i have a spare engine on the stand that uses a stock pump and has 10-30 driven oil in it. it does about 50psi spinning the pump about 900rpm. this is with stock half groove mains and stock bearing clearances. I also have another stock 440 I drive and it does about 50psi with 10-30 rotella and 180f temps.

Last edited by lewtot184; 04/10/19 08:07 AM.