pdasterly

iTrader: (4)

forged ls2 9.1 cr.
setup was going in my camaro but ended up selling along with turbo kit. motor is now going in a 2004 gto but I havent found a forced induction system for a decent price, how can I raise the compression in the motor without swapping pistons. and by how much?

Fbodyjunkie06

iTrader: (10)

Mill the heads.

roninsonic

iTrader: (3)

You can get some thinner head gaskets or mill the heads.

RezinTexas

in addition to the above, you can deck the block.

itsslow98

iTrader: (18)

First question to ask is will the motor stay N/A or do you plan to run boost/nitrous later on? If you plan to throw boost at it I would not mill the heads.

redtan

iTrader: (5)

You can do all that, but I doubt you're going to get it up that high.

Maybe some milled 5.3 heads with 0.040 gaskets will get you just about to 10.0:1.

wildcamaro

iTrader: (15)

5.3 heads would be the cheapest route...personally I don't think the thinner head gasket from cometic are really worth the money since milling heads will get you there quicker...

If I was you I would get some Texas speed 5.3 heads and if you still want more then mill em...

Blk98Vert

iTrader: (2)

There are plenty of kits available for the GTO both new and aftermarket, what is your budget?

pdasterly

iTrader: (4)

picked up some afr 225's, forcing me to buy charger