Stock pistons start breaking around the ringland over 12psi. The most they can make under 12psi on any turbo I have seen is right around 300-320whp. I had one that I suprcharged and then later went turbo with on that same exact kit.
Alright. It sounds like they will hold up like any other N/A that gets turboed, except the 4g63
. I was wrong about the 3rd gen block.