Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Ring gap for hypereutectic pistons.
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Old 11-16-2010, 01:49 PM
bprumos bprumos is offline
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apparently the oil rings dont need anything special, but ive heard the ring gap is supposed to be tighter on hyper pistons cause they dont expand as much and are a tighter fit in the bore when thier cold. i dont know if thats true as ive never personally delt with them first hand. from what i remember it was something like .010 smaller than cast pistons. so maybe more like .003x1.00in bore. i would call the piston manufacturer though and see what they recommend since they know all the details on the expansion rate of their pistons and what tolerances they feel is necessary for proper life and operation of their pistons. id listen to their recommendation unless i had hard evidence to say that their numbers were too loose or too tight. thats my .02 hopefully im of some help
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