oil pressure dropping to 0psi
Looking for some ideas here. I have a 360ci Dart little M billet block with restrictors in both ends of the lifter oil galleys, Peterson external wet sump pump, Bryant crank, Carrillo rods and no oil pressure after a couple of laps. It has a billet flat tappet cam & DLC lifters along with spring spray bars. No cheap stuff here but definitely not working as is.
I had this motor on the chassis dyno a couple of weeks ago and had no problems. We had our first track time this weekend and immediately started suffering a loss of oil pressure. It will run normal pressures for a few laps and then go away. Shut it down and restart pressure ok again. I installed the Go Pro camera pointing at the gauge and sure enough it would drop to 0 for a split second at the end of the straight. I tried adding additional court of oil, but it did not help. I then removed the oil lines going to the valve spring spray bars. This helped and allowed us to continue our testing.
I can live without the spray bars if needed, but when we got up around 8000 rpm our problem started coming back. I am afraid to take this to a bigger track as is.
Any ideas on how to solve this problem. I have a #12 line off from the front of left valve cover going to a breather can. Is this possibly the culprit. Something is causing my 7qrt pan to run dry. Not sure how to get it back to the bottom any sooner.
I would appreciate any help from some of you who may have had similar experiences.