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Posted by MoparNorm on Thursday, February 14, 2008 at 13:56:03 :
In Reply to: Not a swap posted by Norcal Dave on Thursday, February 14, 2008 at 13:45:00 :
..running at a constant rpm and speed is harder on a motor than varying rpms and ranges.
The cam, the bearings, rings, etc are all staying and wearing in the same exact spot at the same exact repetition. That's much harder on a motor than a motor that runs fast, then slow, then fast then slow. The cycles allow cooling of parts and changes in lubrication, and eliminate harmonics, etc.
When you break in a cam or rings, you do so by varying the rpms.
When you tear down a motor you can see wear patterns from constant rpms or speed.
The swap info was thrown in for those who, in a previous thread, where looking at industrial motors for swap candidates.
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