Being recently rebuilt, would it have had a new Melling M-63 oil pump installed? If so remove the "new standard" pink spring and replace it with the older BB oil pump original standard black spring. The last 3 that I have done idle at 25-28 psi hot. If that does not work then you probably do have increased bearing clearance, which is totally understandable for a Hemi.
HTH
Randy
Looks like a new Melling, and that is what I did, I took out the pink spring and installed black one one from a older pump which seemed to increase the top end pressure a bit, and the speed of increase but idle pressure stayed about the same. I will try a straight 30w and see if it can give me above 20ps, I can live with that.
Not high volume but changing to a high pressure pump...would that bring up the idle pressure?
