Supercharging stock 5.0

[Unit 5302]

Originally posted by 1995MGTS
First time I had my car dynoed, the guy before me had an early 90's LX with nothing but an S-trim and o/r h-pipe, the rest of the car he said was bone stock and it looked it. He showed me his dyno sheet. 320rwhp/330+rwtq (not sure on the torque but it was in the 330's). Not sure what pulley he was using on the S-trim either but it does show what a good tune can do.

So I think its possible you could hit 350rwhp with your mods and a good dyno-tune. Intercooler isn't necessary to do so. Might be safer but not mandatory. Good luck.

I think either he had an intercooler, other mods, or the dyno was screwed. You are talking about adding at LEAST 200hp with ~9psi on the stock cam with 1.7s, stock intake, and ported heads.

If that was the case, nobody would go N/A. You could add 130hp with a 6psi blower for $1800. When's the last time you saw a stock engined 5.0HO with a non-intercooled blower running at 6psi trap 110+? You've just said a 9psi blower is significantly more powerful than a well built EFI 347 stroker engine. A blower just isn't that efficient on a stock engine without an intercooler. Even the manufacturers don't even hint at that kind of power increase from a non-intercooled blower. You're talking power increases that an intercooled turbo would produce.

Vortech claims up to 126hp increase at 10psi on an SQ=S trim supercharger. That's 350hp on a stock 5.0. Converted to rwhp, you're looking at 290. The ATI Procharger and Vortech, both being non-intercooled are going to deliver very similar numbers. and Manufacturers like to give the best realistic numbers possible. Making 350rwhp would say that a tuner can squeeze an additional 75hp over the max claims of the manufacturer. That's about 60% more performance increase than what the manufacturer says is possible. With an intercooler, now you're talking maybe.