The following article is broken down into four sections, click on each to link to that section:
1 - Cast Iron Head Flow Data
2 - Aluminum Head Flow Data
3 - Cleveland Style Head Flow Data
4 - Definitions
I have tried to compile many different sources of flow bench data so one could see what they could expect from a given set of heads. As new data becomes available it will be added to the charts. To print --> set your printer for "Landscape mode" (i.e. make it print sideways on a page), this should give you all the data.
Note: all flows are given in cubic feet per minute (cfm) and taken with a port pressure differential of 28" of water.
|
Head Casting
|
I / E
|
Valve
Size
|
Lift
|
Port Configuration
|
Source
|
|
0.100
|
0.200
|
0.300
|
0.400
|
0.500
|
0.600
|
0.700
|
0.800
|
| SVO J302 AR |
I
|
2.02
|
67
|
128
|
189
|
232
|
263
|
278
|
284
|
-
|
Pro Porter |
Super Ford - Sept. 1991 |
| SVO J302 AR |
E
|
1.60
|
51
|
105
|
149
|
184
|
213
|
221
|
227
|
-
|
Pro Porter |
Super Ford - Sept. 1991 |
| SVO J302 AR |
I
|
2.02
|
63
|
120
|
165
|
191
|
210
|
210
|
200
|
-
|
Stock |
Super Ford - Aug. 1989 |
| SVO J302 AR |
E
|
1.60
|
52
|
104
|
119
|
135
|
140
|
143
|
144
|
-
|
Stock |
Super Ford - Aug. 1989 |
| SVO J302 AR |
I
|
2.02
|
62
|
123
|
180
|
220
|
246
|
252
|
253
|
-
|
Stage 3 |
Super Ford - Aug. 1989 |
| SVO J302 AR |
E
|
1.60
|
60
|
110
|
161
|
188
|
201
|
204
|
206
|
-
|
Stage 3 |
Super Ford - Aug. 1989 |
| |
| Ford GT40 Aluminum (1968 version) |
I
|
1.88
|
54
|
108
|
156
|
183
|
197
|
-
|
-
|
-
|
Stock |
Super Ford - April 1991 |
| Ford GT40 Aluminum (1968 version) |
E
|
1.62
|
45
|
91
|
124
|
139
|
149
|
-
|
-
|
-
|
Stock |
Super Ford - April 1991 |
| |
| SVO GT40 Aluminum |
I
|
1.94
|
64.2
|
114.3
|
166.5
|
199.4
|
212.5
|
217.4
|
-
|
-
|
Stock |
MM&FF - Aug. 1997 |
| SVO GT40 Aluminum |
E
|
1.54
|
52.3
|
97.7
|
128
|
136.5
|
134.1
|
-
|
-
|
-
|
Stock |
MM&FF - Aug. 1997 |
| SVO GT40 Aluminum |
I
|
1.94
|
64
|
127
|
180
|
190
|
210
|
202
|
-
|
-
|
Stock |
The Corral Website |
| SVO GT40 Aluminum |
E
|
1.60
|
58
|
108
|
144
|
153
|
156
|
159
|
-
|
-
|
Stock |
The Corral Website |
| SVO GT40 Aluminum |
I
|
1.94
|
83
|
146
|
204
|
234
|
246
|
250
|
-
|
-
|
Stage 3 |
The Corral Website |
| SVO GT40 Aluminum |
E
|
1.60
|
80
|
122
|
158
|
188
|
194
|
-
|
-
|
-
|
Stage 3 |
The Corral Website |
| |
| SVO GT40X Aluminum |
I
|
1.94
|
65.2
|
126.7
|
172.5
|
202.5
|
216.0
|
214.8
|
-
|
-
|
Stock |
Mustang & Ford - Dec. 1999 |
| SVO GT40X Aluminum |
E
|
1.54
|
52.7
|
105.3
|
145.3
|
149.4
|
149.1
|
149.1
|
-
|
-
|
Stock |
Mustang & Fords - Dec. 1999 |
| SVO GT40X Aluminum |
I
|
1.94
|
65.8
|
129.5
|
181.5
|
222
|
243
|
-
|
-
|
-
|
Stock |
MM&FF - Aug. 1997 |
| SVO GT40X Aluminum |
E
|
1.54
|
62.1
|
109.1
|
147
|
164
|
172.3
|
-
|
-
|
-
|
Stock |
MM&FF - Aug. 1997 |
| SVO GT40X Aluminum |
I
|
1.94
|
54.6
|
107.8
|
159.5
|
197.2
|
217.4
|
227.8
|
234.5
|
-
|
Stock |
MM&FF - Jan. 1998 |
| SVO GT40X Aluminum |
E
|
1.54
|
53.1
|
110.2
|
144.7
|
150.3
|
150.4
|
149.4
|
149.7
|
-
|
Stock |
MM&FF - Jan. 1998 |
| SVO GT40X Aluminum |
I
|
1.94
|
53
|
113.5
|
169.6
|
206.5
|
225.6
|
230.1
|
-
|
-
|
Stock |
5.0 Mustang - Feb. 1998 |
| SVO GT40X Aluminum |
E
|
1.54
|
49.9
|
106
|
138.8
|
152.8
|
159
|
160.6
|
-
|
-
|
Stock |
5.0 Mustang - Feb. 1998 |
| SVO GT40X Aluminum |
I
|
1.94
|
63.4
|
120.9
|
178.4
|
219.7
|
238.9
|
236
|
-
|
-
|
Street Port Job |
5.0 Mustang - Feb. 1998 |
| SVO GT40X Aluminum |
E
|
1.54
|
53
|
112.3
|
151.3
|
187.2
|
198.1
|
201.2
|
-
|
-
|
Street Port Job |
5.0 Mustang - Feb. 1998 |
| |
| TFS Street Heat (Will-Burt) |
I
|
2.02
|
66
|
133
|
185
|
213
|
225
|
228
|
229
|
-
|
Stock |
Super Ford - Aug. 1989 |
| TFS Street Heat (Will-Burt) |
E
|
1.60
|
58
|
80
|
107
|
122
|
132
|
140
|
144
|
-
|
Stock |
Super Ford - Aug. 1989 |
| TFS Street Heat (Will-Burt) |
I
|
1.94
|
65
|
130
|
198
|
241
|
261
|
270
|
275
|
-
|
Stage 3 |
MM&FF - Aug. 1997 |
| TFS Street Heat (Will-Burt) |
E
|
1.60
|
54
|
114
|
154
|
182
|
189
|
189
|
189
|
-
|
Stage 3 |
MM&FF - Aug. 1997 |
| TFS Street Heat (Will-Burt) |
I
|
2.02
|
66
|
139
|
202
|
240
|
254
|
268
|
272
|
-
|
Stage 3 |
Super Ford - Aug. 1989 |
| TFS Street Heat (Will-Burt) |
E
|
1.60
|
61
|
118
|
168
|
196
|
207
|
210
|
212
|
-
|
Stage 3 |
Super Ford - Aug. 1989 |
| TFS Street Heat (Will-Burt) |
I
|
2.02
|
-
|
137
|
186
|
215
|
224
|
228
|
-
|
-
|
Stock |
Super Ford - March 1991 |
| TFS Street Heat (Will-Burt) |
E
|
1.60
|
-
|
100
|
125
|
150
|
162
|
168
|
-
|
-
|
Stock |
Super Ford - March 1991 |
| TFS Street Heat (Will-Burt) |
I
|
2.02
|
72
|
138
|
181
|
207
|
220
|
230
|
-
|
-
|
Stock |
MM&FF - Feb. 1998 |
| TFS Street Heat (Will-Burt) |
E
|
1.60
|
48
|
78
|
100
|
125
|
135
|
140
|
-
|
-
|
Stock |
MM&FF - Feb. 1998 |
| TFS Street Heat (Will-Burt) |
I
|
2.02
|
60
|
125
|
185
|
220
|
260
|
275
|
-
|
-
|
Stage 3 (Hand Ported) |
MM&FF - Feb. 1998 |
| TFS Street Heat (Will-Burt) |
E
|
1.60
|
54
|
80
|
105
|
130
|
160
|
180
|
-
|
-
|
Stage 3 (Hand Ported) |
MM&FF - Feb. 1998 |
| TFS Street Heat (Will-Burt) |
I
|
2.02
|
60
|
125
|
188
|
230
|
268
|
280
|
-
|
-
|
Stage 3 (Extrude honed) |
MM&FF - Feb. 1998 |
| TFS Street Heat (Will-Burt) |
E
|
1.60
|
57
|
100
|
140
|
175
|
185
|
190
|
-
|
-
|
Stage 3 (Extrude honed) |
MM&FF - Feb. 1998 |
| |
| TFS Twisted Wedge |
I
|
2.02
|
63
|
141
|
205
|
233
|
251
|
251
|
-
|
-
|
Stock |
MM&FF - Aug. 1997 |
| TFS Twisted Wedge |
E
|
1.60
|
53
|
107
|
144
|
171
|
187
|
193
|
-
|
-
|
Stock |
MM&FF - Aug. 1997 |
| TFS Twisted Wedge |
I
|
2.02
|
67.8
|
132.7
|
199.1
|
240.4
|
252.5
|
243.3
|
-
|
-
|
Stock |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge |
E
|
1.60
|
56.2
|
106.1
|
141.9
|
173.1
|
191.9
|
201.2
|
-
|
-
|
Stock |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge |
I
|
2.02
|
61
|
125
|
187
|
226
|
241
|
-
|
-
|
-
|
Stock - FPS (undercut stems) |
The Corral Website |
| TFS Twisted Wedge |
E
|
1.60
|
58
|
104
|
139
|
166
|
187
|
-
|
-
|
-
|
Stock (undercut stems) |
The Corral Website |
| TFS Twisted Wedge |
I
|
2.02
|
-
|
-
|
-
|
233
|
254
|
254
|
-
|
-
|
Stock - DSA (undercut stems) |
The Corral Website |
| TFS Twisted Wedge |
I
|
2.02
|
74
|
130
|
188
|
231
|
254
|
256
|
-
|
-
|
Stage 1 |
Super Ford - May 1999 |
| TFS Twisted Wedge |
E
|
1.60
|
58
|
125
|
156
|
182
|
198
|
212
|
-
|
-
|
Stage 1 |
Super Ford - May 1999 |
| TFS Twisted Wedge |
I
|
2.02
|
74
|
142
|
198
|
243
|
263
|
264
|
260
|
-
|
Stage 2 |
Super Ford - May 1999 |
| TFS Twisted Wedge |
E
|
1.60
|
58
|
126
|
160
|
188
|
209
|
220
|
225
|
-
|
Stage 2 |
Super Ford - May 1999 |
| TFS Twisted Wedge |
I
|
2.02
|
-
|
130
|
182
|
248
|
271
|
288
|
288
|
-
|
Stage 3 |
The Corral Website |
| TFS Twisted Wedge |
E
|
1.60
|
-
|
115
|
134
|
160
|
193
|
210
|
-
|
-
|
Stage 3 |
The Corral Website |
| TFS Twisted Wedge |
I
|
2.05
|
75
|
146
|
203
|
249
|
276
|
289
|
300
|
-
|
Stage 3 |
Super Ford - May 1999 |
| TFS Twisted Wedge |
E
|
1.625
|
57
|
126
|
166
|
196
|
216
|
228
|
240
|
-
|
Stage 3 |
Super Ford - May 1999 |
| |
| Air Flow Research 165cc |
I
|
1.90
|
-
|
123
|
186
|
225
|
250
|
250
|
-
|
-
|
Stock |
AFR Catalog - 1998 |
| Air Flow Research 165cc |
E
|
1.60
|
-
|
118
|
153
|
178
|
185
|
191
|
-
|
-
|
Stock |
AFR Catalog - 1998 |
| Air Flow Research 185cc |
I
|
2.02
|
-
|
129
|
189
|
224
|
267
|
282
|
-
|
-
|
Stock |
AFR Catalog - 1998 |
| Air Flow Research 185cc |
E
|
1.60
|
-
|
118
|
153
|
178
|
185
|
191
|
-
|
-
|
Stock |
AFR Catalog - 1998 |
| |
| Avenger |
I
|
2.02
|
70.3
|
140.2
|
194.5
|
226.4
|
253.4
|
265.1
|
268
|
271
|
Stock |
FPS Catalog - 1999 |
| Avenger |
E
|
1.60
|
63.4
|
103.4
|
139.7
|
164.2
|
185.9
|
193
|
196.5
|
205.4
|
Stock |
FPS Catalog - 1999 |
| Avenger |
I
|
2.02
|
70
|
150
|
204
|
242
|
262
|
272
|
275
|
-
|
Stock |
MM&FF - Jan. 1998 |
| Avenger |
E
|
1.60
|
54
|
102
|
132
|
171
|
190
|
201
|
204
|
-
|
Stock |
MM&FF - Jan. 1998 |
| |
| Brondix Track 1 |
I
|
2.02
|
67
|
127
|
173
|
216
|
243
|
253
|
-
|
-
|
Stage 1 |
Super Ford - May 1999 |
| Brondix Track 1 |
E
|
1.60
|
67
|
111
|
145
|
170
|
190
|
200
|
-
|
-
|
Stage 1 |
Super Ford - May 1999 |
| Brondix Track 1 |
I
|
2.08
|
73
|
125
|
177
|
229
|
267
|
284
|
298
|
-
|
Stage 2 |
Super Ford - May 1999 |
| Brondix Track 1 |
E
|
1.60
|
69
|
118
|
151
|
179
|
201
|
217
|
229
|
-
|
Stage 2 |
Super Ford - May 1999 |
| Brondix Track 1 |
I
|
2.08
|
73
|
143
|
200
|
249
|
284
|
308
|
317
|
-
|
Stage 3 |
Super Ford - May 1999 |
| Brondix Track 1 |
E
|
1.625
|
64
|
121
|
169
|
200
|
222
|
235
|
252
|
-
|
Stage 3 |
Super Ford - May 1999 |
| Brondix Track 1 |
I
|
-
|
-
|
136
|
194
|
247
|
287
|
312
|
315
|
-
|
CNC ported |
M2race Systems |
| Brondix Track 1 |
E
|
-
|
-
|
115
|
156
|
198
|
214
|
220
|
225
|
-
|
CNC ported |
M2race Systems |
| |
| Edelbrock Performer 5.0 |
I
|
1.90
|
72
|
131
|
185
|
214
|
223
|
226
|
-
|
-
|
Stock |
Edelbrock |
| Edelbrock Performer 5.0 |
E
|
1.60
|
57
|
105
|
131
|
156
|
168
|
175
|
-
|
-
|
Stock |
Edelbrock |
| Edelbrock Performer |
I
|
2.02
|
70
|
128
|
183
|
219
|
229
|
226
|
-
|
-
|
Stock |
Edelbrock |
| Edelbrock Performer |
E
|
1.60
|
57
|
104
|
142
|
163
|
172
|
174
|
-
|
-
|
Stock |
Edelbrock |
| Edelbrock Performer |
I
|
2.02
|
66
|
137
|
229
|
268
|
288
|
-
|
-
|
-
|
Ported |
MV Performance |
| Edelbrock Performer |
E
|
1.60
|
58
|
110
|
155
|
186
|
209
|
222
|
-
|
-
|
Ported |
MV Performance |
| |
| Edelbrock Victor Jr. |
I
|
2.05
|
63.8
|
127.3
|
177.0
|
229.2
|
268.8
|
288.0
|
-
|
-
|
Stock |
Mustang & Fords - Dec. 1999 |
| Edelbrock Victor Jr. |
E
|
1.60
|
54.1
|
106.8
|
151.6
|
181.5
|
205.0
|
217.5
|
-
|
-
|
Stock |
Mustang & Fords - Dec. 1999 |
| Edelbrock Victor Jr. |
I
|
2.05
|
64
|
127
|
186
|
234
|
268
|
291
|
285
|
-
|
Stock |
Edelbrock |
| Edelbrock Victor Jr. |
E
|
1.60
|
54
|
108
|
140
|
167
|
189
|
195
|
199
|
-
|
Stock |
Edelbrock |
| Edelbrock Victor Jr. |
I
|
2.05
|
68
|
120
|
165
|
220
|
262
|
273
|
-
|
-
|
Stage 1 |
Super Ford - May 1999 |
| Edelbrock Victor Jr. |
E
|
1.60
|
67
|
115
|
148
|
174
|
200
|
208
|
-
|
-
|
Stage 1 |
Super Ford - May 1999 |
| Edelbrock Victor Jr. |
I
|
2.05
|
72
|
131
|
190
|
240
|
278
|
297
|
290
|
-
|
Stage 2 |
Super Ford - May 1999 |
| Edelbrock Victor Jr. |
E
|
1.60
|
70
|
115
|
152
|
179
|
210
|
223
|
230
|
-
|
Stage 2 |
Super Ford - May 1999 |
| Edelbrock Victor Jr. |
I
|
2.08
|
75
|
135
|
202
|
245
|
285
|
302
|
315
|
-
|
Stage 3 |
Super Ford - May 1999 |
| Edelbrock Victor Jr. |
E
|
1.625
|
72
|
128
|
168
|
201
|
222
|
230
|
239
|
-
|
Stage 3 |
Super Ford - May 1999 |
| |
| Edelbrock 7721 Victor |
I
|
2.13
|
64.3
|
135.5
|
198.2
|
248
|
289.2
|
310.4
|
307.4
|
-
|
Valve Job Only |
MM&FF - Jan. 1998 |
| Edelbrock 7721 Victor |
E
|
1.63
|
59.7
|
107.5
|
152.7
|
184.2
|
199.8
|
209.3
|
209.3
|
-
|
Valve Job Only |
MM&FF - Jan. 1998 |
| Edelbrock 7721 Victor |
I
|
2.13
|
69.2
|
141.1
|
210
|
261.2
|
300.5
|
324.4
|
337.9
|
-
|
Basic Port Job |
MM&FF - Jan. 1998 |
| Edelbrock 7721 Victor |
E
|
1.63
|
60.1
|
115
|
160.2
|
192.8
|
217.8
|
232
|
240.2
|
-
|
Basic Port Job |
MM&FF - Jan. 1998 |
| Edelbrock 7721 Victor |
I
|
2.13
|
76
|
141
|
203
|
256
|
298
|
323
|
339
|
-
|
Bowl blend, port match |
Edelbrock |
| Edelbrock 7721 Victor |
E
|
1.63
|
67
|
110
|
152
|
187
|
210
|
215
|
220
|
-
|
Stage 3 |
Edelbrock |
| |
| TFS Twisted Wedge R |
I
|
2.08
|
68
|
147
|
205
|
242
|
275
|
296
|
305
|
-
|
Stock |
MM&FF - Aug. 1997 |
| TFS Twisted Wedge R |
E
|
1.60
|
50
|
102
|
146
|
178
|
200
|
212
|
222
|
-
|
Stock |
MM&FF - Aug. 1997 |
| TFS Twisted Wedge R |
I
|
2.08
|
66.6
|
128.7
|
190.9
|
239.7
|
270.8
|
281.9
|
297.4
|
284.1
|
Stock |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge R |
E
|
1.60
|
53
|
109
|
152.8
|
184.1
|
202.8
|
218.4
|
226.4
|
229.3
|
Stock |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge R |
I
|
2.08
|
69.3
|
133.4
|
190.7
|
237.3
|
261.4
|
280.9
|
284.6
|
-
|
Valve Job Only |
MM&FF - Jan. 1998 |
| TFS Twisted Wedge R |
E
|
1.60
|
59.2
|
112
|
152.6
|
179
|
198.4
|
214.9
|
225.2
|
-
|
Valve Job Only |
MM&FF - Jan. 1998 |
| TFS Twisted Wedge R |
I
|
2.08
|
66.6
|
159.8
|
208.6
|
253
|
286.3
|
308.5
|
321.9
|
319.6
|
Light port work, polish |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge R |
E
|
1.60
|
56.1
|
113.8
|
157.5
|
199.7
|
227.7
|
244.9
|
258.9
|
265.2
|
polish only |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge R |
I
|
2.08
|
76
|
135
|
190
|
246
|
268
|
279
|
298
|
-
|
Stage 1 |
Super Ford - May 1999 |
| TFS Twisted Wedge R |
E
|
1.60
|
67
|
118
|
158
|
174
|
192
|
208
|
219
|
-
|
Stage 1 |
Super Ford - May 1999 |
| TFS Twisted Wedge R |
I
|
2.08
|
71.4
|
133.9
|
196.2
|
249.7
|
282.8
|
301
|
308.4
|
-
|
Basic Port Job |
MM&FF - Jan. 1998 |
| TFS Twisted Wedge R |
E
|
1.60
|
62.7
|
112.6
|
154.9
|
181
|
201.7
|
214.2
|
224.9
|
-
|
Basic Port Job |
MM&FF - Jan. 1998 |
| TFS Twisted Wedge R |
I
|
2.08
|
76
|
141
|
200
|
253
|
277
|
295
|
309
|
-
|
Stage 2 |
Super Ford - May 1999 |
| TFS Twisted Wedge R |
E
|
1.60
|
68
|
124
|
160
|
185
|
202
|
220
|
230
|
-
|
Stage 2 |
Super Ford - May 1999 |
| TFS Twisted Wedge R |
I
|
2.08
|
66.6
|
162
|
208.6
|
255.3
|
284.1
|
306.3
|
326.3
|
337.4
|
max. porting, chamber modification |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge R |
E
|
1.60
|
56.1
|
113.8
|
157.5
|
199.7
|
227.7
|
244.9
|
258.9
|
265.2
|
polish only |
Super Ford - Jan. 1999 |
| TFS Twisted Wedge R |
I
|
2.10
|
78
|
151
|
214
|
265
|
292
|
309
|
327
|
-
|
Stage 3 |
Super Ford - May 1999 |
| TFS Twisted Wedge R |
E
|
1.625
|
64
|
121
|
169
|
200
|
222
|
235
|
252
|
-
|
Stage 3 |
Super Ford - May 1999 |
| |
| Avenger R |
I
|
2.08
|
80
|
135
|
182
|
231
|
272
|
296
|
302
|
-
|
Stock |
5.0 Mustang - Nov. 1997 |
| Avenger R |
E
|
1.60
|
65
|
95
|
128
|
145
|
168
|
179
|
202
|
-
|
Stock |
5.0 Mustang - Nov. 1997 |
