I have an almost new Pace Oil Pump on a formula ford & despite turning the pressure right down it is still pumping at 150psi and blowing oil filter seals. I've pulled it down and all seems okay. Any ideas?
Take the pressure relief spring out and make sure the plunger is not seized. If you have proper bearing clearance and the correct weight of engine oil, you should not see 150 psi even with no pressure relief at all.