Do I have a high volume or high pressure oil pump ?
I have a 383 stroker (less 1K on build) with a 7qt oil pan (total system capacity with oil filter almost 8 qts); running 10W40. I just installed a sunpro electric oil pressure gauge and at cold idle (600-1K RPM) I am seeing ~75PSI and ~85PSI at RPM. When the engine is warmed up to operating temp (160 F) I am seeing a drop in oil pressure at both idle and higher RPMS of ~10PSI to ~65PSI (Idle) and ~75PSI at higher RPMs (numbers approximate). I was wondering if anybody had a thought if the engine builder possibly put a high volume/high pressure oil pump in ? Thanks.
Last edited by y2k600f4; 12-15-2008 at 10:06 AM.