Your favorite engine...

[Thirdgen89GTA]

Please explain this one........"LS7 - 505hp, 30mpg. Cam, headers, exhaust = 650rwhp with out losing much economy at all. And its N/A."

Since when do you gain nearly 150hp from exhaust, cam, and headers? From my years of experience, I say NFW. Alll due respect, but come on.

Sorry, most of the time I can only find rwhp numbers since people can't usually afford to take their engine out and have it put on a true engine dyno. I meant crank HP there. So 650hp at the crank.

There are a few packages out there which consist of just a cam, headers (long tubes most likely, though they don't specify), and a cat-back that most likely eliminates the bypass valve for better flow. 650hp at the crank isn't hard when the cylinder heads flow as much as they do.

The heads flow about 370cfm on the INTAKE and close to 250cfm on the exhaust. The cam spec is 211/230 duration @ .050" lift with .591"/.591" lift. Don't know the LSA off the top of my head. The heads themselves have a 12* intake port. This engine is amazing with the amount of design work in it. No cam phasing, no boost, no DOHC setup. Just an insane pushrod motor with perfect geometry.

LG motor sports got 540rwhp with cam/headers/air filter and no tuning at all, stock ECM. I imagine that there is a bit of power left with the tune. I haven't looked up any new stuff from LG motorsports., thisi is an old post.
http://forums.corvetteforum.com/showthre...rum_id=100