IHRA stock classification (Crate Motor)
 

Hey guys, l am looking into possibly building a car for the IHRA stock eliminator crate motor class. I have two possible cars to use. One is a 1982 Z-28 camaro and the other is a 1987 Camaro Berlinetta. The crate motor that I am planning to use is a 350/330 Vortec (340hp). I am having trouble figuring out what classification each car would naturally fit in. Not sure which shipping weight I should be using to determine the classification. Would you recommend using one camaro over the other? I am pretty new to this class of racing so any help or advice would be greatly appreciated. Thanks, Jason

Re: IHRA stock classification (Crate Motor)
 

Heavy or Pro

Re: IHRA stock classification (Crate Motor)
 

I did not know that it was broken down heavy and pro. I thought it would just be under Crate Motor Stock rules (IHRA).

Re: IHRA stock classification (Crate Motor)
 

I "think" he was being sarcastic,because he doesn't like Crate Motor cars.Some believe that they don't belong in Stock because Crate Motors were never produced in actual production cars.

However,there are tons of Crate Motor cars currently being run in Stock in both NHRA and IHRA.

I really don't know all the particulars about classification.I'm sure some IHRA regulars will be able to help you.Good Luck.

In case you don't have one,here is the rulebook link:

http://www.mydigitalpublication.com/...on/?m=1203&l=1

Re: IHRA stock classification (Crate Motor)
 

I appreciate your help! Thanks

Re: IHRA stock classification (Crate Motor)
 

With all of these Mopar replacement heads being "approved" for Stock,I believe the choices are Super Pro or Pro.

Re: IHRA stock classification (Crate Motor)
 

Probably "PRO" then.

Re: IHRA stock classification (Crate Motor)
 

Shipping weight of the car/body style used (using the heaviest available gasoline engine), divided by the IHRA rating for the crate motor = weight break to determine your natural class.

1987 Camaro (I don't see a Berlinetta listed for '87) was 3,232 pounds, divided by 340 = 9.50. You would run the 9.50 pound class, which is H/CM. You could also run the 9.00 (G/CM) and 10.00 (I/CM) pound class(es).

For minimum weight for each class, take 9.00, 9.50 or 10.00 weight break x IHRA rating of the motor + 170 pounds = minimum weight, with driver, across the scales at the conclusion of the run.

G/CM 9 x 340 + 170 = 3,230 pounds
H/CM 9.50 x 340 + 170 = 3,400
I/CM 10.00 x 3.40 + 170 = 3,570

Re: IHRA stock classification (Crate Motor)
 

Mike,
Thanks for the info. That was helpful. I wasn't sure if I needed to use the 3,232 shipping weight as you have suggested or the 2,930 shipping weight that was listed for the 2 door coupe sport. Jason

Re: IHRA stock classification (Crate Motor)
 

I believe most, if not all, use the words "use the heaviest gasoline V8 for Classification purposes". So in, say, a 1995 Camaro, you would use the shipping weight for the LT-1 motored version.

Here are some people you can contact

http://www.ihra.com/ContactUs/,

or you can also send a PM (private message) to Danny Waters Sr on here (ClassRacer).