Quote:
Originally Posted by Kube
Okay, NOW I believe I understand. You are replacing the oil pump with the type that has the integral relief valve. Correct?
If so, you will want to increase the spring pressure on the valve beneath the valve chamber cover. Use the ball with the flat but increase the spring pressure.
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That’s if he wants the entire system to operate at the 80psi setting of the 8BA oil pump. If he puts the 50 psi spring in the block pressure relief, the entire system will live at 50 psi. The oil will always seek the easiest way out of the closed system.
Operating the oil pressure system at the higher (80) pressure on a pre 1941 block (using the crankshaft slingers at the rear main instead of the rope seal design) may result in some oil leakage out past the rear main bearing. I’d love to hear from any builders out there who did a non-rope block with the 80 psi system and can offer any first hand experience with the issue.