Nhra no bigger than stock cam journals
 

http://www.nhraracer.com/content/gen...416&zoneid=132 So does this mean next year they will be checking for these big 55 and 60 mm cam journals.

Re: Nhra no bigger than stock cam journals
 

Probably not.

Re: Nhra no bigger than stock cam journals
 

Check out this older thread, specifically post #23:

http://classracer.com/classforum/sho...nal+cam&page=3

Re: Nhra no bigger than stock cam journals
 

This didn't last long, it has been removed from the site.......

Re: Nhra no bigger than stock cam journals
 

Yeah Mr Derby City, NHRA must have figured 95% of their stocker fields would not be in compliance!...lol

Re: Nhra no bigger than stock cam journals
 

In 2010 Pat Cvengros wrote: The cam shaft may be of the larger journal design. Must use babbitt type cam bearings. Non-roller design.

Based on the above letter, you would think it would be permissible to run a big base circle cam. When considering all the changes to stock NHRA has made today with stocker heads, why would NHRA enforce a stock base circle cam. Pat Cvengros caused plenty of people to utilize the larger base circle cam which I believe would be very costly. A clarification needs to be made so racers know which way to go. The other question is how much could the big base circle cam help. It may not help at all!

Re: Nhra no bigger than stock cam journals
 

But it sure would be an expensive way to find out.

Re: Nhra no bigger than stock cam journals
 

Well, it was pretty stupid to rescind approval, long after the fact, of a relatively expensive modification to a pretty expensive part.

Further, given the other absurd rules for Stock valvetrain, allowing those cam cores helped re-level the playing field that was thrown way out by the other rules.

I'm not necessarily in favor of ANY of those rules, but if you're going to allow some to gain an advantage by opening some rules, you create an artificial advantage. And that's the problem with continually loosening the rules.

Re: Nhra no bigger than stock cam journals
 

delete

Re: Nhra no bigger than stock cam journals
 

The reminder on NHRA for this rule also included larger diameter lifters, which i believe there are more of those then large journal camshafts. Either way there are a lot of blocks out there that would be not usable in stock anymore.