too much oil pressure?, high OT on the freeway Options

[VaccaRabite]

My 2056 is getting elevated oil temps on the freeway. I am using a high volume pump, and seeing about 40 pounds of pressure on the freeway when my oil is up to temp.

What I think is happening is that there is too much pressure, and the oil is not being pumped through the oil cooler due to the check valve closing the passage. However, this is just a guess, as I don't have any way to test it. All I know is that when I am driving at revs, oil temp goes up and if I keep driving at higher revs the oil temps stay up). if I drop revs, oil temps fall back into place, but I can't do that on the freeway without building a lot of head heat.

Before I go through the trouble and expense of adding an oil cooler, I want to make sure that I have checked out the simple fixes first.

What do I do to make sure oil if going through the oil cooler? What is the point where pressure cuts off passage through the cooler?

All tin is in place, and fan housing flaps divert air over the oil cooler 100% of the time (no thermostat in place, so the flaps are always set to cool).

Zach

[HAM Inc]

Zach the pressure bypass drops the pressure in the entire circuit from the pump to the bearings. It doesn't matter which end of the circuit the relief occurs. That is the cool thing about the circuit design. Bypassed oil has already been through the cooler before it is dumped back into the case. And since a certain amount of oil is always being bypassed (if the system is working properly) you have a % of oil that routes through the cooler more than once before it sees the bearings.
By tight piston clerances I meant the piston to cylinder clearance of the 4 pistons.