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!

Re: Ihra stock car classification guide
 

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.

Re: Ihra stock car classification guide
 

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

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.

Re: Ihra stock car classification guide
 

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

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