Stock piston Rev limit

Modest budget twin turbo ?? If your building a motor the foundation is important . What you're planning on building is not cheap , best do it right first time around . With turbos and superchargers I would not skimp on the pistons .
Good luck 550 hp and twin turbos is not modest budget territory , at least not for me . Hate to tell you what 412 hp out of a 340 cost me , but it's still running after 10,000 hard miles and many runs at the track