Jeff Spitzer wrote:

It doesn't matter what the motor does.  If the pump is designed for high
pressure usage then the designer never has to worry about low pressure/high
flow cavitation.  The big difference here is magnitude.   If you pull out a
well pump and stick it in a bucket the pressure will drop by 10x-100x.  Any
changes to a 13B cooling system will max out around 2x pressure difference.
 Plus 2x pressure may be too much and reduce the flow to insufficient
cooling.  Minus 2x will not increase flow enough to cause damaging
cavitation such that artificial back pressure is called for.

Jeff Spitzer

 
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