Updated: 7/4/2010
Added-sbf procomp 190cc, Brodix Sts 5.0 SBF
I have started this page to help people make a decesion on what head they should buy. All of these flow figures cam from my EZ flow bench using Performance Trends electronics. All flow numbers are achieved using a 4.125inch bore. I have not inflated the numbers. The numbers are the exact way they came from my bench. I have no favoritism for any one head. One note flow figures should not be the only thing to consider when choosing a head. Cylinder head flow is just on piece of the puzzle for horsepower. Another note is that no two flowbenches will ever read the same. That is why you cannot compare flow figures from two different benches. The best way to compare heads is to flow as many heads as you can on the same bench. That is why I encourage you to let me flow your heads. It costs only $5 and you leave knowing exactly how your heads flow compared to others. You can also have three sets of heads from the same manufacture and one will outflow the others. Let me flow your heads and you will know how good your head is. Some heads are flowed are on my Brezinski slider setup. The sbc bore for the Brezinski is 4.155 for BBC it is 4.310
Small block Chevy
Alan Johnson Racing
Alan Johnson 12degree 280cc runner 2.10/1.6 Brezenski fixture 4.155
Int Ex
.1-68 46
.2-129 78
.3-201 123
.4-272 167
.5-323 195
.6-354 216
.7-358 231
.8-359 240
Engine Quest (EQ)
Engine Quest 180cc new 64cc camber 30 degree back cut Brezinski 4.155 bore setup
INT EX
.1-73 64
.2-146 108
.3-195 132
.4-228 159
.5-243 178
.6-246 191
.7-250 196
Engine Quest 235cc new 64cc chamber 30degree back cut valves Brezinski 4.155 bore setup
INT EX
.1-74 64
.2-146 116
.3-245 150
.4-276 173
.5-295 190
.6-305 198
.7-310 204
Engine Quest 235cc intake runner 72cc chamber 2.08/1.6
INT EX
.1-70 55
.2-139 115
.3-199 171
.4-246 190
.5-282 199
.6-308 202
.7-313 204
Engine Quest 220cc intake 64cc chamber 2.02/1.6
INT EX
.1-75 49
.2-145 103
.3-204 136
.4-252 155
.5-278 171
.6-292 184
.7-296 191
Engine Quest 200cc 2.02/1.60 64cc chamber
INT EX
.1-64 48
.2-131 99
.3-186 132
.4-231 157
.5-252 176
.6-259 186
.7-259 191
.8-259 194
Engine Quest Torker 167cc intake 67cc chamber 2.02/1.6
INT EX
.1-70 64
.2-124 109
.3-173 158
.4-207 164
.5-230 167
.6-238 166
.7-241 166
Air Flow Research(AFR)
AFR 210cc non eliminator 2.08/1.6
INT EX
.1-70 55
.2-140 111
.3-199 150
.4-248 185
.5-276 206
.6-282 216
.7-291 221
.8-289 224
AFR eliminator 235cc heads 2.125/1.6
INT EX
.1-79 58
.2-169 117
.3-236 172
.4-275 205
.5-307 221
.6-323 232
.7-333 237
.8-339 241
.9-341 245
AFR eliminator 227cnc heads 2.10/1.6
INT EX
.1-69 58
.2-145 107
.3-212 160
.4-265 198
.5-296 214
.6-322 221
.7-321 225
.8-312 225
AFR 195cc old version 2.02/1.6
INT EX
.1-73 53
.2-146 108
.3-210 150
.4-258 176
.5-279 186
.6-273 191
.7-275 192
.8-297 193
Brownfeild AFR 227 2.10/1.625
INT Ex
.1-75 52
.2-142 90
.3-197 134
.4-252 165
.5-291 197
.6-306 213
.7-310 228
.8-310 230
World Products
Sportsman II 2.02/1.6
INT EX
.1-72 55
.2-133 97
.3-182 128
.4-228 145
.5-257 160
.6-264 183
.7-263 194
GM Stock Castings
Stock Chevy Vortec 062 1.94/1.50
INT EX
.1-73 61
.2-144 113
.3-202 145
.4-236 158
.450-248
.5-233 162
.6-233 165
Stock Chevy Vortec 906 1.94/1.50
INT Ex
.1-76 54
.2-137 106
.3-199 139
.4-239 152
.5-240 157
.6-241 159
Corvette L98 Aluminum 1.94/1.5
INT Ex
.1-60 70
.2-114 108
.3-174 152
.4-199 152
.5-205 166
.6-207 168
LT 1 290 Cast Iron 1.94/1.5
INT Ex
.1-73 52
.2-142 106
.3-205 138
.4-237 152
.5-236 157
.6-239 201
461 Double Humps Ported 2.02/1.6
INT EX
.1-66 55
.2-131 108
.3-185 137
.4-222 162
.5-240 174
.6-236 176
.7-234 175
Catalog GM 434 2.02/1.6
INT EX
.1-67 54
.2-126 104
.3-175 126
.4-209 132
.5-213 134
.6-216 133
.7-216 134
Alabama Cylinder head vortec head 1.94/1.50
INT EX
.1-60 55
.2-133 90
.3-192 123
.4-228 143
.5-234 153
.6-234 158
Dart
Dart Pro 1 215cc non platinum 2.055/1.6
INT EX
.1-65 52
.2-138 106
.3-198 138
.4-243 165
.5-273 178
.6-269 186
.7-268 189
.8-265 191
Dart Iron Eagle Platinum 2.055/1.6
INT EX
.1-64 53
.2-141 103
.3-182 139
.4-215 168
.5-241 185
.6-250 197
.7-248 204
.8-235 208
Dart 18degree CNC 2.14/1.6
INT EX
.1-80 52
.2-150 125
.3-220 161
.4-273 203
.5-311 226
.6-349 240
.7-338 248
Dart Iron Eagle Platinum 230cc 2.08/1.6
INT EX
.1-66 50
.2-130 115
.3-174 149
.4-226 178
.5-252 192
.6-277 201
.7-281 207
.8-280 211
Dart 335cnc ported BBC heads 2.30/1.88
INT EX
.1-66 54
.2-125 109
.3-203 151
.4-276 187
.5-322 223
.6-365 250
.7-395 266
.8-391 276
.9-380 281
1.0-383 284
Brodix
Brodix Trac 1 227cc CNC'd 2.08/1.6
INT EX
.1-70 58
.2-146 114
.3-214 163
.4-268 205
.5-298 221
.6-312 227
.7-318 235
RHS/Pro topline
RHS 220cc aluminum 64cc chamber 2.02/1.6 Brezinski 4.155 bore
INT EX
.1-73 55
.2-139 108
.3-194 139
.4-241 176
.5-273 192
.6-283 198
.7-284 201
.8-284 200
RHS Pro Torker 2.02/1.6 Brezinski 4.155 bore
INT EX
.1-70 54
.2-126 106
.3-186 143
.4-222 151
.5-254 154
.6-235 155
Pro Topline 235cc runner, cnc 64cc chamber 2.08/1.6
INT EX
.1-77 59
.2-134 110
.3-187 142
.4-236 168
.5-274 191
.6-306 200
.7-318 204
Procomp Electronics
Procomp 190cc 2.02/1.6 Aluminum old version
INT EX
.1-71 55
.2-130 110
.3-174 143
.4-217 157
.5-247 159
.6-250 157
.7-250 156
Procomp 190cc 2.02/1.6 Aluminum
INT Ex
.1-71 55
.2-127 104
.3-178 132
.4-222 165
.5-253 180
.6-279 181
.7-287 182
ProComp 210cc 2.02/1.6 new design Brenzenski 4.155 bore
INT EX
.1-62 49
.2-113 105
.3-160 136
.4-207 172
.5-250 187
.6-277 189
.7-284 189
Pro Comp 210cc cnc 2.02/1.6
.1-77 56
.2-157 112
.3-212 156
.4-240 183
.5-264 199
.6-278 208
.7-287 213
.8-290 216
LS series small block chevy heads
Gm 862 1.89/1.55 Brezinski 4.155 bore
INT EX
.1-64 47
.2-131 94
.3-179 122
.4-211 155
.5-233 175
.6-237 183
.7-241 187
L92 2.16/1.59 Brezinski 4.155 bore
INT EX
.1-66 56
.2-153 114
.3-221 160
.4-309 189
.5-330 203
.6-325 211
.7-332 214
6.0 Liter heads casting number 317, Valve job done 2.0/1.55 milled .030
INT EX
.1-74 60
.2-152 112
.3-211 148
.4-248 171
.5-267 184
.6-270 189
5.3 liter casting number 241
INT EX
.1-74 54
.2-156 106
.3-214 151
.4-252 176
.5-251 187
.6-256 191
.7-261 195
LS 4.8 liter 862 1.89/1.55
INT EX
.1-64 47
.2-131 94
.3-179 122
.4-211 155
.5-233 175
.6-237 183
.7-241 187
Big Block Chevy
AFR 325cc 2.30/1.88 Brezenski 4.310 bore
INT EX
.1-81 63
.2-166 137
.3-236 182
.4-293 226
.5-340 258
.6-358 274
.7-377 280
.8-383 282
.9-386 282
AFR 290cc cnc ported 2.25/1.88 Brezenski 4.310 bore
INT EX
.1-79 67
.2-167 141
.3-242 212
.4-298 248
.5-328 267
.6-356 274
.7-370 279
RHS Cast Iron Rectangle port 2.25/1.88
Brezinski 4.310
INT EX INT EX
.1-86 70 88 66
.2-183 139 167 133
.3-252 176 237 173
.4-303 205 288 206
.5-334 231 327 227
.6-341 243 350 246
.7-346 258 359 255
.8-346 264 355 261
Dart Aluminum 360cc 2.30/1.85
Brezenski 4.310
INT EX INT EX
.1-77 66 75 66
.2-154 107 166 107
.3-234 147 235 147
.4-288 183 283 183
.5-326 210 327 210
.6-360 230 351 230
.7-363 244 365 244
.8-368 250 378 257
BMF CNC ported 310cc 2.30/1.88
Brezenski 4.310 bore
INT EX INT EX
.1-77 68 78 63
.2-153 130 151 133
.3-235 176 219 171
.4-281 214 273 216
.5-323 248 317 258
.6-358 268 3