Amount of CFM available from 452 heads, heavily ported
Regarding the heads in post #22...... in terms of BB Mopar heads.......if the choice is bigger valves ........ or........ a little well executed bowl/pinch work....... take the porting.
Doing both is best, but if you can only have one...... the porting wins.
Here is a test on a 346 head(same intake port as a 452).
-recondition seat(stones)
-reface OE valve, add back cut
-blend bowl & SSR, bullet nose guide boss
-open pinch to 1.060”
Lift———I/E
.100—- 70/56
.200—-143/103
.300—-207/137
.400—-237/163
.500—-251/177
.600—-260/185
Regarding the heads in post #22...... in terms of BB Mopar heads.......if the choice is bigger valves ........ or........ a little well executed bowl/pinch work....... take the porting.
Doing both is best, but if you can only have one...... the porting wins.
Here is a test on a 346 head(same intake port as a 452).
-recondition seat(stones)
-reface OE valve, add back cut
-blend bowl & SSR, bullet nose guide boss
-open pinch to 1.060”
Lift———I/E
.100—- 70/56
.200—-143/103
.300—-207/137
.400—-237/163
.500—-251/177
.600—-260/185