OK
Here is my problem, I have a fresh rebuilt 401 with cross drilled crankshaft, a bigger than stock cam, I installed the internal oil bypass line in the right lifter oil galley and put a restrictor in the left lifter bank, enlarged and added the drain holes in the lifter valley and timing chain cover bottom.
My oil pressure is 25-27 PSI at idle, 17-20PSI at 2000RPM, and 15PSI at 3000RPM. I don't want to push it past 3000RPM until I figure this out
The pick-up to pan clearance is 3/8" and I'm sure that the pan is not sucking up to the pick-up tube, which is good with no cracks. I double checked the clearance of the pump housing and gears, and everything is good there.
I've tried the NAPA gold filter and the K&N filter with same results. I'm still getting the same problems with the pressure drop at RPM.
Pulled the intake, removed and plugged the bypass line, and hooked up the drill. At full speed with a Dewalt 18volt I got steady 40psi, I didn't see anything obvious, some bleed by at the lifters and the pushrods kind of just pored out no gushing of oil, and not apparent hemorrhaging of the cam bearings.
I let it sit for approx 45 minute and restarted the drill two pushrods on the passenger side shot oil out then air popped out as if there was and air pocket some where in the back side of the lifter oil galley.
Have I forgotten to check something simple before I start yanking it out of the Jeep?
Bill