MTC_75vette

I have a 2002 ls1 with a 750 mighty demon carb, victor jr manifold, T-rex cam kit, full roller rocker arms, long tube headers, with a th-400 trans. The car is making very good power now and I know I am losing a decent amount of power thru my th-400 trans but I would guess I am around 400-425 rwhp.

My friend offered me his ls6 heads for free and I was wondering how much power I would gain if I put those on stock? If the power gain is minimal I am considering having them cnc ported since I would be getting them for free. If I do that what kind of power would I gain? Let me know what you guys think I should do? Thanks!

Mike

garygnu

if you bolt them on as is with good springs you mite gain 20 hp.cnc porting mite add 15 hp.check for any valve seat leaks.

camz28arro

iTrader: (12)

About the same guess here....20hp stock or 40hp with a good cnc job.

MTC_75vette

Thanks guys....what does a good port job go for $300-500?

fatmat80

if your getting them for free i would have them cncd..never can have oo much power...