CLASS RACER FORUM - View Single Post - to all 85-92 efi racers

Fred Popov · 10-03-2008, 09:01 AM

Jeff
The intakes on the 305 and 350 TPIs are the same and the 350 TPI should be rated at more HP than the 305. But I think that calculating hp only based on the engine size is not correct. Although it would make things easier, NHRA factors these engines based on power output and not displacement. Also, the horsepower is based on factory engine output then it increases (or sometimes decreases) as NHRA attempts to equalize the playing field for all stocker engines. It's not based on what a built stocker engine should be able to put out. From reading some of these post, some stock racers keep their car's HP figures a closely guarded secret.
Also, can you explain why Manual Transmission consistency is better with a Turbo I can't figure that out. My only guess is that it has a narrower power band and more gears will keep it in its power band.

Fred

10-03-2008, 09:01 AM	#39
Fred Popov Junior Member Join Date: Sep 2007 Location: Chesapeake, VA Posts: 64 Likes: 0 Liked 0 Times in 0 Posts	Re: to all 85-92 efi racers Jeff The intakes on the 305 and 350 TPIs are the same and the 350 TPI should be rated at more HP than the 305. But I think that calculating hp only based on the engine size is not correct. Although it would make things easier, NHRA factors these engines based on power output and not displacement. Also, the horsepower is based on factory engine output then it increases (or sometimes decreases) as NHRA attempts to equalize the playing field for all stocker engines. It's not based on what a built stocker engine should be able to put out. From reading some of these post, some stock racers keep their car's HP figures a closely guarded secret. Also, can you explain why Manual Transmission consistency is better with a Turbo I can't figure that out. My only guess is that it has a narrower power band and more gears will keep it in its power band. Fred