Originally Posted by iceboy
yeah im definetly gonna have a tune...not dumb enough to trust a stock ecu.
big question tho...
jdm p30 or usdm p30? jdm gives slightly more compression ut how much?
The P30 piston only exists in the JDM B16A. The USDM B16A uses a PR3 piston. The PCT piston is found on the B16B and will raise your compression to above 12:1. I would say to run the P30 pistons.
Originally Posted by iceboy
oh and is there really any advantage to boring out .25 and running over sized pistons?
Not really. You will gain a little displacement, but not enough to make a difference. Oversized pistons are meant for cylinders that had to be bored out because of large scratches that honing would not get rid of or an out of round cylinder.