5.0 Engine Combinations for 400+

Originally posted by jrgoffin
I'd like to think that I am pretty damn close with my combo (in the sig). The ported heads, Crane 2031 cam, and 10.5:1 compression helped out, especially with 100 octane gas! Had I gone ahead and bought a set of AFR heads like I originally wanted, it would have been over 400 easy. I'm estimating 380-390 right now, especially telling the difference with where it was before I built the new engine. I'm leaving it as is though since the car is already ridiculously fast!

jrgoffin-
Yeah, I agree with Dark_5.0. There's no way you are making anywhere near 400hp with the stock E7 heads even with port work. Your valves are too small. They are choking your combination. I'm running better flowing heads than you are with much bigger valves and I know I'm NO WHERE NEAR 400hp! Just guessing from my numbers and races I've been in...I might be around 320hp at the flywheel. Someday I hope to get her on a dyno and find out for sure. But I'm thinking about ditching my Edelbrock heads & B-303 cam for some AFRs and a custom grind.