i wanted to use the p30 pistons on my b17a. what's the compression ratio going to be. and if anybody can give me technical info on b series pistons(specifically the civic r and p30). i'm talking about piston cc and dome height, compression height and weight. thanks

 

i dont have the exact specs ....but estimating....this is what you'll get.

CTR pistons in B17A engine will put you around 11.4 compression ratio
(I had this setup before my car got stolen and it was fawkin sweeeeeeeet)

JDM P30 pistons in a B17A engine will bump you up to about 10.6-7 compression ratio. I haven't tried this set before...or yet...but it would be a good setup to try along with a GSR/P72 head...then that should get you up to about 11.1 cr because of the GSR heads smaller combustion chambers.