Gear Shifting Theory

[Dave 53]

At 176 degrees and idle, I'm getting 60 psi, not the specified 14 psi! My 10mm pump was around 14 psi at idle. Do I have a defective overzealous pump?

I'm using 5-40 oil. I'm measuring pressure from the right rear port and temperature from the front port. Bearing clearances are "normal" and I have a big oil cooler.

My pressure gauge is showing about 75 psi once warmed up which is consistent with the 78 psi relief spec.

[Sgt.Gator]

At 176 degrees and idle, I'm getting 60 psi, not the specified 14 psi! My 10mm pump was around 14 psi at idle. Do I have a defective overzealous pump?

I'm using 5-40 oil. I'm measuring pressure from the right rear port and temperature from the front port. Bearing clearances are "normal" and I have a big oil cooler.

My pressure gauge is showing about 75 psi once warmed up which is consistent with the 78 psi relief spec.

I've never seen 60 or 75 psi at idle when the oil is 180 degrees in any of my Subaru engines, race or DD. And especially not from the rear port which always reads lower than the front port. I think your gauge or sensor in that port is probably defective or calibrated wrong.

I guess we should rename this thread to oil pump discussion!