09-15-2021, 12:46 AM
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#70
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Senior Member
Join Date: Apr 2020
Location: Phila, PA
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Re: Best B.O.P. stock and super stockers of all time
Quote:
Originally Posted by oldskool
Yeah, the factory 428 pistons had a small dish, to reduce CR.
BUT, I noticed that the NHRA specs describes the 428 pistons as "Flat w/notches". Don't mention a dish.
http://www.classracerinfo.com/Engine...0&MAKE=Pontiac
But, in order to get a piston made that NHRA would approve, I assume it would have to be made very similar to the original, including the dish.
But if not, stranger things have happened, concerning NHRA rules.
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Look at the next 2 columns after Flat w/notches. Dome/Dish Vol and Dome/Dish Hgt where it says No Spec.
Stan
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