440 oil pressure

[elacruze]

My newly-rebuilt 440 isn't showing good oil pressure. I haven't been able to check with a mechanical guage yet, but the electric shows only about 20 lbs. Is there some passage plug that can get left out and keep pressure from building? I put in a new sending unit, and no difference. Grounding the guage wire gets the guage to peg on the high side, and system voltage is about 12.56.

Thanks

Eric

[amxauto-x]

What pump did you put in and what are the clearences for the mains and rod bearings?

[elacruze]

It's a Melling high volume, not blueprinted or anything. The mains and rods are all at .0025", with one rod bearing at .0015".
It has a Milodon 8 quart pan and pickup.

Update:

Thread over. A mechanical guage shows 55lbs, right where it should be until I get a high-pressure spring.

Thanks tho.

Eric

[70Ted]

whats with the farm tractor pic??

[Mister Fiberglass]

55psi at what rpm? is this hot or cold? what weight engine oil?

[John Kunkel]

High volume pumps already have the high pressure spring.

[23T]

Originally posted by Mister Fiberglass
55psi at what rpm? is this hot or cold? what weight engine oil?

" how what when and where and did you get that bad gauge/sender fixed?