Merry Christmas from NHRA HP adjuster

[Jim Cimarolli]

Originally Posted by Adger Smith

Bob,
Through all the 60 years I've been racing I have always heard the Corvette ratings were higher on like combinations because of the Stock Exhaust manifolds and the Stock Pan configuration. For the life of me I can't see how a Exhaust Manifold difference in all classes that allow aftermarket headers is even a consideration for HP variations. Now a Stocker with a Stocker pan.. I can see that there could be a difference...In Super Stock and Super Stock GT where aftermarket pans are allowed I don't see any reason to add HP to "like" engine combinations. Is NHRA Tech going back to some wheelbase considerations like in the old days with Ford and Mopar??

The 65 Corvette 425 hp 396 is a perfect example. in 66 it was rated at 375 in the Chevelle with a bigger cam!