oil pressure
Changed the oil pump on Sunday, I installed the pump that was in the motor before it was rebuilt that worked fine. Set the oil pick up to 3/8 from bottom of pan added a factory filter and still start loosing pressure at somewhere between 5500 and 6000.
I called Melling and they think the pump is cavitating, but this pump did not cavitate in this engine before up to 6800
The only thing I can think of is I had the builder add a torque plate to stiffen up the motor. Any ideas? I am stumped.