273 Commando Rebuild Oil Pump Selection?

The issue with a high volume pump is you should run a hardened oil pump drive shaft. It takes a lot more force to turn the HV pump.

I do know the HV pump will chew up a roller cam bronze gear style quicker. Especially with heavier race oil on start up. If you have the pan down on a engine with high mileage HV pump is a plus. Not alway the case with fresh builds.

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