Thread: compression problem

We have sr16ve pistons in an sr20ve motor and we have a compression of 320psi per cylinder. We would like to lower the compression to around 280psi per piston.
which Head Gasket thickness should we use to reach this compression?

No such animal, if you want to lower it shave the piston domes. Or run E85 in the car.

If u have 93 octane available and a good tune you will be fine. I run sr16ve pistons untouched besides notching for squirters daily.

Not going to completely solve your issue but this could at least help a bit:

VVL Metal Head Gasket, This is the factory ?Metal Head Gasket? for the SR VVL Engines. This head gasket should hold more power for turbo applications and is less likely to blow out