Sprint car motors?

they are not your stock motor. they are very precise well built blueprinted with custom pistons and rods and crank. ring combo is usually a thin metric combo. cylinder heads are aluminum worked over to provide flow and esp port velocity. the cam usually is a roller, depends on rules. also, they run fuel injection, hilborn style. some run race gas or alcohol.
they turn them lots of RPM. there's more to them. also dry sump oiling. they are not cheap!!! it's an art.