The engine builder put a high volumn oil pump in my new engine. I finally got it running and it pegged (and stuck the needle) on my oil pressure gauge. My old engine used to run at 50 psi. What PSI should I expect from the new high volumn pump?
Depends on how tight the clearances are in the engine. 70-80 psi,(or more) cold at idle with 20W-50. Both my engines (roller 302 and a roller 331) have 40-50 psi cold with std pumps.