Hey Guys
Question.....a brand new Merlin crate motor....572, 725 horse, naturally asperated motor.....what is "normal" for oil pressure? From 2,000 RPM and above it runs a constant 50 PSI....at idle, and below 1,500 RPM, it runs about 17 to 20 PSI. I am running straight 40 W oil.....and the max oil temp I am seeing is about 230 to 240 degrees. It has a 12 quart pan.....Is this normal??
10 psi for every 1000 rpms is normal, but i've seen alot of "loose" marine motor with 15psi at idle.once my oil temp is high, my idle pressure drops down to 20psi on the low end of my surge, and stays above 60psi when cruising with high oil temp. i'm also runnin a 12qt pan
i'm gettin a oil cooler over the winter, it helps keep pressure steady and seems to contribute to a long life in a marine motor.