Yes, I'm using an intercooler as well as methanol. The pistons held up well until 30psi. I still have not disassembled the engine to determine what failed (it still ran but poorly). I was a touch lean but then again 30 PSI may have been to much for the stockers. I"ve ran over 20 PSI for the past 3 summers and 30 psi the last time at the track.