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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,640
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That's the fattest area of the piston to remove material for lightening them. And since aluminum alloy is pretty light, you have to remove a sizeable area under the crown to have it add up to several grams.
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Kevin L '86 Carrera "Larry" |
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05-31-2016, 06:30 AM
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