Quote:
Originally Posted by cobra 53
Gary, Thanks for the explanation.
New oil is 10/40 and the oil pressure gauge still marks between 50-60 psi idling with warm engine. Turning up to higher rpm it marks at 70 psi.
How can I see or check the pressure rate of the installed relief spring? I know there are different spring rates available (Youtube, Melling oil pump Videos).
The HV pump conducts enough oil, so I think it would be possible to go with a lower spring rate.
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You might find benefit in going to a thinner oil again, like 5W30.
You then might end up with 30-40psi at idle and still have 70psi as a max, although at a little higher rpms.
I wouldn't bother changing the spring to lower the maximum, it's fine at 70psi.