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Tommy;

My 454 magnum would run at 60 psi at rpm and idle at about 30-40 psi. BUT, I think that the type of guage has alot to do with the readings. My guages are stock from Checkmate, they have electric sending units which are not the most accurate.
 

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Tommy,
Are you running Gaffrig gauges? The merc senders are not compatiable with them. When I replaced the Merc sender with a Gaffrig the oil pressure went from 42 to 60. I don't understand why the manufactures don't spend a little more time and money and make it right in the first place.:confused:

Dan
 
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