IHRA stock classification (Crate Motor)

STR001 · 02-03-2012, 11:01 PM

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

Larry Hill · 02-03-2012, 11:04 PM

Heavy or Pro

STR001 · 02-03-2012, 11:13 PM

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

442OLDS · 02-03-2012, 11:23 PM

Quote:

Originally Posted by STR001

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

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

STR001 · 02-03-2012, 11:37 PM

I appreciate your help! Thanks

442OLDS · 02-04-2012, 12:03 AM

Quote:

Originally Posted by Larry Hill

Heavy or Pro

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

STR001 · 02-04-2012, 12:09 AM

Probably "PRO" then.

Mike Carr · 02-04-2012, 12:21 AM

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

STR001 · 02-04-2012, 01:13 AM

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

Mike Carr · 02-04-2012, 01:21 AM

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).

02-03-2012, 11:01 PM	#1
STR001 Junior Member Join Date: Jan 2012 Location: Claxton, Georgia Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	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

02-03-2012, 11:04 PM	#2
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,635 Likes: 1,929 Liked 10,687 Times in 2,225 Posts	Re: IHRA stock classification (Crate Motor) Heavy or Pro __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

02-03-2012, 11:13 PM	#3
STR001 Junior Member Join Date: Jan 2012 Location: Claxton, Georgia Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	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).

02-03-2012, 11:37 PM	#5
STR001 Junior Member Join Date: Jan 2012 Location: Claxton, Georgia Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	Re: IHRA stock classification (Crate Motor) I appreciate your help! Thanks

02-04-2012, 12:09 AM	#7
STR001 Junior Member Join Date: Jan 2012 Location: Claxton, Georgia Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	Re: IHRA stock classification (Crate Motor) Probably "PRO" then.

02-04-2012, 12:21 AM	#8
Mike Carr VIP Member Join Date: Nov 2001 Location: Enon Valley PA Posts: 1,650 Likes: 234 Liked 83 Times in 37 Posts	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 __________________ Mike Carr, Tri-State S/SS Association President Looking for 2015 S/SS Race Sponsors Contact me if interested buffdaddy_1302@hotmail.com (724) 510-5912

02-04-2012, 01:13 AM	#9
STR001 Junior Member Join Date: Jan 2012 Location: Claxton, Georgia Posts: 55 Likes: 0 Liked 0 Times in 0 Posts	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

02-04-2012, 01:21 AM	#10
Mike Carr VIP Member Join Date: Nov 2001 Location: Enon Valley PA Posts: 1,650 Likes: 234 Liked 83 Times in 37 Posts	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). __________________ Mike Carr, Tri-State S/SS Association President Looking for 2015 S/SS Race Sponsors Contact me if interested buffdaddy_1302@hotmail.com (724) 510-5912