Re: maximum rpm, personal choice...
Quote:
Originally Posted by Werner
A measure of the maximum engine RPM is the average piston speed. This is used for engine designs from the 1960s at 18 m/sec. specified.
Our gray cast iron heavy A engine with uncertain mass balance should not be rotated beyond this limit.
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You win. 
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The Master Cylinder
Enjoying life at the beach in SoCal...
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