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]

If a percentage of the oil is always going through the cooler, would adding a stiffer spring to the relief valve increase or decrease the percentage of oil going through the cooler? Or would it give no change to the oil going through the cooler?

The stiffer the spring the higher the oil pressure and therefore the less bypass oil. Zach what is your oil pressure at the highest temps, 235-240?

Just to ask the question... What is the mechanism for the high oil temps with tight pistons. Is it just ring-wall friction wear that causes it? Or something else?

The friction is from the pistons dragging down the bores. Piston friction also increase if the jugs aren't square to the crank center line. That also leads to poor head sealing too. The head sealing issues are not as easy to pickup on as you might think. Jake is damn good at detecting it, but he has had some practice!