Normal PSI operating range of VE pump

[sparks57]

What is it?



I know it's not anywhere near what the P7100 puts out.

 

[1stgen4evr]

VE psi

I am just getting into pump stuff and can not give a definitive answer. I think the psi will be similar but the volumn will be greater for the P series pumps.



One thing I am sure of is that someone in the TDR group knows. Have you noticed the membership going up. We might get enough folks to elect a president if things keep going like this.



1stgen4evr

James

 

[sparks57]

Pastor Bob knows...



But for clarification, the P7100 puts out a lot more PSI and fuel than our pump... that's why everyone want's one!

 

[JLEONARD]

CB,

I have the VE manual in pdf format.

Send me your private e-mail address and I'll send you a copy..... it has the info you are looking for.....

as long as you re-inburse me for the shipping.



-- email address removed --

 

[cerberusiam]

The VE pump thread at the top of the 1st gen forum page has a lot of info on the VE pump. The pop off on stock injectors is 240 Bar or about 3600 psi. If memory serves me the VE pump will generate up to 8000 psi internally but it doesn't live long trying to push volume at high pressures. I think Dave Fritz's dodgeram.org site has a comparison on the VE, P7100, and VP pumps as far as the pressures generation goes.

 

[sparks57]

Thanks guys.



park5476@uidaho. edu

 

[Gary - K7GLD]

There's lots more involved in efficient injection pump operation than mere basic PSI and/or volume. When and how that fuel is injected has as much or more impact on engine operation than the pure basics - that's why guys with the older pumps spent time sliding plates and making misc. other tweaks for more efficiency for their particular needs and wants - and MOST of those tweaks had one downside or another, lots of smoke, reduced MPG, poorer engine operation at ONE end of the spectrum in order to make gains in another...



If only basic PSI and volume were enough, we'd still be using the injection systems as they were in the old Caterpillar orchard tractors since the early 1900's - good for hard work and long life - but very limited in flexibility.



As much as we complain about pumps like the VP-44, a few years back, we woulda KILLED for a pump that would INSTANTLY change timing and pump volume to match engine demands - and have the ability to permit outboard installation of power boosters that make even greater power outputs possible while still allowing normal operation at the push of a button, from the drivers seat!



Weakness, downsides? Yeah, some - and to each his own - but for ME, *I* sure don't wanna go back!



End of sermon...

 

[sparks57]

Actually I was asking more so I can choose the correct fuel pressure gauge with the right PSI range!



Thanks for all the info!

 

[Gary - K7GLD]

UMMmmm - you're putting a PSI guage on the OUTPUT of the injection pump? That appears to be the case from the lead post - pretty unusual...

 

[sparks57]

Woops... ok.



I'm confused now! What PSI are you supposed to read on the gauge?



Sorry, I was thinking the wrong way!

 

[Gary - K7GLD]

USUALLY, guys will monitor PSI supplied by the lift pump going into the injection pump - and a 0-15 PSI guage will usually do the job...

 

[sparks57]

OH!!!! Ok, I get it now.



What should our lift pumps be reading?



I think we've decided that supply side pressure does little for performance... is it something I should keep an eye on?

 

[Gary - K7GLD]

I'll let the owners of trucks like yours answer that one - good luck.

 

[cerberusiam]

Chris, supply side pressure does make a difference in performance and longevity, especially on the VE pump. You will want a pressure gauge between the filter and pump to monitor supply pressure. The pressure should run 7 to 10 psi all the time. You can drop under the 7 at WOT without any problems but when you start getting down around 1 or 2 with some heavy fueling you run the risk of cavitating the pump and on the VE that is very bad thing.



I was wondering where you were going with this. Should have known you were looking for more dials to read.

 

[sparks57]

I just want to get some more readings from my engine... I'm a worrier so I want to be able to see what's going on.

 

[sparks57]

Originally posted by cerberusiam

Chris, supply side pressure does make a difference in performance and longevity, especially on the VE pump. You will want a pressure gauge between the filter and pump to monitor supply pressure. The pressure should run 7 to 10 psi all the time. You can drop under the 7 at WOT without any problems but when you start getting down around 1 or 2 with some heavy fueling you run the risk of cavitating the pump and on the VE that is very bad thing.



I was wondering where you were going with this. Should have known you were looking for more dials to read.

Yes, but Pastor Bob pointed out that elevating the supply side pressure beyond that does little.



At least that's what I thought he said!

 

[dpuckett]

Originally posted by cerberusiam

I was wondering where you were going with this. Should have known you were looking for more dials to read.

As if he doesnt already have enough things to go bump in the night and make him jump What's next? I say he needs to just gut his OEM dash and put about 15 gauges in there, make it look like a semi- oil, front, rear diff temp: water temp, trans temp, amperage draw of stereo, volts, etc, etc.



Just kidding ya, CB. You youngsters need some ribbing now and then. Just wait till you start a business and have some bills to pay. Then throw in a court with a crooked judge... .....



Daniel

 

[cerberusiam]

You be correct. However, when pressure drops on the supply side, for whatever reason, performance suffers so it is technically true that supply side pressure has an effect on performance.





Thats way too anal, time for a beer!

 

[sparks57]

How about I just get into the business? Maybe start my own diesel performance shop?



That would be soooooooo cool!



I actually have been thinking about removing the dash cluster and redoing it...

 

[sparks57]

Originally posted by cerberusiam

Thats way too anal, time for a beer!