Aftermarket Cranks

Mike Crutchfield · 11-19-2012, 06:11 PM

Terry / Tom
Concerning STOCK
There is not an approved list yet for cranks. At first NHRA did not think it would be necessay for a list because the only thing they were changing from the orginal rule was, it could be a aftermarket instead of a factory crank. It still has to have the Stock Configuration and stock pin size minus .070 no matter what can be read into it. The rod rule could be a little misleading but the bottom line is, you must use the stock size and lenght rod for the application.
I have spoken with Bruce recently and ask if he could clarify more clearly the Rod and Crankshaft rule. He indicated that there could be a approved list and a claification if the misunderstanding of the rules presisted.
Basicly the rule change was not a re-write of the rule just an addition. The intent was to allow after market Cranks and rods in the same as STOCK configuration that could be stronger and safer.
Hope this help clear up any misunderstandings.

Thanks
Mike C

11-19-2012, 06:11 PM	#16
Mike Crutchfield Junior Member Join Date: Nov 2005 Posts: 84 Likes: 3 Liked 4 Times in 2 Posts	Re: Aftermarket Cranks Terry / Tom Concerning STOCK There is not an approved list yet for cranks. At first NHRA did not think it would be necessay for a list because the only thing they were changing from the orginal rule was, it could be a aftermarket instead of a factory crank. It still has to have the Stock Configuration and stock pin size minus .070 no matter what can be read into it. The rod rule could be a little misleading but the bottom line is, you must use the stock size and lenght rod for the application. I have spoken with Bruce recently and ask if he could clarify more clearly the Rod and Crankshaft rule. He indicated that there could be a approved list and a claification if the misunderstanding of the rules presisted. Basicly the rule change was not a re-write of the rule just an addition. The intent was to allow after market Cranks and rods in the same as STOCK configuration that could be stronger and safer. Hope this help clear up any misunderstandings. Thanks Mike C