Originally Posted by y2k600f4
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.
It's a new motor, it's tight, give it some time.
Go to 5-30. I couldn't get my needle to stay in the gauge, topping 80 PSI even at idle, with 10-40. With 5-30 it sits about 60 PSI and up close to 80 under load.