If you don't turn up the fuel, it will run lean and your combustion temp will increase and you will melt a piston. If you get the mixture right then the combustion temp will be higher than N/A, and you will melt a piston.If you overfuel this will also increase combustion temperatures and you will melt a piston. If you change the pistons to ones from a turbo then you can run boost up to maybe 6 or 7 psi and fuel to match, fit an intercooler too and who knows. Its a lot of work but if you have the bits what is there to loose? Good Luck!