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bill dedman · 12-26-2008, 01:30 AM

I was GOING to suggest that the rationale behind open or closed-off scoops would logically lay with the engine's original horsepower factor; if the engine was out of a car that had fresh air, then the factord HP rating would reflect that, and in a different chassis, then it would be legal with an open scoop (fresh air.) That made all kinds of sense to me. Anything else, and you're not being true to the original operational parameters that gave the engine that particular factor in the first place.

THEN, before I made a complete fool of myself by posting something that had a hint of logic to it, I decided to go and see how much factored HP difference there was in the so-called "Ram-Air" (fresh air) packages that used open scoops, and the ones that didn't (otherwise identical engines, like the early Cobra Jat Mustangs, some of which had "Ram Air".)

Guess what??? NO DIFFERENCE! At some point, NHRA has decided that a fresh air package is worth NOTHING in terms of factored horsepower... but, they stilll list the different (fresh air or no) combinations.... they just give them identical horsepower.

Admittedly, I only looked at a few examples, but it was obvious to me from what I saw, that NHRA had gone through the list and either cut the fresh air motors back to the closed-in, no scoop models' factored HP ratings, OR upped the rating on the no-scoop models to match the fresh air engines' factors.

I must not have been in class that day.... That phenomenon has come about totally without my having noticed it.

Beings that there's no difference in the ratings, why would they CARE which engines have operational fresh-air systems??? I can't imagine that they would.

So, this is one in which there IS no argument that I can see, that scoops that were on a car would have to be closed off, because as NHRA has shown us in their sacred Classification Guide, they aren't worth even ONE HORSEPOWER.... Check it out...

Admittedly, I didn't check them all, but I did look at several combinations that had both underhood air vs. fresh air, and all the ones I looked at had identical factors.

It is a mess...

Bill

12-26-2008, 01:30 AM	#5
bill dedman VIP Member Join Date: Feb 2002 Location: Conway, AR Posts: 1,739 Likes: 0 Liked 6 Times in 4 Posts	Re: Older Superstock GT cars with scoops I was GOING to suggest that the rationale behind open or closed-off scoops would logically lay with the engine's original horsepower factor; if the engine was out of a car that had fresh air, then the factord HP rating would reflect that, and in a different chassis, then it would be legal with an open scoop (fresh air.) That made all kinds of sense to me. Anything else, and you're not being true to the original operational parameters that gave the engine that particular factor in the first place. THEN, before I made a complete fool of myself by posting something that had a hint of logic to it, I decided to go and see how much factored HP difference there was in the so-called "Ram-Air" (fresh air) packages that used open scoops, and the ones that didn't (otherwise identical engines, like the early Cobra Jat Mustangs, some of which had "Ram Air".) Guess what??? NO DIFFERENCE! At some point, NHRA has decided that a fresh air package is worth NOTHING in terms of factored horsepower... but, they stilll list the different (fresh air or no) combinations.... they just give them identical horsepower. Admittedly, I only looked at a few examples, but it was obvious to me from what I saw, that NHRA had gone through the list and either cut the fresh air motors back to the closed-in, no scoop models' factored HP ratings, OR upped the rating on the no-scoop models to match the fresh air engines' factors. I must not have been in class that day.... That phenomenon has come about totally without my having noticed it. Beings that there's no difference in the ratings, why would they CARE which engines have operational fresh-air systems??? I can't imagine that they would. So, this is one in which there IS no argument that I can see, that scoops that were on a car would have to be closed off, because as NHRA has shown us in their sacred Classification Guide, they aren't worth even ONE HORSEPOWER.... Check it out... Admittedly, I didn't check them all, but I did look at several combinations that had both underhood air vs. fresh air, and all the ones I looked at had identical factors. It is a mess... Bill __________________ Bill Last edited by bill dedman; 12-26-2008 at 01:33 AM.