My son and I are repairing his boosted 95 Civic. He ordered pistons, but they are slightly highter compression than factory, so he determined that he needed a thicker head gasket to lower the compression a bit. What thickness is factory? What thickness should he get? What else may be affected by this... what about the timing belt? We are planning on doing this ourselves, so I want to get all the info I can before we start screwing things up...

 

what compression pistons are they? he might be alright.

 

I bellieve that they are 9.2:1. Is that higher than factory? Is it worth adding a thicker gasket?

 

that compression ratio is fine. its probably not higher than factory.