GT class configuration...

[Rusty Gillis]

Dwight this is a great tool and maybe I'm missing something but what if you have a replacement head and NHRA has added hp how do you look that up?

[Mark Yacavone]

Originally Posted by Mark Yacavone

Does anyone see a button for GT Classes? I don't. I have emailed Dwight.

Okay I see it now. You have to click on the specific p/w factor for the body style and engine to be used, the negotiate from there.

I see , for instance a 66 Chevy II, 2 dr sedan with a 283 , can run three classes in SS, but five classes in GT. Then if the hp rating is lower in GT, you can get back to the weight break where you were in SS , at a lighter weight than when you left, with the same index.
Does this make any sense to anybody?
Also , seeing GT class was formed to allow a different year engine than the body you are using, would you have to claim the 283 as a 65 engine, or don't they care about that either?

[Sean Marconette]

Mark,
Where you need to pay attention is the min and max combo weight calculations in GT, as you are only allowed to be 250lbs above and below the natual class, at least that what I have found. It's a very helpful tool to play with what combo's could work, and what not to build! Dwight has really made looking at combos very easy.

Thanks Dwight!


Sean

[Dwight Southerland]

Mark -
Current rules do not require that the engine be a different year, so the guys with the Chevy IIs that run GT/K and L are just using the option to run a softer index with the same weight.

[Dwight Southerland]

Originally Posted by Rusty Gillis

Dwight this is a great tool and maybe I'm missing something but what if you have a replacement head and NHRA has added hp how do you look that up?

Rusty, what is the combination you are looking for?

[Rusty Gillis]

Originally Posted by Dwight Southerland

Rusty, what is the combination you are looking for?

Just about every engine that I could use in my 1967 Fairlane or 1969 Mustang with aftermarket heads has hp added. I know how to look it up on NHRA's site and today was the first time I looked at your site and was surprised that it was only listed with stock heads. It is a lot easier getting aftermarket heads when building these classic cars. I want to say again that you have done a great job putting this all together.

Rusty