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speaking of the relief spring and noting this is one of those stupid times where I understand imperial (psi) but the graph is in metric (kpa), it looks like the oil pressure is a little low at full noise too, isn't the relief spring 120psi/830kpa? -
No. All these dirty old Datsuns are shitboxes. Including the GTR. -
Yeah well I was thinking...there is nothing that happens when you get off the throttle that should cause low oil pressure, its not like clearances suddenly change or and the relief spring would close and in any case the sensor is on the feed side....so more likely there was no oil available to pick up which means all the basic oil control stuff to: 1. keep oil out of the head (restrictors) 2. get it back out of the head when it gets there (external breathers/oil return, drilling out the block and head oil returns) 3. have more oil in the sump to pick up - larger capacity sump 4. have more oil near the pick up - baffles
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In those logs I'm on the street but I did have to brake pretty hard, I had tried it where I also didn't get on the brakes too much after and still experienced the same issue. The sump has "some" baffles but I'd say it's fair to say not enough. I would agree with you and just turn down the oil pressure protection at least for now, but was interested to hear some opinions as I couldn't find any info on the problem. -
It's plugged into a grex sandwich plate so it's still bolted onto the motor. Interesting im glad I'm not the only one to experience this then ahahah
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