frenchyd said:It takes the same power to pump the oil no matter if it’s relieved afterwards or not.
Maybe I'm misunderstanding what you're saying here but the power needed to drive the pump is proportional to the pressure regardless of where it's relieved. If you're pushing 100 PSI without a relief valve but it drops to 60 PSI with one then it's going to take less power to run the pump with with relief valve.
Could a gasket involved with the distributor rebuild be partially blocking one of the oil ports?
i agree with earlier opinions: if nothing has changed in 20 years and suddenly the oil pressure goes up at the same time that the distributor was removed and rebuilt, I’d bet dollars to doughnuts your issue is somewhere there
The pump drive loss is reduced by the relief valve opening. That sort of ties into something nobody mentioned which is that too high of oil pressure CAN have a terrible side effect which is to snap off part of the drive mechanism. It takes several horsepower to make all that oil pressure at that flow rate, and several hp is flowing through some pretty tiny parts in some cars. It's gonna be case by case whether anything breaks, but that's a known problem with putting too much load on an oil pump.
Any progress with the pressure?
No time to dig into it right now, unfortunately. I'll update when I have something - maybe over the weekend, with any luck.
In reply to jfryjfry :
Agreed. Possible the gasket is missing the dump hole?
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