HPOP hump vs no hump

[Dale_Lakin]

What the world are people talking about when they make reference to the "hump" on some HPOP's? I have a couple of each in stock and it looks to me that there is no difference but I really don't know where to look.

 

[CHPMustang]

What the world are people talking about when they make reference to the "hump" on some HPOP's? I have a couple of each in stock and it looks to me that there is no difference but I really don't know where to look.

Dang you got me on that one Dale

 

[BIG JOE]

What the world are people talking about when they make reference to the "hump" on some HPOP's? I have a couple of each in stock and it looks to me that there is no difference but I really don't know where to look.

Me too Dale..... What portion of the HPOP is being referenced when the term "HUMP" is used ??

 

[roosterdiesel]

I've read where the "hump" pumps are the more desirable. What's the difference? I think the the one's with the humps tend to put out a little more pressure. Maybe Bean will chime in and enlighten us!

 

[bdp]

Dale, look on teh back of the pump, there is a plate that has a snap ring on it. That plate on most pumps is flat, just a flat plate. On the desireable ones there is a small step in that plate. when you find one you will know.

 

[Dale_Lakin]

I have both the F81Z9A543BRM and the F81Z9A543CRM on my desk right now and they both have the hump.

First picture is a BRM second one is CRM

 

[bdp]

Thats the bugger in teh pic.

 

[Dale_Lakin]

What is all the Hub-bub bout Ryan?

 

[bdp]

From what I understand the one with the hump has 2* more swash plate angle then teh other one, that translates into more flow.