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Old 06-18-2012, 02:44 PM
$uperJoe $uperJoe is offline
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Default polished piston tops??

most pistons i have seen have a dull coat finish to the top of them. i would imagine its just the cast pores. some however have a clean machined look and almost seems polished. is there any difference in performance between polished and cast pistons? quenching? less chance for carbon to stick?
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Old 06-18-2012, 03:28 PM
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67cougar 67cougar is offline
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Removing any "sharp" edges can help if you are worried of detonation. Pistons that are cnc cut on top can look polished in comparison to non cnc cut forged or cast pistons.
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Old 06-18-2012, 04:37 PM
turbo2256b turbo2256b is offline
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I round sharp corners on domes, fly cuts for valve clearance, then pollish them like a mirror.
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