Originally posted by mpg9999
I guess my main question is about the thermal expansion of 2618. How much more does it expand over a stock cast piston, and what increase in sidewall clearance will that require me to run.
Doesn't each piston manufacture give you that range with the pistons they make. That was my impression. Plus, I now remember Tom talking about using some piston coating to quiet down the forged pistons during warm up. You may want to look into that as well.