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Old 12-13-2012, 07:07 PM
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The valve reliefs go below and outside of the circle's diameter.

I have CC'd a piston having a 0.080" deep dish, but w/o the deeper valve reliefs like that piston seems to have (if the Summit photo is actually representative of the piston and not a stock photo). The volume for that Chevrolet production piston is 11cc.

The piston in question will have a slightly larger volume than the GM piston, if the reliefs are actually as depicted in the Summit photo. That's why I added "11-12cc" to my answer. In actuality the volume is probably a bit more than 12cc.

More: Dish volume

Last edited by cobalt327; 12-13-2012 at 07:16 PM. Reason: Add link.
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