5. The twin 12mm P7100 injection pumps were modified to allow 6,000-rpm engine speeds and 600 cc of fuel, but really nothing too exotic is needed, since there are two pumps instead of one. 6.

Our pistons have a D-shaped dish to lower the compression for use with pump gas. So it’s not an apples to apples comparison, especially since the 454R is designated as a race only engine.