I need to lower the oil pressure in my 340. It runs at 90 psi cold and 60 hot(2000 rpm). I changed to 10-30 oil to get these numbers, it was higher before.
The engine was built for the strip and I just dont need this much pressure. I get an occasional 6000 run, but not much above that often, and not for extended time.
Would I be better off replacing the pump or trying to lighten the relief spring?