could someon please tell me the compression on ab18a with itr pistons and a stock head. Is it to much for turboing? thanks

 

y dont u do a comp. checl and find out your self?

 

if by stock head you meant stock ls head your comp. should be around:

10.3:1 with usdm ITR pistons and about 10.8:1 with jdm ITR pistons. also if you meant stock ITR head its 10.8:1 with the usdm pistons and 11.3:1 with the jdm pistons.

 

it wil be fine do boost on that low boost probably max on stock block would be around 12psi with a good standalone tune

 

are u sure thats not to high? but thanks for the info guys