George V

I just purchased GMPP LS-6 heads and a LPE GT2-3 cam. I am planning the install over the winter and wanted to know if I should deck the heads to reduce the 65 CC chambers down to 62 or 63 CC or leave them alone. 93 octane is readily available in CT. Other mods include QTP headers, high flow cats, Z06 lid, and Ti cat back

66deuce

iTrader: (1)

if it was me,i would leave the heads alone and use thinner cometic gaskets.this will raise the compression a little and give you a better quench,which will help to reduce detonation.even with 93 octane that cam doesn't have a lot of overlap to help bleed off cylinder pressure a lower rpms.just my .02

George V

Leaving the heads will bring the compression just above a stock Z06 with GM gaskets

George V

No one has recent experience on these?

SS1875

iTrader: (34)

I have the LPE LS6 heads 59cc chambers with the GT1-1 cam on/in my LPE 383 stroker. I have 11.2-1 compression can run 93 octane and still make 500HP @ the wheels(New numbers). I'm not sure what your asking from us but I hope this helps answer your question.

equandt

iTrader: (2)

Leave the heads alone, they are great heads right out of the box. You bought a great combination. Install it with the Cometic gaskets and have fun.

George V

Thanks, that’s the advice most give, I will do the install as they are. I wanted to make sure I was getting the most I could out of the package.

Pimpium57

iTrader: (104)

I'm going to try the GT2-3 with stage 2.5 5.3L heads.......

I don't see why you wouldn't want to mill them to increase compression tho???