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Old 11-17-2011, 10:20 PM   #65 (permalink)
Frank Lee
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That's not my explanation but I've bought into it. They are saying why it's an inverse u.

WRT friction, I would think internal friction has more variables than just plain ol' rpm; I suspect as loading gets higher on the piston it slams harder onto the cylinder on the thrust side thus having more friction, plus the higher chamber pressures are going to drive the rings onto the cylinder walls harder.
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