Need help 427 low oil pressure ?

[priobe]

Hello All,

Ok update I spoke to the Engine Builder and he told me that the mains are : .0022 and the rods are .0025

I think that this falls with in specs.

I pulled the pump and everything looks fine. I called Melling and they told me to determine if it is a Hp pump the gears will be 7/8.

A HV pump will have 1 3/32 tall gears. I will check measurement tonight.

I pulled the pump apart and everything looks fine. I am thinking of replacing the spring in the pump or would you guys recommend replacing the entire pump?

I guess next stop will be the bypass at the back of the block. I really dont want to pull the tranny

[patrickt]

Originally Posted by priobe

Hello All,

Ok update I spoke to the Engine Builder and he told me that the mains are : .0022 and the rods are .0025...

FWIW, the clearances on my SCAT Stroker Crank are greater than that (.003 and .0028, respectively). With the Melling M57 HV Oil Pump, remote Moroso filter and oil cooler open all the time, my pressure (with the oil as hot as it ever gets in the low 90s on the Smiths gauge) at idle is around 20 or even a couple pounds below. It comes immediatley up when the throttle is applied and is in the high 50's at anything above 3000 or so. Cruising at 2000 or less it might be in the high 40's. BTW, it's a a solid lifter cam and all of these numbers are just fine.