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-   -   402/375 pistons (https://classracer.com/classforum/showthread.php?t=88155)

Jimmy70RSSS 09-09-2024 03:35 PM
402/375 pistons
 
I bought an old 402/375 iron head combo. Pulled it apart today and it has CP pistons C8-CP. The ring grooves and rings are thin. Is this legal? It?s definitely not the stock width ring grooves. No spacers were used.

ss3011 09-09-2024 05:00 PM
Re: 402/375 pistons
 
Sounds like you have some Super Stock pistons. The real answer is the ring grooves

should probably be 5/64, 5/64 , and oil groove 3/16 .

Jimmy70RSSS 09-09-2024 05:22 PM
Re: 402/375 pistons
 
The part number is on the list of accepted pistons for stock eliminator. That?s why I was shocked to see the thin rings with no spacers.

1347 09-09-2024 05:58 PM
Re: 402/375 pistons
 
Quote:
Originally Posted by Jimmy70RSSS (Post 702656)
The part number is on the list of accepted pistons for stock eliminator. That?s why I was shocked to see the thin rings with no spacers.
Probably why looking at the top of the piston for an approved number in teardown may be deceiving.


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