[Rev]

Originally posted by Jeff Chambers
400+ out of a 302 is definitely possible. Punch it out to 310ci (+0.060") and put a set of good aluminum heads on it with a decent intake (Performer RPM, SystemMax, etc.) and a good custom cam (AFM or FTI) and you'll be there. Either go with 30# injectors or a 650cfm carb. Compression anywhere above 9.8:1 with these parts will get you 400hp.

It may not be up your alley, but my Street Warrior combination makes around 575hp at the crank. Its a 308ci with TFS Twisted Wedge heads flowing about 300cfm/240cfm. I've got a custom AFM .500" lift hydraulic roller cam at 250/250 @ .050", with an unported Edelbrock Victor Jr intake and a Holley 650cfm 4150HP carburetor. Headers are 1-3/4" Kooks with 3" exhaust through some Dynomax race magnum bullets. My compression is around 13:1 with flat-topped pistons.

Now I'm spinning it past 8500rpm frequently, but we've built many more tame street versions that make more than 425hp on the engine dyno and are real daily drivers, have good street manners and get decent mileage.

It can be done, don't let anyone tell you otherwise. No spray needed!

I assume we're talking race fuel here and a trailer for the most part. How expensive was that 425 HP street engine to build? And where in the RPM range did it make the power? I'm not doubting the buildup or dyno performance, but really just curious.

Rev