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Old 10-10-2020, 06:17 PM   #230
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Member#: 437670
Join Date: Jan 2016
Location: VT
2005 2.5 SC OB

Default Why you don't need GR (11mm) Oil Pump in GD (10mm) Engine

Originally Posted by KillerBMotorsport View Post
I'd want to see ~85psi or better at that RPM. If the pump is sized right, the pressure will scale up with RPM. If the pump is too big, pressure drop may occur.

Thanks, it is a stock 7mm pump. If it does fine until higher rpms and then falls off should it be shimmed?

I want to say that I am seeing around 60psi at 6000rpm. I'm trying to rev to 7000 though. I'm not exactly sure if I should be looking at a 9mm pump, thicker oil (currently using 5w40 rotella t6) or shimming. Another option is a new 7mm pump, if perhaps the old stock one is worn and has lost some of it pumping ability. Perhaps the bearing clearances are higher due to age (208k miles).

there is no avls or avcs and also the supercharger is self contained oil so itís pretty basic.
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Last edited by pcampbell; 10-22-2020 at 07:56 AM.
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