Here are the flow numbers on the old GT-40s along with a few of the other heads. These numbers are estimates since they used graphs in the magazine. (vl=valve lift, in=intake, ex=exhaust).
GT-40
vl- .100 .200 .300 .400 .500 .600
in- 60 115 160 180 190 190
ex- 50 90 120 125 126 126
GT-40P
vl- .100 .200 .300 .400 .500 .600
in- 55 110 152 180 185 190
ex- 40 75 100 118 122 126
GT-40X
vl- .100 .200 .300 .400 .500 .600 .700
in- 58 110 160 200 220 225 222
ex- 50 90 128 138 148 149 148
Brodix ST 5.0
vl- .100 .200 .300 .400 .500 .600 .700
in- 62 125 175 215 235 240 240
ex- 50 90 125 150 162 170 175
Holley (20 degree)
vl- .100 .200 .300 .400 .500 .600 .700
in- 60 125 178 222 215 216 220
ex- 40 100 130 147 150 151 149
TFS
vl- .100 .200 .300 .400 .500 .600 .700
in- 60 135 198 230 241 240 228
ex- 42 90 125 147 160 165 172
AFR 165
vl- .100 .200 .300 .400 .500 .600 .700
in- 55 119 175 215 235 247 244
ex- 50 110 150 175 183 185 187
This should give everyone an idea on the numbers they got from the flow bench.(Sorry if the numbers don't line up perfectly)
T.J.
------------------
1989 lx notch
89,000 miles
bolt-ons,stock heads/cam
60'- 2.07, 8.90@78, 13.93@99
[This message has been edited by TJR (edited 04-25-2001).]
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