full groove main bearings oil pressure ?

Why not put the high pressure relief spring in the oil pump?

Whether you run a stock or HV.


You are having a problem with PRESSURE, not VOLUME. It makes more sense to use a high pressure spring to increase your pressure versus trying to throw more volume at it. However, It wouldn't hurt to go with the high volume oil pump AND the high pressure spring.

I've ran the high volume Mellings pumps with the high pressure spring for years and hundreds of thousands of miles without any problems on daily drivers with stock 5 quart oil pans.