Cm871 new oil pump pressure

[Bigstank]

Hey guys I was wonder with this new oil pump that cant be shimmed. What should the pressure be? Mine runs 35lbs @ 1500. The old pump before the rebuild was 40lbs. Anyone else run the new style pump and what's your pressure

[Lonestar10]

pretty sure new not NOS but the actual new ones their coming out with now are suppose to run at the pressure a shimmed old style does.

[Bigstank]

(10-05-2019 )Lonestar10 Wrote:  pretty sure new not NOS but the actual new ones their coming out with now are suppose to run at the pressure a shimmed old style does.

IDK MrHag just rebuilt mine last month and the pressure is less. It also drops pressure as the rpm drops. @1400 its 33psi and 1300 its 31psi. I was trying to figure it out cause I also got a new X15 and it runs 40psi @1500

[Unilevers]

thats low - all mine with the new pump run 40ish. old pumps i shim slightly over 40. something sounds weird there.

[Bigstank]

(10-05-2019 )Unilevers Wrote:  thats low - all mine with the new pump run 40ish. old pumps i shim slightly over 40. something sounds weird there.

That's @ 1500rpm

[Lonestar10]

maybe you got a NOS pump instead of a NEW design pump im sure some places still have the old 35-37PSI pumps on the shelf and im guessing there has to be something to look for to tell if its old design or new design when your replacing.

[Volvo8873]

Could very welll be the gauge itself...

[Bigstank]

(10-05-2019 )Volvo8873 Wrote:  Could very welll be the gauge itself...

Could be the gauge idk I'll check tomorrow.

[Bigstank]

(10-05-2019 )Lonestar10 Wrote:  maybe you got a NOS pump instead of a NEW design pump im sure some places still have the old 35-37PSI pumps on the shelf and im guessing there has to be something to look for to tell if its old design or new design when your replacing.

What's a NOS pump. Sorry to sound dumb on ya lol