what pistons will lower gsr compression?

[stmotorsports]

Any of you guys who know me know I've been a d-series head for awhile now so sorry for the b-series noob q...
I'm considering doing a f/i gsr in my next civic but want to drop the compression to around 9.5:1. Has anyone done this? What pistons will work if any?

 

[K2e2vin]

LS pistons will yield ~9.32:1 CR with the OEM 3-layer gasket.

 

[97CTR]

Run the gsr pistons with a thicker headgasket.

 

[johnercivic]

Run the gsr pistons with a thicker headgasket.

True, GSR doesn't have that high of a compression to begin with, less work too.

 

[stmotorsports]

oh yeah I forgot the usdm version is only 10:1, I was thinking of the jdm version that is 10.6:1

I guess I would just have to make sure to get the usdm engine with the jdm trans...

so what headgasket is thicker and wouldn't blow out all the time under around 10-11psi boost? And what would it drop the compression to?

And if I did decide to go with different pistons, the LS ones will fit? I figured they would be different comp height or something due to the differences in stroke, but guess not...?

 

[97CTR]

Cometic headgaskets are very good quality and come in all different thickenesses. Stock is .029" go to Honda, Acura Tech Website, tutorials, tuning and HOW-TO's. Drag racing, street racing, road racing - C-speedracing.com and use their compression calculator with different hg thicknesses to get the comp ratio you are looking for.

 

[97CTR]

I came up with a .050 gasket for 9.5:1 eBay Motors: COMETIC HEAD GASKET HONDA ACURA ALL MODELS (item 8051752673 end time Jun-26-06 15:50:58 PDT)