Quote:
Originally Posted by e*clipse
Given the critical nature of the pump in the second scenario, I've spent a bit of time looking for good options. Here are a few things I've found:
1) electric oil pumps for turbochargers. Good ones are made with the knowlege that if the pump fails, the turbo will quickly fail. Problem: they cost as much as a used MGR.
2) Oil pumps for motorcycles. I've found good options from Harley Davidson, BMW, and some Kawasaki racing bikes.
3) The Prius transmission's oil pump
The pumps for the Prius and the motorcycles are all gerotor type pumps. In general, gerotor pumps can be described as one gear inside an internal gear with 1 tooth difference between the two.
We may be able to drive a pump directly from the motor. There's a vibration damper which seems to me to be merely a chunk of steel bolted to the outside of the motor side of the MGR case. It is concentric with the motor bearing, and it may be possible to drive a pump by removing the balancer and replacing it with an oil pump.
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I'm not much help with the mechanical stuff. I understand that you would need to remove the heat, and to lubricate the motor and gearbox.
Options 1,2, and 3 all seem reasonable. Costs must reflect the risk of damage. There is no point protecting a $400 motor with a $400 pump.
Driving the pump directly sounds like a great idea, but it sounds hard to do.