NHRA Disqualifies Two Competitors during the Chevrolet Perfo

Mike Schwartz · 09-06-2014, 12:17 AM

Classracerinfo.com shows a spec of 3.5" upper and 8" lower on the pulleys for the 2013 CJ (2014 won't load). If you are using OEM pulleys and wanted to argue that the OEM manufacturing tolerances are unknown, how much deviation from the posted specs should you be allowed? Up to 1%? 5%? 10%? At what point does it become an unfair advantage?

Does anyone know how far off spec the pulley actually was?

09-06-2014, 12:17 AM	#9
Mike Schwartz Senior Member Join Date: Feb 2006 Location: Maryland USA Posts: 533 Likes: 129 Liked 248 Times in 89 Posts	Re: NHRA Disqualifies Two Competitors during the Chevrolet P Classracerinfo.com shows a spec of 3.5" upper and 8" lower on the pulleys for the 2013 CJ (2014 won't load). If you are using OEM pulleys and wanted to argue that the OEM manufacturing tolerances are unknown, how much deviation from the posted specs should you be allowed? Up to 1%? 5%? 10%? At what point does it become an unfair advantage? Does anyone know how far off spec the pulley actually was?