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Old 02-20-2012, 05:32 AM
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1/16 inch rings

Recently a discussion came up on piston rings.A guy said the 1/16 inch top rings used on many performance pistons don't last 20,000 miles. Always use 3/32 rings. I built an engine iwth forged pistons and 1/16 rings and it had no problems with about 50,000 miles on it.
Any truth to the short life of 1/16 rings?

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Old 02-20-2012, 06:28 AM
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No reason why 1/16" rings would have shorter life than wider rings.. Your guy doesn't know what he's yacking about.. Ask him about modern 1.5 MM rings that last two-three hundred thousand miles.
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Old 02-20-2012, 07:42 AM
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Quote:
Originally Posted by Truckedup
Recently a discussion came up on piston rings.A guy said the 1/16 inch top rings used on many performance pistons don't last 20,000 miles. Always use 3/32 rings. I built an engine iwth forged pistons and 1/16 rings and it had no problems with about 50,000 miles on it.
Any truth to the short life of 1/16 rings?
Smaller rings then that are being used in OEM engines today, A moly ring should not wear out as the cylinders would show more wear then the rings.
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Old 02-20-2012, 08:06 AM
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What Bob said is correct, the 1.5mm rings can be run for hundreds of thousands of miles. However what many don't realize when they do a engine build is proper bore cleaning. How many times I've seen guys completely skip it makes it no wonder the rings don't last long. They get the block back from the shop or they hone it themselves, they do a wash job on it and build it not realizing the grit from the hone stones impregnates itself into the cylinder wall and it has to be scrubbed with a brush and strong cleaner to get it out. So they install the pistons and rings with this grit still in the cylinders, when the engine fires up the oil and the movement from the rings knocks this junk loose and it causes two things, the rings to break in instantly and wear out within a very short life span.
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