Correct and upgraded Screaming Eagle oil pump

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#21

10-05-2024 | 04:38 PM

JMBasile

Stage II

Joined: Sep 2024

Posts: 2

Likes: 1

Quote:

Originally Posted by NorthWestern

I assume the SE pump has the same stringent requirements related to crank runout as the other high-end plates? I looked at the instruction sheet that comes with it, but saw no instructions related to checking crank runout

Check out this video from Master Tech Miller about the oil pump/ plate combo.

According to him the S/E plate/pump combo can handle 12 thousands of runout.

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#22

10-05-2024 | 04:50 PM

JMBasile

Stage II

Joined: Sep 2024

Posts: 2

Likes: 1

Quote:

Originally Posted by cobra23

I would go with a S&S or Feuling pump. No issues with them

I wouldn’t trust the S&S cam plate if not using a straighten and welded flywheel, cuz if it develops a runout higher than 5 thousands, the brass bushings cold twist causing the oil feed holes of the bushing to misalign with oil hole from the plate starving a lot of engine components of oil. The brass bushings from the S&S cam plate has no splines to prevent twisting the S/E cam plate does and won’t twist, and are designed to handle up to 12 thousands of runout.

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#23

10-13-2024 | 07:23 PM

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 17,322

Likes: 6,092

From: poway

So how does the SE cam plate allow 12 thou of runout.. By being 12 thou oversized?

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#24

10-13-2024 | 07:29 PM

NorthWestern

Club Member

Joined: Apr 2016

Posts: 9,408

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From: Inland NW

Quote:

Originally Posted by JMBasile

S/E cam plate does and won’t twist, and are designed to handle up to 12 thousands of runout.

This is the first I have heard this, and I question why and how they would accommodate this much.

Don't get me wrong, if this is in fact the case, it might help me make my decision

I am now torn...

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#25

10-15-2024 | 10:04 PM

porkster

Club Member

Joined: Jun 2008

Posts: 886

Likes: 201

Quote:

Originally Posted by Max Headflow

So how does the SE cam plate allow 12 thou of runout.. By being 12 thou oversized?

Right, also are they referring to TOTAL runout?? More details needed.

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#26

10-15-2024 | 10:47 PM

FranBunnyFFXII

Grand HDF Member

Joined: Oct 2018

Posts: 3,986

Likes: 2,965

From: Seattle

I think one of the advantages of the SE one is that the brash bushing is key'd in so it cant rotate like the SnS one can.
I doubt this has much to do with run out tolerance but I wonder if it helps.

When I pulled my SE plate out and looked at it I couldnt see any witness marks or anything that would make me curious or worried about run out, and I never measured the run out of my crank.
But I also installed it with faaaar more focus on trying to ensure it was centered.
I described the method I used to Master Tech Miller a while ago and he said I've got nothing to worry about.

I am curious how they managed to allow out to 12000 though.

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#27

Yesterday | 03:06 PM

evildiesel

Cruiser

Joined: Jan 2022

Posts: 125

Likes: 64

From: Ontario

im guessing the .012 will just wear the bushing until its happy because it will not rotate in the bore due to the splines.

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#28

Yesterday | 10:35 PM

Leimy

Road Captain

Joined: Feb 2021

Posts: 513

Likes: 198

From: Phoenix Arizona

Howdy,
Late to the discussion.
I have a 2017 Ultra 107. At 35K I did a cam chest upgrade. Prior to 2020 the oil pumps were NOT as good. Since I pulled everything apart, I replaced with the 2020 HD oil pump, cam plate.

I know the OP said it is on back order...

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