- Sep 1, 2018
If it drops back and stays there then maybe it's the pressure regulator in the pump. Might be time to try another pump in it.I agree on the oil pressure, that's why with factory type clearances in the motor I just run a standard volume pump. I am on my second mechanical gauge with the same results. At around 4000 rpm the oil pressure drops back from 50 to 40 and stays there until I let off the throttle.