
270/200
74.1%
79.5/103
235/306
.708/.694
301/220
73.1%
88.6/114
262/337
.631/.611
323/230
71.2%
95.1/119
282/352
.564/.532
333/235
70.6%
98/121
290/360
.499/.466
---266/191
71.6%
1.39
.421/.318
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR LS1 Ported ET Performance Alum250/-2.10/1.57
4.10
6678/55
70.5%
154/111
72.1%
215/161
74.9%
62.1/83.2
184/246
.744/.745
276/210
76.1%
79.7/108
236/321
.716/.729
318/228
71.7%
91.8/118
272/349
.66/.633
343/236
68.8%
99/122
293/361
.594/.546
352/244
69.3%
102/126
301/373
.522/.484
345/-
99.6
295
.448
--286/198
-
1.41
.425/.318
AirWolf LS3 Ported Dr Js Performance AlumN/A2.20/1.6064-7279/52
65.8%
155/115
74.2%
231/158
68.4%
60.8/78.6
180/233
.763/.718
291/182
62.5%
76.6/90.5
227/268
.721/.62
329/220
66.9%
86.5/109
256/324
.652/.60
354/245
69.2%
93.1/122
276/361
.585/.556
375/255
68%
98.6/127
292/376
.531/.496
385/266
69.1%
101/132
300/392
.477/.453
391/273
69.8%
103/136
305/402
.431/.413
398/278
69.8%
105/138
310/410
.394/.379
323/221
68.5%
-
.446/.324
AirWolf LS7 Ported Dr Js Performance AlumN/A2.20/1.60
-
1 7/8" Pipe
64-7274/52
70.3%
158/109
69%
225/156
69.3%
59.2/77.6
175/230
.743/.709
301/201
66.8%
79.2/100
235/296
.746/.685
337/229
68%
88.7/114
263/337
.668/.624
367/245
66.8%
96.5/122
286/361
.606/.556
397/229
57.7%
104/114
309/337
.562/.446
404/270
66.8%
106/134
315/398
.50/.46
--313/206
65.7%
-
.446/.324
All PRO LS Ported Meaux Racing AlumN/A2.10/1.60N/A-151/109
72.2%
215/162
75.3%
62.1/80.6
184/239
.744/.736
267/198
74.2%
77.1/98.5
228/292
.693/.675
303/225
74.3%
87.5/112
259/332
.629/.613
324/240
74.1%
93.5/119
277/354
.561/.545
335/246
73.4%
96.7/122
287/363
.497/.479
338/248
73.4%
97.6/123
289/365
.439/.422
--276/204
73.9%
-
.425/.324
All PRO LS Alum244/882.08/1.6062/72-----------
-
-
.421/.324
All PRO LS Alum250/882.125/1.6062/72-----------
-
-
.430/.324
All PRO LSW -1 Ported West Coast Alum285/1082.20/1.60
4.155
6975/54
72%
155/109
70.3%
242/162
66.9%
63.7/80.6
189/239
.799/.736
309/213
68.9%
81.3/106
241/314
.766/.726
355/241
67.9%
93.4/120
277/355
.704/.657
382/255
66.8%
100/127
298/376
.631/.579
403/261
64.8%
106/130
314/385
.571/.508
410/262 @.750
108
320
.508
--322/207
-
1.44/2.42
.446/.324
All PRO LSW -2 310 Ported West Coast Alum310/1162.20/1.60
4.155
65-153/111
72.5%
225/170
75.6%
59.2/84.6
175/251
.743/.772
289/211
73%
76/105
225/311
.716/.719
344/235
68.3%
90.5/117
268/346
.682/.64
375/253
67.5%
98.6/126
292/373
.619/.575
398/262
65.8%
105/130
310/386
.563/.51
417/271
65%
110/135
325/399
.517/.462
423/273 @.850
111
330
.466
-328/216
-
1.36/2.34
.446/.324
All PRO LSW -2 330 Ported West Coast Alum330/1202.25/1.60
4.155
47-143/112
78.3%
212/173
81.6%
53.3/86
158/255
.685/.786
272/212
77.9%
68.4/105
203/312
.659/.722
333/237
71.2%
83.8/118
248/349
.645/.646
386/257
66.6%
97.1/128
288/379
.623/.584
419/266
63.5%
105/132
312/392
.58/.518
437/274
62.7%
110/136
326/404
.529/.467
446/280
62.8%
112/139
332/413
.48/.424
-331/226
68.4%
1.35/2.33
.456/.324
All PRO LSW LS3 -3 265 Ported West Coast Alum265/1002.165/1.57
4.03
7070/54
77.1%
160/103
64.4%
245/155
63.3%
66.6/80.1
197/237
.822/.717
301/200
66.4%
81.8/103
242/306
.758/.694
343/221
64.4%
93.2/114
276/338
.691/.614
372/239
64.2%
101/123
299/366
.624/.553
384/248
64.6%
104/128
309/380
.552/.492
---301/194
64.6%
1.45/2.48
.438/.318
All PRO LSW LS3 -3 278 Ported West Coast Alum278/1082.20/1.60
4.155
7077/54
70.1%
152/109
71.7%
241/162
67.2%
63.4/80.6
188/239
.796/.736
312/213
68.3%
82.1/106
243/314
.773/.726
357/241
67.5%
93.9/120
278/355
.708/.657
387/241
62.3%
102/120
302/355
.639/.547
405/262
64.7%
107/130
316/386
.573/.51
---309/205
66.2%
1.46/2.43
.446/.324
All PRO LSW 12 Deg Alum272/1002.15/1.6062/72-----------
-
-
.435/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
All PRO LSW 12 Deg Alum284/1002.20/1.62562/72-------390/260
66.7%
103/125
304/371
.483/.436
---
-
1.37/2.60
.446/.329
All PRO LSW LS7 Retro Ported West Coast Alum267/1082.20/1.60
4.155
6975/54
72%
157/109
69.4%
253/162
64%
66.6/80.6
197/239
.836/.736
321/213
66.4%
84.4/106
250/314
.795/.726
362/241
66.6%
95.2/120
282/355
.717/.657
390/255
65.4%
103/127
304/376
.644/.579
400/262
65.5%
105/130
312/386
.566/.51
---314/207
66%
1.50/2.43
.446/.324
All PRO LSW LS7 Ported West Coast Alum267/1082.25/1.615
4.155
7479/54
68.4%
166/109
65.7%
253/162
64%
63.6/79.1
189/234
.817/.729
323/213
65.9%
81.2/104
241/308
.782/.719
364/241
66.2%
91.5/118
271/349
.705/.651
394/255
64.7%
99.1/124
294/369
.636/.574
412/263
63.8%
104/128
307/380
.57/.507
---319/207
65%
1.54/2.44
.456/.327
All PRO LSW LS7 12 Deg Ported West Coast Alum280/1002.18/1.60
4.155
N/A73/52
71.2%
148/104
70.3%
218/156
71.6%
58.4/77.6
173/230
.727/.709
287/206
71.8%
76.9/102
228/304
.718/.702
331/227
68.6%
88.7/113
263/335
.662/.619
359/240
66.9%
96.2/119
285/354
.598/.545
380/248
65.3%
102/123
302/365
.543/.483
391/254
65%
105/126
310/374
.489/.433
--302/205
67.9%
1.40/2.54
.441/.324
All PRO LSW LS7 12 Deg Ported West Coast Alum285/1052.20/1.60
4.155
No Pipe
58/7075/54
72%
161/108
67.1%
242/162
66.9%
63.7/80.6
189/239
.799/.736
295/213
72.2%
77.6/106
230/314
.731/.726
343/241
70.3%
90.2/120
267/355
.68/.657
379/255
67.3%
99.7/127
295/376
.626/.579
401/261
65.1%
105/130
313/385
.568/.508
---304/207
68.1%
1.41/2.49
.446/.324
All PRO LSW LS7 12 Deg Ported Jones Engineering 78/135 Alum274/-2.20/1.6072-165/110
66.7%
246/144
58.5%
64.7/71.6
192/212
.813/.654
316/204
64.6%
83.1/101
246/301
.783/.695
359/227
63.2%
94.4/113
280/335
.712/.619
372/240
64.5%
97.9/119
290/354
.614/.545
377/250
66.3%
99.2/124
294/368
.534/.487
390/254
65.1%
103/126
304/374
.483/.433
--318/204
64.2%
1.42
.446/.324
All PRO LSW LS7 12 Deg Ported ET Performance AlumN/A-N/A64/47
73.4%
148/100
67.6%
228/142
62.3%
-
318/183
57.5%
-
375/214
57.1%
-
402/237
59%
-
414/250
60.4%
-
419/258
61.6%
-
422/263
62.3%
-
-341/206
60.4%
Avenger LSx CNC Alum225/752.08/1.606462/62
100%
127/129
101%
187/179
95.7%
55/89
163/264
.653/.813
240/204
85%
70.6/101
209/301
.629/.695
282/222
78.7%
83/110
246/327
.591/.605
308/233
75.6%
90.6/116
269/343
.538/.529
320/238
74.4%
94.2/118
279/351
.479/.463
324/240
74.1%
95.4/119
283/354
.425/.409
--255/206
80.8%
1.44/3.20
.421/.324
Brodix BR7 12 Deg Alum262/-2.204/1.61471-150/113
75.3%
244/158
64.8%
64/77.2
189/229
.805/.711
294/188
63.9%
77.1/91.9
228/272
.727/.635
334/208
62.3%
87.5/102
259/301
.661/.562
360/216
60%
94.4/106
280/313
.594/.486
----276/177
63.9%
1.37
.446/.327
Brodix BR7 Ported West Coast Alum265/992.205/1.615
4.155
7075/54
72%
155/110
71%
252/156
61.9%
66/76.2
196/226
.831/.702
316/202
63.9%
82.8/98.6
245/292
.781/.682
357/226
63.3%
93.5/110
277/327
.706/.61
387/242
62.5%
101/118
300/350
.638/.544
395/250
63.3%
103/122
306/362
.558/.482
---310/198
63.7%
1.49/2.53
.447/.327
Brodix BR7 Ported West Coast Alum275/992.25/1.615
4.155
7580/54
67.5%
164/110
67.1%
255/156
61.2%
64.1/76.2
190/226
.824/.702
318/202
63.5%
80/98.6
237/292
.77/.682
364/226
62.1%
91.5/110
271/327
.705/.61
394/242
61.4%
99.1/118
294/350
.636/.544
411/250
60.8%
103/122
306/362
.569/.482
---318/198
62.2%
1.49/2.53
.456/.327
Brodix STS BR7 12 Deg Alum264/-2.204/1.61471-166/119
71.7%
247/171
69.2%
64.7/83.6
192/248
.814/.77
309/208
67.3%
81/102
240/301
.764/.702
351/221
63%
92/108
273/320
.694/.597
375/229
61.1%
98.3/112
291/332
.618/.516
----290/190
65.5%
1.42
.446/.327
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix STS BR7 264 12 Deg Alum264/-2.204/1.61471-159/116
73%
240/169
70.4%
62.9/82.6
186/245
.791/.761
303/208
68.6%
79.4/102
235/301
.749/.702
343/224
65.3%
89.9/109
266/324
.679/.605
369/233
63.1%
96.7/114
287/337
.608/.525
364/240
65.9%
95.4/117
283/348
.514/.463
---296/198
66.9%
1.40
.446/.327
Brodix STS BR7 273 12 Deg I-50 E-45 Alum273/-2.25/1.61471-147/116
78.9%
233/169
72.5%
58.6/82.6
174/245
.753/.761
286/208
72.7%
71.9/102
213/301
.693/.702
344/224
65.1%
86.5/109
256/324
.667/.605
381/233
61.2%
95.8/114
284/337
.615/.525
416/240
57.7%
105/117
310/348
.576/.463
---301/198
65.9%
1.52
.456/.327
Dart PRO1 LS1 205 Alum205/852.02/1.60
4.00
62-156/109
69.9%
215/154
71.6%
67.1/76.6
199/227
.774/.699
258/187
72.5%
80.5/93
239/276
.696/.637
290/205
70.7%
90.5/102
268/302
.626/.559
-----230/164
71.3%
1.41/2.41
.409/.324
Dart PRO1 LS1 225 Alum225/852.05/1.60
4.00
62-144/109
75.7%
202/154
76.2%
61.2/76.6
181/227
.716/.699
254/187
73.6%
77/93
228/276
.675/.637
290/205
70.7%
87.9/102
260/302
.617/.559
313/214
68.4%
94.8/106
281/315
.555/.486
----241/174
72.2%
1.39/2.52
.415/.324
Dart PRO1 LS1 225 Bret Bauer Roll Clean Up Alum230/-2.05/1.60N/A-144/112
77.8%
204/151
74%
61.8/75.1
183/223
.723/.686
260/193
74.2%
78.8/96
233/284
.691/.657
297/214
72.1%
90/106
267/315
.632/.583
312/225
72.1%
94.5/112
280/332
.553/.511
320/232
72.5%
97/115
287/342
.486/.452
---256/188
73.3%
1.39
.415/.324
Dart CNC Out of Box Alum248/-2.055/1.60
4.03
No Pipe
N/A70/53
75.7%
146/105
71.9%
210/146
69.5%
63.3/72.6
188/215
.743/.663
253/184
72.7%
76.3/91.5
226/271
.671/.627
295/213
72.2%
88.9/106
264/314
.626/.58
318/227
71.4%
95.9/113
284/335
.562/.516
314/232
73.9%
94.7/115
281/342
.476/.452
315/236
74.9%
95/117
281/348
.418/.402
--264/192
72.6%
1.28
.416/.324
Dart PRO1 LS1 CNC 250 HRM Alum249/942.08/1.60
4.03
6470/54
77.1%
144/110
76.4%
216/157
72.7%
63.6/78.1
188/231
.755/.713
265/196
74%
78/97.5
231/289
.694/.668
304/225
74%
89.5/112
265/332
.637/.613
318/235
73.9%
93.6/117
277/346
.556/.534
317/240
75.7%
93.3/119
276/354
.475/.467
---261/194
74.4%
1.28/2.55
.421/.324
Dart PRO1 LS1 Ported TEA Alum240/902.08/-
4.00
N/A70/53
75.7%
144/118
81.9%
213/178
83.6%
62.7
186
.744
271/233
86%
79.8
236
.71
309/261
84.5%
90.9
269
.648
336/275
81.8%
98.9
293
.587
----255/213
83.7%
1.40/3.06
.421
Dart PRO1 LS1 Ported TEA Alum240/902.10/-
4.155
N/A69/53
76.8%
147/122
83%
221/210
95%
63.8
189
.765
278/265
95.3%
80.3
238
.722
325/292
89.8%
93.8
278
.675
354/301
85%
102
303
.613
358/306
85.5%
103
306
.531
---281/249
88.9%
1.49/3.40
.425
Edelbrock/ Lingenfelter 61969 LS1 SF600 Alum202/832.02/1.57
3.90
No Pipe
65-141/115
81.6%
200/162
81%
62.4/83.7
185/248
.72/.75
245/196
80%
76.4/101
227/300
.661/.68
282/209
74.1%
88/108
261/320
.609/.58
300/217
72.3%
93.6/112
277/332
.54/.502
----234/180
77%
1.49/2.61
.409/.318
Edelbrock/ Lingenfelter 61899 SF1020 Alum230/782.10/1.60
4.00
67-147/109
74.1%
211/161
76.3%
60.9/80.1
181/237
.73/.731
260/193
74.2%
75.1/96
222/284
.675/.657
298/214
71.8%
86/106
255/315
.619/.583
321/224
69.8%
92.7/111
275/330
.555/.509
316/227
71.8%
91.2/113
270/335
.469/.442
---259/188
72.6%
1.40/2.91
.425/.324
Edelbrock/ Lingenfelter (LPE) HRM Alum234/842.10/1.60
4.03
6463/53
84.1%
129/110
85.3%
191/160
83.8%
55.1/79.6
163/236
.661/.727
245/196
80%
70.7/97.5
210/289
.636/.668
284/213
75%
82/106
243/314
.59/.58
318/222
69.8%
91.8/110
272/327
.55/.504
305/227
74.4%
88.1/113
261/335
.452/.442
---245/188
76.6%
1.36/2.70
.425/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Edelbrock RPM XT LS1/LS2/LS6 61949 Semi-CNC SF1020 Alum212/762.02/1.576564/57
89.1%
134/107
79.9%
193/147
76.2%
60.2/75.9
178/225
.694/.68
239/180
75.3%
74.6/93
221/275
.645/.625
274/200
73%
85.5/103
253/306
.591/.555
285/210
73.7%
88.9/108
263/321
.513/.486
----225/169
75%
1.34/2.76
.409/.318
Edelbrock RPM XT LS1/LS2 61949 Semi-CNC Alum214/782.02/1.57
3.90
65-137/111
81%
199/153
76.9%
62.1/79
184/234
.716/.708
239/188
78.7%
74.6/97.1
221/288
.645/.653
276/204
73.9%
86.1/105
255/312
.596/.567
286/212
74.1%
89.2/110
264/324
.514/.491
----227/174
76.3%
1.34/2.72
.409/.318
Edelbrock LS1 4.8l / 5.3L Ported West Coast Alum200/812.00/1.57
3.78
5965/63
96.9%
132/115
87.1%
193/164
85%
61.4/84.7
182/251
.701/.759
235/192
81.7%
74.8/99.2
222/294
.64/.667
267/210
78.7%
85/108
252/321
.582/.583
285/217
76.1%
90.7/112
269/332
.518/.502
----222/180
80.8%
1.43/2.68
.405/.318
Edelbrock LS1 Ported West Coast Alum215/882.055/1.60
4.03
Pipe
6668/56
82.4%
138/121
87.7%
207/171
82.6%
62.4/85
185/252
.732/.777
257/207
80.5%
77.5/103
230/305
.682/.705
291/227
78%
87.7/113
260/335
.617/.619
307/232
75.6%
92.6/115
274/342
.543/.527
----240/192
79.8%
1.43/2.64
.416/.324
Edelbrock LS1 LS2 Ported West Coast Alum245/882.08/1.57
4.03
Pipe
7469/65
94.2%
142/119
83.8%
211/167
79.1%
62.1/86.3
184/256
.737/.773
264/210
79.5%
77.7/108
230/321
.692/.729
304/228
75%
89.5/118
265/349
.637/.633
330/236
71.5%
97.1/122
288/361
.576/.546
337/240
71.2%
99.2/124
294/367
.505/.476
---265/200
75.6%
1.38/2.73
.421/.318
Edelbrock LS1 LS2 Ported West Coast HRM Alum245/882.08/1.57
4.03
6469/54
78.3%
146/115
78.8%
203/171
84.2%
59.7/88.3
177/262
.709/.792
254/210
82.7%
74.8/108
221/321
.666/.729
300/231
77%
88.3/119
262/354
.629/.642
325/238
73.2%
95.6/123
283/364
.568/.551
324/240
74.1%
95.4/124
283/367
.485/.476
---259/201
77.6%
1.33/2.73
.421/.318
HRD Ported All Pro LS1/LS6 AlumN/A2.00/1.55N/A-155/115
74.2%
219/166
75.8%
69.7/88
207/261
.796/.778
259/204
78.8%
82.4/108
244/320
.706/.717
295/219
74.2%
93.9/116
278/344
.643/.616
-----232/176
75.9%
-
.405/.314
Mast Black Label Ported HRM Alum270/932.20/1.607074/54
73%
141/106
75.2%
229/154
67.2%
60.2/76.6
178/227
.756/.699
299/200
66.9%
78.7/99.5
233/295
.741/.681
341/232
68%
89.7/115
266/342
.676/.632
371/248
66.8%
97.6/123
289/365
.613/.563
365/261
71.5%
96/130
285/385
.517/.508
---291/200
68.8%
1.37/2.81
.446/.324
Mast Black Label Ported LS7 HRM Alum274/842.20/1.617076/65
85.5%
163/118
72.4%
245/171
69.8%
64.5/84
191/249
.809/.772
307/212
69.1%
80.8/104
239/309
.761/.718
350/229
65.4%
92.1/112
273/333
.694/.62
379/243
64.1%
99.7/119
295/354
.626/.548
395/249
63%
104/122
308/362
.559/.482
---307/204
66.4%
1.44/2.96
.446/.326
PRC LS3/L92 13 Deg PortedN/A2.165/1.6060-68-154/117
76%
221/170
76.9%
60/84.6
178/251
.742/.772
281/205
73%
76.3/102
226/302
.707/.698
325/225
69.2%
88.3/112
262/332
.655/.613
354/235
66.4%
96.2/117
285/346
.594/.534
361/243
67.3%
98.1/121
291/358
.519/.473
---283/199
70.5%
-
.438/.324
PRC LS3/L92 13 Deg Ported260/-2.185/1.6060-68-157/117
74.5%
224/170
75.9%
59.7/84.6
177/251
.745/.772
279/205
73.5%
74.4/102
220/302
.696/.698
329/225
68.4%
87.7/112
260/332
.657/.613
360/235
65.3%
96/117
284/346
.599/.534
380/243
63.9%
101/121
300/358
.542/.473
---288/199
69.1%
1.46
.442/.324
PRC LS Ported237/852.10/1.60
4.30
No Pipe
6866/57
86.4%
147/117
79.6%
225/170
75.6%
65/84.6
192/251
.779/.772
284/206
72.5%
82/102
243/304
.737/.702
325/227
69.8%
93.8/113
278/335
.675/.619
334/235
70.4%
96.4/117
286/346
.578/.534
----263/191
72.6%
1.41/2.76
.425/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
ProComp LS1 HRM Alum219/792.055/1.60
4.03
6372/57
79.2%
148/113
76.4%
203/155
76.4%
61.2/77.1
181/228
.718/.704
261/195
74.7%
78.7/97
233/287
.692/.664
301/213
70.8%
90.8/106
269/314
.639/.58
321/219
68.2%
96.8/109
287/323
.568/.497
306/224
73.2%
92.3/111
273/330
.464/.436
---257/187
72.7%
1.47/2.84
.416/.324
ProComp LS3 CNC HRM Alum279/942.20/1.607062/53
85.5%
140/116
82.9%
206/161
78.2%
54.2/80.1
161/237
.68/.731
260/194
74.6%
68.4/96.5
203/286
.644/.661
317/225
71%
83.4/112
247/332
.628/.613
350/232
66.3%
92.1/115
273/342
.578/.527
350/244
69.7%
92.1/121
273/360
.496/.475
---271/195
72.2%
1.25/2.60
.446/.324
ProComp LS3 Ported Dr Js Performance HRM Alum279/942.20/1.607065/54
83.1%
141/118
83.7%
211/163
77.3%
55.5/81.1
164/240
.697/.74
270/196
72.6%
71/97.5
210/289
.669/.668
321/225
70.1%
84.4/112
250/332
.636/.613
357/239
66.9%
93.9/119
278/352
.59/.543
359/246
68.5%
94.4/122
280/363
.508/.479
---277/198
71.5%
1.29/2.62
.446/.324
ProComp LS7 CNC HRM Alum265/842.20/1.617074/52
70.3%
158/109
69%
225/156
69.3%
59.2/76.6
175/227
.743/.704
301/201
66.8%
79.2/98.7
235/293
.746/.68
337/229
68%
88.7/112
263/333
.668/.62
367/245
66.8%
96.5/120
286/357
.606/.553
394/259
65.7%
104/127
307/377
.558/.501
---297/200
67.3%
1.49/3.08
.446/.326
Pro-Filer LSx Alum215/-2.20/1.6062--------308/-
81
240
.339
--
-
1.43
.446/.324
Pro-Filer LSx Alum215/-2.02/1.6062-141/104
73.8%
202/154
76.2%
63/76.6
187/227
.727/.699
249/192
77.1%
77.7/95.5
230/283
.672/.654
280/212
75.7%
87.4/105
259/312
.604/.578
301/227
75.4%
93.9/113
278/335
.541/.516
305/231
75.7%
95.2/115
282/340
.47/.45
313/235
75.1%
97.7/117
289/346
.422/.40
--256/194
75.7%
1.46
.409/.324
Pro-Filer LSx Alum235/-2.08/-62--------341/-
100
297
.397
--
-
1.45
.421
Pro-Filer LSx CNC Smithberg Racing Saenz S-600 Alum250/972.10/1.60
4.03
No Pipe
6270/52
74.3%
136/85
62.5%
194/122
62.9%
56/60.7
166/180
.671/.554
252/161
63.9%
72.8/80.1
216/237
.654/.548
291/201
69.1%
84/100
249/296
.604/.548
323/227
70.3%
93.3/113
276/335
.559/.516
342/240
70.2%
98.7/119
293/354
.507/.467
---256/173
67.4%
1.37/2.47
.425/.324
Pro-Filer LSx CNC Smithberg Racing Alum250/972.10/1.60
4.03
No Pipe
6268/52
76.5%
150/85
56.7%
208/122
58.7%
60.1/60.7
178/180
.72/.554
262/161
61.5%
75.6/80.1
224/237
.68/.548
312/201
64.4%
90.1/100
267/296
.648/.548
338/227
67.2%
97.6/113
289/335
.585/.516
349/240
68.8%
101/119
299/354
.518/.467
---270/173
64%
1.40/2.47
.425/.324
RHS Pro Elite CNC Gen III210/972.04/1.576274/57
77%
152/106
69.7%
219/150
68.5%
67/77.5
199/230
.78/.694
266/190
71.4%
81.4/98.1
241/291
.711/.66
301/204
67.8%
92.1/105
273/312
.643/.567
320/211
65.9%
97.9/109
290/323
.57/.488
----252/172
68.4%
1.52/2.18
.413/.318
RHS Pro Elite CNC Gen III225/972.04/1.576271/57
80.3%
153/114
74.5%
214/163
76.2%
65.5/84.2
194/249
.762/.755
276/204
73.9%
84.4/105
250/312
.737/.708
308/222
72.1%
94.2/115
279/340
.658/.617
328/231
70.4%
100/119
297/354
.584/.535
320/236
73.8%
97.9/122
290/361
.489/.468
---267/195
73.2%
1.46/2.43
.413/.318
Texas Speed 237 HRM Alum238/852.10/1.60
4.03
6472/59
81.9%
149/115
77.2%
226/176
77.9%
65.2/87.5
193/259
.782/.799
281/217
77.2%
81.1/108
240/320
.729/.739
317/234
73.8%
91.5/116
271/345
.658/.638
336/242
72%
97/120
287/357
.581/.55
351/244
69.5%
101/121
300/360
.521/.475
---277/205
74%
1.47/2.87
.425/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Texas Speed 285 CNC PRC HRM Alum285/852.25/1.617075/66
88%
167/119
71.3%
248/179
72.2%
62.4/87.9
185/261
.801/.808
311/211
67.8%
78.2/104
232/307
.753/.714
353/224
63.5%
88.8/110
263/326
.684/.607
386/235
60.9%
97.1/115
288/342
.623/.53
403/246
61%
101/121
300/358
.558/.476
---311/202
65%
1.41/2.89
.456/.326
Trick Flow 205-LS1 SF600 Alum205/-2.00/1.57564-----299/237
79.3%
95.2/122
282/360
.543/.547
-----
-
1.46
.405/.319
Trick Flow 215-LS1 TRE SF1020 AlumN/A2.04/1.57N/A70/44
62.9%
130/100
76.9%
192/162
84.4%
58.7/83.7
174/248
.684/.75
248/198
79.8%
75.9/102
225/303
.663/.687
282/210
74.5%
86.3/108
256/321
.603/.583
286/214
74.8%
87.5/111
259/328
.509/.495
284/-
86.9
257
.434
---237/177
-
-
.413/.318
Trick Flow 215-LS1 CNC TRE SF1020 AlumN/A2.04/1.57N/A80/47
58.8%
139/105
75.5%
208/167
80.3%
63.6/86.3
189/256
.741/.773
262/203
77.5%
80.2/105
238/311
.70/.705
290/219
75.5%
88.7/113
263/335
.62/.608
308/230
74.7%
94.2/119
279/352
.549/.532
318/-
97.3
288
.486
---254/185
-
-
.413/.318
Trick Flow 215-LS1 Meaux Racing Out of Box CNC TRE SF600 AlumN/A2.04/1.57
4.03
No Pipe
N/A-118/104
88.1%
193/159
82.4%
59/82.1
175/243
.688/.736
252/194
77%
77.1/100
228/297
.673/.674
296/211
71.3%
90.6/109
268/323
.633/.586
292/219
75%
89.3/113
265/335
.52/.507
293/224
76.5%
89.6/116
266/343
.447/.444
293/226
77.1%
89.6/117
266/346
.391/.392
--248/191
77%
-
.413/.318
Trick Flow 215-LS1 CNC SF600 Alum215/802.04/1.575
3.90
1 7/8" Pipe
6468/55
80.9%
142/115
81%
215/185
86%
65.8/95
195/281
.766/.854
260/230
88.5%
79.5/118
236/350
.695/.796
300/251
83.7%
91.8/129
272/382
.641/.695
320/259
80.9%
97.9/133
290/394
.57/.598
----247/208
84.1%
1.49/3.24
.413/.319
Trick Flow 215-LS1 Ported TEA Alum215/802.05/1.60
3.90
1 7/8" Pipe
6466/54
81.8%
138/118
85.5%
218/187
85.8%
66/93
196/276
.773/.849
272/231
84.9%
82.4/115
244/340
.723/.787
308/252
81.8%
93.3/125
276/371
.655/.687
324/262
80.9%
98.2/130
291/386
.574/.595
----252/210
83.3%
1.51/3.28
.415/.324
Trick Flow 220-LS1 SF600 Alum220/802.04/1.575
4.03
1 7/8" Pipe
64-----305/233
76.4%
93.3/120
276/354
.543/.538
-----
-
1.39/2.91
.413/.319
Trick Flow 220-LS2 SF600 Alum220/-2.055/1.575
4.03
1 7/8" Pipe
6567/47
70.1%
133/104
78.2%
211/167
79.1%
63.6/85.7
188/254
.746/.771
261/202
77.4%
78.7/104
233/307
.692/.699
292/222
76%
88/114
261/338
.62/.615
305/233
76.4%
92/120
272/354
.539/.538
----240/186
77.2%
1.39
.416/.319
Trick Flow 225-LS2 CNC SF600 Alum225/802.055/1.5756568/55
80.9%
142/115
81%
220/185
84.1%
66.3/95
197/281
.778/.854
279/230
82.4%
84.1/118
249/350
.74/.796
316/251
79.4%
95.3/129
282/382
.671/.695
338/259
76.6%
102/133
302/394
.598/.598
----259/208
80.3%
1.50/3.24
.416/.319
Trick Flow 225-LS2 CNC Out of Box AlumN/A2.055/1.575N/A69/56
81.2%
148/113
76.4%
219/175
79.9%
66/89.8
196/266
.774/.807
267/217
81.3%
80.5/111
239/330
.708/.751
310/229
73.9%
93.5/118
277/348
.658/.634
328/239
72.9%
98.9/123
293/363
.58/.551
----254/195
76.5%
-
.416/.319
Trick Flow 225-LS2 Ported TEA Alum225/802.055/1.606567/54
80.6%
141/118
83.7%
223/187
83.9%
67.2/93
199/276
.789/.849
279/231
82.8%
84.1/115
249/340
.74/.787
316/252
79.7%
95.3/125
282/371
.671/.687
335/262
78.2%
101/130
299/386
.592/.595
----259/210
81.1%
1.49/3.28
.416/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Trick Flow 225-LS Ported TEA Alum225/802.055/1.60
4.03
1 7/8" Pipe
6571/61
85.9%
144/120
83.3%
222/187
84.2%
66.9/93
198/276
.785/.849
279/233
83.5%
84.1/116
249/343
.74/.794
316/260
82.3%
95.3/129
282/383
.671/.709
336/274
81.5%
101/136
300/404
.594/.622
----259/215
82.8%
1.49/3.43
.416/.324
Trick Flow 230 Advanced Induction SF600 Alum230/-2.055/1.575
4.00
1 7/8" Pipe
N/A69/55
79.7%
146/108
74%
214/155
72.4%
64.5/79.6
191/236
.757/.715
274/203
74.1%
82.6/104
245/309
.727/.703
313/223
71.2%
94.4/114
280/339
.664/.617
334/244
73.1%
101/125
298/371
.591/.563
338/248
73.4%
102/127
302/377
.512/.49
---270/197
72.9%
1.47
.416/.319
Trick Flow 235-LS2 Ported TEA Alum235/802.08/1.60
4.125
1 7/8" Pipe
7068/53
77.9%
146/124
84.9%
235/199
84.7%
69.2/99
205/293
.821/.904
293/244
83.3%
86.2/121
255/360
.768/.831
329/265
80.5%
96.8/132
287/391
.69/.722
344/276
80.2%
101/137
300/407
.601/.627
----269/222
82.3%
1.46/3.45
.421/.324
Trick Flow 245-LS2 Ported TEA Alum245/852.10/1.60
4.185
1 7/8" Pipe
7069/56
81.2%
146/130
89%
237/201
84.8%
68.4/100
203/296
.82/.913
294/249
84.7%
84.9/124
252/367
.763/.848
336/269
80.1%
97/134
287/396
.698/.733
353/276
78.2%
102/137
302/407
.611/.627
----273/225
82.4%
1.44/3.25
.425/.324
Trick Flow 245-LS2 Ported TEA Nitrous Exh Alum245/852.10/1.60
4.185
1 7/8" Pipe
7069/55
79.7%
146/122
83.6%
237/199
84%
68.4/99
203/293
.82/.904
294/250
85%
84.9/124
252/368
.763/.852
336/277
82.4%
97/138
287/408
.698/.755
353/290
82.2%
102/144
302/427
.611/.659
----273/228
83.3%
1.44/3.41
.425/.324
Trick Flow 245-LS Ported TEA Out of Box Meaux Racing SF600 AlumN/A2.10/1.60
4.125
No Pipe
N/A-138/111
80.4%
223/162
72.6%
64.4/80.6
191/239
.772/.736
280/203
72.5%
80.8/101
240/299
.727/.692
314/223
71%
90.7/111
269/329
.652/.608
335/230
68.7%
96.7/114
287/339
.58/.522
318/234
73.6%
91.8/116
272/345
.472/.456
326/238
73%
94.1/118
279/351
.423/.405
--276/200
72.4%
-
.425/.324
Trick Flow 245-LS Ported TEA Short Turn Ported Meaux Racing SF600 AlumN/A2.10/1.60
4.125
No Pipe
N/A-138/111
80.4%
223/163
73.1%
64.4/81.1
191/240
.772/.74
282/205
72.7%
81.4/102
241/302
.732/.698
316/227
71.8%
91.2/113
270/335
.656/.619
341/235
68.9%
98.5/117
292/346
.59/.534
339/240
70.8%
97.9/119
290/354
.503/.467
334/242
72.5%
96.4/120
286/357
.433/.412
--282/203
72.1%
-
.425/.324
Trick Flow 265-LS2 Ported TEA Alum265/852.10/1.60
4.155
2 Pipe
6459/58
98.3%
128/129
100%
210/189
90%
60.6/94
180/279
.727/.858
281/233
82.9%
81.1/116
240/343
.729/.794
340/256
75.3%
98.2/127
291/377
.706/.698
352/267
75.9%
102/133
301/393
.609/.606
368/272
73.9%
106/135
315/401
.546/.529
377/274
72.7%
109/136
323/404
.489/.467
382/277
72.5%
110/138
327/408
.441/.419
388/279
71.9%
112/139
332/411
.403/.38
314/242
77%
1.46/3.28
.425/.324
Trick Flow 265-LS2 Ported TEA Nitrous Exh Alum265/852.10/1.60
4.155
2 Pipe
6459/55
93.2%
128/122
95.3%
210/199
94.8%
60.6/99
180/293
.727/.904
281/250
89%
81.1/124
240/368
.729/.852
340/277
81.5%
98.2/138
291/408
.706/.755
352/290
82.4%
102/144
301/427
.609/.659
368/298
81%
106/148
315/439
.546/.58
377/303
80.4%
109/151
323/447
.489/.516
382/305
79.8%
110/152
327/449
.441/.462
388/306
78.9%
112/152
332/451
.403/.417
314/261
83.2%
1.46/3.60
.425/.324
Trick Flow 235-LSX CNC SF600 Alum235/802.08/1.60
4.125
1 7/8" Pipe
7065/55
84.6%
144/124
86.1%
229/196
85.6%
67.4/97.5
200/289
.80/.89
287/242
84.3%
84.5/120
250/357
.752/.824
323/260
80.5%
95.1/129
282/383
.677/.709
340/270
79.4%
100/134
296/398
.594/.613
----265/218
82.5%
1.45/3.38
.421/.324
Trick Flow 235 CNC HRM Alum234/802.08/1.60
4.03
6467/57
85.1%
144/113
78.5%
221/172
77.8%
65/85.5
193/253
.772/.781
272/213
78.3%
80/106
237/314
.713/.726
309/230
74.4%
90.9/114
269/339
.648/.627
333/240
72.1%
98/119
290/354
.582/.545
315/244
77.5%
92.7/121
275/360
.472/.475
---266/202
76%
1.42/3.05
.421/.324
Trick Flow 255 GenX 12 Deg Alum255/872.165/1.60
4.065
1 7/8 Pipe
6971/59
83.1%
146/113
77.4%
231/171
74%
62.7/85
186/252
.775/.777
294/215
73.1%
79.9/107
237/317
.74/.732
334/240
71.9%
90.7/119
269/354
.673/.654
363/252
69.4%
98.6/125
292/371
.609/.572
382/258
67.5%
104/128
307/380
.55/.502
---292/208
71.4%
1.50/2.97
.438/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Trick Flow 255-LS3 Ported TEA SF600 Alum255/872.165/1.60
4.06
1.875 Pipe
6971/59
83.1%
140/117
83.6%
225/168
74.7%
61.1/83.6
181/248
.755/.763
288/213
74%
78.2/106
232/314
.725/.726
331/236
71.3%
89.9/117
266/348
.667/.643
361/247
68.4%
98.1/123
291/364
.606/.561
373/254
68.1%
101/126
300/374
.537/.494
---286/206
71.9%
1.46/2.92
.438/.324
Trick Flow 260-LS7 Ported TEA Alum260/872.20/1.60
4.125
2 Pipe
7071/58
81.7%
148/113
76.4%
233/168
72.1%
61.3/83.6
182/248
.77/.763
296/212
71.6%
77.9/105
231/312
.733/.722
340/237
69.7%
89.4/118
265/349
.674/.646
375/249
66.4%
98.6/124
292/367
.619/.565
393/254
64.6%
103/126
306/374
.556/.494
---298/206
69.1%
1.51/2.92
.446/.324
World Warhawk LS1X Alum235/802.08/1.6064/72-----300/219
73%
88.3/109
262/323
.524/.497
-----
-
1.28/2.74
.421/.324
World Warhawk LS1X Alum235/802.08/1.60N/A65/63
96.9%
137/119
86.9%
202/172
85.1%
59.4/85.5
176/253
.706/.781
247/194
78.5%
72.7/96.5
215/286
.647/.661
280/206
73.6%
82.4/102
244/304
.587/.561
304/211
69.4%
89.5/105
265/311
.531/.479
----234/180
77.1%
1.29/2.64
.421/.324
World Warhawk LS1 15 Deg SF600 Alum235/872.08/1.60
-
No Pipe
64/7272/63
87.5%
146/118
80.8%
209/155
74.2%
61.5/77.1
182/228
.73/.704
254/185
72.8%
74.8/92
221/273
.666/.63
282/204
72.3%
83/101
246/301
.591/.556
304/215
70.7%
89.5/107
265/317
.531/.488
313/221
70.6%
92.1/110
273/326
.469/.43
321/223
69.5%
94.5/111
280/329
.421/.38
--261/189
72.2%
1.37/2.56
.421/.324
World Warhawk LS1 15 Deg Kuntz CNC SF600 Alum255/902.10/1.60
-
No Pipe
7267/62
92.5%
137/123
89.8%
208/169
81.3%
60.1/84.1
178/249
.72/.768
268/208
77.6%
77.4/103
229/307
.696/.709
307/233
75.9%
88.6/116
263/343
.637/.635
332/246
74.1%
95.9/122
284/363
.574/.559
345/253
73.3%
99.6/126
295/373
.512/.492
347/256
73.8%
100/127
297/377
.45/.436
--278/213
76.5%
1.36/2.84
.425/.324
World Warhawk 255 CNC HRM Alum255/872.10/1.60
4.03
6463/56
88.9%
137/115
83.9%
200/165
82.5%
57.7/82.1
171/243
.692/.749
260/198
76.2%
75.1/98.5
222/292
.675/.675
297/214
72.1%
85.7/106
254/315
.617/.583
313/224
71.6%
90.4/111
268/330
.542/.509
328/233
71%
94.7/116
281/343
.486/.454
---256/192
74.9%
1.29/2.68
.425/.324
World Warhawk 12 Deg SF600 Alum285/1062.20/1.6064/7258/35
60.3%
123/66
53.7%
194/111
57.2%
51/55.2
151/164
.641/.504
256/148
57.8%
67.3/73.6
200/218
.634/.504
304/175
57.6%
80/87
237/258
.603/.477
333/193
58%
87.6/96
260/284
.55/.438
354/203
57.3%
93.1/101
276/299
.501/.395
335/211
63%
88.1/105
261/311
.415/.359
--271/158
58.3%
1.24/1.99
.446/.324
World Warhawk 12 Deg Kuntz CNC SF600 Alum296/1102.20/1.60
-
No Pipe
7276/55
72.4%
178/108
60.7%
241/160
66.4%
63.4/79.6
188/236
.796/.727
309/198
64.1%
81.3/98.5
241/292
.766/.675
357/225
63%
93.9/112
278/332
.708/.613
387/249
64.3%
102/124
302/367
.639/.565
396/264
66.7%
104/131
309/389
.561/.514
403/274
68%
106/136
314/404
.499/.467
--324/211
65.1%
1.36/2.49
.446/.324
 
 
LTx     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy LT1170/621.94/1.5058---187/139
74.3%
63.3/78.7
187/233
.525/.505
190/145
76.3%
64.3/82.1
190/243
.427/.422
-----189/142
75.3%
1.12/2.34
.393/.304
Chevy LT1170/621.94/1.505860/46
76.7%
120/94
78.3%
171/122
71.3%
57.8/69
171/205
.641/.591
197/140
71.1%
66.6/79.2
197/235
.553/.509
207/154
74.4%
70/87.1
207/258
.465/.448
201/156
77.6%
68/88.3
201/262
.376/.378
----179/133
74.3%
1.22/2.52
.393/.304
Chevy LT1 Night TrainN/A1.94/-N/A56/-106/-164/-
55.5
164
.614
205/-
69.4
205
.576
210/-
71
211
.472
209/-
70.7
209
.391
----179
-
-
.393
Chevy LT1 NPSN/A1.94/1.50
4.016
No Pipe
N/A61/50
82%
119/97
81.5%
170/126
74.1%
57.5/71.3
170/211
.637/.61
203/148
72.9%
68.7/83.8
203/248
.57/.538
209/155
74.2%
70.7/87.7
209/260
.47/.451
208/158
76%
70.4/89.4
208/265
.39/.383
----182/137
75.2%
-
.393/.304
Chevy LT1 '94 Kendrick AutoN/A1.94/1.50N/A61/48
78.7%
114/88
77.2%
163/117
71.8%
55.1/66.2
163/196
.611/.567
187/135
72.2%
63.3/76.4
187/226
.525/.491
190/144
75.8%
64.3/81.5
190/241
.427/.419
-----164/121
74%
-
.393/.304
Chevy LT1 '94 Ported Kendrick AutoN/A1.94/1.50N/A69/50
72.5%
139/101
72.7%
181/130
71.8%
61.2/73.6
181/218
.678/.63
223/159
71.3%
75.4/90
224/267
.627/.578
247/178
72.1%
83.6/101
248/298
.555/.517
-----198/142
71.9%
-
.393/.304
Chevy LT1 290 Weingartner Racing IronN/A1.94/1.50
4.125
No Pipe
N/A73/52
71.2%
142/106
74.6%
205/138
67.3%
69.4/78.1
205/231
.768/.669
237/152
64.1%
80.2/86
238/255
.666/.552
236/157
66.5%
79.8/88.8
237/263
.53/.456
239/201
84.1%
80.9/114
240/337
.448/.487
----212/151
71.2%
-
.393/.304
Chevy LT1 372 Alum CHP170/621.94/1.50
-
No Pipe
5872/52
72.2%
129/100
77.5%
180/130
72.2%
60.9/73.6
180/218
.674/.63
213/142
66.7%
72.1/80.4
214/238
.598/.516
214/149
69.6%
72.4/84.3
215/250
.481/.433
215/154
71.6%
72.7/87.1
216/258
.403/.373
----190/135
71%
1.26/2.48
.393/.304
Chevy LT1 372 Alum CHP170/621.94/1.50
-
Pipe
5872/53
73.6%
129/101
78.3%
180/136
75.6%
60.9/77
180/228
.674/.659
213/155
72.8%
72.1/87.7
214/260
.598/.563
214/165
77.1%
72.4/93.4
215/277
.481/.48
215/171
79.5%
72.7/96.8
216/287
.403/.414
----190/146
76.6%
1.26/2.76
.393/.304
Chevy LT1 374 Ported AlumN/A2.00/1.55N/A65/48
73.8%
130/89
68.5%
184/121
65.8%
58.6/64.1
174/190
.669/.567
209/148
70.8%
66.5/78.4
197/232
.57/.52
227/158
69.6%
72.3/83.7
214/248
.495/.444
240/163
67.9%
76.4/86.4
226/256
.436/.382
----198/136
68.6%
-
.405/.314
Chevy LT1 374 Ported Smithberg Racing Alum190/752.00/1.5560-----285/-
90.7
269
.518
295/-
93.9
278
.459
---290
-
1.55
.405/.314
Chevy LT1 561 Night Train AlumN/A1.94/-N/A58/-115/-170/-
57.5
170
.637
213/-
72.1
214
.598
221/-
74.8
222
.497
218/-
73.8
219
.408
----187
-
-
.393
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy LT1 561 TriPinTaZ AlumN/A1.94/1.50N/A63/46
73%
120/93
77.5%
170/121
71.2%
57.5/68.5
170/203
.637/.586
198/142
71.7%
67/80.4
198/238
.556/.516
201/150
74.6%
68/84.9
201/252
.452/.436
202/154
76.2%
68.3/87.1
202/258
.378/.373
----178/132
74.1%
-
.393/.304
Chevy LT1 561 Ported Smithberg Racing Alum190/802.00/1.56
4.03
No Pipe
5669/50
72.5%
140/109
77.9%
199/139
69.8%
63.3/72.7
188/215
.723/.648
2339/164273/183
67%
86.9/95.7
257/284
.595/.512
283/196
69.3%
90.1/103
267/304
.514/.457
----224/157
70.1%
1.49/2.45
.405/.316
Chevy LT1 643 TriPinTaZ AlumN/A1.94/1.50N/A67/47
70.1%
121/90
74.4%
170/120
70.6%
57.5/67.9
170/201
.637/.581
205/139
67.8%
69.4/78.7
205/233
.576/.505
206/147
71.4%
69.7/83.2
206/246
.463/.427
205/150
73.2%
69.4/84.9
205/252
.384/.363
----181/129
71.2%
-
.393/.304
Chevy LT1 643 '96 CHW Alum172/651.94/1.505462/52
83.9%
125/100
80%
175/130
74.3%
59.2/73.6
175/218
.656/.63
209/152
72.7%
70.7/86
209/255
.587/.552
230/161
70%
77.8/91.1
231/270
.517/.468
223/173
77.6%
75.4/97.9
224/290
.418/.419
223/179
80.3%
75.4/101
224/300
.358/.372
---198/149
75.5%
1.34/2.75
.393/.304
Chevy LT1 643 '96 Ported CHW Alum188/702.02/1.505970/64
91.4%
144/112
77.8%
199/138
69.3%
62.1/78.1
184/231
.716/.669
237/155
65.4%
74/87.7
219/260
.639/.563
262/164
62.6%
81.8/92.8
242/275
.566/.477
269/178
66.2%
83.9/101
249/298
.484/.431
265/185
69.8%
82.7/105
245/310
.409/.384
---229/155
67.7%
1.43/2.64
.409/.304
Chevy LT1 Ported Brian AlumN/A2.00/1.565366/48
72.7%
129/93
72.1%
183/130
71%
58.3/68
173/202
.665/.606
229/168
73.4%
72.9/87.9
216/260
.624/.587
262/189
72.1%
83.4/98.9
247/293
.571/.528
265/192
72.5%
84.4/100
250/298
.481/.447
----214/154
72.3%
-
.405/.316
Chevy LT1 Ported CDN Performance Stage 2 SF600 AlumN/A2.02/1.60N/A76/79
103%
150/147
98%
196/183
93.4%
61.2/91
181/270
.705/.831
227/201
88.5%
70.8/100
210/296
.613/.685
256/213
83.2%
79.9/106
237/314
.553/.58
274/220
80.3%
85.5/109
253/324
.493/.50
----221/193
87.4%
-
.409/.324
Chevy LT1 Ported TEA Stage 2 AlumN/A2.00/1.56N/A69/56
81.2%
140/119
85%
200/165
82.5%
63.7/86.3
189/256
.727/.769
244/198
81.1%
77.7/104
230/307
.665/.692
275/220
80%
87.5/115
259/341
.60/.615
279/237
84.9%
88.8/124
263/367
.507/.552
----228/188
82.5%
-
.405/.316
Chevy LT1 Ported TEA Stage 3 AlumN/A2.02/1.60N/A72/56
77.8%
148/117
79.1%
218/161
73.9%
68/80.1
202/237
.784/.731
261/204
78.2%
81.4/101
241/301
.704/.695
289/233
80.6%
90.2/116
267/343
.624/.635
294/252
85.7%
91.7/125
272/371
.529/.572
294/262
89.1%
91.7/130
272/386
.453/.51
---251/205
81.7%
-
.409/.324
Chevy LT1 Ported ET Performance Alum207/-2.00/1.55
4.03
6066/49
74.2%
135/101
74.8%
195/142
72.8%
62.1/75.3
184/223
.709/.666
235/169
71.9%
74.8/89.6
222/265
.64/.594
260/186
71.5%
82.8/98.6
245/292
.567/.523
263/200
76%
83.7/106
248/314
.478/.469
----218/160
73.3%
1.27
.405/.314
Chevy LT1 Ported No Rush AlumN/A2.00/1.55
-
No Pipe
N/A71/60
84.5%
142/109
76.8%
193/148
76.7%
61.4/78.4
182/232
.701/.694
237/179
75.5%
75.4/94.9
224/281
.646/.629
262/193
73.7%
83.4/102
247/303
.571/.543
271/198
73.1%
86.3/105
256/311
.492/.464
275/202
73.5%
87.5/107
259/317
.428/.406
---230/172
74.6%
-
.405/.314
Chevy LT1 Ported No Rush AlumN/A2.00/1.55
-
Pipe
N/A71/62
87.3%
142/114
80.3%
193/158
81.9%
61.4/83.7
182/248
.701/.741
237/191
80.6%
75.4/101
224/300
.646/.672
262/206
78.6%
83.4/109
247/323
.571/.58
271/216
79.7%
86.3/114
256/339
.492/.506
275/219
79.6%
87.5/116
259/344
.428/.44
---230/184
80%
-
.405/.314
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy LT1 Ported 190 Advanced Induction SF600 Alum190/-2.00/1.55
4.03
No Pipe
N/A70/56
80%
143/113
79%
197/149
75.6%
62.7/79
186/234
.716/.699
244/177
72.5%
77.7/93.8
230/278
.665/.622
269/189
70.3%
85.6/100
254/297
.586/.532
275/195
70.9%
87.5/103
259/306
.50/.457
276/200
72.5%
87.9/106
260/314
.43/.402
---234/171
72.9%
1.45
.405/.314
Chevy LT1 Ported 200 Advanced Induction SF600 Alum200/-2.00/1.56
4.03
No Pipe
52-5669/65
94.2%
148/116
78.4%
205/153
74.6%
65.3/80
193/237
.745/.713
247/179
72.5%
78.6/93.7
233/277
.673/.625
275/190
69.1%
87.5/99.4
259/295
.60/.531
288/196
68.1%
91.7/103
272/304
.523/.457
290/201
69.3%
92.3/105
274/312
.452/.401
---242/173
71.2%
1.45
.405/.316
Chevy LT1 Kyle Ported Blackstone AlumN/A2.02/1.60
-
Pipe
N/A74/64
86.5%
147/118
80.3%
203/167
82.3%
63.3/83.1
188/246
.73/.759
249/197
79.1%
77.7/98
230/290
.672/.671
269/214
79.6%
83.9/106
249/315
.581/.583
284/225
79.2%
88.6/112
263/332
.511/.511
287/232
80.8%
89.6/115
265/342
.443/.452
---240/192
80.1%
-
.409/.324
Chevy LT1 Ported GTP Stage 2 AlumN/A2.00/1.56N/A70/51
72.9%
122/119
97.5%
186/145
78%
59.2/75.9
175/225
.676/.675
222/176
79.3%
70.7/92.1
209/273
.605/.615
254/204
80.3%
80.9/107
240/316
.554/.57
266/217
81.6%
84.7/114
251/336
.483/.505
----210/172
82%
-
.405/.316
Chevy LT1 Ported GTP Stage 2 Flowed Alum188/-2.00/1.5648-135/106
78.5%
184/140
76.1%
58.6/73.2
174/217
.669/.652
228/164
71.9%
72.6/85.8
215/254
.621/.573
258/182
70.5%
82.1/95.2
243/282
.562/.509
267/192
71.9%
85/100
252/298
.485/.447
263/195
74.1%
83.7/102
248/302
.41/.389
---223/163
73.3%
1.42
.405/.316
Chevy LT1 Ported Meaux Racing SF600 AlumN/A2.055/1.60
4.00
No Pipe
N/A-138/115
83.3%
193/154
79.8%
58.2/76.6
172/227
.683/.699
236/182
77.1%
71.2/90.5
211/268
.626/.62
261/193
73.9%
78.7/96
233/284
.554/.526
260/201
77.3%
78.4/100
232/296
.46/.456
262/206
78.6%
79/102
234/304
.397/.401
264/-
79.6
236
.35
--231/175
-
-
.416/.324
Chevy LT4 '96 Kendrick AutoN/A2.00/1.55N/A69/53
76.8%
135/99
73.3%
184/125
67.9%
58.6/66.2
174/196
.669/.586
218/143
65.6%
69.4/75.8
206/225
.594/.503
241/158
65.6%
76.7/83.7
227/248
.525/.444
-----195/131
67.5%
-
.405/.314
Chevy LT4 '96 Ported Kendrick AutoN/A2.00/1.55N/A82/58
70.7%
149/104
69.8%
193/144
74.6%
61.4/76.3
182/226
.701/.675
232/173
74.6%
73.8/91.7
219/272
.632/.608
261/189
72.4%
83.1/100
246/297
.569/.532
-----209/153
73.1%
-
.405/.314
Chevy LT4 Alum195/-2.00/1.5556-156/121
77.6%
208/149
71.6%
66.2/79
196/234
.756/.699
243/177
72.8%
77.3/93.8
229/278
.662/.622
265/190
71.7%
84.4/101
250/298
.578/.535
257/196
76.3%
81.8/104
242/308
.467/.459
----226/167
73.8%
1.36
.405/.314
Chevy LT4 Alum CHP195/-2.00/1.55
-
No Pipe
5678/67
85.9%
147/109
74.1%
197/133
67.5%
62.7/70.5
186/209
.716/.624
230/159
69.1%
73.2/84.3
217/250
.627/.559
250/172
68.8%
79.6/91.2
236/270
.545/.484
243/177
72.8%
77.3/93.8
229/278
.441/.415
----213/150
70.3%
1.28
.405/.314
Chevy LT4 Alum CHP195/-2.00/1.55
-
Pipe
5678/67
85.9%
147/114
77.6%
197/141
71.6%
62.7/74.7
186/221
.716/.661
230/167
72.6%
73.2/88.5
217/262
.627/.587
250/180
72%
79.6/95.4
236/283
.545/.506
243/185
76.1%
77.3/98
229/290
.441/.434
----213/157
73.8%
1.28
.405/.314
Chevy LT4 Ported ET Performance AlumN/A2.00/1.55
4.03
6071/47
66.2%
134/97
72.4%
192/132
68.8%
61.1/70
181/207
.698/.619
238/165
69.3%
75.8/87.4
224/259
.649/.58
268/185
69%
85.3/98
253/290
.584/.52
277/195
70.4%
88.2/103
261/306
.503/.457
----222/155
69.8%
-
.405/.314
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy LT4 Ported No Rush AlumN/A2.00/1.55
-
No Pipe
N/A72/62
86.1%
142/108
76.1%
195/151
77.4%
62.1/80
184/237
.709/.708
239/177
74.1%
76.1/93.8
225/278
.651/.622
270/191
70.7%
85.9/101
255/300
.589/.537
281/198
70.5%
89.4/105
265/311
.511/.464
288/201
69.8%
91.7/107
272/316
.448/.404
290/204
70.3%
92.3/108
274/320
.395/.359
--244/176
72.1%
-
.405/.314
Chevy LT4 Ported PBR AlumN/A2.05/1.60N/A-167/126
75.4%
214/166
77.6%
64.8/82.6
192/245
.759/.754
258/193
74.8%
78.2/96
232/284
.686/.657
290/210
72.4%
87.9/104
260/309
.617/.572
310/218
70.3%
93.9/108
278/321
.549/.495
317/226
71.3%
96/112
285/333
.482/.44
---259/190
73.2%
-
.415/.324
Chevy LT4 Ported 21x Advanced Induction SF600 Alum52-562.00/1.56
4.03
No Pipe
N/A71/61
85.9%
144/107
74.3%
202/145
71.8%
64.3/75.9
191/225
.734/.675
250/175
70%
79.6/91.6
236/271
.681/.611
281/194
69%
89.4/101
265/301
.613/.542
296/203
68.6%
94.2/106
279/315
.538/.473
300/209
69.7%
95.5/109
283/324
.467/.417
---246/172
70.1%
-
.405/.316
AFR LT1 180 Street Old SF600 Alum180/642.02/1.60
4.06
1 3/4" Pipe
56-74-129/108
83.7%
195/156
80%
60.8/77.6
180/230
.702/.709
240/178
74.2%
74.9/88.5
222/262
.648/.606
255/190
74.5%
79.6/94.5
236/280
.55/.518
260/194
74.6%
81.1/96.5
240/286
.468/.441
----216/165
76.6%
1.44/3.03
.409/.324
AFR LT1 180 Street SF600 Alum180/642.02/1.60
4.06
1 3/4" Pipe
56-74-138/110
79.7%
198/158
79.8%
61.8/78.6
183/233
.712/.718
240/190
79.2%
74.9/94.5
222/280
.648/.647
260/207
79.6%
81.1/103
240/305
.561/.564
-----209/166
79.5%
1.44/3.23
.409/.324
AFR LT1 180 Comp Old SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe
74-144/102
70.8%
206/152
73.8%
64.3/75.6
190/224
.741/.69
245/190
77.6%
76.4/94.5
227/280
.661/.647
260/204
78.5%
81.1/101
240/301
.561/.556
268/211
78.7%
83.6/105
248/311
.482/.479
----225/172
76.5%
-
.409/.324
AFR LT1 180 Comp SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe
74-142/115
81%
203/165
81.3%
63.3/82.1
188/243
.73/.749
247/200
81%
77.1/99.5
228/295
.666/.681
270/217
80.4%
84.3/108
250/320
.583/.591
-----216/174
80.9%
-
.409/.324
AFR LT1 190 Street SF600 Alum190/642.02/1.6056-74-129/108
83.7%
195/156
80%
60.8/77.6
180/230
.702/.709
240/178
74.2%
74.9/88.5
222/262
.648/.606
260/190
73.1%
81.1/94.5
240/280
.561/.518
262/194
74%
81.8/96.5
242/286
.471/.441
----217/165
76.1%
1.38/3.03
.409/.324
AFR LT1/LT4 195 Street Old SF600 Alum195/642.02/1.60
4.06
1 3/4" Pipe
56-74-132/108
81.8%
198/156
78.8%
61.8/77.6
183/230
.712/.709
240/178
74.2%
74.9/88.5
222/262
.648/.606
260/190
73.1%
81.1/94.5
240/280
.561/.518
262/194
74%
81.8/96.5
242/286
.471/.441
----218/165
75.6%
1.34/3.03
.409/.324
AFR LT1/LT4 195 Street SF600 Alum195/642.02/1.60
4.06
1 3/4" Pipe
56-74-137/110
80.3%
196/156
79.6%
61.2/77.6
181/230
.705/.709
243/190
78.2%
75.8/94.5
225/280
.656/.647
274/207
75.5%
85.5/103
253/305
.591/.564
-----213/166
78%
1.41/3.23
.409/.324
AFR LT1/LT4 195 Comp Old SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe
74-135/110
81.5%
201/157
78.1%
62.7/78.1
186/231
.723/.713
249/180
72.3%
77.7/89.5
230/265
.672/.613
275/195
70.9%
85.8/97
254/287
.594/.531
280/208
74.3%
87.4/103
259/307
.504/.472
----228/170
74.6%
-
.409/.324
AFR LT1/LT4 195 Comp SF600 AlumN/A2.02/1.60
4.06
1 3/4" Pipe
74-140/115
82.1%
202/165
81.7%
63/82.1
187/243
.727/.749
248/200
80.6%
77.4/99.5
229/295
.669/.681
280/217
77.5%
87.4/108
259/320
.604/.591
300/225
75%
93.6/112
277/332
.54/.511
----234/184
78.8%
-
.409/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR LT4 195 Street SF600 Alum195/642.05/1.60
4.06
1 3/4" Pipe
55/65-146/119
81.5%
201/166
82.6%
60.9/82.6
180/245
.713/.754
247/197
79.8%
74.8/98
222/290
.657/.671
275/213
77.5%
83.3/106
247/314
.585/.58
-----217/174
80%
1.41/3.33
.415/.324
AFR LT4 195 Comp SF600 Alum195/642.08/1.60
4.06
1 3/4" Pipe
55/65-151/125
82.8%
211/172
81.5%
62.1/85.5
184/253
.737/.781
260/207
79.6%
76.5/103
227/305
.681/.705
293/224
76.5%
86.2/111
255/330
.614/.61
308/233
75.6%
90.6/116
269/343
.538/.529
----245/192
78.6%
1.58/3.64
.421/.324
AFR LT1/LT4 203 Race SF600 Alum203/802.08/1.60
4.125
1 7/8" Pipe
76-129/112
86.8%
188/145
77.1%
55.3/72.1
164/214
.657/.659
234/185
79.1%
68.9/92
204/273
.613/.63
263/205
77.9%
77.4/102
229/302
.551/.559
275/215
78.2%
80.9/107
240/317
.48/.488
272/220
80.9%
80/109
237/324
.407/.428
---227/180
79.5%
1.35/2.75
.421/.324
AFR LT1/LT4 210 Street SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe
76-139/110
79.1%
199/158
79.4%
58.6/78.6
174/233
.695/.718
249/192
77.1%
73.3/95.5
217/283
.652/.654
279/210
75.3%
82.1/104
243/309
.585/.572
295/220
74.6%
86.8/109
257/324
.515/.50
301/224
74.4%
88.6/111
262/330
.451/.436
---244/186
76.2%
1.43/2.80
.421/.324
AFR LT1/LT4 210 Race Old SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe
76-135/112
83%
197/145
73.6%
58/72.1
172/214
.688/.659
245/185
75.5%
72.1/92
214/273
.642/.63
273/205
75.1%
80.3/102
238/302
.572/.559
282/215
76.2%
83/107
246/317
.493/.488
285/220
77.2%
83.9/109
249/324
.427/.428
---236/180
76.4%
1.36/2.75
.421/.324
AFR LT1/LT4 210 Comp SF600 Alum210/802.08/1.60
4.125
1 7/8" Pipe
76-147/120
81.6%
206/166
80.6%
60.6/82.6
180/245
.72/.754
257/214
83.3%
75.6/106
224/315
.673/.729
290/225
77.6%
85.3/112
253/332
.608/.613
308/235
76.3%
90.6/117
269/346
.538/.534
312/240
76.9%
91.8/119
272/354
.467/.467
---253/200
78.9%
1.49/3.00
.421/.324
AFR LT4 210 Race V2 Alum210/802.08/1.60
4.06
1 3/4" Pipe
65-75-145/110
75.9%
199/158
79.4%
58.6/78.6
174/233
.695/.718
255/192
75.3%
75/95.5
222/283
.668/.654
292/210
71.9%
85.9/104
255/309
.612/.572
309/220
71.2%
90.9/109
269/324
.54/.50
----240/178
74.2%
1.47/2.75
.421/.324
AFR LT4 210 Comp V2 Alum210/802.08/1.60
4.06
1 3/4" Pipe
65-75-147/120
81.6%
201/166
82.6%
59.2/82.6
175/245
.702/.754
257/214
83.3%
75.6/106
224/315
.673/.729
296/225
76%
87.1/112
258/332
.621/.613
318/235
73.9%
93.6/117
277/346
.556/.534
----244/192
78.8%
1.51/2.94
.421/.324
AFR LT4 Eliminator #10331 NPS AlumN/A2.05/1.60
4.0157
No Pipe
5868/58
85.3%
145/112
77.2%
199/158
79.4%
60.3/78.6
179/233
.705/.718
242/186
76.9%
73.3/92.5
217/274
.643/.634
269/198
73.6%
81.5/98.5
241/292
.572/.54
266/207
77.8%
80.6/103
239/305
.471/.47
262/212
80.9%
79.4/105
235/312
.398/.413
---231/179
77.6%
-
.415/.324
AFR LT4 Ported Race Prep Alum213/652.08/1.60N/A75/52
69.3%
135/104
77%
194/148
76.3%
57.1/73.6
169/218
.678/.672
242/181
74.8%
71.2/90
211/267
.634/.617
278/201
72.3%
81.8/100
242/296
.583/.548
315/219
69.5%
92.7/109
275/323
.55/.497
----233/171
73.3%
1.48/3.37
.421/.324
AFR LT4 220 Race SF600 Alum220/802.08/1.60
4.125
1 7/8" Pipe
76-132/112
84.8%
190/145
76.3%
55.9/72.1
166/214
.664/.659
248/185
74.6%
73/92
216/273
.65/.63
280/205
73.2%
82.4/102
244/302
.587/.559
286/215
75.2%
84.2/107
249/317
.50/.488
292/220
75.3%
85.9/109
255/324
.437/.428
---238/180
75.8%
1.33/2.75
.421/.324
AFR LT4 227 Race SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
N/A-135/112
83%
192/145
75.5%
55.4/72.1
164/214
.664/.659
250/185
74%
72.2/92
214/273
.649/.63
288/205
71.2%
83.2/102
246/302
.598/.559
292/215
73.6%
84.3/107
250/317
.505/.488
295/220
74.6%
85.2/109
252/324
.438/.428
---242/180
74.5%
1.30/2.75
.425/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
AFR LT4 227 Street SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
N/A-148/114
77%
210/162
77.1%
60.6/80.6
180/239
.727/.736
259/204
78.8%
74.8/101
222/301
.672/.695
292/220
75.3%
84.3/109
250/324
.606/.60
305/229
75.1%
88.1/114
261/337
.528/.52
----243/186
76.5%
1.34/2.86
.425/.324
AFR LT4 227 Comp SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
N/A-151/120
79.5%
219/167
76.3%
63.2/83.1
187/246
.758/.759
266/214
80.5%
76.8/106
228/315
.69/.729
298/230
77.2%
86/114
255/339
.619/.627
318/238
74.8%
91.8/118
272/351
.55/.541
327/243
74.3%
94.4/121
280/358
.485/.473
---263/202
76.8%
1.44/3.04
.425/.324
AFR LT4 227 Street 60/40 V2 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
65-75-148/114
77%
210/162
77.1%
60.6/80.6
180/239
.727/.736
261/204
78.2%
75.4/101
223/301
.677/.695
296/220
74.3%
85.5/109
253/324
.615/.60
312/229
73.4%
90.1/114
267/337
.54/.52
318/237
74.5%
91.8/118
272/349
.472/.461
---258/194
75.5%
1.40/2.96
.425/.324
AFR LT4 227 Comp 60/40 V2 SF600 Alum227/802.10/1.60
4.125
1 7/8" Pipe
65-75-152/120
78.9%
212/167
78.8%
61.2/83.1
181/246
.734/.759
265/214
80.8%
76.5/106
227/315
.688/.729
300/230
76.7%
86.6/114
257/339
.623/.627
319/238
74.6%
92.1/118
273/351
.552/.541
327/243
74.3%
94.4/121
280/358
.485/.473
---263/202
77%
1.44/3.04
.425/.324
AFR LT4 Ported Race Prep Alum213/65-N/A75/52
69.3%
135/104
77%
194/148
76.3%
-
242/181
74.8%
-
278/201
72.3%
-
315/219
69.5%
-
----233/171
73.3%
1.48/3.37
AFR LT4 Ported Meaux Racing I-50 E-50 AlumN/A2.10/1.60
4.00
No Pipe
N/A-136/99
72.8%
197/166
84.3%
56.9/82.6
169/245
.682/.754
254/196
77.2%
73.3/97.5
217/289
.659/.668
292/216
74%
84.3/107
250/318
.606/.589
315/221
70.2%
90.9/110
269/326
.545/.502
319/226
70.8%
92.1/112
273/333
.473/.44
327/226
69.1%
94.4/112
280/333
.424/.385
--263/193
73.4%
-
.425/.324
AFR LT4 Ported Meaux Racing I-50 E-50 AlumN/A2.10/1.60
-
No Pipe
N/A-136/99
72.8%
197/166
84.3%
56.9/82.6
169/245
.682/.754
254/196
77.2%
73.3/97.5
217/289
.659/.668
292/216
74%
84.3/107
250/318
.606/.589
315/221
70.2%
90.9/110
269/326
.545/.502
324/232
71.6%
93.5/115
277/342
.481/.452
335/234
69.9%
96.7/116
287/345
.435/.399
--265/195
73.6%
-
.425/.324
Dart 180 LT1/LT4 Alum180/-2.02/1.60
-
No Pipe
58-139/114
82%
193/145
75.1%
60.2/72.1
178/214
.694/.659
231/164
71%
72.1/81.6
214/242
.623/.559
249/172
69.1%
77.7/85.5
230/253
.537/.469
253/174
68.8%
78.9/86.5
234/256
.455/.395
----213/154
72.2%
1.41
.409/.324
Dart 180 LT1 Advanced Induction SF600189.8/752.02/1.60
4.03
No Pipe
N/A61/48
78.7%
124/94
75.8%
176/124
70.5%
54.9/61.7
163/183
.633/.563
222/153
68.9%
69.3/76.1
205/225
.599/.521
251/171
68.1%
78.3/85
232/252
.542/.466
264/184
69.7%
82.4/91.5
244/271
.475/.418
256/192
75%
79.9/95.5
237/283
.395/.374
---216/153
71%
-
.409/.324
Dart 180 LT1 Ported Advanced Induction SF600201/-2.02/1.60
4.03
No Pipe
5869/57
82.6%
141/104
73.8%
197/141
71.6%
61.5/70.1
182/208
.709/.64
241/168
69.7%
75.2/83.6
223/248
.65/.572
277/187
67.5%
86.4/93
256/276
.598/.51
290/200
69%
90.5/99.5
268/295
.522/.454
290/205
70.7%
90.5/102
268/302
.447/.399
---239/168
70%
1.44
.409/.324
Dart 200 LT1/LT4 Alum200/-2.02/1.60
-
No Pipe
58-129/114
88.4%
185/145
78.4%
57.7/72.1
171/214
.666/.659
229/164
71.6%
71.5/81.6
212/242
.618/.559
261/172
65.9%
81.4/85.5
241/253
.563/.469
263/174
66.2%
82.1/86.5
243/256
.473/.395
----213/154
72.1%
1.32
.409/.324
Dart 215 LT1/LT4 Alum215/-2.05/1.60
-
No Pipe
58-127/114
89.8%
178/145
81.5%
53.9/72.1
160/214
.631/.659
216/164
75.9%
65.4/81.6
194/242
.574/.559
249/172
69.1%
75.4/85.5
224/253
.53/.469
268/174
64.9%
81.2/86.5
241/256
.475/.395
271/-
82.1
243
.412
---218/154
-
1.26
.415/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Edelbrock Performer LT1 61909 SF1020 Alum170/601.94/1.55
-
No Pipe
5461/52
85.2%
117/100
85.5%
174/140
80.5%
58.9/74.2
174/220
.652/.656
220/167
75.9%
74.4/88.5
221/262
.618/.587
242/184
76%
81.9/97.5
243/289
.544/.518
232/192
82.8%
78.5/102
233/301
.435/.45
----197/157
79.5%
1.42/3.20
.393/.314
Edelbrock Performer LT1 61909 Out of Box SF1020 GMHPMAlum175.5./691.94/1.55
4.03
5661/53
86.9%
121/100
82.6%
178/133
74.7%
60.2/70.5
178/209
.667/.624
220/155
70.5%
74.4/82.1
221/243
.618/.545
232/168
72.4%
78.5/89
233/264
.521/.473
228/172
75.4%
77.1/91.2
229/270
.427/.403
----196/146
74.4%
-
.393/.314
Edelbrock Performer RPM Xtreme LT4 61939 Semi-CNC SF1020 Alum195/752.02/1.57
4.00
5465/54
83.1%
119/107
89.9%
173/145
83.8%
54/74.9
160/222
.622/.671
255/181
71%
79.6/93.5
236/277
.688/.628
267/187
70%
83.3/96.6
247/286
.576/.519
270/190
70.4%
84.3/98.1
250/291
.486/.44
----217/162
74.7%
1.38/2.53
.409/.318
Patriot Alum195/702.02/1.60
4.00
64-----------
-
-
.409/.324
Pro Comp Alum190/-2.02/1.606458/52
89.7%
113/98
86.7%
159/133
83.6%
49.6/66.1
147/196
.572/.604
200/162
81%
62.4/80.6
185/239
.54/.552
228/180
78.9%
71.1/89.5
211/265
.492/.491
244/189
77.5%
76.1/94
226/279
.439/.429
248/192
77.4%
77.4/95.5
229/283
.382/.374
---199/159
80%
1.31
.409/.324
Trick Flow GenX LT1 21 Deg SF600185/-2.02/1.60
4.03
7065/54
83.1%
138/117
84.8%
202/162
80.2%
63/80.6
187/239
.727/.736
243/189
77.8%
75.8/94
225/279
.656/.644
270/197
73%
84.3/98
250/290
.583/.537
273/209
76.6%
85.2/104
252/308
.491/.475
----225/175
77.6%
1.48
.409/.324
Trick Flow GenX LT1 21 Deg SF600 Alum185/672.02/1.60
4.03
1 3/4" Pipe
5465/48
73.8%
132/111
84.1%
195/151
77.4%
60.8/75.1
180/223
.702/.686
236/182
77.1%
73.6/90.5
218/268
.637/.62
258/198
76.7%
80.5/98.5
239/292
.557/.54
260/206
79.2%
81.1/102
240/304
.468/.468
----216/170
78.4%
1.41/3.07
.409/.324
Trick Flow LT1 SF600 Alum195/722.02/1.60
4.03
1 3/4" Pipe
6251/58
113%
136/98
72.1%
191/136
71.2%
59.6/67.6
177/200
.687/.618
230/163
70.9%
71.8/81.1
213/240
.621/.555
253/177
70%
78.9/88
234/261
.546/.482
254/190
74.8%
79.3/94.5
235/280
.457/.431
----213/153
71.8%
1.30/2.64
.409/.324
Trick Flow LT1 Ported Lloyd Elliot Alum205/762.02/1.6067-140/108
77.1%
200/144
72%
62.4/71.6
185/212
.72/.654
245/176
71.8%
76.4/87.5
227/259
.661/.60
274/190
69.3%
85.5/94.5
253/280
.591/.518
282/204
72.3%
88/101
261/301
.507/.463
----228/164
72%
1.38/2.68
.409/.324
Trick Flow LT1 Ported Lloyd Elliot Alum208/-2.05/1.6067-142/109
76.8%
199/142
71.4%
60.3/70.6
179/209
.705/.645
243/178
73.3%
73.6/88.5
218/262
.646/.606
279/204
73.1%
84.5/101
250/301
.593/.556
292/217
74.3%
88.5/108
262/320
.518/.493
----231/170
73.6%
1.40
.415/.324
Trick Flow LT1 Ported 200 Advanced Induction SF600 Alum200/782.08/1.60
4.03
No Pipe
N/A70/61
87.1%
144/107
74.3%
198/145
73.2%
58.3/72.1
173/214
.692/.659
246/175
71.1%
72.4/87
215/258
.645/.596
274/194
70.8%
80.6/96.5
239/286
.574/.529
278/203
73%
81.8/101
242/299
.486/.461
279/209
74.9%
82.1/104
243/308
.418/.407
---237/172
72.8%
1.40/2.68
.421/.324
Trick Flow LT1 Ported 215 Advanced Induction SF600 Alum215/782.08/1.60
4.03
No Pipe
N/A72/65
90.3%
146/111
76%
206/149
72.3%
60.6/74.1
180/220
.72/.677
253/177
70%
74.5/88
221/261
.663/.603
285/196
68.8%
83.9/97.5
249/289
.597/.534
300/205
68.3%
88.3/102
262/302
.524/.466
304/210
69.1%
89.5/104
265/309
.455/.409
---249/175
70.1%
1.41/2.69
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Trick Flow LT1 Ported TEA Alum205/662.02/1.60
4.03
Pipe 1 3/4
6368/54
79.4%
143/117
81.8%
217/177
81.6%
67.7/88
201/261
.781/.804
263/219
83.3%
82.1/109
243/323
.71/.746
290/243
83.8%
90.5/121
268/358
.626/.662
294/257
87.4%
91.7/128
272/379
.529/.584
----241/203
83.9%
1.43/3.89
.409/.324
Trick Flow LT1 Ported TEA Alum220/662.08/1.60
4.03
Pipe 2"
N/A69/52
75.4%
144/119
82.6%
207/182
87.9%
60.9/90.5
181/268
.723/.827
255/224
87.8%
75/111
222/330
.668/.763
291/247
84.9%
85.6/123
254/364
.61/.673
310/257
82.9%
91.2/128
270/379
.542/.584
316/262
82.9%
93/130
276/386
.473/.51
---254/215
84.8%
1.44/3.97
.421/.324
 
 
4.3l v6 - Syclone / Typhoon     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Chevy Large Valve Rockville SpeedN/A2.02/1.60N/A65/51
78.5%
133/102
76.7%
163/131
80.4%
50.9/65.2
151/193
.586/.595
174/139
79.9%
54.3/69.1
161/205
.469/.474
178/141
79.2%
55.5/70.1
165/208
.384/.384
-----162/128
79.2%
-
.409/.324
Chevy Ported Large Valve Rockville SpeedN/A2.02/1.60N/A66/52
78.8%
135/112
83%
175/152
86.9%
54.6/75.6
162/224
.63/.69
197/183
92.9%
61.5/91
182/270
.532/.623
209/184
88%
65.2/91.5
193/271
.451/.501
214/-
66.8
198
.385
----186/158
-
-
.409/.324
Chevy 90 Deg LB4N/A1.94/1.50N/A----165/119
72.1%
55.8/67.3
165/200
.371/.346
------
-
-
.393/.304
Chevy 90 Deg L35 SandmanN/A1.94/1.50N/A60/-100/-143/-
48.4
143
.536
172/-
58.2
172
.483
189/-
63.9
189
.425
194/-
65.6
194
.363
201/-
68
201
.323
---167
-
-
.393/.304
Chevy 90 Deg L35 DennisN/A1.94/1.50N/A60/-100/-143/-
48.4
143
.536
172/-
58.2
172
.483
189/-
63.9
189
.425
199/-
67.3
199
.373
----161
-
-
.393/.304
Chevy 90 Deg L35 Ported DennisN/A1.94/1.60N/A60/62
103%
123/121
98.4%
170/172
101%
57.5/85.5
170/253
.637/.781
207/188
90.8%
70/93.5
207/277
.582/.64
230/195
84.8%
77.8/97
231/287
.517/.531
247/199
80.6%
83.6/99
248/293
.463/.452
----195/175
89.6%
-
.393/.324
Chevy 90 Deg L35 Shan Mild PortedN/A2.02/1.60N/A64/54
84.4%
122/102
83.6%
164/139
84.8%
51.2/69.1
152/205
.59/.631
197/166
84.3%
61.5/82.6
182/245
.532/.565
217/181
83.4%
67.7/90
201/267
.468/.493
218/185
84.9%
68/92
202/273
.392/.42
219/188
85.8%
68.3/93.5
202/277
.338/.366
---190/160
84.5%
-
.409/.324
Chevy 90 Deg VortecN/A1.94/1.50
4.00
N/A63/49
77.8%
131/106
80.9%
187/139
74.3%
63.3/78.7
187/233
.701/.673
218/155
71.1%
73.8/87.7
219/260
.612/.563
216/163
75.5%
73.1/92.2
217/273
.485/.474
217/165
76%
73.4/93.4
218/277
.406/.40
----194/146
75.1%
-
.393/.304
Chevy 90 Deg LF6 Vortec PortedN/A-N/A65/55
84.6%
131/125
95.4%
182/166
91.2%
-
228/184
80.7%
-
259/191
73.7%
-
-----200/167
83.3%
Chevy 359 / 523 18 Deg Hutter Alum244/-2.15/1.62552-147/110
74.8%
228/162
71.1%
62.8/78.1
186/231
.771/.724
282/215
76.2%
77.7/104
230/307
.715/.721
321/235
73.2%
88.4/113
262/336
.651/.631
338/243
71.9%
93.1/117
276/347
.571/.543
347/250
72%
95.6/121
283/357
.503/.479
---277/203
73.1%
1.42
.435/.329
Brodix 90 Deg V6 -8 23 Deg Alum194/-2.08/1.6067-134/110
82.1%
191/139
72.8%
56.2/69.1
167/205
.667/.631
230/155
67.4%
67.7/77.1
201/228
.603/.528
240/161
67.1%
70.6/80.1
209/237
.503/.439
-----199/141
71.1%
1.24
.421/.324
Brodix 90 Deg V6 -10 23 Deg Alum210/-2.08/1.6067-145/110
75.9%
195/139
71.3%
57.4/69.1
170/205
.681/.631
240/155
64.6%
70.6/77.1
209/228
.629/.528
253/161
63.6%
74.5/80.1
221/237
.53/.439
262/166
63.4%
77.1/82.6
228/245
.458/.377
262/168
64.1%
77.1/83.6
228/248
.392/.327
---226/150
66.2%
1.25
.421/.324
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 Average
Brodix 90 Deg V6 18 Deg Ported Kelford Cams AlumN/A2.08/1.60N/A66/63
95.5%
130/124
95.4%
193/160
82.9%
56.8/79.6
168/236
.674/.727
245/184
75.1%
72.1/91.5
214/271
.642/.627
294/198
67.3%
86.5/98.5
256/292
.616/.54
323/204
63.2%
95.1/101
282/301
.564/.463
339/207
61.1%
99.8/103
296/305
.508/.403
---254/180
70.7%
-
.421/.324
 
 
Ecotec     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises 
 
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 Average
4 cyl Ported AlumN/A35.2mm/ 30.1mmN/A------250/-
82.9
246
.492
270/175
64.8%
89.5/79.3
265/235
.472/.358
--260
-
-
.281/.240
4 cyl Ported AlumN/A35.2mm/ 31.1mmN/A------250/-
82.9
246
.492
270/207
76.7%
89.5/87.9
265/260
.472/.41
--260
-
-
.281/.248
2.0L LSJ M2 Race Systems AlumN/A35.2mm/ 30.1mm
3.575
N/A--155/127
81.9%
51.4/57.6
152/171
.61/.584
192/139
72.4%
63.6/63
189/187
.604/.511
224/144
64.3%
74.3/65.3
220/193
.587/.442
243/146
60.1%
80.6/66.2
239/196
.546/.384
253/148
58.5%
83.9/67.1
248/199
.498/.34
258/149
57.8%
85.5/67.5
253/200
.451/.305
261/149
57.1%
86.5/67.5
256/200
.411/.274
-227/143
63.2%
-
.281/.240
2.0L LSJ CNC M2 Race Systems AlumN/A36.1mm/ 31.1mm
3.575
5186/86
100%
126/126
100%
166/151
91%
52.3/64.1
155/190
.637/.672
201/173
86.1%
63.3/73.5
188/218
.617/.616
235/187
79.6%
74.1/79.4
219/235
.601/.555
263/194
73.8%
82.9/82.4
246/244
.576/.493
278/199
71.6%
87.6/84.5
260/250
.533/.443
292/203
69.5%
92/86.2
273/255
.498/.402
298/206
69.1%
93.9/87.5
278/259
.457/.367
303/208
68.6%
95.5/88.3
283/262
.423/.337
240/183
76.2%
-
.288/.248
2.2 Patriot CNC Stage II Alum173/751.42/1.2255381/7
8.69%
121/109
90.1%
160/138
86.3%
50.5/58.5
150/173
.614/.614
190/160
84.2%
60/67.9
178/201
.583/.57
217/174
80.2%
68.5/73.8
203/219
.555/.516
238/181
76.1%
75.1/76.8
223/228
.522/.46
264/187
70.8%
83.4/79.3
247/235
.507/.416
266/189
71.1%
84/80.2
249/238
.454/.374
--208/163
78.2%
1.54/2.52
.288/.248
Ported Shaver SF1020 Alum181/7835.2mm/ 30.1mmN/A113/116
102%
148/151
102%
181/176
97.2%
60/79.8
178/236
.712/.81
214/190
88.8%
70.9/86.1
210/255
.673/.699
242/199
82.2%
80.2/90.2
238/267
.635/.61
258/204
79.1%
85.5/92.5
253/274
.58/.536
268/206
76.9%
88.8/93.4
263/277
.527/.474
-/208--219/188
85.9%
1.48/2.64
.281/.240


Chevy_Big_Block     COPYRIGHT © 2000-2014 Stan Weiss  — World Wide Enterprises
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Chevy 156 Peanut Iron CHP195/-2.06/1.72
-
No Pipe
11554/35
64.8%
123/84
68.3%
184/117
63.6%
55.2/50.4
164/149
.649/.494
222/141
63.5%
66.6/60.7
197/180
.587/.447
226/156
69%
67.8/67.1
201/199
.478/.395
226/160
70.8%
67.8/68.9
201/204
.399/.338
227/162
71.4%
68.1/69.7
202/207
.343/.293
------201/137
67.9%
1.16
.417/.348
Chevy 236 Peanut Iron CHP208/1122.06/1.72
-
No Pipe
12056/44
78.6%
125/87
69.6%
183/111
60.7%
54.9/47.8
163/142
.646/.469
215/130
60.5%
64.5/55.9
191/166
.569/.412
233/144
61.8%
69.9/62
207/184
.493/.365
235/150
63.8%
70.5/64.6
209/191
.415/.317
235/155
66%
70.5/66.7
209/198
.355/.281
------204/130
63.4%
1.13/1.38
.417/.348
Chevy 236 Peanut Iron CCM208/1122.06/1.72
-
Pipe
12056/44
78.6%
125/90
72%
183/117
63.9%
54.9/50.4
163/149
.646/.494
215/139
64.7%
64.5/59.8
191/177
.569/.44
233/158
67.8%
69.9/68
207/201
.493/.401
235/166
70.6%
70.5/71.4
209/212
.415/.351
235/172
73.2%
70.5/74
209/219
.355/.311
------204/140
68.7%
1.13/1.54
.417/.348
Chevy 360 Small Oval Ported BH Performance IronN/AN/A
-
No Pipe
N/A75/68
90.7%
160/111
69.4%
202/143
70.8%
-
230/165
71.7%
-
247/178
72.1%
-
256/192
75%
-
255/199
78%
-
------225/165
73.2%
Chevy Vortec L29 '97-99 Iron230/-2.070/1.729963/49
77.8%
121/91
75.2%
165/120
72.7%
49/51.6
145/153
.579/.507
198/133
67.2%
58.8/57.2
174/170
.521/.421
226/140
61.9%
67.2/60.3
199/179
.476/.355
242/142
58.7%
71.9/61.1
213/181
.425/.30
-------190/125
65.8%
1.05
.419/.348
Chevy Oval Port Iron256/1142.06/1.72N/A-----272/189
69.5%
81.6/81.3
242/241
.48/.399
--------
-
1.06/1.66
.417/.348
Chevy 049 Oval Port Iron253/1152.06/1.72N/A------268-260/177
67%
79.2/76.2
235/226
.399/.321
-------
-
1.04/1.54
.417/.348
Chevy 049 Oval Port SF600 CHP Iron253/1162.06/1.72
-
Pipe
12259/52
88.1%
124/98
79%
188/128
68.1%
56.4/55.1
167/163
.663/.541
232/152
65.5%
69.6/65.4
206/194
.614/.482
250/177
70.8%
75/76.2
222/226
.529/.449
264/187
70.8%
79.2/80.5
235/238
.466/.395
264/192
72.7%
79.2/82.6
235/245
.399/.348
265/192
72.5%
79.5/82.6
236/245
.351/.304
-----227/161
71%
1.05/1.66
.417/.348
Chevy 049 Oval Ported BH Performance IronN/A2.19/1.88
-
No Pipe
N/A68-77/62
85.5%
146-158/112
73.7%
215-221/149
68.3%
57.9/53.7
171/159
.723/.576
265-260/167
63.6%
69.7/60.2
206/178
.653/.484
301-280/181
62.3%
77.1/65.2
229/193
.578/.42
303-293/194
65.1%
79.1/69.9
234/207
.494/.375
296-294/201
68.1%
78.3/72.4
232/215
.42/.333
------253/167
66.2%
-
.443/.381
Chevy 049 Oval Ported BH Performance IronN/A2.19/1.88
-
Pipe
N/A68-77/67
92.4%
146-158/147
96.7%
215-221/193
88.5%
57.9/69.5
171/206
.723/.746
265-260/227
86.5%
69.7/81.8
206/242
.653/.658
301-280/245
84.3%
77.1/88.3
229/262
.578/.568
303-293/249
83.6%
79.1/89.7
234/266
.494/.481
296-294/251
85.1%
78.3/90.4
232/268
.42/.416
------253/219
86.5%
-
.443/.381
Chevy 049 Oval Gamrace IronN/A2.07/1.72
4.30
No Pipe
N/A--175/128
73.1%
52/55.1
154/163
.614/.541
218/140
64.2%
64.8/60.3
192/179
.574/.444
236/149
63.1%
70.1/64.1
208/190
.497/.378
251/153
61%
74.6/65.8
221/195
.441/.323
255/154
60.4%
75.8/66.3
225/196
.384/.279
------227/145
63.8%
-
.419/.348
Chevy 049 Oval Ported Stage 1 Gamrace Iron260/-2.19/1.88
4.30
No Pipe
N/A--205/142
69.3%
54.4/51.2
161/152
.68/.549
265/169
63.8%
70.4/60.9
208/180
.66/.49
302/192
63.6%
80.2/69.2
238/205
.601/.445
302/209
69.2%
80.2/75.3
238/223
.501/.404
297/225
75.8%
78.8/81.1
234/240
.422/.373
------274/187
68.3%
1.16
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Chevy 049 Oval Ported Dr Js Performance IronN/A2.25/1.94
4.50
2" Pipe
N/A76/68
89.5%
152/134
88.2%
228/162
71.1%
57.3/54.8
170/162
.736/.607
271/214
79%
68.2/72.4
202/215
.656/.601
315/242
76.8%
79.2/81.9
235/243
.61/.544
341/261
76.5%
85.8/88.3
254/262
.551/.489
348/289
83%
87.5/97.8
259/290
.482/.464
------276/217
78.7%
-
.456/.393
Chevy 049 Oval Ported sheetmetal IronN/A2.19/1.88
4.25
No Pipe
N/A-142/110
77.5%
204/138
67.6%
54.2/49.7
160/147
.677/.533
249/166
66.7%
66.1/59.8
196/177
.62/.481
288/190
66%
76.5/68.4
227/203
.573/.441
310/200
64.5%
82.3/72
244/213
.514/.387
-------239/161
67.4%
-
.443/.381
Chevy 063 Oval Weingartner Racing IronN/A2.06/1.74
4.31
No Pipe
N/A65-59/45
72.6%
114-106/86
78.2%
178-173/115
65.5%
52.7/48.4
156/143
.619/.48
234-215/137
61%
67.4/57.6
200/171
.594/.429
248-229/153
64.2%
71.6/64.3
212/191
.505/.383
260-247/166
65.5%
76.1/69.8
225/207
.447/.347
273-255/175
66.3%
79.2/73.6
235/218
.399/.313
270-256/180
68.4%
78.9/75.7
234/224
.348/.282
-----218/145
66.2%
-
.417/.352
Chevy 063 '69 Oval Chris Straub IronN/A2.07/1.72
4.50
N/A-117/97
82.9%
180/123
68.3%
53.5/52.9
158/157
.632/.52
228/145
63.6%
67.7/62.4
201/185
.60/.459
248/164
66.1%
73.7/70.6
218/209
.522/.416
265/176
66.4%
78.7/75.7
233/224
.465/.372
270/183
67.8%
80.2/78.8
238/233
.406/.331
------218/148
67.9%
-
.419/.348
Chevy 063 '69 Oval Chris Straub IronN/A2.19/1.88
4.50
N/A-138-132/96
71.1%
202-198/123
61.5%
53.1/44.3
157/131
.664/.475
243-239/153
63.5%
64/55.1
190/163
.60/.444
272-271/175
64.5%
72.1/63
214/187
.541/.406
295-291/196
66.9%
77.8/70.6
230/209
.486/.379
293-290/215
73.8%
77.4/77.5
229/229
.415/.356
------239/160
66.9%
-
.443/.381
Chevy 063 '69 Oval Chris Straub Ported Foxwell Motorsports IronN/A2.19/1.80
4.50
2 1/4" Pipe
N/A-156-153/116
75.1%
216-215/150
69.6%
57.2/58.9
170/175
.715/.606
265-260/174
66.3%
69.7/68.4
206/203
.653/.527
307-290/200
67%
79.2/78.6
235/233
.594/.484
333-305/220
69%
84.7/86.5
251/256
.529/.444
327-310/242
76%
84.6/95.1
251/282
.453/.419
------261/184
70.3%
-
.443/.365
Chevy 3931063 Oval Dr Js Performance IronN/A2.06/1.74
-
Pipe
N/A65/55
84.6%
117/97
82.9%
180/123
68.3%
54/51.7
160/153
.635/.514
228/145
63.6%
68.4/61
203/181
.603/.454
248/164
66.1%
74.4/69
220/204
.525/.411
265/176
66.4%
79.5/74
236/219
.467/.368
270/183
67.8%
81/77
240/228
.408/.328
------218/148
67.9%
-
.417/.352
Chevy 3931063 Oval Ported Dr Js Performance IronN/A2.19/1.88
-
Pipe
N/A75/74
98.7%
150/134
89.3%
219/162
74%
58.1/58.4
172/173
.727/.626
266/206
77.4%
70.6/74.2
209/220
.662/.597
304/232
76.3%
80.7/83.6
239/248
.605/.538
321/249
77.6%
85.2/89.7
252/266
.533/.481
327/260
79.5%
86.8/93.7
257/278
.465/.431
------265/207
78.3%
-
.443/.381
Chevy 088 Ported Chad Speier SF600 IronN/A2.30/1.88
4.50
No Pipe
N/A-156-157/132
84.3%
232-229/163
70.7%
55.5/58.7
164/174
.728/.63
286-278/188
66.7%
67.9/67.7
201/201
.668/.545
328-314/207
64.5%
77.3/74.6
229/221
.609/.48
363-335/220
63%
84/79.3
249/235
.551/.425
380-353/231
63%
88.2/83.2
261/247
.496/.383
382-365/240
64.3%
89.9/86.5
266/256
.443/.348
385-371/248
65.6%
91/89.3
270/265
.398/.32
387-377/251
65.7%
91.9/90.4
272/268
.362/.291
---315/209
66.2%
-
.466/.381
Chevy 290 Oval Port Iron CHP253/1122.06/1.72
-
No Pipe
10560/47
78.3%
122/88
72.1%
172/113
65.7%
51.6/48.6
153/144
.607/.477
214/133
62.1%
64.2/57.2
190/170
.566/.421
244/152
62.3%
73.2/65.4
217/194
.516/.385
257/161
62.6%
77.1/69.3
228/205
.453/.34
260/168
64.6%
78/72.3
231/214
.393/.304
263/171
65%
78.9/73.6
234/218
.348/.271
-----219/141
64.4%
1.04/1.53
.417/.348
Chevy 290 Oval Port Iron CHP253/1122.06/1.72
-
Pipe
10560/47
78.3%
122/90
73.8%
172/118
68.6%
51.6/50.8
153/150
.607/.499
214/138
64.5%
64.2/59.4
190/176
.566/.437
244/160
65.6%
73.2/68.9
217/204
.516/.406
257/174
67.7%
77.1/74.9
228/222
.453/.368
260/184
70.8%
78/79.2
231/235
.393/.333
263/188
71.5%
78.9/80.9
234/240
.348/.298
-----219/150
68.7%
1.04/1.68
.417/.348
Chevy 290 Oval Port Ported Ron Miller SF120 IronN/A2.19/1.88
4.50
No Pipe
98.2-151-152/130
85.8%
215-162/157
83.3%
50/56.6
148/168
.626/.607
263-259/191
73.2%
69.3/68.8
205/204
.65/.554
288-275/215
76.4%
74.7/77.5
221/229
.56/.499
312-293/240
79.3%
80.3/86.5
238/256
.502/.464
326-291/243
78.8%
81.9/87.5
243/259
.439/.403
------249/196
78.7%
-
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Chevy 390 Oval NPS Stock IronN/A2.065/1.72
4.25
No Pipe
N/A69/46
66.7%
116/89
76.7%
180/114
63.3%
53.7/49.1
159/145
.633/.482
216/136
63%
64.5/58.5
191/173
.57/.431
236/155
65.7%
70.5/66.7
209/198
.498/.393
248/171
69%
74/73.6
219/218
.436/.361
260/180
69.2%
77.6/77.5
230/230
.392/.326
------209/141
67.3%
-
.418/.348
Chevy 390 Oval Pace Performance Alum290/1102.25/1.8811071/58
81.7%
138/119
86.2%
193/145
75.1%
48.5/52.2
144/155
.623/.561
233/168
72.1%
58.6/60.5
174/179
.564/.487
272/189
69.5%
68.4/68.1
203/202
.527/.438
299/202
67.6%
75.2/72.8
223/216
.483/.39
318/210
66%
80/75.7
237/224
.44/.348
327/230
70.3%
82.2/82.9
244/245
.396/.333
-----254/180
71%
1.13/2.09
.456/.381
Chevy 390 Oval SF600 Alum290/1102.25/1.88
4.50
1 7/8" Pipe
11074/71
95.9%
143/126
88.1%
207/158
76.3%
52.1/56.9
154/169
.669/.611
250/178
71.2%
62.9/64.1
186/190
.606/.516
284/200
70.4%
71.4/72
212/213
.55/.464
309/218
70.6%
77.7/78.5
230/233
.499/.421
322/232
72%
81/83.6
240/248
.446/.384
------253/185
73.4%
1.11/2.11
.456/.381
Chevy 390 Oval Ported SF600 AlumN/A2.25/1.88
4.50
1 7/8" Pipe
11285/73
85.9%
161/141
87.6%
230/175
76.1%
57.8/63
171/187
.743/.676
283/208
73.5%
71.2/74.9
211/222
.686/.603
332/234
70.5%
83.5/84.3
247/250
.643/.543
354/257
72.6%
89/92.6
264/274
.572/.497
361/274
75.9%
90.8/98.7
269/292
.50/.454
363/287
79.1%
91.3/103
271/306
.44/.416
-----298/225
75.6%
-
.456/.381
Chevy 392 / 399 Oval Alum290/1102.19/1.88110--------------
-
-
.443/.381
Chevy 702 Oval Port Iron CHP253/-2.06/1.72
-
Pipe
10157/46
80.7%
121/89
73.6%
179/115
64.2%
53.7/49.5
159/147
.631/.486
214/135
63.1%
64.2/58.1
190/172
.566/.428
237/152
64.1%
71.1/65.4
211/194
.502/.385
254/173
68.1%
76.2/74.5
226/221
.448/.365
260/183
70.4%
78/78.8
231/233
.393/.331
260/188
72.3%
78/80.9
231/240
.344/.298
-----218/148
67.9%
1.03
.417/.348
Chevy 702 Oval Weingartner Ported Pocket IronN/A2.19/1.88
4.50
N/A82/64
78%
146/104
71.2%
232/127
54.7%
61.6/45.8
182/136
.77/.491
274/154
56.2%
72.7/55.5
216/164
.682/.446
295/180
61%
78.3/64.8
232/192
.587/.417
311/204
65.6%
82.6/73.5
245/218
.516/.394
306/215
70.3%
81.2/77.5
241/229
.435/.356
292/229
78.4%
77.5/82.5
230/244
.363/.332
-----265/173
65.4%
-
.443/.381
Chevy 702 Oval Ported I-33 E-33 Back Cut Weingartner Racing BrezN/A2.19/1.88
4.31
No Pipe
N/A-180/121
67.2%
247/146
59.1%
65.6/52.6
194/156
.82/.564
283/173
61.1%
75.1/62.3
223/185
.704/.502
307/197
64.2%
81.5/71
241/210
.611/.457
314/211
67.2%
83.4/76
247/225
.521/.408
314/223
71%
83.4/80.3
247/238
.447/.369
------274/179
65.1%
-
.443/.381
Chevy 772 Oval Short Runner Weingartner RacingN/A2.19/1.88
4.50
No Pipe
N/A63/56
88.9%
157/106
67.5%
215/139
64.7%
57.1/50.1
169/148
.713/.537
259/165
63.7%
68.8/59.4
204/176
.645/.478
251/180
71.7%
66.6/64.8
197/192
.50/.417
268/184
68.7%
71.1/66.3
211/196
.445/.356
274/187
68.2%
72.7/67.4
216/200
.39/.31
275/188
68.4%
73/67.7
216/201
.342/.273
-----243/164
67.6%
-
.443/.381
Chevy 781 Oval Bill Jones IronN/A2.06/1.72
-
No Pipe
N/A69/57
82.6%
142/103
72.5%
190/127
66.8%
57/54.7
169/162
.67/.537
217/158
72.8%
65.1/68
193/201
.574/.501
238/179
75.2%
71.4/77
212/228
.504/.454
270/197
73%
81/84.8
240/251
.476/.416
-------211/153
72.3%
-
.417/.348
Chevy 781 Oval Mild Porting Bill Jones IronN/A2.06/1.72
-
No Pipe
N/A69/62
89.9%
142/115
81%
203/152
74.9%
60.9/65.4
180/194
.716/.642
243/187
77%
72.9/80.5
216/238
.643/.593
265/207
78.1%
79.5/89.1
236/264
.561/.525
279/216
77.4%
83.7/93
248/275
.492/.456
-------226/175
77.5%
-
.417/.348
Chevy 781 Oval Bowl Blend Iron258/1162.19/1.88
4.31
No Pipe
N/A69/69
100%
142/110
77.5%
210/140
66.7%
55.7/50.4
165/149
.697/.541
256/166
64.8%
68/59.8
201/177
.637/.481
285/180
63.2%
75.7/64.8
224/192
.567/.417
276/188
68.1%
73.3/67.7
217/201
.458/.363
-------234/157
67.1%
1.10/1.62
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Chevy 781 Oval Bowl Blend Wolfplace FlowData IronN/A2.19/1.88
4.53
No Pipe
N/A69/56
81.2%
158/102
64.6%
217/135
62.2%
57.6/48.6
171/144
.72/.522
254/161
63.4%
67.4/58
200/172
.632/.467
263/186
70.7%
69.8/67
207/199
.524/.431
274/209
76.3%
72.7/75.3
216/223
.455/.404
272/219
80.5%
72.2/78.9
214/234
.387/.363
------240/169
70.4%
-
.443/.381
Chevy 781 Oval Ported IronN/A2.19/1.84N/A------324/288
88.9%
86/108
255/321
.461/.487
-------
-
-
.443/.373
Chevy 781 Oval Dave Vandenburg Mild Port Bowl Blend IronN/A2.25/1.88N/A73/61
83.6%
140/108
77.1%
211/139
65.9%
53.1/50.1
157/148
.682/.537
273/165
60.4%
68.7/59.4
203/176
.661/.478
305/186
61%
76.7/67
227/199
.591/.431
315/202
64.1%
79.2/72.8
235/216
.509/.39
301/216
71.8%
75.7/77.8
224/231
.417/.358
------258/169
65.8%
-
.456/.381
Chevy 781 Oval Short Runner Weingartner Racing IronN/A2.19/1.88
4.50
No Pipe
N/A68/57
83.8%
153/111
72.5%
215/137
63.7%
57.1/49.4
169/146
.713/.53
257/151
58.8%
68.2/54.4
202/161
.64/.438
254/158
62.2%
67.4/56.9
200/169
.506/.366
264/159
60.2%
70.1/57.3
208/170
.438/.307
263/163
62%
69.8/58.7
207/174
.374/.27
267/163
61%
70.9/58.7
210/174
.332/.236
-----239/149
62.3%
-
.443/.381
Chevy 781 Ported Dr Js Performance I-50 E-45 IronN/A2.30/1.90
-
2" Pipe
N/A66-63/68
105%
148-143/132
90.7%
228-225/161
71.1%
54.5/56.8
162/168
.716/.616
294-291/212
72.5%
70.4/74.8
209/222
.693/.608
335-333/240
71.9%
80.4/84.6
238/251
.633/.551
354-348/259
73.8%
84.5/91.3
250/271
.555/.495
363-352/268
75%
86/94.5
255/280
.484/.439
372-358/274
75.1%
87.9/96.6
260/286
.432/.393
375-364/277
75%
88.9/97.7
264/289
.389/.353
381-370/279
74.3%
90.4/98.4
268/292
.356/.32
---313/234
74.6%
-
.466/.385
Chevy 820 Weingartner Racing BrezN/A2.19/1.88
4.31
No Pipe
N/A-145/132
91%
207/166
80.2%
55/59.8
163/177
.687/.642
256/193
75.4%
68/69.5
201/206
.637/.56
295/201
68.1%
78.3/72.4
232/215
.587/.466
308/214
69.5%
81.8/77.1
242/228
.511/.414
301/221
73.4%
79.9/79.6
237/236
.428/.366
------252/188
74.5%
-
.443/.381
Chevy 820 Bowl Ported Weingartner Racing BrezN/A2.25/1.88
4.31
No Pipe
N/A-156/-220/-
55.3
164
.711
273/-
68.7
203
.661
295/-
74.2
220
.572
315/-
79.2
235
.509
337/-
84.8
251
.466
350/-
88
261
.424
-----278
-
-
.456/.381
Chevy 3993820 Oval253/114-11371/52
73.2%
145/105
72.4%
227/144
63.4%
-
260/176
67.7%
-
279/190
68.1%
-
--------228/154
67.5%
1.10/1.67
Chevy 074 Ported Mike Stark Seanz 680 Alum340/-2.30/1.88
4.60
N/A81/75
92.6%
166/119
71.7%
248/157
63.3%
59.7/56.6
177/168
.784/.607
312/191
61.2%
75.1/68.8
223/204
.739/.554
354/210
59.3%
85.2/75.7
252/224
.671/.487
378/233
61.6%
91/83.9
270/249
.597/.45
392/255
65.1%
94.3/91.9
280/272
.531/.422
400/272
68%
96.3/98
285/290
.474/.394
400/280
70%
96.3/101
285/299
.421/.361
----331/215
64.8%
1.18
.466/.381
Chevy 188 Iron CHP317/1252.19/1.88
4.25
Pipe
11868/45
66.2%
129/90
69.8%
188/131
69.7%
49.9/47.2
148/140
.624/.506
233/170
73%
61.9/61.2
183/181
.58/.493
259/188
72.6%
68.8/67.7
204/201
.516/.436
291/195
67%
77.3/70.2
229/208
.483/.377
313/200
63.9%
83.1/72
246/213
.445/.331
-/202-----236/162
68.9%
0.99/1.60
.443/.381
Chevy 188 Iron CHP317/1252.19/1.88
4.25
No Pipe
11868/45
66.2%
129/88
68.2%
188/128
68.1%
49.9/46.1
148/137
.624/.495
233/154
66.1%
61.9/55.5
183/164
.58/.446
259/172
66.4%
68.8/62
204/184
.516/.399
291/177
60.8%
77.3/63.8
229/189
.483/.342
313/181
57.8%
83.1/65.2
246/193
.445/.30
------236/150
63.7%
0.99/1.45
.443/.381
Chevy 188 Young Performance Marine IronN/A2.19/1.88
4.50
No Pipe
118-149/117
78.5%
197/150
76.1%
52.3/54
155/160
.654/.58
233/174
74.7%
61.9/62.7
183/186
.58/.504
258/184
71.3%
68.5/66.3
203/196
.514/.427
280/187
66.8%
74.3/67.4
220/200
.465/.361
287/187
65.2%
76.2/67.4
226/200
.408/.31
------234/167
71.2%
-
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Chevy 188 Young Performance Marine Ported IronN/A2.19/1.88
4.50
No Pipe
118-150/117
78%
204/151
74%
54.2/54.4
160/161
.677/.584
246/180
73.2%
65.3/64.8
194/192
.612/.522
278/192
69.1%
73.8/69.2
219/205
.554/.445
303/197
65%
80.4/71
238/210
.503/.381
311/197
63.3%
82.6/71
245/210
.442/.326
------249/172
69.3%
-
.443/.381
Chevy 188 Jim V right hand port IronN/A2.19/1.88
-
No Pipe
N/A-148/101
68.2%
213/135
63.4%
56.5/48.6
168/144
.707/.522
250/162
64.8%
66.4/58.4
197/173
.622/.47
287/176
61.3%
76.2/63.4
226/188
.571/.408
317/182
57.4%
84.2/65.6
249/194
.526/.352
328/186
56.7%
87.1/67
258/199
.466/.308
------257/157
61%
-
.443/.381
Chevy 291 Rect. 3-angle VJ Meaux Racing SF600 IronN/A2.19/1.88N/A-136-134/114
84.4%
200/153
76.5%
53.1/55.1
157/163
.664/.591
248-239/171
70.2%
64.6/61.6
192/183
.606/.496
281-261/184
67.9%
71.9/66.3
213/196
.54/.427
302-278/192
66.2%
77/69.2
228/205
.481/.371
316-287/196
65%
80/70.6
237/209
.429/.325
------240/168
70.1%
-
.443/.381
Chevy 291 Rect. M Chips IronN/A2.19/1.88N/A65/55
84.6%
147/110
74.8%
211/143
67.8%
56/51.5
166/153
.70/.553
245/172
70.2%
65/62
193/184
.61/.499
266/195
73.3%
70.6/70.2
209/208
.53/.452
284/209
73.6%
75.4/75.3
223/223
.471/.404
299/220
73.6%
79.4/79.3
235/235
.425/.364
------242/175
72.2%
-
.443/.381
Chevy 291 Rect. Weingartner Racing Brez IronN/A2.19/1.88
4.31
No Pipe
N/A-141/112
79.4%
207/139
67.1%
55/50.1
163/148
.687/.537
251/163
64.9%
66.6/58.7
197/174
.625/.473
288/180
62.5%
76.5/64.8
227/192
.573/.417
289/194
67.1%
76.7/69.9
227/207
.48/.375
291/197
67.7%
77.3/71
229/210
.414/.326
------245/164
67.1%
-
.443/.381
Chevy 291 Rect. Weingartner Racing IronN/A2.19/1.72
4.50
No Pipe
N/A67/54
80.6%
137/104
75.9%
205/132
64.4%
54.4/56.8
161/168
.68/.558
248/156
62.9%
65.8/67.1
195/199
.617/.494
287/174
60.6%
76.2/74.9
226/222
.571/.441
319/182
57.1%
84.7/78.3
251/232
.529/.384
323/187
57.9%
85.7/80.5
254/238
.459/.339
------253/156
61.6%
-
.443/.348
Chevy 401 CHP322/1202.25/1.88
4.25
Pipe
11870/53
75.7%
143/116
81.1%
200/142
71%
50.3/51.2
149/152
.646/.549
236/179
75.8%
59.4/64.5
176/191
.572/.519
275/204
74.2%
69.2/73.5
205/218
.533/.473
310/227
73.2%
78/81.8
231/242
.501/.439
330/244
73.9%
83/87.9
246/260
.457/.404
340/254
74.7%
85.5/91.5
253/271
.412/.368
-----262/195
74.5%
1.06/2.12
.456/.381
Chevy 840 Rect. Weingartner Racing BrezN/A2.19/1.72
4.31
No Pipe
N/A65/60
92.3%
137/107
78.1%
195/137
70.3%
51.8/59
153/175
.647/.579
244/159
65.2%
64.8/68.4
192/203
.607/.504
283/176
62.2%
75.1/75.7
223/224
.563/.446
307/185
60.3%
81.5/79.6
241/236
.509/.391
312/192
61.5%
82.8/82.6
245/245
.444/.348
------246/159
64.7%
-
.443/.348
Chevy 990 Iron CHP318/1252.19/1.88
4.25
Pipe
11869/53
76.8%
125/103
82.4%
183/140
76.5%
48.6/50.4
144/149
.607/.541
233/176
75.5%
61.9/63.4
183/188
.58/.51
264/198
75%
70.1/71.3
208/211
.526/.459
292/204
69.9%
77.5/73.5
230/218
.484/.394
-/207------219/164
74.8%
0.92/1.63
.443/.381
Chevy 990 Meaux Racing IronN/A2.19/1.88
4.28
Pipe
N/A-131-129/106
81.5%
202-201/138
68.5%
53.5/49.7
158/147
.669/.533
234-228/162
70.1%
61.3/58.4
182/173
.575/.47
272-250/181
69.3%
69.3/65.2
205/193
.52/.42
303-275/194
67.1%
76.7/69.9
227/207
.48/.375
322-289/197
64.5%
81.1/71
240/210
.434/.326
------236/163
69%
-
.443/.381
Chevy 990 Bowls Blended Josh IronN/A2.25/1.88
-
No Pipe
N/A72/59
81.9%
143/113
79%
215/139
64.7%
54.1/50.1
160/148
.694/.537
261/165
63.2%
65.6/59.4
194/176
.632/.478
290/186
64.1%
72.9/67
216/199
.562/.431
306/204
66.7%
77/73.5
228/218
.494/.394
323/213
65.9%
81.2/76.7
241/227
.447/.353
333/216
64.9%
83.8/77.8
248/231
.403/.313
-----267/177
66.1%
-
.456/.381
Chevy 990 Rect. VJ Bowl Cutter I-33 E-33 Back Cut Weingartner Racing BrezN/A2.19/1.88
4.31
No Pipe
N/A-183/122
66.7%
245/152
62%
65/54.8
193/162
.813/.588
290/176
60.7%
77/63.4
228/188
.722/.51
317/198
62.5%
84.2/71.3
249/211
.631/.459
329/208
63.2%
87.3/74.9
259/222
.546/.402
338/213
63%
89.7/76.7
266/227
.481/.353
341/213
62.5%
90.5/76.7
268/227
.424/.309
-----292/183
62.8%
-
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Chevy 920 Rect. IronN/A2.19/1.88118--------------
-
-
.443/.381
Chevy Rect. Port320-326/ 1202.19/1.88118-----331/201
60.7%
87.9/72.4
260/215
.549/.388
--------
-
-
.443/.381
Chevy 410 Rect. Alum300-315/ 1102.19/1.88118--------------
-
-
.443/.381
Chevy 400 Rect. Alum300-315/ 1102.25/1.88118--------------
-
-
.456/.381
Chevy ZL-1 D-port320/1202.19/1.88N/A-----331/213
64.4%
87.9/76.7
260/227
.549/.412
--------
-
1.03/1.78
.443/.381
Chevy Alum D-port320/1202.19/1.88N/A----284/206
72.5%
75.4/74.2
223/220
.565/.478
310/226
72.9%
82.3/81.4
244/241
.514/.437
328/238
72.6%
87.1/85.7
258/254
.466/.394
------307/223
72.7%
1.03/1.98
.443/.381
Chevy 14011076 Ported BH Performance AlumN/A2.25/1.92
-
No Pipe
N/A78/75
96.2%
155/119
76.8%
227/151
66.5%
57.1/52.2
169/155
.733/.572
274/182
66.4%
68.9/62.9
204/186
.664/.517
304/206
67.8%
76.5/71.1
227/211
.589/.468
335/228
68.1%
84.3/78.7
250/233
.541/.431
361/236
65.4%
90.8/81.5
269/242
.50/.383
------276/187
67.8%
-
.456/.389
Chevy Bowtie Weingartner Racing Ported BrezN/A2.19/1.88
4.31
No Pipe
N/A-170/131
77.1%
241/163
67.6%
64/58.7
190/174
.80/.63
275/186
67.6%
73/67
216/199
.684/.539
307/208
67.8%
81.5/74.9
241/222
.611/.482
336/224
66.7%
89.2/80.7
264/239
.557/.433
358/235
65.6%
95/84.7
282/251
.509/.389
373/245
65.7%
99/88.3
293/262
.464/.355
-----294/199
67.6%
-
.443/.381
GM PS 2000 - Darin Morgan SF600 AlumN/A2.48/1.85
-
No Pipe
N/A-138/125
90.6%
218/175
80.3%
45.1/65.1
134/193
.639/.687
291/212
72.9%
60.2/78.9
178/234
.64/.625
372/251
67.5%
77/93.4
228/277
.654/.592
441/285
64.6%
91.3/106
271/314
.646/.56
495/311
62.8%
102/116
304/343
.622/.524
531/325
61.2%
110/121
326/358
.584/.479
547/333
60.9%
113/124
336/367
.534/.436
548/336
61.3%
113/125
336/370
.482/.396
---398/261
65.7%
-
.502/.375
GM PS 2002 - Darin Morgan SF600 AlumN/A2.50/1.82
-
No Pipe
N/A-155/114
73.5%
247/177
71.7%
50.3/68
149/202
.718/.707
343/222
64.7%
69.9/85.3
207/253
.748/.665
423/263
62.2%
86.2/101
255/300
.738/.63
494/301
60.9%
101/116
298/343
.718/.601
532/319
60%
108/123
321/363
.663/.546
542/334
61.6%
110/128
327/380
.591/.50
551/345
62.6%
112/133
333/393
.534/.459
561/349
62.2%
114/134
339/397
.489/.418
---428/269
63%
-
.506/.369
GM / DRCE PS AlumN/A2.515/-N/A-144/-251/-
50.5
150
.725
336/-
67.6
200
.728
410/-
82.5
245
.711
475/-
95.6
283
.686
530/-
107
316
.656
545/-
110
325
.591
575/-
116
343
.554
580/-
117
346
.503
---427
-
-
.509
GM / DRCE 1 PS 2004 - Darin Morgan SF600 AlumN/A2.50/1.80
-
No Pipe
N/A-143/110
76.9%
250/167
66.8%
50.9/65.6
151/194
.727/.674
340/210
61.8%
69.3/82.5
205/245
.741/.636
422/252
59.7%
86/99
255/293
.736/.61
487/299
61.4%
99.2/117
294/348
.708/.604
531/323
60.8%
108/127
321/376
.662/.559
555/336
60.5%
113/132
335/391
.605/.509
571/342
59.9%
116/134
345/398
.553/.46
585/348
59.5%
119/137
353/405
.51/.422
---432/265
61.5%
-
.506/.365
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
GM / DRCE 2 Pro Stock Ported MBE Alum487/-2.54/1.80
4.52
No Pipe
N/A-152/117
77%
244/162
66.4%
48.2/63.7
143/189
.698/.654
329/211
64.1%
64.9/82.9
192/246
.706/.639
411/263
64%
81.1/103
240/306
.706/.637
474/306
64.6%
93.5/120
277/356
.678/.618
512/327
63.9%
101/129
299/381
.628/.566
538/340
63.2%
106/134
315/396
.577/.515
550/346
62.9%
109/136
322/403
.525/.466
562/347
61.7%
111/136
329/404
.482/.42
565/349
61.8%
112/137
330/406
.441/.384
--434/277
63.8%
1.16
.514/.365
GM / DRCE 3 - Ported AlumN/A2.55/1.83N/A-149/119
79.9%
246/176
71.5%
48.2/66.9
143/198
.701/.699
350/223
63.7%
68.5/84.8
203/251
.748/.664
429/267
62.2%
84/102
249/301
.734/.636
500/307
61.4%
97.9/117
290/346
.712/.61
544/331
60.8%
107/126
316/373
.664/.563
569/344
60.5%
111/131
330/388
.608/.512
584/354
60.6%
114/135
339/399
.555/.469
600/360
60%
117/137
348/406
.513/.429
---441/276
62.5%
-
.516/.371
GM / DRCE 3 - Darin Morgan SF600 AlumN/A2.55/1.83
-
No Pipe
N/A-147/95
64.6%
252/168
66.7%
49.3/63.9
146/189
.718/.667
343/216
63%
67.2/82.1
199/243
.733/.643
429/260
60.6%
84/98.9
249/293
.734/.62
500/295
59%
97.9/112
290/332
.712/.586
550/316
57.5%
108/120
319/356
.672/.538
573/333
58.1%
112/127
332/375
.612/.496
583/343
58.8%
114/130
338/386
.554/.454
595/350
58.8%
117/133
345/394
.509/.417
---441/264
59.8%
-
.516/.371
GM / DRCE 3 - Darin Morgan SF600 AlumN/A2.55/-N/A-154/-258/-
50.5
150
.735
345/-
67.6
200
.737
425/-
83.2
247
.727
494/-
96.7
287
.704
553/-
108
321
.675
587/-
115
341
.627
598/-
117
347
.568
602/-
118
349
.515
605/-
118
351
.47
--462
-
-
.516
GM / Pro Mod 5.2 BS - Darin Morgan SF600 AlumN/A2.60/1.95
-
No Pipe
N/A-182/160
87.9%
267/222
83.1%
50.3/74.3
149/220
.746/.827
351/286
81.5%
66.1/95.8
196/284
.736/.799
419/338
80.7%
78.9/113
234/335
.703/.756
492/358
72.8%
92.7/120
275/355
.688/.667
543/367
67.6%
102/123
303/364
.65/.586
585/371
63.4%
110/124
326/368
.613/.518
607/371
61.1%
114/124
339/368
.566/.461
606/374
61.7%
114/125
338/371
.508/.418
---450/316
70.3%
-
.527/.395
AFR 265 Oval SF600 Alum265/1152.19/1.88
4.31
2 1/8" Pipe
119-165/135
81.8%
244/169
69.3%
64.8/60.9
192/180
.81/.653
297/219
73.7%
78.8/78.9
234/234
.739/.635
324/249
76.9%
86/89.7
255/266
.645/.578
332/272
81.9%
88.1/98
261/290
.551/.526
-------272/209
76.7%
1.25/2.37
.443/.381
AFR 265 Oval Partially Ported SF600 Alum265/1152.19/1.88
4.31
2 1/8" Pipe
112-154/127
82.5%
218/164
75.2%
57.9/59.1
171/175
.723/.634
278/200
71.9%
73.8/72
219/213
.692/.58
323/230
71.2%
85.7/82.9
254/245
.643/.533
347/255
73.5%
92.1/91.9
273/272
.576/.493
-------264/195
73.9%
1.31/2.22
.443/.381
AFR 265 Oval CNC Chamber Partially Ported SF600 Alum265/1152.19/1.88
4.31
2 1/8" Pipe
112-172/157
91.3%
245/195
79.6%
65/70.2
193/208
.813/.754
295/227
76.9%
78.3/81.8
232/242
.734/.658
326/253
77.6%
86.5/91.1
256/270
.649/.587
342/265
77.5%
90.8/95.5
269/283
.567/.512
-------276/219
79.5%
1.29/2.30
.443/.381
AFR 265 CNC Chamber Wolfplace FlowData Alum265/-2.19/1.88
4.53
No Pipe
N/A76/64
84.2%
168/144
85.7%
252/196
77.8%
66.9/70.6
198/209
.836/.758
307/232
75.6%
81.5/83.6
241/248
.764/.673
339/248
73.2%
90/89.3
267/265
.675/.575
351/254
72.4%
93.2/91.5
276/271
.582/.491
-------283/215
75.8%
1.32
.443/.381
AFR 290 Oval SF600 Alum290/1152.25/1.88
4.31
2 Pipe
121-170/157
92.4%
241/190
78.8%
60.6/68.4
180/203
.778/.734
294/232
78.9%
73.9/83.6
219/248
.712/.673
332/260
78.3%
83.5/93.7
247/278
.643/.603
361/278
77%
90.8/100
269/297
.583/.537
374/292
78.1%
94.1/105
279/312
.518/.484
------295/235
79.5%
1.29/2.54
.456/.381
AFR 290 Oval SF600 Alum290/1152.25/1.88
4.31
1 7/8" Pipe
112-170/138
81.2%
240/199
82.9%
60.4/71.7
179/212
.775/.769
294/239
81.3%
73.9/86.1
219/255
.712/.693
332/268
80.7%
83.5/96.5
247/286
.643/.622
361/283
78.4%
90.8/102
269/302
.583/.547
374/298
79.7%
94.1/107
279/318
.518/.494
------295/238
80.5%
1.29/2.59
.456/.381
AFR 290 Oval CNC Weingartner Racing BrezN/A2.25/1.88
4.31
No Pipe
N/A79/67
84.8%
167/141
84.4%
242/212
87.6%
60.9/76.4
180/226
.782/.82
298/242
81.2%
74.9/87.2
222/258
.722/.702
328/267
81.4%
82.5/96.2
244/285
.636/.619
356/274
77%
89.5/98.7
265/292
.575/.53
370/279
75.4%
93.1/101
276/298
.512/.462
------294/236
80.4%
-
.456/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
AFR 290 Oval Alum290/1152.25/1.88
4.31
1 7/8" Pipe
113-170/135
79.4%
240/190
79.2%
60.4/68.4
179/203
.775/.734
294/234
79.6%
73.9/84.3
219/250
.712/.678
332/265
79.8%
83.5/95.5
247/283
.643/.615
361/280
77.6%
90.8/101
269/299
.583/.541
374/295
78.9%
94.1/106
279/315
.518/.489
------295/233
79%
1.29/2.57
.456/.381
AFR 300 Oval Alum300/-2.30/1.88
4.31
1 7/8" Pipe
113-165/135
81.8%
240/190
79.2%
57.8/68.4
171/203
.758/.734
296/234
79.1%
71.2/84.3
211/250
.701/.678
340/265
77.9%
81.8/95.5
242/283
.645/.615
378/280
74.1%
91/101
270/299
.597/.541
388/295
76%
93.4/106
277/315
.525/.489
------301/233
77.4%
1.29
.466/.381
AFR 305 SF600 Alum305/-2.19/1.88
4.60
2 1/8" Pipe
119-154/131
85.1%
223/176
78.9%
59.2/63.4
175/188
.74/.68
287/219
76.3%
76.2/78.9
226/234
.714/.635
335/251
74.9%
88.9/90.4
264/268
.667/.582
363/276
76%
96.4/99.4
286/295
.602/.533
-------272/211
77.3%
1.19
.443/.381
AFR 305 CNC Chambers SF600 Alum305/-2.19/1.88
4.60
2 1/8" Pipe
121-163/135
82.8%
241/192
79.7%
64/69.2
190/205
.80/.742
300/237
79%
79.6/85.4
236/253
.747/.687
344/268
77.9%
91.3/96.5
271/286
.685/.622
367/284
77.4%
97.4/102
289/303
.609/.549
368/298
81%
97.7/107
289/318
.523/.494
------297/236
79.3%
1.21
.443/.381
AFR 305 CNC Chambers Partially Ported SF600 Alum305/-2.19/1.88
4.31
2 1/8" Pipe
121-168/142
84.5%
242/187
77.3%
64.2/67.4
190/200
.803/.723
303/225
74.3%
80.4/81.1
238/240
.754/.652
339/252
74.3%
90/90.8
267/269
.675/.584
360/271
75.3%
95.6/97.6
283/289
.597/.524
-------282/215
76.3%
1.18
.443/.381
AFR 305 VJ Bowl Work Foxwell Motorsports AlumN/A2.25/1.88
4.50
2 1/4" Pipe
N/A-169-172/150
88%
246-247/196
79.5%
62/70.6
184/209
.796/.758
305-300/239
79%
76.1/86.1
225/255
.733/.693
348-334/266
78%
85.8/95.8
254/284
.661/.617
373-359/281
76.8%
92.1/101
273/300
.591/.543
380-375/290
76.8%
94.9/104
281/310
.523/.48
384-387/302
78.3%
97/109
287/322
.467/.438
386-394/312
80%
98.1/112
291/333
.42/.402
----322/255
78.9%
-
.456/.381
AFR 315 CNC SF600 Alum315/-2.25/1.88
4.60
2 1/8" Pipe
121-169/146
86.4%
249/184
73.9%
62.6/66.3
186/196
.804/.711
312/238
76.3%
78.5/85.7
233/254
.756/.69
353/271
76.8%
88.8/97.6
263/289
.684/.629
380/296
77.9%
95.6/107
283/316
.614/.572
386/310
80.3%
97.1/112
288/331
.534/.514
387/315
81.4%
97.3/113
288/336
.469/.457
-----319/251
78.7%
1.23
.456/.381
AFR 315 Alum CHP315/-2.25/1.88
4.25
Pipe
N/A76/62
81.6%
162/133
82.1%
232/199
85.8%
58.3/71.7
173/212
.749/.769
282/256
90.8%
70.9/92.2
210/273
.683/.742
321/284
88.5%
80.7/102
239/303
.622/.659
348/290
83.3%
87.5/104
259/310
.562/.561
368/293
79.6%
92.6/106
274/313
.509/.485
370/300
81.1%
93.1/108
276/320
.448/.435
-----298/251
84.3%
1.17
.456/.381
AFR 315 CNC Wolfplace FlowData Alum315/-2.25/1.88
4.31
No Pipe
N/A78/69
88.5%
162/142
87.7%
239/198
82.8%
60.1/71.3
178/211
.772/.765
290/240
82.8%
72.9/86.5
216/256
.703/.696
334/267
79.9%
84/96.2
249/285
.647/.619
358/280
78.2%
90/101
267/299
.578/.541
374/283
75.7%
94.1/102
279/302
.518/.469
377/286
75.9%
94.8/103
281/305
.457/.415
-----305/242
79.5%
1.20
.456/.381
AFR 315 CNC Wolfplace FlowData Alum315/-2.25/1.88
4.53
No Pipe
N/A78/69
88.5%
164/142
86.6%
247/198
80.2%
62.1/71.3
184/211
.798/.765
309/240
77.7%
77.7/86.5
230/256
.749/.696
350/267
76.3%
88/96.2
261/285
.678/.619
375/280
74.7%
94.3/101
279/299
.606/.541
383/283
73.9%
96.3/102
285/302
.53/.469
381/286
75.1%
95.8/103
284/305
.461/.415
-----316/242
76.8%
1.22
.456/.381
AFR 325 SF600 Alum325/-2.30/1.88
4.60
2 1/8" Pipe
119-142/131
92.3%
213/176
82.6%
51.3/63.4
152/188
.673/.68
280/219
78.2%
67.4/78.9
200/234
.664/.635
331/251
75.8%
79.7/90.4
236/268
.628/.582
370/276
74.6%
89.1/99.4
264/295
.585/.533
384/285
74.2%
92.4/103
274/304
.52/.472
------287/223
77.8%
1.18
.466/.381
AFR 325 Weingartner Racing BrezN/A2.30/1.88
4.31
No Pipe
N/A81/63
77.8%
166/137
82.5%
236/182
77.1%
56.8/65.6
168/194
.746/.704
293/226
77.1%
70.5/81.4
209/241
.694/.655
340/258
75.9%
81.8/92.9
242/275
.645/.598
358/274
76.5%
86.2/98.7
255/292
.566/.53
377/280
74.3%
90.7/101
269/299
.511/.464
383/282
73.6%
92.2/102
273/301
.454/.409
386/282
73.1%
92.9/102
275/301
.407/.363
----317/240
75.7%
-
.466/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
AFR 335 CNC SF600 Alum335/-2.30/1.88
4.60
2 1/8" Pipe
121-164/144
87.8%
240/197
82.1%
57.8/71
171/210
.758/.762
304/257
84.5%
73.2/92.6
217/274
.72/.745
352/285
81%
84.7/103
251/304
.667/.661
385/311
80.8%
92.7/112
275/332
.608/.601
404/319
79%
97.2/115
288/340
.547/.528
410/325
79.3%
98.7/117
292/347
.486/.471
-----323/263
81.4%
1.22
.466/.381
AFR 335 CNC SF600 Out of Box Alum335/-2.30/1.88
4.60
No Pipe
N/A-170/133
78.2%
249/178
71.5%
59.9/64.1
178/190
.787/.688
313/230
73.5%
75.3/82.9
223/245
.742/.667
362/259
71.5%
87.1/93.3
258/276
.686/.601
396/268
67.7%
95.3/96.5
282/286
.626/.518
405/273
67.4%
97.5/98.3
289/291
.548/.452
------316/224
70.8%
1.21
.466/.381
AFR 335 CNC SF600 Alum335/-2.30/1.88
-
2 1/8" Pipe
121-164/142
86.6%
240/193
80.4%
57.8/69.5
171/206
.758/.746
304/244
80.3%
73.2/87.9
217/260
.72/.707
352/278
79%
84.7/100
251/297
.667/.645
385/310
80.5%
92.7/112
275/331
.608/.599
404/321
79.5%
97.2/116
288/343
.547/.532
410/327
79.8%
98.7/118
292/349
.486/.474
-----323/259
80.3%
1.22
.466/.381
AFR 335 Ported Foxwell Motorsports I-45 E-45 Alum344/-2.35/1.88N/A-155-154/128
82.8%
239-238/181
75.9%
55/65.2
163/193
.738/.70
304-274/227
78.5%
66.6/81.8
197/242
.67/.658
353-345/274
78.5%
80.5/98.7
238/292
.648/.636
394-377/304
78.9%
88.9/110
263/324
.596/.588
422-398/310
75.6%
94.5/112
280/331
.543/.514
430-411/319
75.9%
96.9/115
287/340
.488/.462
437-424/321
74.6%
99.3/116
294/343
.444/.414
442-430/325
74.5%
101/117
298/347
.404/.377
---346/265
76.7%
1.27
.476/.381
AFR 345 SF600 Alum345/-2.30/1.88
4.60
2 1/8" Pipe
119-141/135
95.7%
212/169
79.7%
51/60.9
151/180
.67/.653
279/219
78.5%
67.2/78.9
199/234
.661/.635
333/249
74.8%
80.1/89.7
237/266
.631/.578
372/272
73.1%
89.5/98
265/290
.588/.526
401/285
71.1%
96.5/103
286/304
.543/.472
405/290
71.6%
97.5/104
289/310
.48/.42
-----306/231
75.5%
1.17
.466/.381
AFR 345 NPS AlumN/A2.30/1.88
4.25
No Pipe
N/A75/57
76%
137/116
84.7%
209-208/176
84.4%
50.2/63.4
149/188
.659/.68
271-277/221
80.7%
65.9/79.6
195/236
.649/.641
319-327/243
75.2%
77.7/87.5
230/259
.612/.564
345-364/253
71.4%
85.3/91.1
253/270
.56/.489
357-388/261
70.1%
89.7/94
266/279
.504/.432
368-398/264
68.9%
92.2/95.1
273/282
.454/.383
-----293/219
74.7%
-
.466/.381
AFR 357 CNC SF600 Alum357/-2.30/1.88
4.60
2 1/8" Pipe
121-167/144
86.2%
242/197
81.4%
58.2/71
173/210
.765/.762
307/257
83.7%
73.9/92.6
219/274
.728/.745
354/285
80.5%
85.2/103
252/304
.671/.661
393/311
79.1%
94.6/112
280/332
.621/.601
415/319
76.9%
99.9/115
296/340
.562/.528
425/325
76.5%
102/117
303/347
.504/.471
-----329/263
79.8%
1.19
.466/.381
AFR 377 CNC SF600 Alum357/-2.30/1.88
4.60
2 1/8" Pipe
121-176/148
84.1%
260/205
78.8%
62.6/73.8
185/219
.822/.792
328/263
80.2%
78.9/94.7
234/281
.777/.762
382/302
79.1%
91.9/109
272/322
.724/.70
415/316
76.1%
99.9/114
296/337
.656/.611
427/330
77.3%
103/119
305/352
.578/.547
434/340
78.3%
104/122
310/363
.514/.493
437/345
78.9%
105/124
312/368
.46/.445
----357/281
78.7%
1.22
.466/.381
AFR 385 CNC Alum385/-2.35/1.88
4.60
2.125" Pipe
121-176/149
84.7%
256/205
80.1%
59/73.8
175/219
.792/.792
327/267
81.7%
75.4/96.2
223/285
.758/.774
386/302
78.2%
89/109
264/322
.716/.70
421/322
76.5%
97.1/116
288/344
.651/.622
444/334
75.2%
102/120
303/357
.588/.553
452/344
76.1%
104/124
309/367
.524/.499
456/350
76.8%
105/126
312/374
.47/.451
----365/284
77.9%
1.18
.476/.381
AFR 385 Out of Box AlumN/A2.35/1.88
4.625
2.25" Pipe
N/A-161/139
86.3%
230/210
91.3%
53/75.7
157/224
.711/.812
299/273
91.3%
68.9/98.3
204/291
.693/.791
357/299
83.8%
82.3/108
244/319
.662/.693
400/309
77.3%
92.2/111
273/330
.618/.597
427/315
73.8%
98.4/113
292/336
.566/.522
438/319
72.8%
101/115
299/340
.508/.462
-----330/266
80.6%
-
.476/.381
AFR 385 3v Performance Bad Port Out of Box Alum385/-2.35/-N/A78/-167/-242/-
55.8
165
.748
303/-
69.9
207
.703
349/-
80.5
238
.648
381/-
87.8
260
.589
409/-
94.3
279
.542
423/-
97.5
289
.491
433/-
99.8
296
.446
440/-
101
301
.408
---350
-
1.14
.476
AJPE 316 Billet Alum316/1192.19/1.85
4.25
2.375" Pipe
118-151/122
80.8%
233/174
74.7%
61.9/64.7
183/192
.773/.684
290/244
84.1%
77/90.8
228/269
.722/.719
325/283
87.1%
86.3/105
256/312
.647/.667
348/302
86.8%
92.4/112
274/333
.577/.593
360/310
86.1%
95.6/115
283/342
.512/.522
367/315
85.8%
97.4/117
289/347
.457/.464
375/-
99.6
295
.415
----306/250
-
1.19/2.65
.443/.375
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
AJPE 368 02 Billet Alum368/1302.35/1.88
4.50
2.375" Pipe
118-159/118
74.2%
242/175
72.3%
55.8/63
165/187
.748/.676
303/249
82.2%
69.9/89.7
207/266
.703/.722
337/291
86.4%
77.7/105
230/311
.625/.675
387/305
78.8%
89.2/110
264/326
.598/.59
390/315
80.8%
89.9/113
266/336
.517/.522
407/322
79.1%
93.8/116
278/344
.472/.467
422/329
78%
97.3/119
288/351
.435/.424
----331/263
79.5%
1.15/2.53
.476/.381
AJPE 368 03 Billet Alum368/1302.35/1.88
4.50
2.375" Pipe
111-147/131
89.1%
222/181
81.5%
51.2/65.2
152/193
.687/.70
287/252
87.8%
66.2/90.8
196/269
.666/.731
328/295
89.9%
75.6/106
224/315
.609/.684
364/313
86%
83.9/113
249/334
.563/.605
392/322
82.1%
90.4/116
268/344
.52/.533
406/327
80.5%
93.6/118
277/349
.471/.474
421/333
79.1%
97.1/120
288/355
.434/.429
----321/269
83.9%
1.14/2.56
.476/.381
AJPE 5.3 Inch BS Alum591/2402.70/2.05
-
2.4" Pipe
102-170/131
77.1%
255/183
71.8%
44.5/55.4
132/164
.686/.649
363/232
63.9%
63.4/70.3
188/208
.733/.617
449/289
64.4%
78.4/87.6
232/259
.725/.615
525/336
64%
91.7/102
272/302
.707/.596
598/375
62.7%
104/114
309/337
.69/.57
650/404
62.2%
114/122
336/363
.656/.537
661/426
64.4%
115/129
342/382
.593/.503
665/437
65.7%
116/132
344/392
.537/.465
670/448
66.9%
117/136
347/402
.492/.433
--501/326
65.1%
1.13/1.87
.547/.415
Avenger 345 CNC 24 Deg Alum345/1102.30/1.90110/11980/75
93.8%
151/133
88.1%
245/170
69.4%
59/60
175/178
.774/.65
304/201
66.1%
73.2/70.9
217/210
.72/.577
342/228
66.7%
82.3/80.4
244/238
.648/.523
364/258
70.9%
87.6/91
260/270
.575/.493
378/277
73.3%
91/97.7
270/289
.512/.454
384/288
75%
92.4/102
274/301
.455/.413
-----310/222
71.7%
1.11/2.62
.466/.385
Avenger 360 CNC 24 Deg Alum360/1102.30/1.90110/11979/75
94.9%
149/138
92.6%
218/178
81.7%
52.5/62.8
155/186
.689/.681
278/200
71.9%
66.9/70.5
198/209
.659/.574
337/226
67.1%
81.1/79.7
240/236
.639/.519
367/262
71.4%
88.3/92.4
262/274
.58/.501
381/282
74%
91.7/99.5
272/295
.516/.462
392/293
74.7%
94.3/103
280/306
.464/.42
-----303/226
74.4%
1.09/2.66
.466/.385
BMF 310 CNC Port Alum310/1502.30/1.88119--259/174
67.2%
62.3/62.7
185/186
.818/.673
325/212
65.2%
78.2/76.4
232/226
.77/.615
374/250
66.8%
90/90.1
267/267
.709/.58
386/277
71.8%
92.9/99.8
275/296
.61/.535
393/292
74.3%
94.6/105
280/312
.532/.484
394/304
77.2%
94.8/110
281/324
.467/.441
400/315
78.8%
96.3/113
285/336
.421/.406
----362/261
72.1%
1.29/2.10
.466/.381
BMF 310 Out of Box Weingartner Racing Alum310/-2.30/1.88
4.50
No Pipe
N/A77/68
88.3%
153/130
85%
235/176
74.9%
56.6/63.4
168/188
.743/.68
281/214
76.2%
67.6/77.1
200/228
.666/.62
323/248
76.8%
77.7/89.3
230/265
.612/.575
358/268
74.9%
86.2/96.5
255/286
.566/.518
357/283
79.3%
85.9/102
255/302
.483/.469
357/299
83.8%
85.9/108
255/319
.423/.433
-----295/231
78.4%
1.15
.466/.381
BMF 310 Out of Box Weingartner Racing Brez Alum310/-2.30/1.88
4.31
No Pipe
N/A78/63
80.8%
151/133
88.1%
219/171
78.1%
52.7/61.6
156/183
.692/.661
273/216
79.1%
65.7/77.8
195/231
.647/.626
317/258
81.4%
76.3/92.9
226/275
.601/.598
352/274
77.8%
84.7/98.7
251/292
.556/.53
372/289
77.7%
89.5/104
265/308
.504/.479
377/300
79.6%
90.7/108
269/320
.447/.435
-----294/234
79.6%
1.22
.466/.381
BMF/CFE 10sec CNC Alum310/-2.25/1.88
4.31
No Pipe
N/A67/61
91%
130/125
96.2%
204/160
78.4%
51.3/57.6
152/171
.659/.618
282/208
73.8%
70.9/74.9
210/222
.683/.603
324/243
75%
81.5/87.5
241/259
.628/.564
356/265
74.4%
89.5/95.5
265/283
.575/.512
378/277
73.3%
95.1/99.8
282/296
.523/.459
381/288
75.6%
95.8/104
284/307
.461/.417
-----294/224
76.2%
1.23
.456/.381
BMF/CFE 10sec CNC Alum310/-2.25/1.88
4.31
2" Pipe
N/A67/61
91%
130/131
100%
204/179
87.7%
51.3/64.5
152/191
.659/.692
282/220
78%
70.9/79.3
210/235
.683/.638
324/256
79%
81.5/92.2
241/273
.628/.594
356/280
78.7%
89.5/101
265/299
.575/.541
378/285
75.4%
95.1/103
282/304
.523/.472
381/307
80.6%
95.8/111
284/328
.461/.445
-----294/237
80.7%
1.23
.456/.381
BMF 330 CNC Port Alum330/1502.30/1.88119--264/174
65.9%
63.5/62.7
188/186
.834/.673
331/212
64%
79.7/76.4
236/226
.784/.615
397/250
63%
95.6/90.1
283/267
.753/.58
398/277
69.6%
95.8/99.8
284/296
.629/.535
398/292
73.4%
95.8/105
284/312
.539/.484
400/304
76%
96.3/110
285/324
.474/.441
400/315
78.8%
96.3/113
285/336
.421/.406
----370/261
70.5%
1.21/2.10
.466/.381
BMF 350 CNC Port Alum350/1502.30/1.88119--259/174
67.2%
62.3/62.7
185/186
.818/.673
326/212
65%
78.5/76.4
232/226
.773/.615
372/250
67.2%
89.5/90.1
265/267
.705/.58
407/277
68.1%
98/99.8
290/296
.643/.535
414/292
70.5%
99.6/105
295/312
.561/.484
416/304
73.1%
100/110
297/324
.493/.441
418/315
75.4%
101/113
298/336
.44/.406
----373/261
69.8%
1.19/2.10
.466/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
BMF 385 CNC Port Alum385/1502.30/1.88119--267/174
65.2%
64.3/62.7
190/186
.844/.673
336/212
63.1%
80.9/76.4
240/226
.796/.615
381/250
65.6%
91.7/90.1
272/267
.722/.58
405/277
68.4%
97.5/99.8
289/296
.64/.535
420/292
69.5%
101/105
300/312
.569/.484
432/304
70.4%
104/110
308/324
.512/.441
442/315
71.3%
106/113
315/336
.466/.406
----383/261
68%
1.15/2.10
.466/.381
BMF2 405 CNC Port Alum405/1502.35/1.88119--258/174
67.4%
59.5/62.7
176/186
.798/.673
325/212
65.2%
74.9/76.4
222/226
.754/.615
375/250
66.7%
86.5/90.1
256/267
.696/.58
411/277
67.4%
94.8/99.8
281/296
.636/.535
429/292
68.1%
98.9/105
293/312
.569/.484
443/304
68.6%
102/110
303/324
.514/.441
456/315
69.1%
105/113
312/336
.47/.406
----385/261
67.6%
1.13/2.10
.476/.381
BMF - Texas Pro Stock Ported Slick Rick Racing Heads AlumN/A2.35/-N/A--230/-
53
157
.711
312/-
71.9
213
.724
376/-
86.7
257
.698
418/-
96.4
286
.646
451/-
104
308
.598
466/-
107
318
.54
475/-
110
324
.49
480/-
111
328
.445
484/-
112
331
.408
--410
-
-
.476
BMF - Texas Pro Stock Ported Slick Rick Racing Heads AlumN/A2.375/-N/A--232/-
52.4
155
.71
314/-
70.9
210
.721
383/-
86.5
256
.703
437/-
98.6
292
.669
459/-
104
307
.602
480/-
108
321
.551
492/-
111
329
.502
495/-
112
331
.454
496/-
112
332
.414
--421
-
-
.481
BMF - Texas Pro Stock Ported Slick Rick Racing Heads AlumN/A2.40/-N/A--250/-
55.3
164
.757
320/-
70.7
210
.727
390/-
86.2
255
.709
446/-
98.6
292
.675
473/-
105
310
.614
484/-
107
317
.55
494/-
109
324
.499
504/-
111
330
.458
511/-
113
335
.422
--430
-
-
.486
Brodix JJ 270 Alum270/-2.25/1.88119-159/116
73%
223/145
65%
56.1/52.2
166/155
.72/.561
270/172
63.7%
67.9/62
201/184
.654/.499
314/196
62.4%
79/70.6
234/209
.609/.455
334/217
65%
84/78.2
249/232
.539/.419
340/236
69.4%
85.5/85
253/252
.471/.391
------273/180
66%
1.26
.456/.381
Brodix JJ 294 Alum294/-2.25/1.88119-160/116
72.5%
226/145
64.2%
56.8/52.2
168/155
.73/.561
276/172
62.3%
69.4/62
206/184
.669/.499
314/196
62.4%
79/70.6
234/209
.609/.455
337/217
64.4%
84.8/78.2
251/232
.544/.419
342/236
69%
86/85
255/252
.473/.391
------276/180
65.4%
1.16
.456/.381
Brodix-HVH Oval AlumN/A2.25/1.88N/A-170/126
74.1%
250/177
70.8%
62.9/63.8
186/189
.807/.684
307/212
69.1%
77.2/76.4
229/226
.744/.615
347/246
70.9%
87.3/88.6
259/263
.672/.571
373/267
71.6%
93.8/96.2
278/285
.602/.516
384/279
72.7%
96.6/101
286/298
.532/.462
388/288
74.2%
97.6/104
289/307
.47/.417
-----317/228
71.9%
-
.456/.381
Brodix BB-1 OEFI Alum258/-2.25/1.88119-162/106
65.4%
219/137
62.6%
55.1/49.4
163/146
.707/.53
252/166
65.9%
63.4/59.8
188/177
.61/.481
265/190
71.7%
66.6/68.4
197/203
.514/.441
272/211
77.6%
68.4/76
203/225
.439/.408
273/225
82.4%
68.7/81.1
203/240
.378/.373
------241/173
71.7%
1.06
.456/.381
Brodix RR BB-O CCM Alum270/-2.25/1.88
-
Pipe
11974/64
86.5%
163/113
69.3%
218/145
66.5%
54.8/52.2
162/155
.704/.561
267/171
64%
67.2/61.6
199/183
.647/.496
306/194
63.4%
77/69.9
228/207
.593/.45
328/216
65.9%
82.5/77.8
244/231
.53/.417
341/234
68.6%
85.8/84.3
254/250
.472/.388
348/244
70.1%
87.5/87.9
259/260
.422/.354
-----282/188
66.8%
1.29
.456/.381
Brodix RR BB-O 26 Deg Alum270/-2.25/1.88119-154/106
68.8%
221/137
62%
55.6/49.4
165/146
.714/.53
274/164
59.9%
68.9/59.1
204/175
.664/.475
316/188
59.5%
79.5/67.7
235/201
.612/.436
335/211
63%
84.3/76
250/225
.541/.408
342/229
67%
86/82.5
255/244
.473/.379
------274/173
63%
1.27
.456/.381
Brodix RR BB-O CNC Chamber Wolfplace FlowData Alum270/-2.25/1.88
4.53
No Pipe
N/A77/65
84.4%
152/118
77.6%
224/147
65.6%
56.3/53
167/157
.724/.568
283/178
62.9%
71.2/64.1
211/190
.686/.516
318/205
64.5%
80/73.8
237/219
.616/.475
344/230
66.9%
86.5/82.9
256/245
.556/.445
347/248
71.5%
87.3/89.3
259/265
.48/.411
------278/188
67.5%
1.29
.456/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Brodix RR BB-R 26 Deg Alum294/-2.25/1.88119-160/106
66.3%
227/137
60.4%
57.1/49.4
169/146
.733/.53
279/164
58.8%
70.2/59.1
208/175
.676/.475
317/188
59.3%
79.7/67.7
236/201
.614/.436
328/211
64.3%
82.5/76
244/225
.53/.408
340/229
67.4%
85.5/82.5
253/244
.471/.379
------275/173
62.7%
1.16
.456/.381
Brodix RR BB-R CNC Chamber Hekimian Racing AlumN/A2.25/1.88119-161/112
69.6%
228/146
64%
57.3/52.6
170/156
.736/.564
281/178
63.3%
70.7/64.1
209/190
.681/.516
321/203
63.2%
80.7/73.1
239/217
.622/.471
339/222
65.5%
85.3/80
253/237
.547/.429
346/235
67.9%
87/84.7
258/251
.479/.389
------279/183
65.4%
-
.456/.381
Brodix RR BB-R Ported Mike Stark I-45 E-45 Saenz 680 Alum310/-2.25/1.88
4.31
No Pipe
N/A75/66
88%
156/123
78.8%
230/154
67%
57.8/55.5
171/164
.743/.595
297/184
62%
74.7/66.3
221/196
.719/.533
341/209
61.3%
85.8/75.3
254/223
.661/.485
370/232
62.7%
93.1/83.6
276/248
.598/.448
384/250
65.1%
96.6/90.1
286/267
.532/.414
385/265
68.8%
96.8/95.5
287/283
.466/.384
387/275
71.1%
97.3/99.1
288/294
.417/.354
----319/212
66.4%
1.25
.456/.381
Brodix RR BB-2 Plus Alum312/-2.25/1.88119-150/116
77.3%
215/145
67.4%
54.1/52.2
160/155
.694/.561
265/172
64.9%
66.6/62
197/184
.642/.499
311/196
63%
78.2/70.6
232/209
.603/.455
334/217
65%
84/78.2
249/232
.539/.419
344/236
68.6%
86.5/85
256/252
.476/.391
------270/180
66.8%
1.10
.456/.381
Brodix RR BB-2 Plus STS Alum320/-2.25/1.88119-162/126
77.8%
244/164
67.2%
61.4/59.1
182/175
.788/.634
285/201
70.5%
71.7/72.4
212/215
.69/.583
328/228
69.5%
82.5/82.1
244/243
.636/.529
359/251
69.9%
90.3/90.4
268/268
.58/.485
369/267
72.4%
92.8/96.2
275/285
.511/.442
373/284
76.1%
93.8/102
278/303
.452/.412
-----303/217
71.7%
1.17
.456/.381
Brodix BB-1 26 Deg Alum280/-2.25/1.88119-150/106
70.7%
209/137
65.6%
52.6/49.4
156/146
.675/.53
259/166
64.1%
65.1/59.8
193/177
.627/.481
290/190
65.5%
72.9/68.4
216/203
.562/.441
300/211
70.3%
75.5/76
224/225
.484/.408
303/225
74.3%
76.2/81.1
226/240
.419/.373
------252/173
68.5%
1.08
.456/.381
Brodix BB-1 26 Deg 305 CNC M2 Race Systems Alum305/-2.25/1.88119-154/135
87.7%
236/176
74.6%
59.4/63.4
176/188
.762/.68
293/211
72%
73.7/76
218/225
.71/.612
339/242
71.4%
85.3/87.2
253/258
.657/.561
362/265
73.2%
91/95.5
270/283
.585/.512
371/281
75.7%
93.3/101
276/300
.514/.466
------293/218
74.6%
1.22
.456/.381
Brodix BB-1 26 Deg 308 CNC M2 Race Systems Alum308/-2.30/1.88
4.50
118--253/188
74.3%
60.9/67.7
180/201
.799/.727
311/215
69.1%
74.9/77.5
222/229
.737/.623
349/250
71.6%
84/90.1
249/267
.662/.58
367/282
76.8%
88.3/102
262/301
.58/.545
376/301
80.1%
90.5/108
268/321
.509/.499
380/307
80.8%
91.5/111
271/328
.45/.445
-----339/257
75.8%
1.23
.466/.381
Brodix BB-2 26 Deg Alum305/-2.25/1.88119-157/107
68.2%
212/137
64.6%
53.3/49.4
158/146
.685/.53
263/166
63.1%
66.1/59.8
196/177
.637/.481
294/190
64.6%
73.9/68.4
219/203
.57/.441
312/214
68.6%
78.5/77.1
233/228
.504/.414
320/226
70.6%
80.5/81.4
238/241
.443/.374
------260/173
66.8%
1.05
.456/.381
Brodix BB-2 Plus 26 Deg Alum312/-2.25/1.88119-150/122
81.3%
215/148
68.8%
54.1/53.3
160/158
.694/.572
265/187
70.6%
66.6/67.4
197/200
.642/.542
311/216
69.5%
78.2/77.8
232/231
.603/.501
334/229
68.6%
84/82.5
249/244
.539/.443
344/238
69.2%
86.5/85.7
256/254
.476/.394
------270/190
70.4%
1.10
.456/.381
Brodix BB-2 Plus STS 26 Deg Alum320/-2.25/1.88119-162/132
81.5%
244/169
69.3%
61.4/60.9
182/180
.788/.653
285/204
71.6%
71.7/73.5
212/218
.69/.591
328/234
71.3%
82.5/84.3
244/250
.636/.543
359/261
72.7%
90.3/94
268/279
.58/.504
369/274
74.3%
92.8/98.7
275/292
.511/.454
373/284
76.1%
93.8/102
278/303
.452/.412
-----303/223
73.5%
1.17
.456/.381
Brodix BB-2X 26 Deg Alum340/-2.30/1.88119-154/106
68.8%
211/137
64.9%
50.8/49.4
150/146
.667/.53
260/166
63.8%
62.6/59.8
185/177
.616/.481
292/190
65.1%
70.3/68.4
208/203
.554/.441
312/211
67.6%
75.1/76
223/225
.493/.408
323/225
69.7%
77.7/81.1
230/240
.437/.373
------259/173
66.7%
0.95
.466/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Brodix BB-2X 26 Deg Alum340/-2.30/1.88119-153/122
79.7%
221/138
62.4%
53.2/49.7
158/147
.698/.533
276/171
62%
66.4/61.6
197/183
.654/.496
322/198
61.5%
77.5/71.3
230/211
.61/.459
357/216
60.5%
85.9/77.8
255/231
.564/.417
363/229
63.1%
87.4/82.5
259/244
.492/.379
------282/179
63.5%
1.07
.466/.381
Brodix BB-2X 26 Deg 3V Performance Ported AlumN/A2.30/1.88
4.50
No Pipe
N/A-148-146/126
85.7%
213-209/161
76.3%
50.8/58
150/172
.667/.622
265-258/204
78%
62.9/73.5
186/218
.62/.591
310-301/244
79.9%
73.5/87.9
218/260
.579/.566
345-319/275
82.8%
79.9/99.1
237/294
.525/.532
368-337/291
82.6%
84.8/105
251/311
.477/.482
376-353/301
82.6%
87.7/108
260/321
.432/.436
-----282/229
81.2%
-
.466/.381
Brodix BB-2X 26 Deg CNC CC Alum341/-2.30/1.88N/A-153/132
86.3%
225/176
78.2%
54.2/63.4
160/188
.711/.68
285/211
74%
68.6/76
203/225
.675/.612
333/235
70.6%
80.1/84.7
237/251
.631/.545
368/254
69%
88.6/91.5
262/271
.581/.491
365/264
72.3%
87.9/95.1
260/282
.494/.437
365/270
74%
87.9/97.3
260/288
.432/.391
-----299/220
73.6%
1.08
.466/.381
Brodix BB-2X 26 Deg Sonny's Alum341/1242.30/1.90119-------367/265
72.2%
88.3/93.5
262/277
.435/.38
------
-
1.08/2.14
.466/.385
Brodix BB-2Xtra 26 Deg Alum340/-2.30/1.88119-160/132
82.5%
220/159
72.3%
53/57.3
157/170
.695/.615
277/193
69.7%
66.7/69.5
198/206
.656/.56
325/219
67.4%
78.2/78.9
232/234
.616/.508
360/234
65%
86.6/84.3
257/250
.569/.452
379/250
66%
91.2/90.1
270/267
.513/.414
------287/198
69%
1.11
.466/.381
Brodix BB-2Xtra 26 Deg CNC M2 Race Systems Alum355/-2.30/1.88
4.50
119-183/134
73.2%
235/177
75.3%
56.6/63.8
168/189
.743/.684
294/216
73.5%
70.8/77.8
210/231
.697/.626
340/247
72.6%
81.8/89
242/264
.645/.573
376/268
71.3%
90.5/96.5
268/286
.594/.518
395/280
70.9%
95.1/101
282/299
.535/.464
408/288
70.6%
98.2/104
291/307
.483/.417
-----319/230
72.2%
1.15
.466/.381
Brodix BB-3 26 Deg EVM 30 Alum370/-2.35/1.88119-145/93
64.1%
206/129
62.6%
47.5/46.5
141/138
.637/.499
265/161
60.8%
61.1/58
181/172
.615/.467
316/187
59.2%
72.9/67.4
216/200
.586/.434
351/213
60.7%
80.9/76.7
240/227
.543/.412
371/229
61.7%
85.5/82.5
253/244
.492/.379
------276/169
61.2%
1.00
.476/.381
Brodix BB-3Xtra 24 Deg Alum363/-2.30/1.88119-154/142
92.2%
230/187
81.3%
55.4/67.4
164/200
.727/.723
300/217
72.3%
72.2/78.2
214/232
.711/.629
356/243
68.3%
85.7/87.5
254/259
.675/.564
387/265
68.5%
93.1/95.5
276/283
.611/.512
389/275
70.7%
93.6/99.1
277/294
.527/.456
389/280
72%
93.6/101
277/299
.461/.406
391/281
71.9%
94.1/101
279/300
.412/.362
----325/236
72.8%
1.08
.466/.381
Brodix BB-3Xtra BP 24 Deg CNC Alum366/-2.30/1.88119-154/130
84.4%
237/177
74.7%
57/63.8
169/189
.749/.684
307/239
77.9%
73.9/86.1
219/255
.728/.693
362/278
76.8%
87.1/100
258/297
.686/.645
394/284
72.1%
94.8/102
281/303
.622/.549
416/290
69.7%
100/104
297/310
.563/.48
423/295
69.7%
102/106
302/315
.501/.428
423/297
70.2%
102/107
302/317
.446/.383
----340/249
73.3%
1.16
.466/.381
Brodix BB-3Xtra O 24 Deg 335 CNC I-45 E-45 Alum335/-2.35/1.88119-162/142
87.7%
233/187
80.3%
53.7/67.4
159/200
.721/.723
298/217
72.8%
68.7/78.2
204/232
.691/.629
355/243
68.5%
81.8/87.5
243/259
.659/.564
397/265
66.8%
91.5/95.5
271/283
.614/.512
417/275
65.9%
96.1/99.1
285/294
.553/.456
420/280
66.7%
96.8/101
287/299
.487/.406
411/281
68.4%
94.8/101
281/300
.424/.362
----337/236
70.2%
1.25
.476/.381
Brodix BB-3Xtra O 24 Deg 380 CNC I-45 E-45 Alum380/-2.35/1.88119-159/134
84.3%
237/182
76.8%
54.6/65.6
162/194
.733/.704
309/219
70.9%
71.2/78.9
211/234
.717/.635
360/254
70.6%
83/91.5
246/271
.668/.589
401/254
63.3%
92.5/91.5
274/271
.62/.491
430/301
70%
99.1/108
294/321
.57/.499
443/306
69.1%
102/110
303/327
.514/.444
442/311
70.4%
102/112
302/332
.456/.401
----348/245
70.5%
1.17
.476/.381
Brodix BB-3Xtra O 24 Deg 332 CNC I-50 E-50 Alum332/-2.30/1.88119-153/130
85%
231/177
76.6%
55.6/63.8
165/189
.73/.684
300/239
79.7%
72.2/86.1
214/255
.711/.693
354/278
78.5%
85.2/100
252/297
.671/.645
396/284
71.7%
95.3/102
282/303
.626/.549
424/290
68.4%
102/104
302/310
.574/.48
425/295
69.4%
102/106
303/315
.504/.428
428/297
69.4%
103/107
305/317
.451/.383
----339/249
73.4%
1.29
.466/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Brodix BB-3Xtra O 24 Deg 351 CNC D & F Alum351/-2.30/1.88119-163/130
79.8%
240/177
73.8%
57.8/63.8
171/189
.758/.684
312/239
76.6%
75.1/86.1
223/255
.739/.693
360/278
77.2%
86.6/100
257/297
.682/.645
393/284
72.3%
94.6/102
280/303
.621/.549
412/290
70.4%
99.2/104
294/310
.558/.48
418/295
70.6%
101/106
298/315
.495/.428
425/297
69.9%
102/107
303/317
.448/.383
----340/249
73.1%
1.21
.466/.381
Brodix BB-3Xtra O 24 Deg 351 CNC I-50 E-50 Alum351/-2.35/1.88119-154/130
84.4%
229/177
77.3%
52.8/63.8
156/189
.708/.684
298/239
80.2%
68.7/86.1
204/255
.691/.693
353/278
78.8%
81.4/100
241/297
.655/.645
400/284
71%
92.2/102
273/303
.618/.549
433/290
67%
99.8/104
296/310
.574/.48
441/295
66.9%
102/106
301/315
.511/.428
443/297
67%
102/107
303/317
.457/.383
----344/249
72.3%
1.26
.476/.381
Brodix BB-3Xtra O 24 Deg 365 CNC I-50 E-50 Alum365/-2.35/1.88119-151/130
86.1%
224/177
79%
51.6/63.8
153/189
.693/.684
294/239
81.3%
67.8/86.1
201/255
.682/.693
351/278
79.2%
80.9/100
240/297
.651/.645
400/284
71%
92.2/102
273/303
.618/.549
433/290
67%
99.8/104
296/310
.574/.48
451/295
65.4%
104/106
308/315
.523/.428
460/297
64.6%
106/107
314/317
.474/.383
----346/249
72%
1.26
.476/.381
Brodix BB-3Xtra O 24 Deg 3v Performance Bad Port Alum355/-2.35/-N/A87/-168/-242/-
55.8
165
.748
304/-
70.1
208
.705
348/-
80.2
238
.646
375/-
86.5
256
.58
397/-
91.5
271
.526
418/-
96.4
286
.485
428/-
98.7
292
.441
433/-
99.8
296
.402
---346
-
1.22
.476
Brodix BB-377 HH 24 Deg Oval CNC I-52 E-55 Alum377/-2.375/1.85N/A-145/122
84.1%
221/190
86%
49.9/70.7
148/209
.676/.746
296/231
78%
66.8/85.9
198/255
.679/.681
353/266
75.4%
79.7/99
236/293
.648/.627
397/287
72.3%
89.6/107
266/316
.607/.564
434/304
70%
98/113
290/335
.569/.512
457/306
67%
103/114
306/337
.524/.451
469/308
65.7%
106/115
314/340
.478/.403
----347/252
72.7%
1.24
.481/.375
Brodix BP HH BB 383 24 Deg Oval CNC I-52 E-55 Alum383/-2.375/1.85119-145/122
84.1%
221/190
86%
49.9/70.7
148/209
.676/.746
296/231
78%
66.8/85.9
198/255
.679/.681
353/266
75.4%
79.7/99
236/293
.648/.627
397/287
72.3%
89.6/107
266/316
.607/.564
434/304
70%
98/113
290/335
.569/.512
457/306
67%
103/114
306/337
.524/.451
469/308
65.7%
106/115
314/340
.478/.403
----347/252
72.7%
1.22
.481/.375
Brodix BP HH BB 383 MC 24 Deg Oval CNC I-55 E-55 25/50 Alum383/-2.40/1.85119-143/122
85.3%
218/169
77.5%
48.2/62.9
143/186
.66/.664
291/211
72.5%
64.3/78.5
191/233
.661/.622
352/247
70.2%
77.8/91.9
231/272
.64/.582
402/270
67.2%
88.9/100
263/298
.609/.53
449/294
65.5%
99.3/109
294/324
.583/.495
470/304
64.7%
104/113
308/335
.534/.448
481/311
64.7%
106/116
315/343
.485/.407
----351/241
68.7%
1.26
.486/.375
Brodix BP HH BB 395 MC 24 Deg Oval CNC I-55 E-55 25/50 Alum395/-2.40/1.85119-141/126
89.4%
217/166
76.5%
48/61.8
142/183
.657/.652
291/208
71.5%
64.3/77.4
191/229
.661/.613
352/244
69.3%
77.8/90.8
231/269
.64/.575
405/266
65.7%
89.5/99
265/293
.613/.522
445/291
65.4%
98.4/108
291/321
.577/.49
469/301
64.2%
104/112
307/332
.533/.443
488/306
62.7%
108/114
320/337
.493/.401
----351/239
67.9%
1.24
.486/.375
Brodix BB-4 24 Deg Alum340/-2.35/1.88134-151/132
87.4%
211/161
76.3%
48.6/58
144/172
.653/.622
261/188
72%
60.2/67.7
178/201
.605/.545
303/216
71.3%
69.9/77.8
207/231
.562/.501
334/236
70.7%
77/85
228/252
.516/.456
361/252
69.8%
83.2/90.8
247/269
.478/.417
------270/198
73.1%
1.06
.476/.381
Brodix BB-4 24 Deg Raised Port MBE SF600 Alum385/-2.375/1.80
4.52
No Pipe
134-148/117
79.1%
224-221/167
75.1%
50.2/65.6
149/194
.681/.674
290-289/211
72.9%
65.3/82.9
194/246
.664/.639
339-340/247
72.8%
76.6/97.1
227/288
.623/.598
394/270
68.5%
88.9/106
264/314
.603/.545
441-428/286
65.8%
98.1/112
291/333
.57/.495
469-449/295
64.3%
104/116
307/343
.527/.447
465-462/298
64.3%
105/117
310/347
.473/.401
464-470/300
64.2%
105/118
312/349
.429/.363
---358/243
68.1%
1.21
.481/.365
Brodix BB-4Xtra 24 Deg M2 Race Systems CNC Alum390/-2.35/1.88
4.50
119-148/122
82.4%
214/161
75.2%
49.3/58
146/172
.662/.622
271/192
70.8%
62.5/69.2
185/205
.629/.557
332/221
66.6%
76.5/79.6
227/236
.616/.513
380/253
66.6%
87.6/91.1
260/270
.588/.489
414/269
65%
95.4/96.9
283/287
.549/.446
431/279
64.7%
99.4/101
294/298
.50/.404
-----313/214
68.4%
1.11
.476/.381
Brodix BB-4Xtra 24 Deg M2 Race Systems CNC Alum390/-2.35/1.90
4.60
119-141/122
86.5%
206/156
75.7%
47.5/55
141/163
.637/.597
275/190
69.1%
63.4/67
188/199
.638/.545
327/222
67.9%
75.4/78.3
223/232
.607/.509
382/245
64.1%
88.1/86.4
261/256
.591/.469
425/263
61.9%
98/92.8
290/275
.563/.431
447/276
61.7%
103/97.3
305/288
.518/.396
-----315/211
66.9%
1.15
.476/.385
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Brodix BB-5 26 Deg Alum387/-2.35/1.90108-108/77
71.3%
150/103
68.7%
34.6/36.3
102/108
.464/.394
203/134
66%
46.8/47.3
139/140
.471/.384
258/167
64.7%
59.5/58.9
176/175
.479/.383
309/200
64.7%
71.2/70.5
211/209
.478/.382
354/222
62.7%
81.6/78.3
242/232
.469/.364
384/238
62%
88.5/83.9
262/249
.445/.341
-----252/163
64.6%
0.99
.476/.385
Brodix BB-5 Sonny's Alum390/-2.35/1.90108-111/74
66.7%
163/116
71.2%
37.6/40.9
111/121
.504/.444
219/153
69.9%
50.5/54
150/160
.508/.439
276/187
67.8%
63.6/66
189/195
.512/.429
321/213
66.4%
74/75.1
219/223
.496/.407
360/233
64.7%
83/82.2
246/243
.477/.382
------242/163
67.3%
0.92
.476/.385
Brodix BB-5 Sonny's Sportsman Alum395/1232.35/1.90123-------405/275
67.9%
93.4/97
277/287
.47/.394
------
-
1.03/2.24
.476/.385
Brodix BB-5 Sonny's Max Flow Alum406/1492.35/1.90113.5-------421/311
73.9%
97.1/110
288/325
.488/.446
439/-
101
300
.453
----430
-
1.08/2.09
.476/.385
Brodix Big Duke Weingartner RacingN/A2.40/1.90
4.50
No Pipe
N/A81/73
90.1%
178/137
77%
253/179
70.8%
55.9/63.1
166/187
.766/.685
296/210
70.9%
65.4/74.1
194/219
.672/.602
345/239
69.3%
76.3/84.3
226/250
.627/.548
380/272
71.6%
84/95.9
249/284
.575/.52
404/302
74.8%
89.3/107
265/316
.524/.495
424/314
74.1%
93.7/111
278/328
.481/.45
433/324
74.8%
95.7/114
284/339
.437/.413
438/331
75.6%
96.8/117
287/346
.398/.38
---350/256
73.2%
-
.486/.385
Brodix Big Duke - PB 1800 18 Deg Alum415/-2.40/1.90
4.60
89-141/126
89.4%
200/166
83%
44.2/58.5
131/173
.606/.635
263/200
76%
58.1/70.5
172/209
.597/.574
322/225
69.9%
71.2/79.4
211/235
.585/.516
370/242
65.4%
81.8/85.4
242/253
.56/.463
407/253
62.2%
90/89.2
267/264
.528/.415
418/257
61.5%
92.4/90.6
274/269
.475/.369
-----303/210
69.3%
1.01
.486/.385
Brodix Big Duke - PB 1800 18 Deg Ported Alum415/-2.40/1.90
4.60
89-165/126
76.4%
242/180
74.4%
53.5/63.5
158/188
.733/.688
318/236
74.2%
70.3/83.2
208/247
.722/.677
388/296
76.3%
85.8/104
254/309
.705/.679
430/313
72.8%
95.1/110
282/327
.651/.599
463/319
68.9%
102/113
303/333
.601/.523
483/338
70%
107/119
316/353
.548/.485
-----356/258
72.6%
1.16
.486/.385
Brodix Big Duke - PB 1801 18 Deg Ported Alum375/-2.40/1.90
4.50
89-162/129
79.6%
245/180
73.5%
54.2/63.5
160/188
.742/.688
312/222
71.2%
69/78.3
204/232
.709/.637
367/269
73.3%
81.1/94.9
240/281
.667/.617
411/301
73.2%
90.9/106
269/315
.622/.576
442/308
69.7%
97.7/109
289/322
.574/.505
463/315
68%
102/111
303/329
.526/.452
-----343/246
71.8%
1.23
.486/.385
Brodix Big Duke - PB 1802 18 Deg Alum456/-2.40/1.90
4.60
91-146/112
76.7%
216/159
73.6%
47.7/56.1
141/166
.654/.608
289/199
68.9%
63.9/70.2
189/208
.656/.571
359/233
64.9%
79.4/82.2
235/243
.652/.535
417/266
63.8%
92.2/93.8
273/278
.631/.509
454/287
63.2%
100/101
297/300
.589/.47
478/300
62.8%
106/106
313/314
.543/.43
495/308
62.2%
109/109
324/322
.50/.393
----357/233
65.3%
1.09
.486/.385
Brodix Big Duke - PB 1802 18 Deg CNC Chamber Alum456/-2.40/1.90N/A-156/135
86.5%
230/180
78.3%
50.8/63.5
151/188
.696/.688
305/219
71.8%
67.4/77.2
200/229
.693/.628
361/252
69.8%
79.8/88.9
236/263
.656/.578
414/294
71%
91.5/104
271/307
.627/.562
453/306
67.5%
100/108
297/320
.588/.502
476/313
65.8%
105/110
312/327
.541/.449
-----342/243
70.9%
1.04
.486/.385
Brodix Big Duke - PB 1803 18 Deg CNC Chamber Alum413/-2.45/1.8695-137/110
80.3%
217/162
74.7%
46/59.6
136/177
.644/.633
296/204
68.9%
62.8/75.1
186/222
.659/.598
362/238
65.7%
76.8/87.6
228/260
.644/.558
418/265
63.4%
88.7/97.5
263/289
.62/.518
464/288
62.1%
98.4/106
292/314
.59/.482
484/320
66.1%
103/118
304/349
.538/.469
490/328
66.9%
104/121
308/358
.484/.427
----359/239
66.8%
1.19
.496/.377
Brodix Big Duke - BP PB 1803 18 Deg CNC Alum410/-2.45/1.8691/95-145/126
86.9%
224/172
76.8%
47.5/63.3
141/188
.664/.672
300/211
70.3%
63.6/77.7
189/230
.667/.618
369/245
66.4%
78.3/90.2
232/267
.657/.574
425/270
63.5%
90.2/99.4
267/294
.63/.527
475/318
66.9%
101/117
299/347
.604/.532
500/338
67.6%
106/124
314/369
.556/.495
515/351
68.2%
109/129
324/383
.509/.457
----369/254
68.8%
1.26
.496/.377
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Brodix Big Duke - KC PB 1803 18 Deg CNC M2 Race Systems Alum410/-2.45/1.8695-138/116
84.1%
218/164
75.2%
46.2/60.4
137/179
.647/.641
300/204
68%
63.6/75.1
189/222
.667/.598
364/235
64.6%
77.2/86.5
229/256
.648/.551
420/266
63.3%
89.1/97.9
264/290
.623/.52
460/294
63.9%
97.6/108
289/321
.585/.492
489/323
66.1%
104/119
307/352
.544/.473
505/343
67.9%
107/126
317/374
.499/.447
----362/243
67.2%
1.23
.496/.377
Brodix Big Duke 12 Deg CNC Slick Rick Racing Heads AlumN/A2.52/1.86
-
No Pipe
N/A--233/168
72.1%
46.7/61.8
138/183
.672/.656
322/225
69.9%
64.6/82.8
191/245
.696/.659
399/293
73.4%
80/108
237/320
.69/.687
468/327
69.9%
93.8/120
278/357
.675/.639
512/340
66.4%
103/125
304/371
.633/.569
535/348
65%
107/128
318/379
.579/.51
550/352
64%
110/130
327/384
.529/.458
556/355
63.8%
111/131
330/387
.481/.416
563/357
63.4%
113/131
334/389
.443/.38
--460/307
66.8%
-
.510/.377
Brodix - KC PB 1600 16 Deg Ported Alum416/-2.45/1.8693-147/113
76.9%
232/177
76.3%
49.2/65.1
146/193
.688/.692
314/224
71.3%
66.6/82.4
197/244
.699/.656
383/274
71.5%
81.2/101
241/299
.682/.642
439/310
70.6%
93.1/114
276/338
.651/.606
482/333
69.1%
102/123
303/363
.613/.558
506/340
67.2%
107/125
318/371
.563/.498
515/345
67%
109/127
324/376
.509/.449
----377/265
70.1%
1.24
.496/.377
Brodix - KC PB 5000 5.0 Inch BS 15 Deg CNC Alum506/-2.52/1.8680-154/116
75.3%
237/172
72.6%
47.5/63.3
141/188
.683/.672
323/219
67.8%
64.8/80.6
192/239
.699/.642
398/263
66.1%
79.8/96.8
236/287
.689/.617
437/297
68%
87.6/109
260/324
.63/.58
506/330
65.2%
101/121
301/360
.625/.553
539/351
65.1%
108/129
320/383
.583/.514
557/364
65.4%
112/134
331/397
.535/.474
----394/264
67%
1.10
.510/.377
Brodix / Sonny's PB 2005 14.5 Deg I-55 E-55 Alum490/-2.52/1.8680-129/111
86%
199/156
78.4%
39.9/57.4
118/170
.574/.61
287/196
68.3%
57.5/72.1
170/214
.621/.574
334/231
69.2%
67/85
198/252
.578/.542
431/258
59.9%
86.4/95
256/281
.621/.504
482/274
56.8%
96.6/101
286/299
.596/.459
517/287
55.5%
104/106
307/313
.559/.421
540/293
54.3%
108/108
321/320
.519/.382
----365/226
61.9%
1.10
.510/.377
Brodix / Sonny's PB 2005 14.5 Deg Minor Port I-55 E-55 Alum490/-2.52/1.8680-153/132
86.3%
241/187
77.6%
48.3/68.8
143/204
.695/.731
323/227
70.3%
64.8/83.5
192/248
.699/.665
395/258
65.3%
79.2/95
235/281
.683/.605
452/289
63.9%
90.6/106
269/315
.652/.565
499/326
65.3%
100/120
296/355
.617/.546
517/338
65.4%
104/124
307/369
.559/.495
540/343
63.5%
108/126
321/374
.519/.447
----390/263
67.3%
1.10
.510/.377
Brodix / Sonny's STS PB 2005 14.5 Deg E-Tulip I-55 E-55 AlumN/A2.52/1.86N/A-144/119
82.6%
222/182
82%
44.5/67
132/198
.64/.711
309/229
74.1%
62/84.3
184/250
.668/.671
384/265
69%
77/97.5
228/289
.664/.621
451/301
66.7%
90.4/111
268/328
.65/.588
505/333
65.9%
101/123
300/363
.624/.558
548/357
65.1%
110/131
326/389
.593/.523
563/362
64.3%
113/133
334/395
.541/.471
----391/269
68.7%
-
.510/.377
Brodix EB 650 AlumN/A2.475/1.92N/A105/88
83.8%
181/130
71.8%
255/173
67.8%
53/59.8
157/177
.749/.655
330/214
64.8%
68.6/73.9
203/219
.727/.608
395/268
67.8%
82.1/92.6
243/274
.696/.609
450/307
68.2%
93.5/106
277/314
.661/.581
482/335
69.5%
100/116
297/343
.607/.543
498/344
69.1%
104/119
307/352
.548/.488
-----370/253
68.4%
-
.501/.389
Brodix PB 1200 12 Deg CNC Alum483/-2.52/1.8667-147/126
85.7%
227/180
79.3%
45.5/66.2
135/196
.655/.703
312/224
71.8%
62.6/82.4
185/244
.675/.656
388/264
68%
77.8/97.2
230/288
.671/.619
460/305
66.3%
92.2/112
273/333
.663/.596
509/319
62.7%
102/117
302/348
.629/.534
545/333
61.1%
109/123
324/363
.589/.488
571/338
59.2%
114/124
339/369
.549/.44
----395/261
66.1%
1.18
.510/.377
Brodix PB 1200 12 Deg CNC Alum483/-2.52/1.8668/72-151/126
83.4%
235/180
76.6%
47.1/66.2
140/196
.678/.703
323/224
69.3%
64.8/82.4
192/244
.699/.656
395/264
66.8%
79.2/97.2
235/288
.683/.619
459/305
66.4%
92/112
273/333
.662/.596
513/319
62.2%
103/117
305/348
.634/.534
549/333
60.7%
110/123
326/363
.594/.488
563/338
60%
113/124
334/369
.541/.44
----399/261
65.5%
1.17
.510/.377
Brodix PB 1201 12 Deg CNC Alum480/-2.45/1.8667-156/122
78.2%
249/176
70.7%
52.8/64.8
156/192
.739/.688
332/231
69.6%
70.4/85
209/252
.739/.677
398/276
69.3%
84.4/102
250/301
.708/.647
460/300
65.2%
97.6/110
289/327
.682/.586
499/303
60.7%
106/112
314/330
.634/.507
522/339
64.9%
111/125
328/370
.581/.497
530/340
64.2%
112/125
333/371
.524/.443
----393/261
66.3%
1.10
.496/.377
Brodix PB 1201 12 Deg CNC Alum480/-2.45/1.8668/72-151/122
80.8%
243/176
72.4%
51.5/64.8
153/192
.721/.688
330/231
70%
70/85
207/252
.734/.677
400/276
69%
84.8/102
251/301
.712/.647
454/300
66.1%
96.3/110
285/327
.673/.586
495/303
61.2%
105/112
311/330
.629/.507
521/339
65.1%
111/125
327/370
.58/.497
533/340
63.8%
113/125
335/371
.527/.443
----391/261
66.7%
1.11
.496/.377
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Brodix KC PB 1202 12 Deg CNC Alum497/-2.48/1.8666/70-154/122
79.2%
247/174
70.4%
51.1/64
152/190
.724/.68
332/229
69%
68.7/84.3
204/250
.73/.671
401/274
68.3%
83/101
246/299
.705/.642
468/303
64.7%
96.9/112
287/330
.686/.592
509/328
64.4%
105/121
312/358
.639/.549
535/338
63.2%
111/124
328/369
.588/.495
553/339
61.3%
114/125
339/370
.54/.442
----400/263
65.9%
1.11
.502/.377
Brodix KC PB 1204 12 Deg CNC Alum510/-2.52/1.8671/75-157/116
73.9%
216/169
78.2%
43.3/62.2
128/184
.623/.66
298/221
74.2%
59.7/81.3
177/241
.645/.648
369/261
70.7%
74/96.1
219/285
.638/.612
434/321
74%
87/118
258/350
.626/.627
489/344
70.3%
98/127
290/375
.604/.576
542/358
66.1%
109/132
322/390
.586/.525
578/370
64%
116/136
343/403
.556/.482
----385/270
70.1%
1.13
.510/.377
Brodix PB 5000 16 Deg 5.0 BS CNC Alum515/-2.52/1.8680-154/116
75.3%
237/172
72.6%
47.5/63.3
141/188
.683/.672
323/219
67.8%
64.8/80.6
192/239
.699/.642
398/263
66.1%
79.8/96.8
236/287
.689/.617
461/297
64.4%
92.4/109
274/324
.665/.58
506/330
65.2%
101/121
301/360
.625/.553
539/351
65.1%
108/129
320/383
.583/.514
557/364
65.4%
112/134
331/397
.535/.474
----397/264
66.5%
1.08
.510/.377
Brodix PB 5001 16 Deg 5.0 BS CNC Alum515/-2.52/1.8680-156/119
76.3%
245/169
69%
49.1/62.2
146/184
.707/.66
338/217
64.2%
67.8/79.9
201/237
.731/.636
415/261
62.9%
83.2/96.1
247/285
.718/.612
471/301
63.9%
94.4/111
280/328
.679/.588
511/343
67.1%
102/126
304/374
.632/.574
545/367
67.3%
109/135
324/400
.589/.538
566/382
67.5%
113/141
336/417
.544/.498
----406/270
66.5%
1.10
.510/.377
Brodix PB 5002 16 Deg 5.0 BS CNC Alum509/-2.52/1.8680-148/113
76.4%
242/167
69%
48.5/61.5
144/182
.698/.652
335/217
64.8%
67.2/79.9
199/237
.725/.636
406/254
62.6%
81.4/93.5
241/277
.703/.595
464/316
68.1%
93/116
276/345
.669/.617
505/348
68.9%
101/128
300/379
.624/.583
535/353
66%
107/130
318/385
.579/.517
546/359
65.8%
109/132
324/391
.525/.468
----398/266
66.9%
1.07
.510/.377
Brodix - Texas Pro Stock Type Ported Slick Rick Racing Heads I-50 E-55 AlumN/A2.40/1.8095-157/126
80.3%
248/160
64.5%
54.8/62.9
162/186
.751/.646
330-329/200
60.7%
72.8/78.6
216/233
.748/.606
402-394/235
59%
88/92.3
261/274
.723/.569
450-438/262
59%
98.1/103
291/305
.672/.529
470-466/278
59.4%
103/109
307/324
.607/.481
485-483/290
59.9%
107/114
317/338
.55/.439
500-488/298
60.3%
109/117
324/347
.499/.401
508-490/303
60.7%
110/119
327/353
.453/.367
510-490/308
61.6%
111/121
327/359
.413/.339
--402/246
61.2%
-
.486/.365
Brodix SR20 Conventional Darin Morgan AlumN/A2.40/1.8096-180-182/132
72.9%
263-266/180
68.1%
58.5/70.7
173/210
.801/.727
346-345/218
63.1%
76.4/85.7
226/254
.785/.66
409-411/257
62.7%
90.6/101
269/299
.745/.623
460-461/288
62.5%
102/113
302/335
.697/.581
488-484/311
64%
107/122
318/362
.631/.538
499-493/331
66.7%
110/130
325/385
.563/.501
503-502/340
67.7%
111/134
329/396
.507/.458
509/344
67.6%
113/135
333/401
.462/.417
---406/267
65.7%
-
.486/.365
Canfield 305 Alum CHP305/-2.25/1.88
4.25
Pipe
11475/61
81.3%
161/115
71.4%
215/163
75.8%
54.1/58.7
160/174
.694/.63
257/199
77.4%
64.6/71.7
192/212
.623/.577
303/228
75.2%
76.2/82.1
226/243
.587/.529
328/251
76.5%
82.5/90.4
244/268
.53/.485
339/265
78.2%
85.3/95.5
253/283
.469/.439
332/273
82.2%
83.5/98.3
247/291
.402/.396
-----276/213
77.2%
1.11
.456/.381
Canfield 310 Alum310/1002.25/1.88113/
119/
125
72/74
102%
138/123
89.1%
204/176
86.3%
51.3/63.4
152/188
.659/.68
266/205
77.1%
66.9/73.8
198/219
.644/.594
318/237
74.5%
80/85.4
237/253
.616/.55
347/260
74.9%
87.3/93.7
259/278
.56/.503
353/273
77.3%
88.8/98.3
263/291
.489/.452
355/284
80%
89.3/102
265/303
.43/.412
-----283/223
78.6%
1.15/2.84
.456/.381
Canfield 310 VJ Bowl work Chad Speier Alum315/-2.25/1.88N/A-155-153/-217/-
54.6
162
.701
282-286/-
71.4
212
.688
329-330/-
82.9
246
.639
349-339/-
86.5
256
.556
352-340/-
87
258
.479
355-344/-
87.9
260
.423
343-353/-
87.5
259
.375
341-355/-
87.5
259
.337
---302
-
1.11
.456/.381
Canfield 310 Ported CFM Technologies AlumN/A2.25/1.88N/A-180/133
73.9%
259/182
70.3%
65.1/65.6
193/194
.837/.704
311/221
71.1%
78.2/79.6
232/236
.753/.641
348/250
71.8%
87.5/90.1
259/267
.674/.58
367/279
76%
92.3/101
273/298
.593/.539
373/295
79.1%
93.8/106
278/315
.516/.489
------306/227
74%
-
.456/.381
Canfield 310 Ported Jim V AlumN/A2.25/1.88
-
No Pipe
N/A-152/132
86.8%
233/186
79.8%
58.6/67
174/199
.753/.719
295/228
77.3%
74.2/82.1
220/243
.715/.661
344/256
74.4%
86.5/92.2
256/273
.667/.594
371/280
75.5%
93.3/101
276/299
.599/.541
380/310
81.6%
95.6/112
283/331
.526/.514
-/326-/330----296/232
78.4%
-
.456/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Canfield 310 Ported Foxwell Motorsports AlumN/A2.25/1.88118-155-153/117
76%
221/158
71.5%
55.6/56.9
165/169
.714/.611
283-279/198
70.5%
70.7/71.3
209/211
.681/.574
335-321/232
70.7%
82.5/83.6
244/248
.636/.538
369-347/258
72.1%
90/92.9
267/275
.578/.499
386-367/279
74.1%
94.7/101
281/298
.521/.462
379-377/291
77%
95.1/105
282/311
.458/.422
-----300/219
73.1%
-
.456/.381
Canfield 310 Ported Foxwell Motorsports AlumN/A2.30/1.88
-
2.25" Pipe
N/A-161-159/113
70.6%
226-223/166
73.9%
54/59.8
160/177
.709/.642
292-289/201
69.2%
69.9/72.4
207/215
.688/.583
347-332/249
73.3%
81.7/89.7
242/266
.644/.578
386-360/280
75.1%
89.8/101
266/299
.589/.541
401-382/300
76.6%
94.2/108
279/320
.53/.497
404-395/316
79.1%
96.2/114
285/337
.473/.458
412-404/326
79.9%
98.2/117
291/348
.43/.42
----323/244
75.4%
-
.466/.381
Canfield Ported Foxwell Motorsports I-45 Alum325/-2.30/1.88
-
2 1/4 Pipe
N/A-158-151/116
75.1%
225-219/158
71.2%
53.4/56.9
158/169
.701/.611
290-283/195
68.1%
69/70.2
204/208
.679/.565
338-327/230
69.2%
80/82.9
237/245
.63/.533
373-352/256
70.6%
87.2/92.2
259/273
.573/.495
381-380/276
72.5%
91.6/99.4
271/295
.515/.457
390/287
73.6%
93.9/103
278/306
.462/.416
395-393/295
74.9%
94.8/106
281/315
.415/.38
----315/227
71.9%
1.21
.466/.381
Canfield Ported Foxwell Motorsports I-45 Alum335/-2.30/1.88N/A-164-163/-231-230/-
55.5
164
.728
297-296/-
71.4
211
.703
348-330/-
81.6
242
.643
381-358/-
88.9
264
.584
402-382/-
94.3
280
.531
410-397/-
97.1
288
.478
415-407/-
98.9
293
.433
419-415/-
100
297
.395
---336
-
1.24
.466/.381
Canfield Ported Foxwell Motorsports I-45 AlumN/A2.30/1.88
4.60
N/A-166/121
72.9%
245-247/170
69.1%
59.2/61.2
175/181
.777/.657
306-312/209
67.6%
74.4/75.3
220/223
.732/.606
353-346/243
69.5%
84.1/87.5
249/259
.663/.564
386-368/274
72.7%
90.7/98.7
269/292
.596/.53
406-387/300
75.7%
95.4/108
283/320
.537/.497
415-406/316
77%
98.8/114
293/337
.486/.458
423-415/330
78.8%
101/119
299/352
.441/.425
429-419/340
80.2%
102/122
302/363
.402/.394
---344/256
74.4%
-
.466/.381
Canfield 310 Ported Jeff Birtchell AlumN/A2.25/1.88N/A-186/140
75.3%
258/185
71.7%
64.9/66.6
192/197
.833/.715
313/226
72.2%
78.7/81.4
233/241
.758/.655
369/264
71.5%
92.8/95.1
275/282
.715/.612
397/289
72.8%
99.8/104
296/308
.641/.559
406/312
76.8%
102/112
303/333
.562/.517
411/316
76.9%
103/114
306/337
.498/.458
-----334/247
74%
-
.456/.381
Canfield Ported Champion Racing Heads SF600 AlumN/A2.25/1.88
4.40
N/A-186/143
76.9%
261/199
76.2%
65.6/71.7
194/212
.843/.769
313/246
78.6%
78.7/88.6
233/263
.758/.713
348/276
79.3%
87.5/99.4
259/295
.674/.64
357/292
81.8%
89.8/105
266/312
.577/.564
366/299
81.7%
92.1/108
273/319
.507/.495
------305/243
79.5%
-
.456/.381
Canfield 320 Weingartner Racing I-BC E-Tuliped Alum315/-2.25/1.88
4.31
No Pipe
N/A68-69/60
87.6%
135-133/134
100%
201-199/176
88%
50.3/63.4
149/188
.646/.68
259-260/206
79.4%
65.3/74.2
193/220
.629/.597
306-294/233
77.7%
75.5/83.9
224/249
.581/.54
326-305/245
77.7%
79.3/88.3
235/262
.51/.474
352-340/248
71.7%
87/89.3
258/265
.479/.411
333-328/251
75.9%
83.1/90.4
246/268
.40/.364
330-325/257
78.5%
82.4/92.6
244/274
.353/.331
323-319/262
81.6%
80.7/94.4
239/280
.311/.304
---282/224
79.4%
1.10
.456/.381
Canfield 350 Alum350/-2.30/1.88
-
Pipe
113/
119/
125
82/74
90.2%
176/123
69.9%
250/175
70%
60.2/63
178/187
.79/.676
313/213
68.1%
75.3/76.7
223/227
.742/.618
350/256
73.1%
84.2/92.2
250/273
.664/.594
367/284
77.4%
88.3/102
262/303
.58/.549
376/309
82.2%
90.5/111
268/330
.509/.512
380/320
84.2%
91.5/115
271/342
.45/.464
381/322
84.5%
91.7/116
272/344
.401/.415
----324/250
77.2%
1.09
.466/.381
Canfield CFE Ported AlumN/A-N/A-------420/-
-
------
Canfield 310 2012 Foxwell Motorsports AlumN/A2.25/1.88N/A-165/122
73.9%
235-239/170
71.7%
59.6/61.2
177/181
.765/.657
301-294/212
71.3%
74.8/76.4
222/226
.721/.615
340-321/240
72.6%
83.1/86.5
246/256
.64/.557
358-339/261
74.9%
87.6/94
260/279
.563/.504
356-341/274
78.6%
87.6/98.7
260/292
.482/.454
351-348/281
80.4%
87.9/101
260/300
.423/.407
-----297/223
75.1%
-
.456/.381
Canfield 310 2012 Foxwell Motorsports CNC bowl blend Alum312-309/-2.25/1.88N/A-170-172/123
71.9%
246-244/170
69.4%
61.6/61.2
183/181
.791/.657
311-295/212
70%
76.2/76.4
226/226
.734/.615
353-329/245
71.8%
85.8/88.3
254/262
.661/.568
373-354/274
75.4%
91.4/98.7
271/292
.587/.53
373-364/295
80.1%
92.7/106
275/315
.51/.489
373-370/309
83.2%
93.4/111
277/330
.45/.448
-----309/233
75.2%
-
.456/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
CFE/BMF 310 Alum317/1502.30/1.88116-------397/304
76.6%
95.6/110
283/324
.47/.441
------
-
1.25/2.03
.466/.381
CFE 366310 Alum310/1502.30/1.88119--259/174
67.2%
62.3/62.7
185/186
.818/.673
325/212
65.2%
78.2/76.4
232/226
.77/.615
374/250
66.8%
90/90.1
267/267
.709/.58
386/277
71.8%
92.9/99.8
275/296
.61/.535
393/292
74.3%
94.6/105
280/312
.532/.484
394/304
77.2%
94.8/110
281/324
.467/.441
-----355/252
70.8%
1.27/2.03
.466/.381
DART N.E. Mod. Oval Full Port Back Cut SF600307-311/ 1452.25/1.88
4.44
No Pipe
117-153-156/122
79%
223-224/163
72.9%
56.2/58.7
167/174
.722/.63
281-284/218
77.2%
71/78.5
211/233
.684/.632
314-330/260
80.7%
81/93.7
240/278
.624/.603
340-362/274
78.1%
88.3/98.7
262/292
.567/.53
356-370/283
78%
91.3/102
271/302
.502/.469
364-374/293
79.4%
92.8/106
275/313
.447/.425
-----295/230
78.1%
-
.456/.381
DART 265 Oval Super Mod. Alum275/1282.30/1.88
4.50
No Pipe
N/A-156/132
84.6%
216/169
78.2%
52/60.9
154/180
.682/.653
274/203
74.1%
65.9/73.1
195/217
.649/.589
310/230
74.2%
74.6/82.9
221/245
.588/.533
324/247
76.2%
78/89
231/264
.512/.477
329/255
77.5%
79.2/91.9
235/272
.446/.422
------268/206
76.8%
1.20/1.99
.466/.381
DART 265 CNC Oval Super Mod. Alum298/1432.30/1.88
4.50
No Pipe
N/A-157/142
90.4%
222/190
85.6%
53.4/68.4
158/203
.701/.734
274/230
83.9%
65.9/82.9
195/245
.649/.667
309/263
85.1%
74.4/94.7
220/281
.586/.61
365/284
77.8%
87.9/102
260/303
.577/.549
380/294
77.4%
91.5/106
271/314
.515/.487
------285/234
82.2%
1.28/2.06
.466/.381
DART 275 Oval CCM Alum275/-2.25/1.88
-
No Pipe
11968/68
100%
151/115
76.2%
215/155
72.1%
54.1/55.8
160/165
.694/.599
259/192
74.1%
65.1/69.2
193/205
.627/.557
293/223
76.1%
73.7/80.3
218/238
.568/.517
315/244
77.5%
79.2/87.9
235/260
.509/.472
310/259
83.5%
78/93.3
231/276
.429/.429
------257/198
77%
1.15
.456/.381
DART 308 Iron Eagle308/1292.25/1.88
4.50
No Pipe
119-157/136
86.6%
232/175
75.4%
58.3/63
173/187
.749/.676
291/210
72.2%
73.2/75.7
217/224
.705/.609
325/233
71.7%
81.7/83.9
242/249
.63/.54
347/249
71.8%
87.3/89.7
259/266
.56/.481
359/258
71.9%
90.3/92.9
268/275
.497/.427
363/266
73.3%
91.3/95.8
271/284
.44/.386
-----296/218
73.6%
1.18/2.06
.456/.381
DART 308 Eagle David Vizard Iron308/1292.25/1.88119--204-201/173
85.4%
50.9/62.3
151/185
.654/.669
262-265/200
75.9%
66.3/72
196/213
.638/.58
306/226
73.9%
77/81.4
228/241
.593/.524
310-303/250
81.6%
77.1/90.1
228/267
.495/.483
353-350/259
73.7%
88.4/93.3
262/276
.487/.429
363-360/269
74.4%
90.9/96.9
269/287
.438/.39
-----299/230
76.9%
1.17/2.09
.456/.381
DART 308 Ported Eagle David Vizard IronN/A2.25/1.88119--229-222/179
79.4%
56.7/64.5
168/191
.728/.692
262-272/222
83.1%
67.2/80
199/237
.647/.644
300-303/250
82.9%
75.8/90.1
225/267
.584/.58
335-303/271
85%
80.2/97.6
238/289
.515/.524
370-354/280
77.3%
91/101
270/299
.501/.464
383/289
75.5%
96.3/104
285/308
.464/.419
-----310/249
80.2%
-
.456/.381
DART 308 Iron Eagle FlowMotion Performance SF-600 Ported Jim V - Marine324/1382.30/1.88
4.60
N/A--218-221/180
82%
52.8/64.8
157/192
.694/.696
292-287/242
83.6%
69.7/87.2
206/258
.686/.702
341-332/274
81.4%
81/98.7
240/292
.638/.636
376-359/295
80.3%
88.5/106
262/315
.581/.57
393-380/303
78.4%
93/109
276/323
.523/.502
396/307
77.5%
95.3/111
282/328
.469/.445
-----333/267
80.2%
1.22/2.22
.466/.381
DART 308 Super Mod.316/1282.25/1.88
4.50
No Pipe
N/A-153/132
86.3%
221/169
76.5%
55.6/60.9
165/180
.714/.653
275/203
73.8%
69.2/73.1
205/217
.666/.589
318/230
72.3%
80/82.9
237/245
.616/.533
348/247
71%
87.5/89
259/264
.562/.477
367/255
69.5%
92.3/91.9
273/272
.508/.422
------280/206
73.5%
1.16/1.99
.456/.381
DART 320 Out of Box Bill Jones Alum327/1282.30/1.88N/A73/74
101%
143/148
103%
208/187
89.9%
50.1/67.4
148/200
.657/.723
246/217
88.2%
59.2/78.2
175/232
.583/.629
290/238
82.1%
69.8/85.7
207/254
.55/.552
320/247
77.2%
77/89
228/264
.506/.477
-------241/207
85.9%
0.98/1.93
.466/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
DART 320 Super Mod. Alum327/1282.30/1.88
4.50
No Pipe
N/A-152/132
86.8%
216/169
78.2%
52/60.9
154/180
.682/.653
274/203
74.1%
65.9/73.1
195/217
.649/.589
316/230
72.8%
76.1/82.9
225/245
.599/.533
338/247
73.1%
81.4/89
241/264
.534/.477
351/255
72.6%
84.5/91.9
250/272
.475/.422
------275/206
75%
1.07/1.99
.466/.381
DART 320 CNC Super Mod. Alum321/ 123.12.25/1.88
-
No Pipe
119.1-157/126
80.3%
230/165
71.7%
57.8/59.4
171/176
.743/.638
284/199
70.1%
71.4/71.7
212/212
.688/.577
319/224
70.2%
80.2/80.7
238/239
.618/.52
335/236
70.4%
84.3/85
250/252
.541/.456
339/242
71.4%
85.3/87.2
253/258
.469/.401
339/246
72.6%
85.3/88.6
253/263
.411/.357
-----286/205
71.8%
1.06/2.00
.456/.381
DART 320 CNC Super Mod. Alum346/1432.30/1.88
4.50
No Pipe
119.1-157/142
90.4%
221/190
86%
53.2/68.4
158/203
.698/.734
280/230
82.1%
67.4/82.9
200/245
.664/.667
326/263
80.7%
78.5/94.7
232/281
.618/.61
365/284
77.8%
87.9/102
260/303
.577/.549
370/294
79.5%
89.1/106
264/314
.501/.487
------287/234
81.6%
1.07/2.06
.466/.381
DART 335 CNC Weingartner Racing AlumN/A2.30/1.88
4.625
No Pipe
N/A66-54/54
90%
125-122/109
88.3%
203-195/151
75.9%
47.9/54.4
142/161
.629/.584
276-258/180
67.4%
64.3/64.8
190/192
.633/.522
322-309/223
70.7%
75.9/80.3
225/238
.598/.517
365-340/250
70.9%
84.8/90.1
251/267
.557/.483
395-365/266
70%
91.5/95.8
271/284
.515/.441
391-380/276
71.6%
92.8/99.4
275/295
.457/.40
380-373/281
74.6%
90.6/101
269/300
.397/.362
383-375/284
74.9%
91.2/102
270/303
.359/.329
---309/224
72.7%
-
.466/.381
DART 330 Iron Eagle Pro CNC330/-2.30/1.88
-
No Pipe
126-157/136
86.6%
232/175
75.4%
55.8/63
165/187
.733/.676
291/210
72.2%
70/75.7
208/224
.69/.609
325/233
71.7%
78.2/83.9
232/249
.616/.54
347/249
71.8%
83.5/89.7
247/266
.548/.481
359/258
71.9%
86.4/92.9
256/275
.486/.427
363/266
73.3%
87.4/95.8
259/284
.43/.386
-----296/218
73.6%
1.10
.466/.381
DART 345 Iron Eagle345/1292.30/1.88
4.50
No Pipe
119-158/136
86.1%
228/175
76.8%
54.9/63
163/187
.72/.676
289/210
72.7%
69.6/75.7
206/224
.685/.609
327/233
71.3%
78.7/83.9
233/249
.62/.54
358/249
69.6%
86.2/89.7
255/266
.566/.481
378/258
68.3%
91/92.9
270/275
.512/.427
390/266
68.2%
93.9/95.8
278/284
.462/.386
-----304/218
71.8%
1.13/2.06
.466/.381
DART 345 Eagle David Vizard Iron345/1292.30/1.8811979/56
70.9%
162-163/115
70.8%
249/167
67.1%
59.9/60.2
178/178
.787/.646
314-315/205
65.2%
75.7/73.8
224/219
.745/.594
356-350/225
63.7%
85/81.1
252/240
.669/.522
379-371/238
63.5%
90.3/85.7
267/254
.592/.46
384-377/248
65.2%
91.6/89.3
271/265
.515/.411
387-379/255
66.6%
92.2/91.9
273/272
.454/.37
-----317/208
65.5%
1.11/1.98
.466/.381
DART 345 Eagle Basic Ported David Vizard Iron345/1292.30/1.8811979/56
70.9%
165-166/118
71.3%
255-254/177
69.5%
61.3/63.8
181/189
.804/.684
325-324/228
70.3%
78.1/82.1
231/243
.769/.661
361-360/251
69.6%
86.8/90.4
257/268
.683/.582
387-382/270
70.2%
92.5/97.3
274/288
.607/.522
399-389/292
74.1%
94.8/105
281/312
.534/.484
406-394/299
74.8%
96.3/108
285/319
.474/.433
-----326/234
71.6%
1.16/2.32
.466/.381
DART 360 16500000 Kendrick Auto AlumN/A2.25/1.911975/68
90.7%
136/99
72.8%
184/125
67.9%
46.3/44.1
137/131
.594/.478
220/152
69.1%
55.3/53.6
164/159
.533/.436
261/181
69.3%
65.6/63.8
194/189
.506/.415
294/195
66.3%
73.9/68.8
219/204
.475/.373
313/202
64.5%
78.7/71.2
233/211
.433/.331
------235/159
67.8%
-
.456/.385
DART 360 16500000 Ported Kendrick Auto AlumN/A2.25/1.911984/73
86.9%
157/108
68.8%
223/149
66.8%
56.1/52.6
166/156
.72/.57
270/181
67%
67.9/63.8
201/189
.654/.519
308/210
68.2%
77.5/74.1
230/219
.597/.482
348/237
68.1%
87.5/83.6
259/248
.562/.453
386/259
67.1%
97.1/91.3
288/271
.534/.425
------282/191
67.6%
-
.456/.385
DART 360 Super Mod.355/ 124.62.30/1.88
-
No Pipe
114.1-152/126
82.9%
220/165
75%
53/59.4
157/176
.695/.638
277/199
71.8%
66.7/71.7
198/212
.656/.577
324/224
69.1%
78/80.7
231/239
.614/.52
354/236
66.7%
85.2/85
252/252
.559/.456
369/242
65.6%
88.8/87.2
263/258
.50/.401
373/246
66%
89.8/88.6
266/263
.442/.357
-----296/205
69.5%
1.05/1.97
.466/.381
DART 360 Super Mod. Alum366/1282.30/1.88
4.50
No Pipe
N/A-154/132
85.7%
220/169
76.8%
53/60.9
157/180
.695/.653
279/203
72.8%
67.2/73.1
199/217
.661/.589
321/230
71.7%
77.3/82.9
229/245
.609/.533
346/247
71.4%
83.3/89
247/264
.547/.477
370/255
68.9%
89.1/91.9
264/272
.501/.422
------282/206
73.1%
1.01/1.99
.466/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
DART 360 CNC Super Mod. Alum389/1432.30/1.88
4.50
No Pipe
119-157/142
90.4%
223/190
85.2%
53.7/68.4
159/203
.705/.734
284/230
81%
68.4/82.9
203/245
.673/.667
337/263
78%
81.1/94.7
240/281
.639/.61
374/284
75.9%
90/102
267/303
.591/.549
393/294
74.8%
94.6/106
280/314
.532/.487
------295/234
79.4%
1.01/2.06
.466/.381
DART 360 Out of Box Weingartner Racing AlumN/A2.30/1.85
4.50
No Pipe
N/A77/66
85.7%
154/107
69.5%
234/147
62.8%
56.3/54.7
167/162
.739/.577
288/183
63.5%
69.3/68.1
205/202
.682/.539
326/210
64.4%
78.5/78.1
232/231
.618/.495
360/230
63.9%
86.6/85.6
257/254
.569/.452
363/244
67.2%
87.4/90.8
259/269
.492/.411
368/250
67.9%
88.6/93
262/276
.436/.368
-----299/196
65.5%
-
.466/.375
DART 360 Out of Box Weingartner Racing Brez AlumN/A2.30/1.85
4.31
No Pipe
N/A75/66
88%
166/107
64.5%
235/147
62.6%
56.6/54.7
168/162
.743/.577
283/183
64.7%
68.1/68.1
202/202
.671/.539
327/210
64.2%
78.7/78.1
233/231
.62/.495
351/230
65.5%
84.5/85.6
250/254
.555/.452
365/244
66.8%
87.9/90.8
260/269
.494/.411
378/257
68%
91/95.6
270/283
.448/.379
-----301/197
65.5%
-
.466/.375
DART 360 CNC Rons Porting Service AlumN/A2.30/1.90
-
No Pipe
N/A-185/142
76.8%
260/183
70.4%
62.6/64.5
185/191
.822/.70
321/214
66.7%
77.3/75.5
229/224
.761/.614
357/251
70.3%
85.9/88.5
255/262
.677/.576
389/282
72.5%
93.6/99.5
277/295
.615/.539
406/298
73.4%
97.7/105
290/311
.55/.488
420/307
73.1%
101/108
300/321
.498/.44
429/318
74.1%
103/112
306/332
.452/.405
----346/249
72.1%
-
.466/.385
DART 370 CNC Oval Full Port Back Cut SF600370/1522.30/1.88
4.50
No Pipe
125-176-175/135
76.9%
243-238/187
77.8%
57.9/67.4
172/200
.76/.723
305-302/231
76.1%
73/83.2
216/247
.719/.67
348-350/280
80.2%
84/101
249/299
.662/.649
381-385/292
76.2%
92.2/105
273/312
.605/.564
403-411/310
76.2%
98/112
290/331
.551/.514
410-420/319
76.9%
99.9/115
296/340
.492/.462
-----325/251
77.1%
1.12/2.10
.466/.381
DART Conventional 22.25 Deg - Texas Pro Stock CNC Darin Morgan SF600 AlumN/A2.375/1.85
-
No Pipe
N/A-135-138/-228/-
51.5
152
.698
312-315/-
70.8
210
.719
375-378/-
85
252
.691
427-431/-
96.8
287
.656
459-471/-
105
311
.61
477-489/-
109
323
.554
480-501/-
111
328
.50
485-507/-
112
332
.455
---380
-
-
.481/.375
DART 360 Rolled 22 Deg - 2009 Texas Pro Stock CNC Darin Morgan SF600 AlumN/A2.375/1.85
-
No Pipe
N/A-141-138/-228/-
51.5
152
.698
315/-
71.1
211
.723
384-378/-
86
255
.70
426-431/-
96.7
287
.656
456-471/-
105
310
.608
465-489/-
108
319
.547
477-501/-
110
327
.499
480-507/-
111
330
.453
---379
-
-
.481/.375
DART 360 Rolled 22 Deg - 2010 Texas Pro Stock CNC Darin Morgan SF600 AlumN/A2.375/1.85
-
No Pipe
N/A-149-150/-237/-
53.5
159
.725
315/-
71.1
211
.723
384-385/-
86.8
257
.706
434-439/-
98.5
292
.668
463-480/-
106
315
.618
481-504/-
111
329
.565
495-510/-
113
336
.513
501-516/-
115
340
.467
---389
-
-
.481/.375
DART PRO1 275 Alum275/-2.25/1.88
-
No Pipe
121-154/136
88.3%
225/175
77.8%
56.6/63
168/187
.727/.676
284/210
73.9%
71.4/75.7
212/224
.688/.609
318/233
73.3%
80/83.9
237/249
.616/.54
341/249
73%
85.8/89.7
254/266
.551/.481
352/258
73.3%
88.5/92.9
262/275
.487/.427
------279/210
75.3%
1.28
.456/.381
DART PRO1 Ported BES Alum333/-2.30/1.88129.7-166/136
81.9%
234/186
79.5%
56.3/67
167/199
.739/.719
296/232
78.4%
71.2/83.6
211/248
.701/.673
345/262
75.9%
83/94.4
246/280
.654/.608
373/290
77.7%
89.8/104
266/310
.589/.561
388/309
79.6%
93.4/111
277/330
.525/.512
392/326
83.2%
94.3/117
280/348
.464/.473
398/344
86.4%
95.8/124
284/367
.419/.443
----324/261
80.4%
1.20
.466/.381
DART PRO1 310 Alum310/1292.25/1.88
4.50
No Pipe
121-147/137
93.2%
219/175
79.9%
55.1/63
163/187
.707/.676
275/210
76.4%
69.2/75.7
205/224
.666/.609
318/233
73.3%
80/83.9
237/249
.616/.54
347/249
71.8%
87.3/89.7
259/266
.56/.481
364/258
70.9%
91.5/92.9
271/275
.504/.427
369/266
72.1%
92.8/95.8
275/284
.447/.386
-----291/218
74.9%
1.19/2.06
.456/.381
DART PRO1 310 Ported Jim V Alum320/-2.25/1.88
-
No Pipe
N/A-149/130
87.2%
225/171
76%
56.6/61.6
168/183
.727/.661
295/206
69.8%
74.2/74.2
220/220
.715/.597
348/256
73.6%
87.5/92.2
259/273
.674/.594
380/286
75.3%
95.6/103
283/305
.614/.553
394/300
76.1%
99.1/108
294/320
.545/.497
------299/225
75.3%
1.23
.456/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
DART PRO1 325 Alum325/1292.25/1.88
4.50
No Pipe
121-147/137
93.2%
223/175
78.5%
56.1/63
166/187
.72/.676
281/210
74.7%
70.7/75.7
209/224
.681/.609
326/233
71.5%
82/83.9
243/249
.632/.54
353/249
70.5%
88.8/89.7
263/266
.57/.481
371/258
69.5%
93.3/92.9
276/275
.514/.427
376/266
70.7%
94.6/95.8
280/284
.455/.386
-----297/218
73.6%
1.16/2.06
.456/.381
DART PRO1 335 CNC Alum335/1382.30/1.88
4.50
No Pipe
N/A-174/136
78.2%
245/178
72.7%
59/64.1
175/190
.774/.688
306/235
76.8%
73.7/84.7
218/251
.725/.681
353/265
75.1%
85/95.5
252/283
.669/.615
383/282
73.6%
92.2/102
273/301
.605/.545
401/296
73.8%
96.5/107
286/316
.543/.49
406/303
74.6%
97.7/109
290/323
.481/.439
-----324/242
74.7%
1.21/2.20
.466/.381
DART PRO1 345 Alum345/1292.30/1.88
4.50
No Pipe
121-143/136
95.1%
214/175
81.8%
51.5/63
153/187
.676/.676
272/210
77.2%
65.5/75.7
194/224
.645/.609
321/233
72.6%
77.3/83.9
229/249
.609/.54
359/249
69.4%
86.4/89.7
256/266
.567/.481
384/258
67.2%
92.4/92.9
274/275
.52/.427
397/266
67%
95.6/95.8
283/284
.47/.386
-----299/218
73.1%
1.15/2.06
.466/.381
DART PRO1 355 CNC Alum355/1382.30/1.88
4.50
No Pipe
N/A-177/136
76.8%
251/178
70.9%
60.4/64.1
179/190
.793/.688
310/235
75.8%
74.6/84.7
221/251
.735/.681
360/265
73.6%
86.6/95.5
257/283
.682/.615
399/282
70.7%
96/102
285/301
.63/.545
423/296
70%
102/107
302/316
.573/.49
426/303
71.1%
103/109
304/323
.505/.439
-----335/242
72.3%
1.20/2.20
.466/.381
DART PRO1 355 CNC David Vizard AlumN/A2.30/1.8811977/58
75.3%
171/123
71.9%
253/175
69.2%
60.9/63
180/187
.799/.676
325/225
69.2%
78.2/81.1
232/240
.77/.652
360/250
69.4%
86.6/90.1
257/267
.682/.58
378-373/272
72.4%
90.4/98
268/290
.593/.526
400-388/292
74.1%
94.8/105
281/312
.534/.484
414-395/303
74.9%
97.4/109
288/323
.479/.439
423-399/306
74.5%
98.9/110
293/327
.433/.394
----337/243
72.2%
-
.466/.381
DART 355 CNC Foxwell Motorsports AlumN/A2.30/1.88
4.50
N/A-154-156/117
75.5%
223-226/163
72.6%
54/58.7
160/174
.709/.63
293-290/227
77.9%
70.2/81.8
208/242
.691/.658
338-333/266
79.3%
80.8/95.8
239/284
.636/.617
375-366/288
77.7%
89.2/104
264/307
.585/.557
401-383/302
77%
94.3/109
280/322
.531/.50
409-396/307
76.3%
96.9/111
287/328
.477/.445
417-407/321
77.9%
99.2/116
294/343
.434/.414
425-417/331
78.6%
101/119
300/353
.399/.384
---334/258
77.3%
-
.466/.381
DART PRO2 Ported SF600 Alum380/1442.30/1.88119-176/134
76.1%
239/178
74.5%
57.5/64.1
170/190
.755/.688
304/223
73.4%
73.2/80.3
217/238
.72/.647
346/274
79.2%
83.3/98.7
247/292
.656/.636
378/300
79.4%
91/108
270/320
.597/.58
402/318
79.1%
96.8/115
287/339
.544/.527
420/330
78.6%
101/119
300/352
.498/.478
430/338
78.6%
103/122
307/361
.453/.436
438/346
79%
105/125
312/369
.415/.401
---348/271
77.9%
1.15/2.40
.466/.381
DART SR2 - Texas Pro Stock Ported Slick Rick Racing Heads AlumN/A2.425/-N/A--240/-
52
154
.719
322/-
69.7
207
.724
392/-
84.9
251
.705
449/-
97.2
288
.673
488/-
106
313
.627
497/-
108
319
.559
510/-
110
327
.509
518/-
112
332
.466
525/-
114
337
.429
--438
-
-
.491
DART Big M Super Mod. Ported Alum411/1472.35/1.88
4.60
No Pipe
N/A-160/124
77.5%
223/159
71.3%
51.4/57.3
152/170
.69/.615
285/196
68.8%
65.7/70.6
195/209
.661/.568
336/243
72.3%
77.5/87.5
230/259
.623/.564
377/268
71.1%
86.9/96.5
258/286
.583/.518
401/283
70.6%
92.5/102
274/302
.531/.469
415/295
71.1%
95.7/106
283/315
.481/.428
-----314/224
71.4%
1.01/2.01
.476/.381
DART Big M Super Mod. Ported Full Polish Alum411/1472.35/1.88
4.60
No Pipe
N/A-161/124
77%
235/159
67.7%
54.2/57.3
161/170
.727/.615
302/196
64.9%
69.6/70.6
206/209
.70/.568
357/243
68.1%
82.3/87.5
244/259
.662/.564
394/268
68%
90.8/96.5
269/286
.609/.518
418/283
67.7%
96.4/102
286/302
.554/.469
429/295
68.8%
98.9/106
293/315
.498/.428
-----328/224
68.3%
1.04/2.01
.476/.381
DART 18 Deg Oval Alum330/1522.25/1.84
-
No Pipe
98-190/120
63.2%
254/164
64.6%
63.9/61.7
189/183
.82/.648
318/191
60.1%
80/71.8
237/213
.77/.566
377/222
58.9%
94.8/83.5
281/247
.731/.526
404/257
63.6%
102/96.7
301/286
.652/.508
412/301
73.1%
104/113
307/335
.57/.51
413/301
72.9%
104/113
308/335
.50/.446
-----338/222
65.7%
1.25/1.98
.456/.373
DART 18 Deg Oval CNC Alum383/1522.35/1.84
-
No Pipe
102-162/136
84%
236/177
75%
54.4/66.6
161/197
.73/.699
314/216
68.8%
72.4/81.2
215/241
.728/.64
376/254
67.6%
86.7/95.5
257/283
.698/.602
420/289
68.8%
96.8/109
287/322
.649/.571
444/316
71.2%
102/119
303/352
.588/.535
450/330
73.3%
104/124
307/368
.522/.489
-----343/245
71.5%
1.17/2.17
.476/.373
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
DART Big Chief 18 Deg PRO1 Alum424/1852.40/1.90
-
No Pipe
N/A-158/138
87.3%
222/185
83.3%
49.1/65.2
145/193
.672/.708
284/229
80.6%
62.8/80.8
186/239
.645/.657
345/267
77.4%
76.3/94.2
226/279
.627/.613
390/293
75.1%
86.2/103
255/306
.59/.56
420/30
7.19%
92.8/10.6
275/31.4
.545/4.96
431/305
70.8%
95.3/108
282/319
.489/.437
437/309
70.7%
96.6/109
286/323
.441/.394
----336/220
65.4%
1.03/1.67
.486/.385
DART Late Big Chief 18 Deg CNC Super Mod. Alum402/1752.40/1.90
4.60
No Pipe
N/A-158/154
97.5%
234/211
90.2%
51.7/74.4
153/221
.709/.807
302/266
88.1%
66.8/93.8
198/278
.686/.763
365/282
77.3%
80.7/99.5
239/295
.663/.647
407/293
72%
90/103
267/306
.616/.56
432/297
68.8%
95.5/105
283/310
.561/.487
444/301
67.8%
98.1/106
291/315
.504/.432
-----335/258
77%
1.10/1.72
.486/.385
DART Late Big Chief 18 Deg Full Port 45 Deg Intake Back Cut Alum421/1862.40/1.90
4.60
No Pipe
N/A-165/141
85.5%
239/191
79.9%
52.8/67.4
157/200
.724/.731
294/237
80.6%
65/83.6
193/248
.668/.68
356/280
78.7%
78.7/98.8
233/293
.647/.643
410/315
76.8%
90.6/111
269/329
.621/.602
445/333
74.8%
98.4/117
291/348
.577/.546
461/339
73.5%
102/120
302/354
.523/.486
469/351
74.8%
104/124
307/367
.473/.448
----355/273
77%
1.11/1.89
.486/.385
DART Big Chief 18 Deg Ported ET Performance AlumN/A2.40/1.88
4.50
N/A77-79/61
78.2%
160-161/130
81%
222-225/180
80.5%
49.4/64.8
146/192
.677/.696
301-297/232
77.6%
66.1/83.6
196/248
.679/.673
369-362/274
75%
80.8/98.7
239/292
.664/.636
410-417/290
70.1%
91.4/104
271/310
.626/.561
433-451/308
69.7%
97.7/111
289/329
.574/.51
454-469/320
69.3%
102/115
302/342
.524/.464
471-478/331
69.8%
105/119
311/353
.479/.427
----355/258
72.7%
-
.486/.381
DART Big Chief 18 Deg Ported MBE I-55 E-55 SF1020 Alum430/1952.45/1.80
4.52
No Pipe
90-100-148/122
82.4%
220/182
82.7%
46.7/71.5
138/212
.653/.735
293/234
79.9%
62.2/92
184/272
.652/.709
362/282
77.9%
76.8/111
228/328
.644/.683
417/315
75.5%
88.5/124
262/367
.618/.636
463/334
72.1%
98.2/131
291/389
.589/.578
494/336
68%
105/132
310/391
.55/.509
513/337
65.7%
109/132
322/392
.507/.454
522/335
64.2%
111/132
328/390
.465/.406
528/-
112
332
.427
--396/275
-
1.23/1.73
.496/.365
DART Big Chief 18 Deg Ported Chapman Alum422/-2.40/1.90
-
No Pipe
91.580/63
78.8%
160/124
77.5%
244/174
71.3%
53.9/61.4
160/182
.739/.666
307/212
69.1%
67.9/74.8
201/222
.697/.608
359/244
68%
79.4/86.1
235/255
.652/.56
401/272
67.8%
88.6/95.9
263/284
.607/.52
440/331
75.2%
97.3/117
288/346
.571/.543
466/346
74.2%
103/122
305/362
.529/.496
472/350
74.2%
104/123
309/366
.476/.446
----356/257
72.1%
1.12
.486/.385
DART Big Chief 18 Deg CNC Slick Rick Racing Heads AlumN/A2.43/1.85
-
No Pipe
N/A--239/199
83.3%
51.5/74
153/219
.715/.782
309/245
79.3%
66.6/91.1
197/270
.693/.722
370/302
81.6%
79.8/112
236/333
.664/.712
424/342
80.7%
91.4/127
271/377
.634/.672
464/355
76.5%
100/132
296/391
.595/.598
496/362
73%
107/135
317/399
.556/.533
515/366
71.1%
111/136
329/403
.513/.479
525/370
70.5%
113/138
335/408
.471/.436
535/370
69.2%
115/138
342/408
.436/.396
--431/323
75.1%
-
.492/.375
DART 18 Deg CNC Full Alum424/185-
-
No Pipe
95--------492/343
69.7%
-
-----
-
1.16/1.85
DART PRO1 18 Deg CNC Bowls Alum421/-2.40/1.90
4.60
No Pipe
N/A--------470/340
72.3%
104/120
308/355
.474/.433
-----
-
1.12
.486/.385
DART 14 Deg Olds Full Port Alum - CFE440/-2.40/1.90N/A--245/204
83.3%
54.2/72
160/213
.742/.78
326/264
81%
72.1/93.1
214/276
.74/.757
376/312
83%
83.1/110
246/326
.683/.716
425/327
76.9%
93.9/115
278/342
.643/.625
457/330
72.2%
101/116
299/345
.593/.541
474/340
71.7%
105/120
310/355
.538/.488
475/341
71.8%
105/120
311/356
.479/.435
----397/303
76.2%
1.08
.486/.385
DART 14 Deg Olds Full Port Alum440/-2.40/1.90
-
No Pipe
N/A--237/192
81%
52.4/67.7
155/201
.718/.734
303/247
81.5%
67/87.1
198/258
.688/.709
361/297
82.3%
79.8/105
236/310
.656/.682
412/317
76.9%
91.1/112
270/331
.624/.606
447/331
74%
98.8/117
293/346
.58/.543
457/341
74.6%
101/120
299/356
.519/.489
463/345
74.5%
102/122
303/361
.467/.44
----383/296
77.2%
1.05
.486/.385
DART 14 Deg Olds Ported Dr Js Performance I-50 Sf600 AlumN/A2.45/-N/A-167/-245/-
52
154
.727
335/-
71.1
211
.745
415/-
88
261
.739
473/-
100
297
.702
515/-
109
324
.655
532/-
113
334
.592
549/-
116
345
.543
561/-
119
353
.499
567/-
120
356
.459
--436
-
-
.496
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
DART Big Chief 14 Deg Oval Full Port I-55 E-55 Deg SF1020 Alum433/2002.47/1.80
-
No Pipe
86-164/129
78.7%
254/182
71.7%
53/71.5
157/212
.747/.735
333/218
65.5%
69.5/85.7
206/254
.735/.66
398/251
63.1%
83.1/98.6
246/292
.703/.608
446/288
64.6%
93.1/113
276/335
.656/.581
482/316
65.6%
101/124
298/368
.608/.547
493/338
68.6%
103/133
305/394
.544/.512
495/349
70.5%
103/137
306/406
.485/.47
----383/259
67.6%
1.14/1.75
.500/.365
DART Big Chief 14 Deg Oval CNC Full Alum433/-2.47/1.80
4.60
No Pipe
N/A--------515/365
70.9%
107/143
318/425
.505/.491
-----
-
1.19
.500/.365
DART Big Chief 14 Deg Oval CNC M2 Race Systems Alum448/-2.45/1.85
4.60
81-144/114
79.2%
236/165
69.9%
50.1/61.4
148/182
.70/.648
299/210
70.2%
63.4/78.1
188/231
.665/.619
375/266
70.9%
79.5/99
236/293
.667/.627
440/306
69.5%
93.3/114
277/337
.653/.601
484/328
67.8%
103/122
304/362
.615/.552
518/342
66%
110/127
326/377
.576/.504
526/352
66.9%
112/131
331/388
.52/.461
534/356
66.7%
113/132
336/392
.475/.42
---395/271
68.6%
1.19
.496/.375
DART Big Chief 14 Deg Ported ET Performance Alum390/-2.45/1.88
4.625
8286-86/62
72.1%
160-160/129
80.6%
240-241/195
81.1%
51/70.2
151/208
.713/.754
309-308/261
84.6%
65.4/94
194/279
.686/.757
361-361/301
83.4%
76.6/108
227/321
.642/.698
409-407/318
77.9%
86.5/115
256/339
.605/.615
440-433/328
75.1%
92.6/118
274/350
.555/.543
453-451/334
73.9%
95.9/120
284/357
.503/.484
467-467/336
71.9%
99.1/121
294/359
.462/.433
----354/275
77.7%
1.20
.496/.381
DART Big Chief 14 Deg Ported ET Performance Alum440/-2.45/1.88
4.625
8290-95/62
67%
176-175/129
73.5%
263-261/195
74.4%
55.6/70.2
165/208
.777/.754
339-338/261
77.1%
71.8/94
213/279
.753/.757
406-403/301
74.4%
85.8/108
254/321
.72/.698
448-442/318
71.5%
94.4/115
280/339
.66/.615
470-465/328
70.2%
99.2/118
294/350
.594/.543
484-473/334
69.8%
101/120
301/357
.532/.484
494-487/336
68.5%
104/121
308/359
.485/.433
----383/275
71.9%
1.11
.496/.381
DART Big Chief 14 Deg Ported MBE I-55 E-55 SF600 Alum449/1922.45/1.83
4.52
No Pipe
72-89-164/122
74.4%
235/182
77.4%
49.8/69.2
148/205
.697/.723
324/234
72.2%
68.7/89
204/264
.721/.697
396/282
71.2%
84/107
249/318
.705/.672
458/315
68.8%
97.2/120
288/355
.679/.625
500/334
66.8%
106/127
314/376
.636/.568
524/336
64.1%
111/128
329/379
.583/.50
525/337
64.2%
111/128
330/380
.519/.446
537/335
62.4%
114/127
338/377
.478/.399
---407/275
67.6%
1.20/1.76
.496/.371
DART Big Chief 14 Deg 5.0 BS Alum512/-2.575/1.90
-
No Pipe
76-163/152
93.3%
260/203
78.1%
49.9/71.6
148/212
.734/.776
344/251
73%
66.1/88.5
196/262
.728/.72
413/302
73.1%
79.3/107
235/316
.699/.693
468/334
71.4%
89.9/118
266/349
.66/.639
512/356
69.5%
98.3/126
291/372
.619/.584
540/366
67.8%
104/129
307/382
.572/.525
551/371
67.3%
106/131
313/388
.518/.473
560/374
66.8%
108/132
319/391
.474/.429
---423/301
71.1%
1.09
.521/.385
DART 11 Deg Big Chief II Oval Full Port 55 Deg SF1020 Alum512/1852.47/1.80
-
No Pipe
N/A-168/137
81.5%
261/198
75.9%
54.5/77.8
161/231
.768/.799
337/256
76%
70.3/101
208/298
.744/.775
404/301
74.5%
84.3/118
250/350
.713/.729
459/327
71.2%
95.8/129
284/381
.675/.66
498/336
67.5%
104/132
308/391
.628/.581
516/341
66.1%
108/134
319/397
.569/.516
518/342
66%
108/134
320/398
.508/.46
528/-
110
326
.466
---410/280
-
1.03/1.85
.500/.365
DART 11 Deg Big Chief II Ported MBE I-55 E-55 SF600 Alum492/1852.52/1.80
4.52
No Pipe
50-90-172/122
70.9%
263/172
65.4%
52.7/67.6
156/200
.758/.694
334/215
64.4%
67/84.5
198/250
.722/.651
408/275
67.4%
81.8/108
242/320
.706/.666
465/302
64.9%
93.2/119
276/352
.67/.61
510/318
62.4%
102/125
303/370
.63/.55
535/327
61.1%
107/129
318/381
.579/.495
539/331
61.4%
108/130
320/385
.518/.445
551/335
60.8%
110/132
327/390
.477/.406
565/336
59.5%
113/132
336/391
.444/.37
--434/273
62.9%
1.15/1.82
.510/.365
DART 11 Deg Big Chief Oval CNC Full Alum512/-2.47/1.80
4.60
No Pipe
N/A--------545/360
66.1%
114/141
337/419
.535/.484
-----
-
1.06
.500/.365
DART 11 Deg Big Chief Ported BES AlumN/A2.50/1.80N/A-158/130
82.3%
249/185
74.3%
50.7/72.7
150/215
.724/.747
344/236
68.6%
70.1/92.7
208/275
.75/.715
424/294
69.3%
86.4/116
256/342
.74/.712
489/338
69.1%
99.6/133
295/394
.711/.682
527/366
69.4%
107/144
318/426
.657/.633
547/378
69.1%
111/149
330/440
.596/.572
545/384
70.5%
111/151
329/447
.528/.517
556/389
70%
113/153
336/453
.485/.471
---427/300
70.3%
-
.506/.365
Edelbrock Victor Jr CNC Oval 60409, 60419 SF1020 Alum320/1182.25/1.90
-
No Pipe
11286/64
74.4%
163/121
74.2%
244/169
69.3%
61.4/59.6
182/177
.788/.646
296/206
69.6%
74.4/72.7
221/215
.717/.591
323/236
73.1%
81.2/83.2
241/247
.626/.542
332/258
77.7%
83.5/91
247/270
.536/.493
341/276
80.9%
85.8/97.3
254/288
.472/.452
------283/211
74.5%
1.07/2.34
.456/.385
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Edelbrock Victor Jr CNC Rect 60409, 60419,60429, 60439 SF1020 Alum295/1182.25/1.90
-
No Pipe
11286/64
74.4%
163/121
74.2%
244/169
69.3%
61.4/59.6
182/177
.788/.646
296/206
69.6%
74.4/72.7
221/215
.717/.591
323/236
73.1%
81.2/83.2
241/247
.626/.542
332/258
77.7%
83.5/91
247/270
.536/.493
341/276
80.9%
85.8/97.3
254/288
.472/.452
------283/211
74.5%
1.16/2.34
.456/.385
Edelbrock/ Chapman 60429, 60439 Oval Ported Alum295/1182.25/1.90
-
No Pipe
11286/64
74.4%
160/121
75.6%
236/169
71.6%
59.4/59.6
176/177
.762/.646
285/206
72.3%
71.7/72.7
212/215
.69/.591
307/236
76.9%
77.2/83.2
229/247
.595/.542
312/258
82.7%
78.5/91
233/270
.504/.493
315/276
87.6%
79.2/97.3
235/288
.436/.452
------269/211
78.4%
1.07/2.34
.456/.385
Edelbrock 60459, 60479, 60499, 61459 Performer RPM 454-O Alum290/1102.19/1.88110/
112
74/71
95.9%
143/128
89.5%
207/153
73.9%
55/55.1
163/163
.687/.591
250/178
71.2%
66.4/64.1
197/190
.622/.516
284/200
70.4%
75.4/72
223/213
.565/.464
309-299/218
71.7%
80.7/78.5
239/233
.504/.421
-------238/175
73.8%
1.05/1.98
.443/.381
Edelbrock 60459 Performer RPM 454-O Wolfplace FlowData Alum290/1102.19/1.88
4.53
No Pipe
11074-73/64
87.1%
146-148/119
81%
218/149
68.3%
57.9/53.7
171/159
.723/.576
260-268/179
67.8%
70.1/64.5
208/191
.657/.519
291-304/207
69.6%
79/74.6
234/221
.592/.48
307-327/229
72.2%
84.2/82.5
249/244
.526/.443
302-319/245
78.9%
82.4/88.3
244/262
.442/.406
------259/188
72.6%
1.09/2.23
.443/.381
Edelbrock Performer 454-O 60479 SF1020 Alum290/1102.19/1.8811074/71
95.9%
143/128
89.5%
207/153
73.9%
55/55.1
163/163
.687/.591
250/178
71.2%
66.4/64.1
197/190
.622/.516
284/200
70.4%
75.4/72
223/213
.565/.464
309/218
70.6%
82/78.5
243/233
.513/.421
-------239/175
73.5%
1.07/1.98
.443/.381
Edelbrock Performer 454-O 60479 CCM Alum290/1102.19/1.88
-
No Pipe
11066/58
87.9%
135/126
93.3%
196/149
76%
52/53.7
154/159
.65/.576
240/171
71.3%
63.7/61.6
189/183
.597/.496
264/189
71.6%
70.1/68.1
208/202
.526/.438
281/203
72.2%
74.6/73.1
221/217
.466/.392
286/213
74.5%
75.9/76.7
225/227
.407/.353
------234/175
75%
0.99/1.94
.443/.381
Edelbrock Performer 454-O 60499 SF1020 Alum290/1102.19/1.8811073/71
97.3%
143/128
89.5%
208/153
73.6%
55.2/55.1
164/163
.69/.591
251/178
70.9%
66.6/64.1
197/190
.625/.516
284/200
70.4%
75.4/72
223/213
.565/.464
299/218
72.9%
79.4/78.5
235/233
.496/.421
-------237/175
74%
1.03/1.98
.443/.381
Edelbrock Performer RPM Xtreme 454-O 51459 SF1020 Alum308-325/ 1332.25/1.88
4.31
112-143/125
87.4%
223-221/172
77.5%
55.8/62
165/184
.717/.665
283-276/199
71.2%
70.3/71.7
208/212
.677/.577
318-315/217
68.6%
79.6/78.2
236/232
.613/.503
335-332/232
69.6%
83.9/83.6
249/248
.539/.448
337/243
72.1%
84.8/87.5
251/259
.466/.403
344-338/252
73.9%
85.8/90.8
254/269
.413/.365
-----282/206
73%
-
.456/.381
Edelbrock Performer RPM 454-R 60559 SF1020 Alum315-300/ 1102.19/1.8811876/70
92.1%
146/132
90.4%
212/156
73.6%
56.3/56.2
167/167
.704/.603
255/181
71%
67.7/65.2
201/193
.635/.525
294/207
70.4%
78/74.6
231/221
.585/.48
314/228
72.6%
83.4/82.1
247/243
.521/.441
-------244/181
74%
-
.443/.381
Edelbrock Performer RPM Xtreme 454-R 51539, %1559 SF1020 Alum345/1452.30/1.88110/118-158/134
84.8%
237/190
80.2%
57/68.4
169/203
.749/.734
299/227
75.9%
72/81.8
213/242
.709/.658
344/255
74.1%
82.8/91.9
245/272
.652/.591
366/267
73%
88.1/96.2
261/285
.578/.516
377/272
72.1%
90.7/98
269/290
.511/.451
385/280
72.7%
92.7/101
275/299
.456/.406
-----309/232
75%
1.12/1.93
.466/.381
Edelbrock Performer RPM 6046 AirWolf 305 Oval Dr Js Performance Alum305/-2.30/1.88
4.31
2" Pipe
105/110/11574/62
83.8%
145/123
84.8%
225/165
73.3%
54.2/59.4
160/176
.711/.638
286/190
66.4%
68.8/68.4
204/203
.678/.551
329/215
65.3%
79.2/77.5
235/229
.624/.499
355/235
66.2%
85.4/84.7
253/251
.561/.454
374/254
67.9%
90/91.5
267/271
.506/.421
381/271
71.1%
91.7/97.6
272/289
.451/.393
387/287
74.2%
93.1/103
276/306
.408/.37
396/299
75.5%
95.3/108
282/319
.375/.347
---320/227
70.8%
1.30
.466/.381
Edelbrock 60559, 61559 Performer RPM 454-R Alum315/1102.19/1.8811876/70
92.1%
146/132
90.4%
210/156
74.3%
55.7/56.2
165/167
.697/.603
255/181
71%
67.7/65.2
201/193
.635/.525
294-284/207
71.6%
76.7/74.6
227/221
.575/.48
314-297/228
74.6%
81.1/82.1
240/243
.507/.441
-------241/181
75%
0.97/2.07
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Edelbrock E-CNC Oval 24 Deg SF1020 Alum308-325/1332.25/1.88
4.31
112-144-143/125
87.1%
221-223/172
77.5%
55.8/62
165/184
.717/.665
283-276/199
71.2%
70.3/71.7
208/212
.677/.577
315-318/217
68.6%
79.6/78.2
236/232
.613/.503
332-335/232
69.6%
83.9/83.6
249/248
.539/.448
337/243
72.1%
84.8/87.5
251/259
.466/.403
337-344/252
74%
85.6/90.8
254/269
.412/.365
-----282/206
73%
-
.456/.381
Edelbrock E-CNC Oval 24 Deg Large Bore SF1020 Alum308-325/1332.25/1.88
4.6
112-149-145/125
85%
230-229/173
75.4%
57.7/62.3
171/185
.741/.669
299-289/200
68%
73.9/72
219/213
.712/.58
337-331/218
65.3%
84/78.5
249/233
.647/.506
358-351/234
66%
89.2/84.3
264/250
.573/.452
364-356/249
69.2%
90.5/89.7
268/266
.498/.413
361-364/257
70.9%
91.2/92.6
270/274
.439/.373
-----297/208
69.9%
-
.456/.381
Edelbrock 77459 Victor Jr. 24 Deg SF1020 Alum300/1282.25/1.9011872-70/64
90.1%
140-139/122
87.5%
213-210/164
77.5%
53.2/57.8
158/171
.683/.627
273-267/199
73.7%
67.9/70.2
201/208
.654/.571
318-297/223
72.5%
77.3/78.7
229/233
.596/.512
342-307/240
74%
81.6/84.6
242/251
.524/.459
346-309/251
76.6%
82.4/88.5
244/262
.453/.411
331-317/257
79.3%
81.5/90.6
241/269
.392/.369
336-324/260
78.8%
83/91.7
246/272
.355/.331
----279/215
76.8%
1.10/2.03
.456/.385
Edelbrock Victor 24 Deg 77409, 77429 SF1020 Alum340/1282.30/1.8811880-75/62
80%
159-153/123
78.8%
234-232/164
70.4%
56.1/59.1
166/175
.736/.634
295-295/197
66.8%
71/71
210/210
.699/.571
343-330/223
66.3%
81/80.3
240/238
.638/.517
369-343/241
67.7%
85.7/86.8
254/257
.562/.466
380-352/255
69.7%
88.1/91.9
261/272
.496/.422
378-364/262
70.6%
89.3/94.4
265/280
.44/.38
379-370/265
70.8%
90.1/95.5
267/283
.394/.341
----311/216
69.5%
1.10/2.07
.466/.381
Edelbrock/ Musi Victor 24 Deg 61409 SF1020 Alum367-377/ 1282.30/1.90114-149-148/122
82.2%
227-220/164
73.4%
53.8/57.8
159/171
.706/.627
301-290/196
66.3%
71.1/69.1
211/205
.70/.562
351-346/225
64.6%
83.9/79.4
249/235
.661/.516
375-385/248
65.3%
91.5/87.5
271/259
.60/.474
389-405/268
67.5%
95.6/94.5
283/280
.538/.439
402-409/284
70%
97.6/100
289/297
.48/.407
409-414/297
72.2%
99/105
293/310
.433/.379
----326/226
69.1%
-
.466/.385
Edelbrock/ Musi Victor 24 Deg Out of Box NPS AlumN/A2.30/1.90
4.49
No Pipe
11483-76/60
75.5%
158/114
72.2%
225-227/159
70.4%
54.4/56.1
161/166
.714/.608
271-287/192
68.8%
67.2/67.7
199/201
.661/.551
314-337/222
68.2%
78.3/78.3
232/232
.617/.509
347-357/249
70.7%
84.7/87.8
251/260
.556/.476
372-370/272
73.3%
89.3/95.9
265/284
.502/.446
386-382/285
74.2%
92.4/101
274/298
.455/.409
385-392/298
76.7%
93.5/105
277/311
.409/.38
----311/224
72.1%
-
.466/.385
Edelbrock/ Musi Victor 24 Deg SF1060 AlumN/A2.30/1.9011478/62
79.5%
157/119
75.8%
237-236/161
68.1%
56.9/56.8
169/168
.747/.616
300/199
66.3%
72.2/70.2
214/208
.711/.571
353/238
67.4%
85/83.9
252/249
.669/.546
383-390/267
69.1%
93/94.2
276/279
.611/.511
403-413/284
69.6%
98.2/100
291/297
.552/.466
408-422/296
71.3%
99.9/104
296/309
.492/.425
413-419/305
73.3%
100/108
297/319
.438/.389
418-421/312
74.4%
101/110
299/326
.398/.358
---344/242
70.5%
-
.466/.385
Edelbrock/ Musi Victor 24 Deg Ported Dr Js Performance I-50 Alum373/-2.35/-N/A79-72/-165-154/-247-242/-
56.4
167
.756
305-310/-
70.9
210
.713
365-368/-
84.5
250
.68
408-425/-
96
285
.644
430-448/-
101
300
.582
448-462/-
105
311
.528
452-467/-
106
314
.474
457-475/-
107
318
.432
---368
-
1.25
.476
Edelbrock Victor 24 Deg Ported RFD 370 Alum370/-2.35/-N/A74/-160/-251/-
57.9
171
.776
313/-
72.2
214
.726
370/-
85.3
253
.687
403/-
92.9
275
.623
432/-
99.6
295
.573
448/-
103
306
.52
455/-
105
311
.469
461/-
106
315
.428
---366
-
1.25
.476
Edelbrock Victor 24 Deg Ported RFD 370 Alum370/-2.35/1.84
-
No Pipe
N/A76/63
82.9%
160/122
76.3%
231/171
74%
53.3/64.3
158/191
.714/.675
304/214
70.4%
70.1/80.5
208/238
.705/.634
363/244
67.2%
83.7/91.8
248/272
.674/.578
396/275
69.4%
91.3/103
271/306
.612/.543
420/299
71.2%
96.8/112
287/333
.557/.506
440/317
72%
101/119
301/353
.51/.47
448/324
72.3%
103/122
306/361
.462/.427
459/326
71%
106/123
314/363
.426/.386
---358/255
71.2%
1.24
.476/.373
Edelbrock Victor 24 Deg Ported RFD 383 Alum383/-2.40/1.84
-
No Pipe
N/A75/63
84%
160/122
76.3%
253/171
67.6%
55.9/64.3
166/191
.766/.675
315/213
67.6%
69.6/80.1
206/237
.715/.631
372/244
65.6%
82.2/91.8
244/272
.676/.578
408/274
67.2%
90.2/103
267/305
.618/.541
432/300
69.4%
95.5/113
283/334
.561/.508
449/316
70.4%
99.3/119
294/352
.51/.468
459/324
70.6%
101/122
301/361
.463/.427
469/326
69.5%
104/123
307/363
.426/.386
---369/254
69%
1.22
.486/.373
Edelbrock Victor 24 Deg Ported RFD 383 Updated 12-04-08 Alum383/-2.40/1.84
-
No Pipe
N/A-162/122
75.3%
235/171
72.8%
51.9/64.3
154/191
.712/.675
306/213
69.6%
67.6/80.1
200/237
.695/.631
368/244
66.3%
81.3/91.8
241/272
.669/.578
408/274
67.2%
90.2/103
267/305
.618/.541
446/300
67.3%
98.6/113
292/334
.579/.508
464/316
68.1%
103/119
304/352
.527/.468
472/324
68.6%
104/122
309/361
.476/.427
485/326
67.2%
107/123
318/363
.441/.386
---372/254
68.4%
1.27
.486/.373
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Edelbrock/ Chapman 77659 Rect. CNC Ported 77609 Alum372/1542.30/1.90
-
No Pipe
13085/62
72.9%
156/135
86.5%
229/198
86.5%
55.1/69.8
163/207
.724/.757
287/242
84.3%
69.1/85.4
205/253
.68/.694
328/278
84.8%
78.9/98.1
234/291
.622/.638
362/300
82.9%
87.1/106
258/314
.572/.574
380/312
82.1%
91.5/110
271/326
.515/.511
------290/244
84.1%
1.02/2.03
.466/.385
Edelbrock Victor 18 Deg 617569 Alum405/952.50/1.969263/60
95.2%
150/137
91.3%
223/190
85.2%
45.4/63
135/187
.648/.704
288/226
78.5%
58.7/74.9
174/222
.628/.628
353/254
72%
71.9/84.2
213/249
.616/.565
415/277
66.7%
84.5/91.8
250/272
.603/.514
468/302
64.5%
95.3/100
282/297
.583/.48
496/324
65.3%
101/107
299/318
.541/.451
491/328
66.8%
100/109
296/322
.476/.405
----361/255
70.7%
1.22/3.45
.506/.397
Edelbrock Big Victor 18 Deg CNC Alum442- 451/1892.45/1.8594---294-284/230
79.6%
61.3/85.6
182/254
.643/.678
360-349/258
72.8%
75.2/96
223/284
.631/.608
414-411/281
68.1%
87.5/105
259/310
.612/.552
457-456/302
66.2%
96.8/112
287/333
.58/.508
482-487/319
65.8%
103/119
305/352
.539/.47
480-486/324
67.1%
102/121
304/357
.478/.424
----413/286
69.1%
-
.496/.375
HRD Ported Dart 360 Alum365/-2.30/1.88N/A-157/132
84.1%
235/177
75.3%
56.6/63.8
168/189
.743/.684
288/225
78.1%
69.3/81.1
205/240
.682/.652
341/270
79.2%
82.1/97.3
243/288
.646/.626
386/302
78.2%
92.9/109
275/322
.61/.584
412/321
77.9%
99.2/116
294/343
.558/.532
424/328
77.4%
102/118
302/350
.502/.475
430/333
77.4%
103/120
307/355
.453/.429
----334/261
78.1%
1.18
.466/.381
HRD Ported Dart 360 16500000 AlumN/A-N/A-165/132
80%
247/177
71.7%
-
302/225
74.5%
-
358/270
75.4%
-
405/302
74.6%
-
433/321
74.1%
-
445/328
73.7%
-
452/333
73.7%
-
----351/261
74.4%
HRD Dart Big Chief 3815 Ported455/-2.45/1.86N/A-167/139
83.2%
260/197
75.8%
55.2/72.5
163/215
.771/.77
331/246
74.3%
70.2/90.5
208/268
.736/.721
411/288
70.1%
87.2/106
258/314
.731/.675
475/339
71.4%
101/125
299/370
.704/.662
530/353
66.6%
112/130
333/385
.674/.591
550/366
66.5%
117/135
346/399
.612/.536
556/372
66.9%
118/137
349/406
.55/.484
----410/288
70.1%
1.22
.496/.377
HRD Dart Big Chief 3815 Ported444/-N/A----394/265
67.3%
-
444/305
68.7%
-
475/353
74.3%
-
504/366
72.6%
-
514/372
72.4%
-
-----466/332
71.3%
1.16
Holley Alum261/1232.19/1.88110------301/-
79.9
237
.428
-------
-
1.15
.443/.381
Holley Avenger Alum CHP314/-2.25/1.88
4.25
Pipe
11971/60
84.5%
137/122
89.1%
199/171
85.9%
50/61.6
148/183
.643/.661
251/207
82.5%
63.1/74.6
187/221
.608/.60
292/233
79.8%
73.4/83.9
218/249
.566/.54
315/252
80%
79.2/90.8
235/269
.509/.487
330/264
80%
83/95.1
246/282
.457/.437
340/269
79.1%
85.5/96.9
253/287
.412/.39
-----266/217
81.4%
1.08
.456/.381
Import / Speier Alum338-342/-2.30/1.88
4.60
No Pipe
N/A-157-160/120
75.7%
235-237/170
72%
56.8/61.2
168/181
.746/.657
295-296/208
70.4%
71.1/74.9
211/222
.70/.603
325-339/235
70.8%
79.9/84.7
237/251
.629/.545
350-354/252
71.6%
84.7/90.8
251/269
.556/.487
360-365/263
72.6%
87.2/94.7
259/281
.491/.436
370-373/271
72.9%
89.4/97.6
265/289
.44/.393
375-373/276
73.8%
90/99.4
267/295
.394/.356
382-373/280
74.2%
90.9/101
269/299
.358/.325
---318/231
72.6%
-
.466/.381
Import / Speier CNC I-45 E-45 Alum358/-2.30/1.88
4.60
No Pipe
N/A-160-163/119
73.7%
244-245/168
68.7%
58.8/60.5
174/179
.773/.649
310-314/205
65.7%
75.1/73.8
223/219
.739/.594
345-363/238
67.2%
85.2/85.7
252/254
.671/.552
377-395/275
71.2%
92.9/99.1
275/294
.61/.532
394-417/294
72.5%
97.6/106
289/314
.549/.487
410-432/305
72.4%
101/110
300/326
.499/.442
422-434/313
73.1%
103/113
305/334
.451/.403
432-435/320
73.8%
104/115
309/342
.411/.371
---350/249
71.1%
1.21
.466/.381
Naiser Racing Components - Slick Rick Racing Heads 5.3 BS Billet Pro Mod AlumN/A2.70/1.95
-
No Pipe
N/A--238/162
68.1%
41.6/54.2
123/161
.641/.604
333/205
61.6%
58.2/68.6
172/203
.672/.573
426/250
58.7%
74.4/83.7
220/248
.688/.559
502/290
57.8%
87.7/97.1
260/288
.676/.54
561/325
57.9%
98/109
290/322
.647/.519
598/350
58.5%
104/117
309/347
.604/.489
627/367
58.5%
110/123
324/364
.563/.456
640/378
59.1%
112/127
331/375
.517/.423
651/380
58.4%
114/127
337/377
.478/.386
660/-
115
342
.444
665/-
116
344
.413
536/301
-
-
.547/.395
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Naiser Racing Components - Slick Rick Racing Heads SR1 5.3 BS Billet Pro Mod AlumN/A2.65/2.00
-
No Pipe
N/A--255/185
72.5%
46.2/58.9
137/174
.699/.672
345/235
68.1%
62.6/74.8
185/222
.71/.64
432/279
64.6%
78.3/88.8
232/263
.711/.608
502/317
63.1%
91/101
270/299
.688/.576
552/348
63%
100/111
297/328
.649/.542
597/371
62.1%
108/118
321/350
.614/.506
620/386
62.3%
112/123
333/364
.567/.468
630/392
62.2%
114/125
338/370
.518/.427
645/392
60.8%
117/125
347/370
.482/.388
654/393
60.1%
119/125
351/371
.448/.357
660/-
120
355
.418
536/330
-
-
.537/.405
Patriot 320 Alum320/1252.25/1.8811986/64
74.4%
177/148
83.6%
252/195
77.4%
63.4/70.2
188/208
.814/.754
295/231
78.3%
74.2/83.2
220/247
.715/.67
326/256
78.5%
82/92.2
243/273
.632/.594
359/269
74.9%
90.3/96.9
268/287
.58/.52
369/275
74.5%
92.8/99.1
275/294
.511/.456
------296/229
77.3%
1.15/2.20
.456/.381
Patriot 320 Weingartner Racing AlumN/A2.25/1.88
4.31
No Pipe
N/A63-57/60
100%
140-127/103
77.2%
195-190/154
80%
48.4/55.5
143/164
.622/.595
252-250/189
75.3%
63.1/68.1
187/202
.608/.548
305-309/242
78.8%
77.2/87.2
229/258
.595/.561
343-326/256
76.5%
84.1/92.2
249/273
.54/.495
369-326/266
76.5%
87.4/95.8
259/284
.481/.441
363-343/266
75.4%
88.8/95.8
263/284
.428/.386
350-341/267
77.3%
86.9/96.2
257/285
.372/.344
350-336/268
78.1%
86.3/96.5
256/286
.332/.311
---290/223
77.1%
-
.456/.381
Patriot Freedom 360 Meaux Racing Cyl 3 SF600 AlumN/A2.35/1.88
4.50
No Pipe
N/A-160/139
86.9%
237/183
77.2%
54.6/65.9
162/195
.733/.707
290/226
77.9%
66.9/81.4
198/241
.673/.655
337/256
76%
77.7/92.2
230/273
.625/.594
358/265
74%
82.5/95.5
245/283
.554/.512
371/271
73%
85.5/97.6
253/289
.492/.449
381/274
71.9%
87.8/98.7
260/292
.442/.397
389/274
70.4%
89.7/98.7
266/292
.401/.353
395/274
69.4%
91.1/98.7
270/292
.366/.318
---324/240
74.1%
-
.476/.381
Pro Comp 320 Alum320/-2.25/1.88
4.50
118-160/97
60.6%
226/152
67.3%
56.8/54.8
168/162
.73/.588
274/181
66.1%
68.9/65.2
204/193
.664/.525
302/216
71.5%
76/77.8
225/231
.585/.501
318/249
78.3%
80/89.7
237/266
.514/.481
333/268
80.5%
83.8/96.5
248/286
.461/.444
348/283
81.3%
87.5/102
259/302
.422/.41
-----280/207
73.7%
1.09
.456/.381
Pro Comp 320 CNC RaceParts AlumN/A2.25/1.8811574/62
83.8%
166/118
71.1%
245/160
65.3%
61.6/57.6
183/171
.791/.618
308/195
63.3%
77.5/70.2
230/208
.746/.565
340/229
67.4%
85.5/82.5
253/244
.659/.531
360/248
68.9%
90.5/89.3
268/265
.581/.479
375/265
70.7%
94.3/95.5
279/283
.519/.439
------299/203
67.7%
-
.456/.381
Pro Comp 320 Out of Box Meaux Racing SF600 AlumN/A2.30/1.88
4.50
No Pipe
N/A-143-145/137
95.1%
221-220/183
83%
53.1/65.9
157/195
.697/.707
277-273/210
76.4%
66.2/75.7
196/224
.652/.609
313-312/230
73.6%
75.2/82.9
223/245
.592/.533
333-331/251
75.6%
79.9/90.4
237/268
.525/.485
342/263
76.9%
82.3/94.7
244/281
.463/.436
351-346/274
78.6%
83.9/98.7
249/292
.413/.397
355-354/282
79.5%
85.3/102
253/301
.373/.363
364-360/286
79%
87.1/103
258/305
.343/.332
---299/235
78.6%
-
.466/.381
Pro Comp 320 VJ Bowl / Chamber Work Meaux Racing SF600 AlumN/A2.30/1.88
4.50
No Pipe
N/A-152-154/125
81.7%
242/178
73.6%
58.2/64.1
173/190
.765/.688
299-305/215
71.2%
72.7/77.5
215/229
.716/.623
334-345/261
76.9%
81.7/94
242/279
.644/.605
354-359/287
80.5%
85.8/103
254/306
.563/.555
365-369/301
82%
88.3/108
262/321
.497/.499
370-374/309
83.1%
89.5/111
265/330
.441/.448
375/312
83.2%
90.3/112
267/333
.395/.402
----313/249
79.3%
-
.466/.381
Pro Comp 360 CNC Alum360/-2.25/1.8811573/60
82.2%
141/121
85.8%
212/166
78.3%
53.3/59.8
158/177
.685/.642
280/205
73.2%
70.4/73.8
209/219
.678/.594
331/240
72.5%
83.2/86.5
247/256
.641/.557
365/265
72.6%
91.8/95.5
272/283
.589/.512
389/289
74.3%
97.8/104
290/308
.538/.479
404/307
76%
102/111
301/328
.489/.445
407/321
78.9%
102/116
303/343
.438/.414
----316/239
75.7%
1.13
.456/.381
Pro Comp VJ SSR Polished them out Chad Speier SF600 AlumN/A2.30/-
4.31
N/A-160/-217-210/-
51.4
152
.675
260-255/-
62
184
.61
302-292/-
71.5
212
.563
335-320/-
78.8
234
.517
362-345/-
85.1
252
.479
367-352/-
86.5
256
.426
369-358/-
87.5
259
.383
----292
-
-
.466
Pro-FilerP/N 174-29 24 Deg Alum290/-2.30/1.88119-148/129
87.2%
213/162
76.1%
51.3/58.4
152/173
.673/.626
276/198
71.7%
66.4/71.3
197/211
.654/.574
-327/250
76.5%
78.7/90.1
233/267
.517/.483
338/261
77.2%
81.4/94
241/279
.458/.432
350/264
75.4%
84.2/95.1
250/282
.415/.383
-----275/211
76.5%
1.21
.466/.381
Pro-Filer 290 Out of Box CNC Chambers Weingartner Racing Alum290/-2.25/1.88
4.13
No Pipe
N/A76/61
80.3%
146-143/114
78.9%
210-208/158
75.6%
52.6/56.9
156/169
.675/.611
261/188
72%
65.6/67.7
194/201
.632/.545
311-308/224
72.4%
77.8/80.7
231/239
.60/.52
344-329/249
74%
84.6/89.7
251/266
.543/.481
353-314/259
77.7%
83.9/93.3
249/276
.462/.429
344-325/268
80.1%
84.1/96.5
249/286
.405/.388
344-330/273
81%
84.8/98.3
251/291
.363/.352
337-331/276
82.6%
84/99.4
249/295
.324/.32
---289/223
77.3%
1.16
.456/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Pro-Filer 290 24 Deg Darin Morgan Alum290/-2.30/1.88119-155/-235/-
56.6
168
.743
296/-
71.2
211
.701
350/-
84.2
250
.664
379/-
91.2
270
.599
382/-
91.9
272
.517
385/-
92.7
275
.456
387/-
93.1
276
.408
390/-
93.9
278
.37
---329
-
1.34
.466/.381
Pro-Filer 290 Oval VJ Bowl Blend Dr Js Performance AlumN/A2.25/1.88
4.31
2" Pipe
11882/69
84.1%
163/117
71.8%
236/160
67.8%
59.4/57.6
176/171
.762/.618
295/193
65.4%
74.2/69.5
220/206
.715/.56
335/224
66.9%
84.3/80.7
250/239
.649/.52
355/251
70.7%
89.3/90.4
265/268
.573/.485
358/268
74.9%
90/96.5
267/286
.496/.444
------290/202
69.6%
-
.456/.381
Pro-Filer 290 Oval Dr Js Performance CCMAlum290/782.30/1.88
4.30
11884/69
82.1%
165/117
70.9%
236/160
67.8%
56.8/57.6
168/171
.746/.618
295/193
65.4%
71/69.5
210/206
.699/.56
335/224
66.9%
80.6/80.7
239/239
.635/.52
356/251
70.5%
85.7/90.4
254/268
.562/.485
368/268
72.8%
88.6/96.5
262/286
.498/.444
------293/202
69.1%
1.27/3.44
.466/.381
Pro-Filer 290 Ported Foxwell Motorsports I-45 AlumN/A2.35/1.85N/A-162-161/122
75.5%
240-230/165
70.2%
54.2/61.4
161/182
.727/.648
289-286/220
76.5%
66.3/81.8
196/243
.667/.648
339-333/265
78.9%
77.5/98.6
230/292
.623/.625
367-349/286
79.9%
82.5/106
245/315
.554/.562
389-371/299
78.7%
87.6/111
260/330
.504/.503
401-393/310
78.1%
91.5/115
271/342
.46/.457
412-404/-
94.1
279
.421
----320/238
-
-
.476/.375
Pro-Filer 290 Oval Ported Chad Speier AlumN/A2.25/1.88
4.155
No Pipe
119-168-170/120
71%
231-233/157
67.7%
58.3/56.6
173/168
.749/.607
285-290/193
67.1%
72.3/69.5
214/206
.696/.56
333-337/220
65.7%
84.3/79.3
250/235
.649/.51
352/247
70.2%
88.5/89
262/264
.568/.477
361-357/259
72.1%
90.3/93.3
268/276
.497/.429
363-359/264
73.1%
90.8/95.1
269/282
.437/.383
361-362/269
74.4%
90.9/96.9
269/287
.389/.347
358-364/271
75.1%
90.8/97.6
269/289
.35/.314
---313/222
71%
-
.456/.381
Pro-FilerP/N 174-32 24 Deg Alum320/-2.30/1.88119-164/129
78.7%
228/162
71.1%
54.9/58.4
163/173
.72/.626
288/198
68.8%
69.3/71.3
205/211
.682/.574
337/236
70%
81.1/85
240/252
.639/.547
379/250
66%
91.2/90.1
270/267
.599/.483
395/261
66.1%
95.1/94
282/279
.535/.432
392/264
67.3%
94.3/95.1
280/282
.464/.383
390/268
68.7%
93.9/96.5
278/286
.411/.345
----322/221
68.7%
1.23
.466/.381
Pro-FilerP/N 174-35 24 Deg Alum350/-2.30/1.88119-165/129
78.2%
230/162
70.4%
55.4/58.4
164/173
.727/.626
290/198
68.3%
69.8/71.3
207/211
.687/.574
340/235
69.1%
81.8/84.7
242/251
.645/.545
380/250
65.8%
91.5/90.1
271/267
.60/.483
400/261
65.3%
96.3/94
285/279
.542/.432
412/264
64.1%
99.2/95.1
294/282
.488/.383
-----317/214
67.6%
1.18
.466/.381
Pro-FilerP/N 184 12 Deg Alum470/-2.40/1.9060-160/137
85.6%
239/182
76.2%
52.8/64.2
157/190
.724/.696
314/226
72%
69.4/79.7
206/236
.713/.648
384/275
71.6%
84.9/97
252/287
.698/.631
431/298
69.1%
95.3/105
282/311
.653/.57
458/306
66.8%
101/108
300/320
.594/.502
483/310
64.2%
107/109
316/324
.548/.445
497/320
64.4%
110/113
326/334
.502/.408
----371/257
69.3%
1.06
.486/.385
Pro-Filer 12 Deg CNC MBE Alum475/1872.40/1.9055.5--------507/319
62.9%
112/113
332/333
.512/.407
-----
-
1.07/1.71
.486/.385
Pro-Filer NEW 2010 SniperX Conventional Port CNC Darin Morgan SF600 Alum375/-2.35/1.85
-
No Pipe
N/A-156/128
82.1%
234/171
73.1%
53.9/63.6
160/188
.724/.672
306/205
67%
70.5/76.3
209/226
.71/.604
360-368/237
65.1%
83.9/88.2
249/261
.675/.559
407-414/298
72.6%
94.6/111
280/328
.635/.585
427-451/314
71.5%
101/117
300/346
.582/.529
444-468/321
70.4%
105/119
312/354
.529/.473
459-477/327
69.9%
108/122
320/360
.482/.428
472-481/332
69.7%
110/124
326/366
.442/.391
---368/259
70.5%
1.27
.476/.375
Pro-Filer SniperX Conventional Port Darin Morgan SF600 Alum375/-2.35/1.85
-
No Pipe
N/A-159/120
75.5%
236-235/160
67.9%
54.3/59.5
161/176
.728/.629
307-301/197
64.8%
70.1/73.3
208/217
.705/.58
360-363/238
65.8%
83.3/88.5
247/262
.671/.561
396-410/289
71.7%
92.9/108
275/319
.623/.568
422-444/308
71.1%
99.8/115
296/340
.574/.519
437-460/319
71.1%
103/119
306/352
.52/.47
444-466/327
71.9%
105/122
311/360
.469/.428
454-474/332
71.6%
107/124
317/366
.43/.391
---363/254
70.2%
1.24
.476/.375
Pro-Filer Spread Port Darin Morgan SF600 AlumN/A2.40/1.88
-
No Pipe
N/A-161/88
54.7%
250/130
52%
55.3/46.8
164/139
.757/.503
327/167
51.1%
72.3/60.2
214/178
.743/.484
401/181
45.1%
88.6/65.2
263/193
.729/.42
449/192
42.8%
99.3/69.2
294/205
.68/.371
482/203
42.1%
107/73.1
316/217
.626/.336
496/208
41.9%
110/74.9
325/222
.563/.302
503/212
42.1%
111/76.4
329/226
.508/.273
513/217
42.3%
113/78.2
336/232
.466/.252
---398/178
44.6%
-
.486/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Pro Topline 260 Oval Gamrace260/-2.19/1.88
4.30
No Pipe
N/A--175/128
73.1%
46.5/46.1
138/137
.581/.495
218/140
64.2%
57.9/50.4
171/149
.543/.406
236/149
63.1%
62.7/53.7
186/159
.47/.346
251/153
61%
66.6/55.1
197/163
.416/.296
255/154
60.4%
67.7/55.5
201/164
.363/.255
------227/145
63.8%
0.98
.443/.381
Pro Topline 260 Oval Ported Gamrace Stage 1260/-2.19/1.88
4.30
No Pipe
N/A--205/142
69.3%
54.4/51.2
161/152
.68/.549
265/169
63.8%
70.4/60.9
208/180
.66/.49
302/192
63.6%
80.2/69.2
238/205
.601/.445
302/209
69.2%
80.2/75.3
238/223
.501/.404
297/225
75.8%
78.8/81.1
234/240
.422/.373
------274/187
68.3%
1.16
.443/.381
Pro Topline 300 Ported ET Performance Alum300/-2.30/1.80
4.60
12078-77/63
81.3%
153-150/133
87.8%
226-221/167
74.7%
53.8/65.6
159/194
.706/.674
287-287/199
69.3%
69.1/78.2
205/232
.68/.603
332-333/223
67.1%
80/87.6
237/260
.63/.54
364-383/239
64%
89.9/93.9
266/278
.59/.482
379-400/250
64.2%
93.7/98.2
278/291
.527/.433
387-390/-
93.5
277
.46
-----307/202
-
1.30
.466/.365
Pro Topline 320 Alum320/1352.25/1.8811974/62
83.8%
166/118
71.1%
245/160
65.3%
61.6/57.6
183/171
.791/.618
308/195
63.3%
77.5/70.2
230/208
.746/.565
339/229
67.6%
85.3/82.5
253/244
.657/.531
360/248
68.9%
90.5/89.3
268/265
.581/.479
374/265
70.9%
94.1/95.5
279/283
.518/.439
------299/203
67.8%
1.17/1.96
.456/.381
Pro Topline 320 Out of Box Alum320/1352.25/1.88
4.50
11983/66
79.5%
152/138
90.8%
218/173
79.4%
54.8/62.3
162/185
.704/.669
278/200
71.9%
69.9/72
207/213
.673/.58
333/232
69.7%
83.8/83.6
248/248
.645/.538
364/256
70.3%
91.5/92.2
271/273
.588/.495
375/273
72.8%
94.3/98.3
279/291
.519/.452
------287/212
74%
1.17/2.02
.456/.381
Pro Topline 325 Ported ET Performance Alum325/-2.30/1.80
4.50
12573-72/62
85.5%
155-156/120
77.2%
237-238/156
65.7%
57.2/61.3
169/182
.75/.63
296-301/211
70.7%
71.8/82.9
213/246
.707/.639
338-351/242
70.2%
82.9/95.1
246/282
.653/.586
367-385/258
68.6%
90.5/101
268/300
.594/.521
386-399/269
68.5%
94.5/106
280/313
.532/.465
399-405/277
68.9%
96.8/109
287/323
.476/.419
-----315/219
69.5%
1.24
.466/.365
Pro Topline 355 Ported ET Performance Alum355/-2.30/1.80
4.625
12076-78/64
83.1%
160-160/122
76.3%
243-240/167
69.2%
58.1/65.6
172/194
.763/.674
305-307/205
67%
73.7/80.6
218/239
.725/.621
354-367/239
66.3%
86.8/93.9
257/278
.683/.579
379-400/264
67.8%
93.7/104
278/307
.615/.533
398-417/284
69.7%
98.1/112
291/331
.552/.491
412-419/297
71.5%
100/117
296/346
.492/.45
-----326/225
69.2%
1.17
.466/.365
Pro Topline 360 Alum360/1352.30/1.8811975/62
82.7%
158/118
74.7%
230/160
69.6%
55.4/57.6
164/171
.727/.618
286/195
68.2%
68.8/70.2
204/208
.678/.565
342/229
67%
82.3/82.5
244/244
.648/.531
380/248
65.3%
91.5/89.3
271/265
.60/.479
403/265
65.8%
97/95.5
287/283
.546/.439
------300/203
67.5%
1.12/1.96
.466/.381
Pro Topline 400 Ported ET Performance Alum400/-2.35/1.80
4.50
12578-78/67
85.9%
154-155/123
79.6%
238-238/160
67.2%
54.9/62.9
163/186
.736/.646
305-304/198
65%
70.2/77.8
208/231
.706/.60
352-358/228
64.2%
81.8/89.6
243/265
.659/.552
382-401/266
67.9%
90.3/105
267/310
.605/.537
406-426/292
70.2%
95.9/115
284/340
.551/.505
422-433/303
70.9%
98.6/119
292/353
.496/.459
-----327/224
68.6%
1.07
.476/.365
Reher Morrison Dart 360 Alum375/-2.30/1.88N/A-------415/-
99.9
296
.492
------
-
1.11
.466/.381
Reher Morrison Dart 360 AlumN/A2.30/1.88
4.60
118----350/-
84.2
250
.664
--420/290
69%
101/104
300/310
.498/.42
-----385
-
-
.466/.381
Reher Morrison Dart 360 AlumN/A2.325/1.88
4.60
118----360/-
84.8
251
.675
--430/300
69.8%
101/108
300/320
.504/.435
-----395
-
-
.471/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Reher Morrison Dart 360 Alum370/-2.325/1.88
4.60
N/A-------435/-
102
304
.51
------
-
1.18
.471/.381
Reher Morrison Oval 14 DegN/A2.45/1.85N/A----400/-
84.8
251
.712
--500/-
106
314
.556
-----450
-
-
.496/.375
Reher Morrison 14 Deg467/-2.45/1.85N/A-------520/-
110
327
.578
------
-
1.11
.496/.375
Reher Morrison 14 Deg476/-2.45/1.85N/A-------510/-
108
321
.567
-520/-
110
327
.463
---515
-
1.09
.496/.375
Reher Morrison 18 Deg476/-2.40/1.90N/A-------490/-
108
321
.556
505/-
112
331
.51
520/-
115
341
.472
---505
-
1.09
.486/.385
Reher Morrison Brodix BB-2Plus 26 Deg Alum320/-2.25/1.88119-161/132
82%
244/169
69.3%
61.4/60.9
182/180
.788/.653
285/204
71.6%
71.7/73.5
212/218
.69/.591
328/234
71.3%
82.5/84.3
244/250
.636/.543
359/261
72.7%
90.3/94
268/279
.58/.504
369/274
74.3%
92.8/98.7
275/292
.511/.454
373/284
76.1%
93.8/102
278/303
.452/.412
-----303/223
73.5%
1.17
.456/.381
Reher Morrison Brodix BB-2 26 Deg AlumN/A2.30/1.88N/A-154/157
101%
222/201
90.5%
53.4/72.4
158/215
.701/.777
286/233
81.5%
68.8/83.9
204/249
.678/.676
324/258
79.6%
78/92.9
231/275
.614/.598
360/275
76.4%
86.6/99.1
257/294
.569/.532
380/286
75.3%
91.5/103
271/305
.515/.474
385/292
75.8%
92.7/105
275/312
.456/.423
-----302/243
80.6%
-
.466/.381
Reher Morrison Brodix BB-2Xtra 26 Deg Alum355/-2.30/1.88119-183/134
73.2%
235/177
75.3%
56.6/63.8
168/189
.743/.684
294/216
73.5%
70.8/77.8
210/231
.697/.626
340/247
72.6%
81.8/89
242/264
.645/.573
376/268
71.3%
90.5/96.5
268/286
.594/.518
395/279
70.6%
95.1/101
282/298
.535/.462
408/288
70.6%
98.2/104
291/307
.483/.417
-----319/230
72.1%
1.15
.466/.381
Reher Morrison Raptor 12 Deg Alum465/-2.45/1.8565----423/-
89.7
266
.753
--525/-
111
330
.584
535/-
113
336
.529
540/-
115
339
.481
---506
-
1.16
.496/.375
Reher Morrison Raptor - Darin Morgan SF600 AlumN/A2.45/1.85
-
No Pipe
N/A-153/135
88.2%
258/190
73.6%
54.7/70.7
162/209
.765/.746
346/240
69.4%
73.4/89.3
217/265
.77/.707
422/289
68.5%
89.5/108
265/319
.751/.681
485/315
64.9%
103/117
305/347
.719/.619
514/330
64.2%
109/123
323/364
.653/.556
526/336
63.9%
112/125
331/370
.585/.495
540/339
62.8%
115/126
339/374
.534/.444
550/340
61.8%
117/126
346/375
.489/.401
---422/279
66.3%
-
.496/.375
Reher Morrison Raptor II - Darin Morgan SF600 I-50 E-50 Alum480/-2.45/1.85
4.625
No Pipe
66-155-161/134
84.8%
245-243/182
74.6%
51.8/67.7
153/201
.724/.715
345-350/223
64.2%
73.7/83
218/246
.773/.657
425-427/257
60.3%
90.4/95.6
268/283
.758/.606
489-487/286
58.6%
104/106
307/315
.724/.562
519-515/316
61.1%
110/118
325/348
.657/.532
538-527/340
63.8%
113/126
335/375
.592/.501
544/354
65.1%
115/132
342/390
.538/.464
547-552/358
65.2%
117/133
345/395
.489/.422
---423/272
64.4%
1.14
.496/.375
Reher Morrison 5.3 BS Pro Mod Darin Morgan SF600 AlumN/A2.68/2.05
-
No Pipe
N/A-171/125
73.1%
275/182
66.2%
48.7/55.1
144/163
.746/.645
374/228
61%
66.3/69.1
196/205
.761/.606
456/274
60.1%
80.8/83
240/246
.742/.583
521/319
61.2%
92.4/96.6
274/286
.706/.565
568/352
62%
101/107
298/316
.66/.535
609/374
61.4%
108/113
320/336
.619/.497
639/393
61.5%
113/119
336/353
.578/.464
659/403
61.2%
117/122
346/362
.536/.429
678/413
60.9%
120/125
356/371
.501/.399
687/417
60.7%
122/126
361/374
.466/.37
698/419
60%
124/127
367/376
.437/.343
528/325
61.5%
-
.543/.415
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
RHS Pro Action Iron320/-2.25/1.8811975/62
82.7%
166/118
71.1%
246/160
65%
61.9/57.6
183/171
.795/.618
309/195
63.1%
77.7/70.2
230/208
.749/.565
340/229
67.4%
85.5/82.5
253/244
.659/.531
360/248
68.9%
90.5/89.3
268/265
.581/.479
375/265
70.7%
94.3/95.5
279/283
.519/.439
------299/203
67.7%
1.17
.456/.381
RHS Out of Box Weingartner Racing IronN/A2.25/1.88
4.50
No Pipe
N/A86/70
81.4%
183/139
76%
252/176
69.8%
63.4/63.4
188/188
.814/.68
303/205
67.7%
76.2/73.8
226/219
.734/.594
334/231
69.2%
84/83.2
249/247
.647/.536
341/243
71.3%
85.8/87.5
254/259
.551/.47
346/258
74.6%
87/92.9
258/275
.479/.427
346/264
76.3%
87/95.1
258/282
.419/.383
-----301/217
72%
-
.456/.381
RHS 320 Out of Box Weingartner Racing Brez IronN/A2.25/1.88
4.31
No Pipe
N/A86/66
76.7%
167/133
79.6%
237/173
73%
59.6/62.3
177/185
.765/.669
288/206
71.5%
72.4/74.2
215/220
.698/.597
328/227
69.2%
82.5/81.8
244/242
.636/.526
350/246
70.3%
88/88.6
261/263
.565/.475
359/255
71%
90.3/91.9
268/272
.497/.422
355/261
73.5%
89.3/94
265/279
.43/.378
-----298/214
72%
-
.456/.381
RHS 320 Ported Bowl Weingartner Racing Brez IronN/A2.25/1.88
4.31
No Pipe
N/A-163/136
83.4%
240/180
75%
60.4/64.8
179/192
.775/.696
281/212
75.4%
70.7/76.4
209/226
.681/.615
327/242
74%
82.2/87.2
244/258
.634/.561
361/261
72.3%
90.8/94
269/279
.583/.504
365/267
73.2%
91.8/96.2
272/285
.505/.442
373/271
72.7%
93.8/97.6
278/289
.452/.393
-----301/224
74.4%
-
.456/.381
RHS 320 VJ Bowl Blend Foxwell Motorsports IronN/A2.25/1.88N/A-149/105
70.5%
218/144
66.1%
54.8/51.9
162/154
.704/.557
280-278/183
65.6%
70.2/65.9
208/195
.676/.531
327-328/215
65.6%
82.4/77.5
244/229
.635/.499
350-357/237
67%
88.9/85.4
263/253
.571/.458
362-357/253
70.4%
90.4/91.1
268/270
.498/.419
367-357/266
73.5%
91/95.8
270/284
.438/.386
-----293/200
68.5%
-
.456/.381
RHS 360 Weingartner Racing I-BC IronN/A2.30/1.88
4.625
No Pipe
N/A70-68/56
81.2%
145-138/112
79.2%
215-207/154
73%
50.8/55.5
150/164
.667/.595
285-277/190
67.6%
67.6/68.4
200/203
.666/.551
339-333/218
64.9%
80.9/78.5
240/233
.637/.506
375-351/235
64.7%
87.4/84.7
259/251
.573/.454
378-356/249
67.8%
88.3/89.7
262/266
.497/.413
381-363/261
70.2%
89.5/94
265/279
.441/.378
383-371/268
71.1%
90.7/96.5
269/286
.397/.345
387-375/273
71.7%
91.7/98.3
272/291
.361/.317
---314/218
69.3%
-
.466/.381
RHS Pro Action Westech Alum320/-2.25/1.88N/A72-72/60
83.3%
131-129/114
87.7%
191-186/156
82.8%
47.4/56.2
140/167
.609/.603
248-238/193
79.4%
61.1/69.5
181/206
.589/.56
296-286/224
77%
73.2/80.7
217/239
.564/.52
320-330/252
77.5%
81.7/90.8
242/269
.525/.487
328-356/276
80.7%
86/99.4
255/295
.473/.457
------253/203
80%
1.07
.456/.381
RHS Pro Action360/-2.30/1.8811975/62
82.7%
158/118
74.7%
230/160
69.6%
55.4/57.6
164/171
.727/.618
286/195
68.2%
68.8/70.2
204/208
.678/.565
342/229
67%
82.3/82.5
244/244
.648/.531
380/248
65.3%
91.5/89.3
271/265
.60/.479
403/265
65.8%
97/95.5
287/283
.546/.439
------300/203
67.5%
1.12
.466/.381
RHS ProTopLine Ported Meaux Racing IronN/A2.30/1.88
4.50
No Pipe
N/A-154/124
80.5%
236/171
72.5%
56.8/61.6
168/183
.746/.661
290/207
71.4%
69.8/74.6
207/221
.687/.60
319/229
71.8%
76.8/82.5
227/244
.605/.531
340/245
72.1%
81.8/88.3
242/262
.537/.474
350/256
73.1%
84.2/92.2
250/273
.474/.424
356/264
74.2%
85.7/95.1
254/282
.422/.383
359/268
74.7%
86.4/96.5
256/286
.378/.345
362/271
74.9%
87.1/97.6
258/289
.343/.314
---307/226
73.6%
-
.466/.381
RHS ProTopLine Ported Meaux Racing IronN/A2.30/1.88
4.50
No Pipe
N/A-147/139
94.6%
232/179
77.2%
55.8/64.5
165/191
.733/.692
294/224
76.2%
70.8/80.7
210/239
.697/.649
328/271
82.6%
78.9/97.6
234/289
.622/.629
354/297
83.9%
85.2/107
252/317
.559/.574
376/309
82.2%
90.5/111
268/330
.509/.512
390/318
81.5%
93.9/115
278/339
.462/.461
397/320
80.6%
95.6/115
283/342
.418/.412
405/322
79.5%
97.5/116
289/344
.384/.373
---325/264
81.4%
-
.466/.381
RHS Chad Speier V3.93 I-50 E-50 Iron / AlumN/A2.35/1.88
4.60
No Pipe
120-155-151/118
77.1%
232-230/162
70.1%
53.3/58.4
158/173
.714/.626
310-303/194
63.3%
70.7/69.9
209/207
.711/.562
367-354/227
63%
83.1/81.8
246/242
.669/.526
406-383/256
64.9%
91/92.2
269/273
.61/.495
424-410/278
66.7%
96.1/100
285/297
.553/.461
437-429/294
67.9%
99.8/106
296/314
.502/.426
440/308
70%
101/111
301/329
.454/.397
444-443/316
71.3%
102/114
303/337
.411/.366
448-445/318
71.2%
103/115
305/339
.377/.335
--363/247
68.2%
-
.476/.381
RHS Chad Speier V4.20 I-50 E-45 Iron395/-2.35/1.88
4.50
No Pipe
118-157-160/125
78.9%
240-244/161
66.5%
55.8/58
165/172
.748/.622
307-308/200
65%
70.9/72
210/213
.713/.58
361-366/230
63.3%
83.8/82.9
248/245
.674/.533
412-402/255
62.7%
93.8/91.9
278/272
.629/.493
437-430/280
64.6%
99.9/101
296/299
.575/.464
442-433/296
67.7%
101/107
299/316
.507/.429
447-442/310
69.7%
102/112
304/331
.458/.399
457-446/316
70%
104/114
308/337
.419/.366
---361/241
67%
1.14
.476/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
RHS Chad Speier I-50 E-50 IronN/A2.35/1.88
4.60
2.25 Pipe
N/A-155-158/132
84.3%
234-237/184
78.1%
54.3/66.3
161/196
.728/.711
301/223
74.1%
69.4/80.3
206/238
.698/.647
353-351/262
74.4%
81.2/94.4
240/280
.653/.608
402-388/262
66.3%
91.1/94.4
270/280
.611/.506
432-417/291
68.6%
97.9/105
290/311
.563/.482
441-430/310
71.2%
100/112
298/331
.505/.449
446-439/323
73%
102/116
302/345
.456/.416
454-451/329
72.7%
104/119
309/351
.42/.382
459-455/333
72.9%
105/120
312/355
.385/.351
--365/265
72.5%
-
.476/.381
Sonny's Brodix BB-5 Sportsman Alum395/123-119-------418/275
65.8%
-
------
-
1.06/2.24
Sonny's Brodix BB-5 MaxFlow Alum406/149-113.5.--------/311439/-
-
-----
-
1.08
Sonny's Brodix BB-5 MaxFlow Marine Alum406/1492.35/1.90113.5.------383-405/295
74.9%
90.8/104
269/308
.522/.484
401-418/303
74%
94.4/107
280/317
.475/.435
-----402/299
74.4%
1.01/2.03
.476/.385
Sonny's Brodix BB-5 400 MaxFlow Alum400/1492.35/1.90113.5.--------/311445/-
103
304
.459
-----
-
1.11
.476/.385
Sonny's Dart 360 Ported AlumN/A-N/A-------413/297
71.9%
-
------
Sonny's Dart 18 Deg Ported SF600 AlumN/A2.35/1.86N/A-------437/339
77.6%
101/125
299/370
.507/.497
------
-
-
.476/.377
Sonny's / Brodix PB 2005 14.5 Deg Alum490/-2.52/1.8680-129/111
86%
199/156
78.4%
39.9/57.4
118/170
.574/.61
287/196
68.3%
57.5/72.1
170/214
.621/.574
334/231
69.2%
67/85
198/252
.578/.542
431/258
59.9%
86.4/95
256/281
.621/.504
482/274
56.8%
96.6/101
286/299
.596/.459
517/287
55.5%
104/106
307/313
.559/.421
540/293
54.3%
108/108
321/320
.519/.382
----365/226
61.9%
1.10
.510/.377
Sonny's / Brodix PB 2005 14.5 Deg Lt Ported Alum493/1752.52/1.8680-153/132
86.3%
241/187
77.6%
48.3/68.8
143/204
.695/.731
323/227
70.3%
64.8/83.5
192/248
.699/.665
395/258
65.3%
79.2/95
235/281
.683/.605
452/289
63.9%
90.6/106
269/315
.652/.565
499/326
65.3%
100/120
296/355
.617/.546
517/338
65.4%
104/124
307/369
.559/.495
540/343
63.5%
108/126
321/374
.519/.447
----390/263
67.3%
1.10/1.96
.510/.377
Sonny's Brodix 14.5 Deg SF600 Alum548/2042.52/1.86
4.625
73-77--------555/378
68.1%
111/139
330/412
.534/.492
-----
-
1.01/1.85
.510/.377
Sonny's Brodix 14.5 Deg Pontiac CNC SF600 Alum548/2042.48/1.92
4.60
77--------548/378
69%
113/131
336/387
.535/.477
-----
-
1.00/1.85
.502/.389
Sonny's Brodix 14.5 Deg Pontiac Marine Alum494/1842.48/1.90
4.60
N/A------514/-
106
315
.646
538/-
111
330
.591
-----526
-
1.09
.502/.385
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Sonny's Hemi AlumN/A2.55/1.9665-95--------570/390
68.4%
112/129
331/383
.541/.482
-----
-
-
.516/.397
Sonny's Hemi AlumN/A2.55/2.0065-95--------570/400
70.2%
112/127
331/377
.541/.484
-----
-
-
.516/.405
Sonny's Hemi AlumN/A2.66/2.0078-------560/375
67%
101/119
299/354
.574/.511
------
-
-
.539/.405
Sonny's Hemi AlumN/A2.66/2.00N/A----------610/422
69.2%
110/134
325/398
.455/.418
---
-
-
.539/.405
Sonny's Hemi 5.0 Inch BS AlumN/A2.68/2.04N/A----------615/425
69.1%
109/130
323/385
.455/.413
---
-
-
.543/.413
Sonny's Hemi 5.3 Inch BS AlumN/A2.80/2.10N/A----------700/480
68.6%
114/139
337/411
.496/.453
---
-
-
.567/.425
Sonny's Hemi 5.x Inch BS Alum680/2402.90/2.10N/A------------740/475
64.2%
112/137
332/406
.428/.379
-
-
1.09/1.98
.587/.425
Sonny's Symmetrical 5.0 Inch BS SF1020 Alum650/3502.75/2.00N/A-----------/450660/-
111
329
.436
--
-
1.02
.557/.405
Sonny's Symmetrical 5.3 Inch BS SF1020 AlumN/A2.75/2.00N/A-----------/450660/-
111
329
.436
--
-
-
.557/.405
Sonny's Symmetrical 5.3 Inch BS 16 x 5 Deg Alum737/2902.725/2.05N/A-----------/462700/-
120
356
.467
--
-
0.95
.552/.415
Sonny's Symmetrical 16 x 5 Deg 5.0 Inch BS Billet Alum540/2362.52/1.93
4.67
94--------562/400
71.2%
113/137
334/405
.54/.502
-----
-
1.04/1.69
.510/.391
Sonny's Symmetrical 16 x 5 Deg 5.0 Inch BS Alum570/2362.52/1.93
4.67
94--------562/400
71.2%
113/137
334/405
.54/.502
-----
-
0.99/1.69
.510/.391
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Sonny's Symmetrical 13 x 5 Deg Alum574/2362.55/1.93
4.75
74-75-------550/375
68.2%
108/128
319/380
.588/.53
580/407
70.2%
114/139
336/412
.551/.511
----565/391
69.2%
1.01/1.72
.516/.391
Sonny's Symmetrical 13 Deg Marine Alum547/2212.52/1.90
4.67
84------536/366
68.3%
107/129
318/382
.662/.60
556/381
68.5%
111/134
330/398
.601/.546
-----546/374
68.4%
1.02/1.72
.510/.385
Sonny's 11 Deg AlumN/A2.65/1.89
4.75
N/A--------605/395
65.3%
110/141
325/417
.553/.506
-----
-
-
.537/.383
Sonny's 11 x 7 Deg 5.0 Inch BS AlumN/A2.62/1.90N/A--------590/400
67.8%
109/141
324/418
.546/.51
-----
-
-
.531/.385
Sonny's 5.0 Inch BS Alum574/2362.55/1.93
4.75
75--------580/407
70.2%
114/139
336/412
.551/.511
-----
-
1.01/1.72
.516/.391
Sonny's 5.0 Inch BS AlumN/A2.65/1.89
4.75
N/A--247/185
74.9%
44.8/65.9
133/195
.677/.711
327/249
76.1%
59.3/88.8
176/263
.673/.718
404/291
72%
73.2/104
217/307
.665/.671
476/326
68.5%
86.3/116
256/344
.653/.627
537/359
66.9%
97.4/128
288/379
.631/.592
578/378
65.4%
105/135
311/399
.594/.545
-610/402
65.9%
111/143
328/425
.502/.464
---454/313
68.9%
-
.537/.383
Steve Schmidt Pro-Filer 12 DegN/A2.40/1.88N/A-------495/365
73.7%
109/131
324/390
.562/.529
518/376
72.6%
115/135
339/401
.523/.484
518/376
72.6%
115/135
339/401
.471/.436
---510/372
73%
-
.486/.381
Steve Schmidt Pro-filer 12 Deg NitrousN/A-N/A-------515/390
75.7%
-
525/405
77.1%
-
525/412
78.5%
-
---522/402
77.1%
Steve Schmidt Pro-Filer 24 Deg Alum336/-2.30/1.88N/A--------415/303
73%
99.9/109
296/323
.437/.39
-----
-
1.24
.466/.381
Trick Flow Oval SF600 Alum280/1292.19/1.88
4.25
2" Pipe
11374/64
86.5%
160/113
70.6%
231/146
63.2%
61.3/52.6
182/156
.767/.564
275/178
64.7%
73/64.1
216/190
.684/.516
316/209
66.1%
83.9/75.3
249/223
.629/.485
336/240
71.4%
89.2/86.5
264/256
.557/.464
347/264
76.1%
92.1/95.1
273/282
.493/.437
------278/192
69.1%
1.24/2.05
.443/.381
Trick Flow Oval CCM Alum280/-2.30/1.88
-
Pipe
11369/61
88.4%
141/126
89.4%
209/159
76.1%
50.3/57.3
149/170
.66/.615
260/192
73.8%
62.6/69.2
185/205
.616/.557
292/221
75.7%
70.3/79.6
208/236
.554/.513
318/246
77.4%
76.5/88.6
227/263
.502/.475
325/264
81.2%
78.2/95.1
232/282
.44/.437
------258/201
78.2%
1.16
.466/.381
Trick Flow Oval CNC Inlet & Bowl Blend Alum280/1292.19/1.88
-
Pipe
11374/64
86.5%
160/113
70.6%
231/146
63.2%
61.3/52.6
182/156
.767/.564
275/178
64.7%
73/64.1
216/190
.684/.516
316/209
66.1%
83.9/75.3
249/223
.629/.485
336/240
71.4%
89.2/86.5
264/256
.557/.464
347/264
76.1%
92.1/95.1
273/282
.493/.437
------278/192
69.1%
1.24/2.05
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
Trick Flow R CNC Bowl Blend SF600 Alum320/1372.25/1.88
4.50
2" Pipe
12275/64
85.3%
155/125
80.6%
230/166
72.2%
57.8/59.8
171/177
.743/.642
282/202
71.6%
70.9/72.8
210/216
.683/.586
320/241
75.3%
80.5/86.8
238/257
.62/.559
348/270
77.6%
87.5/97.3
259/288
.562/.522
360/290
80.6%
90.5/104
268/310
.498/.48
362/301
83.1%
91/108
270/321
.438/.436
-----294/228
77.5%
1.13/2.20
.456/.381
Trick Flow CNC SF600 Alum320/1372.25/1.88
-
No Pipe
12173/64
87.7%
146-145/118
81.1%
222-220/160
72.4%
55.6/57.6
165/171
.714/.618
279-276/188
67.7%
69.8/67.7
207/201
.672/.545
318-315/215
67.9%
79.6/77.5
236/229
.613/.499
342-339/238
69.9%
85.6/85.7
254/254
.55/.46
359-352/258
72.6%
89.4/92.9
265/275
.492/.427
363-356/268
74.5%
90.4/96.5
268/286
.435/.388
-----288/206
71.7%
1.12/1.96
.456/.381
Trick Flow CNC 320 Weingartner Racing AlumN/A2.25/1.88
4.31
No Pipe
N/A-150-149/120
80.3%
220-213/160
73.9%
54.5/57.6
161/171
.699/.618
266-263/196
74.1%
66.5/70.6
197/209
.641/.568
309-308/230
74.6%
77.6/82.9
230/245
.598/.533
339-330/255
76.2%
84.1/91.9
249/272
.54/.493
354-347/267
76.2%
88.2/96.2
261/285
.485/.442
362-357/274
76.2%
90.4/98.7
268/292
.435/.397
367-362/282
77.4%
91.7/102
272/301
.392/.363
362-373/283
77%
92.4/102
274/302
.356/.328
---302/230
76.1%
-
.456/.381
Trick Flow CNC 320 Weingartner Racing AlumN/A2.25/1.88
4.625
No Pipe
N/A-149-151/121
80.7%
225/159
70.7%
56.6/57.3
168/170
.727/.615
274-277/196
71.1%
69.3/70.6
205/209
.667/.568
323-315/230
72.1%
80.2/82.9
238/245
.618/.533
348-338/253
73.8%
86.3/91.1
256/270
.554/.489
357/265
74.2%
89.8/95.5
266/283
.494/.439
355-370/273
75.3%
91.2/98.3
270/291
.439/.396
362-378/278
75.1%
93.1/100
276/297
.398/.358
367-381/282
75.4%
94.1/102
279/301
.362/.327
---308/229
74.1%
-
.456/.381
Trick Flow R CNC Bowl Blend SF600 Alum340/1372.25/1.88
-
Pipe
12277/64
83.1%
160/125
78.1%
230/166
72.2%
57.8/59.8
171/177
.743/.642
283/202
71.4%
71.2/72.8
211/216
.686/.586
323/241
74.6%
81.2/86.8
241/257
.626/.559
350/270
77.1%
88/97.3
261/288
.565/.522
366/290
79.2%
92.1/104
273/310
.507/.48
370/301
81.4%
93.1/108
276/321
.448/.436
-----297/228
76.6%
1.09/2.20
.456/.381
Trick Flow R CNC Bowl Blend SF600 Alum360/1372.30/1.88
4.50
2" Pipe
12275/64
85.3%
151/125
82.8%
227/166
73.1%
54.6/59.8
162/177
.717/.642
283/202
71.4%
68.1/72.8
202/216
.671/.586
325/241
74.2%
78.2/86.8
232/257
.616/.559
362/270
74.6%
87.1/97.3
258/288
.572/.522
382/290
75.9%
91.9/104
272/310
.517/.48
390/301
77.2%
93.9/108
278/321
.462/.436
-----303/228
75.2%
1.08/2.20
.466/.381
World Oval Port Iron CHP260/-2.25/1.8811971/50
70.4%
145/105
72.4%
205/146
71.2%
51.6/52.6
153/156
.662/.564
243/173
71.2%
61.1/62.3
181/185
.589/.502
267/190
71.2%
67.2/68.4
199/203
.517/.441
280/203
72.5%
70.4/73.1
209/217
.452/.392
282/209
74.1%
70.9/75.3
210/223
.39/.346
283/214
75.6%
71.2/77.1
211/228
.343/.31
-----244/177
72.7%
1.09
.456/.381
World 02003 Kendrick Auto Alum310/-2.25/1.8811681/70
86.4%
151/115
76.2%
223/179
80.3%
56.1/64.5
166/191
.72/.692
276/179
64.9%
69.4/64.5
206/191
.669/.519
308/192
62.3%
77.5/69.2
230/205
.597/.445
317/198
62.5%
79.7/71.3
236/211
.512/.383
321/201
62.6%
80.7/72.4
239/215
.444/.333
------266/177
66.7%
1.04
.456/.381
World 02003 Ported Kendrick Auto Alum310/-2.25/1.8811687/71
81.6%
160/123
76.9%
230/186
80.9%
57.8/67
171/199
.743/.719
288/187
64.9%
72.4/67.4
215/200
.698/.542
323/211
65.3%
81.2/76
241/225
.626/.489
348/240
69%
87.5/86.5
259/256
.562/.464
353/253
71.7%
88.8/91.1
263/270
.489/.419
------284/200
70.5%
1.14
.456/.381
World 03003 Kendrick Auto Iron310/-2.25/1.88N/A72/70
97.2%
151/120
79.5%
229/152
66.4%
57.6/54.8
171/162
.74/.588
273/182
66.7%
68.7/65.6
203/194
.661/.528
308/195
63.3%
77.5/70.2
230/208
.597/.452
321/201
62.6%
80.7/72.4
239/215
.518/.388
326/206
63.2%
82/74.2
243/220
.451/.341
------268/176
65.7%
1.05
.456/.381
World 03003 Ported Kendrick Auto Iron310/-2.25/1.88N/A90/70
77.8%
172/119
69.2%
258/170
65.9%
64.9/61.2
192/181
.833/.657
285/194
68.1%
71.7/69.9
212/207
.69/.562
326/221
67.8%
82/79.6
243/236
.632/.513
353/240
68%
88.8/86.5
263/256
.57/.464
368/256
69.6%
92.6/92.2
274/273
.509/.424
------294/200
68.1%
1.19
.456/.381
World Merlin Ported Bullet Cylinder HeadsN/A2.19/1.88N/A80/72
90%
153/121
79.1%
214/163
76.2%
56.8/58.7
168/174
.71/.63
253/202
79.8%
67.2/72.8
199/216
.63/.586
303/233
76.9%
80.4/83.9
238/249
.603/.54
334/250
74.9%
88.7/90.1
263/267
.554/.483
354/263
74.3%
94/94.7
278/281
.503/.436
------269/205
76.5%
-
.443/.381
Manufacturer
Part Number
Port/Vol
Int/Exh
Valve Size Int/Exh Comb. Chamber Vol .100 .200 .300 .400 .500 .600 .700 .800 .900 1.000 1.100 1.200 1.300 Average
World Merlin Iron CHP310/-2.25/1.88
4.25
2.25" Pipe
N/A-158/100
63.3%
216/141
65.3%
54.3/50.8
161/151
.698/.545
258/175
67.8%
64.9/63
192/187
.625/.507
292/193
66.1%
73.4/69.5
218/206
.566/.448
313/207
66.1%
78.7/74.6
233/221
.505/.40
325/213
65.5%
81.7/76.7
242/227
.45/.353
327/222
67.9%
82.2/80
244/237
.396/.322
-----270/179
66.2%
1.05
.456/.381
World Merlin Alum CHP310/1322.25/1.88
4.25
2.25" Pipe
N/A-144/129
89.6%
217/173
79.7%
54.6/62.3
162/185
.701/.669
269/195
72.5%
67.7/70.2
200/208
.652/.565
289/207
71.6%
72.7/74.6
215/221
.56/.48
296/214
72.3%
74.4/77.1
221/228
.478/.414
305/214
70.2%
76.7/77.1
227/228
.422/.355
312/214
68.6%
78.5/77.1
233/228
.378/.31
-----262/192
73.5%
1.01/1.62
.456/.381
World Merlin II Weingartner Racing BrezN/A2.30/1.88
4.31
No Pipe
N/A79/57
72.2%
159/104
65.4%
237/150
63.3%
57/54
169/160
.749/.58
282/186
66%
67.9/67
201/199
.668/.539
330/212
64.2%
79.4/76.4
235/226
.626/.492
354/229
64.7%
85.2/82.5
252/244
.559/.443
366/240
65.6%
88.1/86.5
261/256
.496/.398
353/255
72.2%
85/91.9
252/272
.418/.37
-----297/197
66.1%
-
.466/.381
World Merlin 269 SF600 Iron269/1372.19/1.88
-
No Pipe
11975/65
86.7%
144/121
84%
213/165
77.5%
56.5/59.4
168/176
.707/.638
275/202
73.5%
73/72.8
216/216
.684/.586
323/239
74%
85.7/86.1
254/255
.643/.554
352/262
74.4%
93.4/94.4
277/280
.584/.506
355/274
77.2%
94.2/98.7
279/292
.505/.454
341/282
82.7%
90.5/102
268/301
.424/.409
-----286/221
77.1%
1.32/2.06
.443/.381
World Merlin 310 SF600 Iron310/1372.30/1.88
-
No Pipe
11979/59
74.7%
144/99
68.8%
208/151
72.6%
50.1/54.4
148/161
.657/.584
267/193
72.3%
64.3/69.5
190/206
.633/.56
321/232
72.3%
77.3/83.6
229/248
.609/.538
363/259
71.3%
87.4/93.3
259/276
.573/.501
383/276
72.1%
92.2/99.4
273/295
.519/.457
374/286
76.5%
90/103
267/305
.443/.415
-----294/214
72.6%
1.24/2.09
.466/.381
World Merlin 345 SF600 Iron345/1372.30/1.88
-
No Pipe
11977/60
77.9%
145/102
70.3%
213/159
74.6%
51.3/57.3
152/170
.673/.615
271/204
75.3%
65.2/73.5
193/218
.642/.591
326/239
73.3%
78.5/86.1
232/255
.618/.554
366/261
71.3%
88.1/94
261/279
.578/.504
389/275
70.7%
93.6/99.1
277/294
.527/.456
374/284
75.9%
90/102
267/303
.443/.412
-----298/218
73.1%
1.13/2.07
.466/.381
World Merlin 320 SF600 Alum320/-2.30/1.88
-
No Pipe
11977/69
89.6%
148/120
81.1%
218/155
71.1%
52.5/55.8
155/165
.689/.599
278/185
66.5%
66.9/66.6
198/197
.659/.536
320/215
67.2%
77/77.5
228/229
.607/.499
352/242
68.8%
84.7/87.2
251/258
.556/.468
372/263
70.7%
89.5/94.7
265/281
.504/.436
375/280
74.7%
90.3/101
267/299
.444/.406
-----295/209
70.8%
1.17
.466/.381
World Merlin 345 SF600 Alum345/-2.30/1.88
-
No Pipe
11982/71
86.6%
153/108
70.6%
221/151
68.3%
53.2/54.4
158/161
.698/.584
284/184
64.8%
68.4/66.3
203/196
.673/.533
331/217
65.6%
79.7/78.2
236/232
.628/.503
369/245
66.4%
88.8/88.3
263/262
.583/.474
399/267
66.9%
96/96.2
285/285
.54/.442
414/284
68.6%
99.6/102
295/303
.491/.412