06-25-2010, 12:29 AM
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#27 (permalink)
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A True Z Fanatic
Join Date: May 2010
Location: SLC, UT
Posts: 1,671
Drives: '08 Evo X | '10 370Z
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Quote:
Originally Posted by Jordo!
Good question -- I doubt they're forged...
Anyone have pics of them? Wondering how thick the ringlands are and how high up the rings are.
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The top ring land is probably very thick because of the crown height that comes with most 11:1 CR piston packages.
The easiest way to tell what material the stock pistons are is to examine the stock piston-to-wall clearance spec. If it's really minuscule (measured in ten-thousandths), they're hypereutectic. A clearance measured in thousandths would indicate they're 4032 forged pistons.
Though any shop who has built up a couple VHR's should know for certain. It's somewhat hard to tell by examining some OEM pistons, but there are tell-tale signs just like with crankshaft forgings.
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