Cam specs for Ported Heads

[tpepmeie]

Originally Posted by Pete

PS
I would also like to know the best cam specs.
I know we could get 500rwhp from a 350ci the question is how much driveability will we have to give up.
If ported LT5 heads have 255cc intake port and 340cfm what would be the right cam for max power anybody have a cam/head caculator.
I would like to try a bigger intake cams maybe in the future when money starts to grow on trees,it gets a bit pricey, unless i find a low priced SGC Stage III intakes or maybe borow a set.
Man i would love to get another 15-20hp and hit 130+mph :-).

Pete, I'll hazard a guess. For a 350 with peak power around 7000 rpm, maybe like 284 seat duration (which could be anywhere from 239-244 @0.050"), and .430 lift. Exhaust 10 to 15 degrees smaller duration and .400-.420 lift.

Corey did a 372 for Bonneville with Stage 3 cams, and maximum porting stock valves. Made great power for its size.

Todd