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Old 04-20-2012, 10:50 PM
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rollie715 rollie715 is offline
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Quote:
Originally Posted by cobalt327
BTW, the second piston above isn't a SBC piston. Post #17 describers the SP 423 pistons- round, 4 valve relief. .
I think the Summit site was showing the wrong picture. Upon googling the part number I found this picture which might be a more correct photo: Quench area looks much better in my opinion.

ZWH423NP


This picture was found at this link, but doesn't match the 4 valve relief description either:
http://autoplicity.com/products/4118...c_pistons.aspx

I'm wondering with a 10cc dish, if this picture could be right with the valve reliefs taking up most of the volume. The picture shows a flat top in the quench area, but only 2 valve reliefs.

Last edited by rollie715; 04-20-2012 at 11:00 PM.
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