I recently got a turbo put on my altima, and while it is fast at 8-12 psi, I wanna run more. I talked to the people at JWT and they make pistons , but I need to bore out the cylinder head, I need to know how much I need to bore out.
There are three sizes of standard pistons. There's either a 1,2, or 3 printed on the block near each cylinder that tells which size the piston is. There are also two sizes of "oversize" pistons Nissan makes that are used for worn engine rebuilds. The minimum diameter is listed at 88.870 millimeters. The maximum is 90.