Horsepower factors
 

Does the IHRA use the NHRA horsepower factors that are listed on the NHRA (Classification Guide) website to classify Stockers (when applicable)??? I know there's nothing on the NHRA site about crate motors, but for conventional Stockers, does IHRA use the factor numbers, down the line, so-to-speak?

Thanks for any information...

Bill

Re: Horsepower factors
 

Yes but IHRA does not refactor based on NHRA adjustments. This is where the factors are different; ex 1985 Camaro/Firebird 305 150/258 combo in NHRA is still at 250 in IHRA.

Re: Horsepower factors
 

Thank you, Doug, for that complete answer. That was precisely the information I was looking for.

Is there an online site with the IHRA Classification Guide horsepower factors that we can access (like the NHRA site?)

Bill

Re: Horsepower factors
 

IHRA doesn't have a class guide persay. There is a section on IHRA's site that lists all the hp adjustments. If the combo you're looking for isn't on that list then it is still at the original NHRA factor.

Re: Horsepower factors
 

When I worked for IHRA in the 70's they had thier own class guide. As the years passed by and IHRA was sold several times they just used the NHRA guide. Then as some of the HP factors we noticably out of wack IHRA made some changes slightly different than NHRA's. As far as the production S/S cars are concerened IHRA had a guide that contained the lighest car shipping weights for that part of a seperate S/S catagory called "Formula S/S" as car counts decreased over the years they were combined into regular S/S eliminator based on cubic inches to shipping wts. Now you have "Production S/S" (same class structure) and they just use the lighest shipping wt listed in the NHRA guide per cubic inch to obtain the class. Along the way the multi carbed cars in the old formula S/S were discontinued. Now before someone wonders what a "Bastard" class Production S/S is....its a take off on the old AHRA formula S/S cars (cubic inches to factory shipping wt) only they look much better today and not much different than single carbed modifed cars running in NHRA.....lol.

Re: Horsepower factors
 

Thanks for the explanation. I was discussing an NHRA car that was heavily factored by the AHFS, that has shown up running IHRA and was curious if the factor was used in both associations.

It made no sense to me that IHRA would use one (original) set of HP numbers, but would not follow through and assign AHFS-generated factors as they were accumulated.

But, apparently, that's what they do. I guess they have their reasons, but it would seem to complicate things to a very large (and, unnecessary) degree.

I appreciate the explanation, guys....


Bill

Re: Horsepower factors
 

What the heck would make you thing IHRA would use NHRA's AUTOMATIC horsepower system ???
THAT IS ABSURD.........:-)

Re: Horsepower factors
 

IHRA uses their (NHRA's) factors, some of which are absurd... why not the factors generated by the AHFS?
Sure would simplify things...

Re: Horsepower factors
 

It would also put some combos out of business (make them JUNK) like they are in NHRA. Example.......1970 426 Street Hemi Cuda among others! Not saying that car was bogus but it was never certified with a tear down inspection either. IHRA tends to try to find a happy medium to keep the average person racing unless it an obvious bogus factor. They havent seen any of the new Mustangs competing YET....lol.

Re: Horsepower factors
 

Oh you mean the car that went red, didnt scale, didnt tear down and got the motor hit many times. Yea that car. Put the same motor in a Road Runner and I think its like 28 HP less. Funny thing is that motor is in a b body now and hasnt went that fast.

Re: Horsepower factors
 

Terry,
Fred Henson's Street Hemi Challenger held the record in NHRA A/SA, and I believe to do that, they have to tear down, don't they?

In view of that, I wonder what you mean by "was ~never~ certified with a tear-down inspection, either."

Maybe you mean, it wasn't certified with a tear-down inspection when he bombed the factor. That's a good point.

Re: Horsepower factors
 

Bill....Thats correct. It was not certified after he bombed the index, Just like Herb Jr. said. I also dont think ANY combo should be factored unless its certified during a complete tear down inspection. Thats why I feel the AHFS is a major joke.

Re: Horsepower factors
 

I totally agree, Terry.

ANYBODY could build a killer motor and bomb whatever index they can get the car classified into....
if they're not going to certify the legality of the powerplant after the fact.

You hit the nail on the head; it's a joke.


Bill

Re: Horsepower factors
 

Now you call the AHFS a JOKE ??
A few posts back you thought it was ABSURD that IHRA didn't follow it !!!!!!!
Which is it ????
:-)

Re: Horsepower factors
 

John Kelley said:"Now you call the AHFS a JOKE ??
A few posts back you thought it was ABSURD that IHRA didn't follow it !!!!!!!
Which is it ????"

No, John, I didn't.
I never said anything about it being "absurd" that IHRA didn't follow it.

What I said was, "IHRA uses their (NHRA's) factors, >>>>some of which are absurd...<<<<< why not the factors generated by the AHFS?
Sure would simplify things..."

That's nothing like what you're contending that I said. Read a little closer to the page.... or, put on your glasses.


Bill


__________________

Re: Horsepower factors
 

In nhra division 4, if you go more than 1.40 under, you have to tear down, Robin Brown had to at Houston points meet in 2007, Tom

Re: Horsepower factors
 

Well it sure didnt happen with the STREET HEMI deal (they didnt even weigh it) and it dosent matter what division your from. It should ALWAYS be done.

Re: Horsepower factors
 

Herb, It's a pretty trick deal when you can change body styles and lose 27 HP. That whole Hensen deal is a big crock. I was working with NHRA and one of their better people to fix the problem and suddenly that person is gone from the AHFS. It is a shame to let one guy ruin a combination. The E-Body cars can't pack 3800 lbs in A/SA and be any where near competitive. Chris Howes tried it and couldn't qualifiy at Indy. I know for a fact his motor made the same power as Hensens motor on the same dyno. I have talked with NHRA people, written letters and sent e-mails until I am blue in the face. The answer I get if I get one is wait until June. So I guess we wait until June to maybe fix something that should have been fixed over a year ago.