When you flycut pistons on a stock bottom end how does that effect compression ratio? I would think it would lower the compression, but how much? How will it effect HP?

ex..flycut .020-.040

 

HP loss will be trivial with the amount of cut you can get away with on a stock piston ~.080 cut intake ~.060 exhaust. Dont expect your HP to be effected more than 3whp. Just think the whole rule of thumb, 4%(roughly) HP per point of compression. You arent going to lose more than .15 of a point.

Brandon