I have a d16z6, they are selling 9.5.1 compression pistons from a d16a6 stock bore, if I use this on my z6 what compression would it be, I already tried the compression calcutlator but didnt work, thanks for your help!!!

 

It's really high 12.1 I think. PM Spade about this kind of thing, he's a big time SOHC guy (as is MistaBone)

 

it wont be that high. add about 0.8:1 compression going from a6 to z6

 

Thnaks for your help!!!!