Thread: Small block race motor odd problem

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is the oil pump drive gear pinned on the shaft . on the by pass i hone them a bit with a BRM guide hone and polish the by pass piston some times . have you check to make sure the pump plate is not getting cut in by the pump gears from the dist being to long and pushing on the oil pump plate. i would do like said .look at the drain back . were do you have the line for the oil gauge. line some were is it getting pinch . are you using no -4 or -6 if not i would and i do .have you tried a new gauge? look at the pump see if it laying flat on the main cap ?do you have a cam bearing that is spun ?will the oil psi go up after it sits . if so it is a drain back or mains and rods are to big on the oil clearance and the pump can not keep up when oil warms up.