Oil pump flow

[hrdtail78]

Does anyone have any data on the oil flow of the HD m8 stock oil pump.  For both would be great. I see most aftermarket including SE advertise % above stock numbers but they never post a set reference. 

[ziggy24]

Most likely, the reason is that temperature, viscosity, tolerances, engine rpm, filter etc,  are all factors in oil flow. Without some type of standard, there is no way to produce numbers that would be consistent.

[hrdtail78]

I have talked with a few tech reps from different oil pump manufactures.  IMO it is all done with calcs and assumption based on physical size of components. 

[biggzed]

While I agree with your statement, they must be basing their "15% above stock" off something. The question is what is that something? As long as everyone compares their flow to the agreed base flow they should be defensible claims.

Zach

Most likely, the reason is that temperature, viscosity, tolerances, engine rpm, filter etc,  are all factors in oil flow. Without some type of standard, there is no way to produce numbers that would be consistent.

[hrdtail78]

The more any variable can be controlled.  The more accurate and useful a compare test is.  For better injector testing.  The fluid is heated for control over temp.  All matters and I agree.  One of the reasons I doubt it is being done.

[Hilly13]

You would think it would be as simple as picking a known CSA oil at a given temp and saying it will pump/suck thus compared to stock pump stats with same oil scenario, makes you wonder why so vague, never really thought about it before.

[ziggy24]

So they can say theirs is better, therefore you should buy our product. Who is going to actually prove it isn't?