djm_e22

iTrader: (2)

Just wondering for all of you that boosted your stock or ported LT1 heads. What amount of boost were you able to give them and if you know what rwhp you got? Could you give what transmission and rear end you had? Thanks.

skinnies

iTrader: (33)

No dyno numbers, but on stock heads AND stock cam I went 10.80 at 127.8 in my firebird at 3500lbs on 11lbs with a t76.

RealQuick

iTrader: (14)

Gabbiani

iTrader: (20)

Numbers will be all over the place but....

We do have 5 bolts per hole - so that helps some
Gasket and bolts/studs can make the limit vary a lot
Our decks are pretty thin - warping is a little easier

With all of that in consideration, power wise you can still make pretty rediculous power. Remember boost is a measure of resistance, not power. I made just over 600rwhp on around 18psi with pretty much stock heads- Take a nice 427 good flowing lsx and put 18psi through it.... good lord. The volume of air is way different. If you have a turbo/blower that can push more air though - even if it is inefficient and the top end is restrictive - it will make more power.

I'm using the same heads this time and a much bigger turbo. Plan to make more power too.

ss.slp.ls1

iTrader: (36)

If you have a budget that will allow for it, ditch the stock castings and get some nice Trickflow heads. Head studs and a good gasket are needed.

blk6speed

641tq/639hp on 14#`s..(rear mount gt 42-76) 355ci at 8.5:1,self ported intake and heads,6 speed,stock rear 410`s..