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Old 04-07-2017, 12:21 PM
PeteH PeteH is offline
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Join Date: Mar 2017
Location: Vermilion,, Oh
Cobra Make, Engine: FF 289Comp #8955
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If I understand you correctly, a mechanical gauge should have a small oil tube going to the back of the gauge directly from the oil port on the lower left front of the block, so you should be seeing a true reading of fluid pressure. Typically about 10 lbs higher at cold startup, and after everything warms up you'll see maybe a 10psi drop. Standard SB oil pumps are typically 35-40 psi. A high volume pump can see 60 psi, cold.
If this is not the case, and there is a sending unit with a wire, then it is an electric gauge, and the readings don't surprise me. It is basically an idiot light that goes to a gauge instead of a light.
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