how much idle oil pressure does an evo need?

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Jul 8, 2024 | 05:51 PM

#21

Paintslinger16

Stellar HDF Member

Joined: Aug 2018

Posts: 2,323

Likes: 2,540

From: Milwaukee, WI

Quote:

Originally Posted by Dan89FLSTC

Do you mean the guy who posted in this thread in 2009?

yep! I didn’t resurrect it, just read it from beginning like you’re supposed to!

Jul 8, 2024 | 06:42 PM

#22

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,703

Likes: 7,887

From: poway

BTW @Huckster 20 psi is fine at idle cold.. If 20 psi with hot oil, you got one heck of an oil pump or you are using 80 weight oil..

Jul 9, 2024 | 07:47 AM

#23

Racepres

Seasoned HDF Member

Joined: Jul 2014

Posts: 8,517

Likes: 3,278

From: Cental, MI

Quote:

Originally Posted by Max Headflow

BTW @Huckster 20 psi is fine at idle cold.. If 20 psi with hot oil, you got one heck of an oil pump or you are using 80 weight oil..

Very cold.. I would personally prefer Less than 20

Jul 9, 2024 | 10:29 AM

#24

t150vej

HDF Community Team

Joined: Dec 2005

Posts: 5,351

Likes: 2,525

From: NC USA

The oil pump bypass is set to 20 psi. The light comes on at 5 psi.

The bypass can't dump enough off to compensate for cold temps and thick oil causes higher pressures.

Assuming correct (or reasonable) oil and warmer temps, a good pump will idle 12-15 and run 20psi.

The number 1 place of wear that causes low pressure is the tappet guides, especially the front.