GT clarification

jaf2021 · 08-30-2012, 01:15 PM

thanks mike i looked at the regular rating 275/307 instead of the gt rating 275/299 for 1967. The motor combo should be the same if i am correct(heads,carb#207). so all i would have to do is change my ss/ia to gt/e-g whichever weight i run. Is this correct?
thanks jason

Mike Carr · 08-30-2012, 03:51 PM

Quote:

Originally Posted by jaf2021

thanks mike i looked at the regular rating 275/307 instead of the gt rating 275/299 for 1967. The motor combo should be the same if i am correct(heads,carb#207). so all i would have to do is change my ss/ia to gt/e-g whichever weight i run. Is this correct?
thanks jason

Yes. Shipping weight of '66 Nova, divided by 299 (or whichever heads/trans you're using) = whatever class. And, you can add or subtract 250 pounds from the shipping weight to adjust classes.

richie 2 · 08-30-2012, 08:52 PM

so it seems that even though a replacement head may be better performance wise, using it taxes you in additional factored hp...therefore more weight?

Mike Carr · 08-30-2012, 10:14 PM

Yes. 5 hp in, say, GT/EA = 5 hp x 10 pound class = 50 more pounds over an OEM head.

08-30-2012, 01:15 PM	#1
jaf2021 Member Join Date: Oct 2004 Location: selmer,tn Posts: 111 Likes: 13 Liked 5 Times in 5 Posts	Re: GT clarification thanks mike i looked at the regular rating 275/307 instead of the gt rating 275/299 for 1967. The motor combo should be the same if i am correct(heads,carb#207). so all i would have to do is change my ss/ia to gt/e-g whichever weight i run. Is this correct? thanks jason

08-30-2012, 08:52 PM	#3
richie 2 Senior Member Join Date: Feb 2009 Posts: 971 Likes: 426 Liked 205 Times in 93 Posts	Re: GT clarification so it seems that even though a replacement head may be better performance wise, using it taxes you in additional factored hp...therefore more weight?

08-30-2012, 10:14 PM	#4
Mike Carr VIP Member Join Date: Nov 2001 Location: Enon Valley PA Posts: 1,650 Likes: 234 Liked 83 Times in 37 Posts	Re: GT clarification Yes. 5 hp in, say, GT/EA = 5 hp x 10 pound class = 50 more pounds over an OEM head. __________________ 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