Ihra stock car classification guide

Bill Bogues · 08-26-2010, 02:03 AM

Can someone tell me where I can view a stock car classification guide for IHRA. I'm planning on running a new car (85 Camaro) at the Crandall pro-am. As I don't have a 305 engine at this time I was planning on putting a 71 350/270 in it to run in the stock gt class.My problem is I don't know what power to weight factor to use. The Nhra book doesn't list a 85 Camaro with a 350/270. I don't know whether to use the factor for my Nova (11.36) or what to use. HELP!

X-TECH MAN · 08-26-2010, 06:30 AM

Quote:

Originally Posted by Bill Bogues

Can someone tell me where I can view a stock car classification guide for IHRA. I'm planning on running a new car (85 Camaro) at the Crandall pro-am. As I don't have a 305 engine at this time I was planning on putting a 71 350/270 in it to run in the stock gt class.My problem is I don't know what power to weight factor to use. The Nhra book doesn't list a 85 Camaro with a 350/270. I don't know whether to use the factor for my Nova (11.36) or what to use. HELP!

Use the 305 engine factor to get the shipping wt of your Camaro then use your 350 combo HP factor to get the GT class.

Mack Reeves · 08-26-2010, 07:31 AM

I was told they use the NHRA guidlines......

X-TECH MAN · 08-26-2010, 08:30 AM

They do in MOST cases. Some HP factors are different (minor rating difference in most cases) so the shipping wt/class factor has to be re-calculated when running a combo as a natural NHRA style class car. When building a GT or Crate Motored combo you just use the shipping wts (same/same) to figure the class. The shipping wt never changes more than a couple of pounds no matter the HP factor. Just be sure to use the small block shipping wt for a small block combo and the big block shipping wt for a big block combo.

Bill Bogues · 08-26-2010, 01:05 PM

Thanks for the reply: I was a little lost on this one.

Mike Savelle · 08-26-2010, 05:59 PM

With the 350/270 you will be in GT/D . @ 11.00 to 11.99 lbs per Hp. When i ran that class the minimum weight was 11 x 270 plus 170 = 3170 , not sure if you can get your car that light. Mike

08-26-2010, 02:03 AM	#1
Bill Bogues Member Join Date: Apr 2005 Location: Bethany La. Posts: 320 Likes: 84 Liked 171 Times in 53 Posts	Ihra stock car classification guide Can someone tell me where I can view a stock car classification guide for IHRA. I'm planning on running a new car (85 Camaro) at the Crandall pro-am. As I don't have a 305 engine at this time I was planning on putting a 71 350/270 in it to run in the stock gt class.My problem is I don't know what power to weight factor to use. The Nhra book doesn't list a 85 Camaro with a 350/270. I don't know whether to use the factor for my Nova (11.36) or what to use. HELP! __________________ Bill Bogues 4696 STK

08-26-2010, 07:31 AM	#3
Mack Reeves Senior Member Join Date: Sep 2009 Location: Elkin, NC Posts: 672 Likes: 168 Liked 44 Times in 13 Posts	Re: Ihra stock car classification guide I was told they use the NHRA guidlines...... __________________ Mack Reeves 2377 STOCK & SUPER STOCK

08-26-2010, 08:30 AM	#4
X-TECH MAN Banned Join Date: Dec 2007 Location: Lake Placid, Florida Posts: 3,207 Likes: 1,049 Liked 235 Times in 110 Posts	Re: Ihra stock car classification guide They do in MOST cases. Some HP factors are different (minor rating difference in most cases) so the shipping wt/class factor has to be re-calculated when running a combo as a natural NHRA style class car. When building a GT or Crate Motored combo you just use the shipping wts (same/same) to figure the class. The shipping wt never changes more than a couple of pounds no matter the HP factor. Just be sure to use the small block shipping wt for a small block combo and the big block shipping wt for a big block combo.

08-26-2010, 01:05 PM	#5
Bill Bogues Member Join Date: Apr 2005 Location: Bethany La. Posts: 320 Likes: 84 Liked 171 Times in 53 Posts	Re: Ihra stock car classification guide Thanks for the reply: I was a little lost on this one. __________________ Bill Bogues 4696 STK

08-26-2010, 05:59 PM	#6
Mike Savelle Member Join Date: Dec 2001 Location: Ontario Canada Posts: 365 Likes: 120 Liked 7 Times in 5 Posts	Re: Ihra stock car classification guide With the 350/270 you will be in GT/D . @ 11.00 to 11.99 lbs per Hp. When i ran that class the minimum weight was 11 x 270 plus 170 = 3170 , not sure if you can get your car that light. Mike