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Originally Posted by cadillac_al  I really doubt that the 4.9 is stout enough to support much more power; especially at higher rpms. GM always uses small cams so I think a moderate cam would be the biggest bang for the buck. The small turbo theory sounds like a good plan too but if it's going in another vehicle you might as well put money in a Chevy V8. How heavy was Pete's 12 sec car? |
If the engine is in good condition, they're usually pretty tough. I wouldn't run more then 8psi of boost on one though, even with alc. injection and a front mount. Still, the weakest link in the drive train is the transmission. It would need some serious beefing up to handle anymore then, I'd say, 250bhp. For anything over 300bhp I'd want a limited slip differential, but those are pretty expensive.