Quote:
Originally Posted by novassdude
If I remember correctly the heads were CNC from the factory? If that is the case how can NHRA prove that additional CNC had been done? Short of the cc's? When I first saw several years ago where CNC heads were installed on some of the super cars that clearly opened the door for additional porting. The thing I don't get from the article is the changing of the cam, to a larger grind? How can you tell this "Stocker" engine from a "SS" engine??
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In this case it wouldn't be very hard they bragged about it in a magazine article.[/QUOTE]
All the NHRA would check is correct port and chamber volume and for valve size.
When they refer to larger camshaft, they may be referring to the duration, which you are allowed to run any duration you want. The lift of the cam is the only limitation for the camshaft.