To get an idea of the power potential of a high winding engine in the late eighties BMW Formula One engines made 1200hp with a 91 cubic inch engine for qualifying and 900hp for racing. The present engines are limited to 145ci V6 turbo ones that make nearly 900hp at 15,000rpm. The bore is right at 3 7/8" and the stroke is just over ONE AND A HALF inches. The rules state the 15,000 rpm limit but with no (metal) valve springs they can turn 20,000rpm. Lots of power available in a screamer.
