Common block 2.5, reverse rotating water pump. Discussion related to issues being observed with MeanMini. But, since this is puzzling, i figured i would fish a bit.
Question: when and how would you expect to get water pump cavitation?
High rpm? High coolant temp & high rpm?
My understanding is Cavitation is mainly caused when at the pump suction, the pressure is lower than the flash point at the given temp. The fluid vaporizes, all or partly and you get vapor at the pump suction and passing through the pump.
Question 2: Does cleaning up the waterpump housing, smoothing the casting, and removing casting flash in the volute and discharge section of the pump, smoothing the angle at the top, etc. have an effect on the pumps likeliness to cavitate?
Question 3: Is the Ed Peters suggested mod of removing every-other blade of the pump impellar only for the early waterpump? Or applicable to the later common block reverse rotating pump? - The impellars are quite different.
Thanks for any insight and discussion.