As we turn on the (new) engines to start the season, the twitterverse is getting even more full of people debating the NASCAR EFI system. Is it like the EFI in production cars? Is it throttle body? Is it multiport? Here are the answers:
And yes, I think NASCAR did a pretty good job implementing this rather major change in a very short time. As I note in the video, going to an actual production-car-like EFI system would likely have required a wholesale engine design. NASCAR engine heads and blocks have special pathways running through them for cooling purposes – so it’s not as simple as just putting in eight more holes.