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Old 11th Feb 2017, 05:24
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Big Pistons Forever
 
Join Date: Jan 2004
Location: Canada
Age: 63
Posts: 5,209
Received 134 Likes on 61 Posts
The only time this would be an issue in a normally aspirated engine that is properly set up is at very high altitudes like 15 K +. To generate enough power to hold altitude you have run with high RPM but the max MP will only be in the teens and there will be not sufficient cylinder pressure to hold the rings firmly against the cylinder walls.

The result is scuffed cylinder walls and damaged rings. I have only seen this once in a C 182. After the owner insisted in in trying to cruise at very high altitudes his next annual found all of the cylinders with very low compression and a lot of blow by past the rings. 12 K USD for 6 new cylinders fixed the problem
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