Normal PSI operating range of VE pump

[sparks57]

Has anyone toyed with a newer lift pump that doesn't drop at WOT?



Does that drop do anything to performance?



Is it something I should worry about when I bury the fuel screw when I get my EDM's???

 

[cerberusiam]

The good Pastor's sojourn into the Land of POD convinced him there was an issue when burying the fuel screw. I don't remember if he had any pressure figures but the gist if it was the pump was pushing more fuel than the pump could get. I think that was about the time he decided a bigger stick was in order.



'Course ya never know with him, he loses his stick frrequently!

 

[sparks57]

By stick do you mean lift pump?

 

[Gary - K7GLD]

Stick USUALLY = camshaft...

 

[sparks57]

I do plan on getting a piers cam this summer... but I thought he was making a sideways quote from Roosevelt...



"Speek softly but carry a big stick" type of thing...



You never know with cerberusiam...

 

[cerberusiam]

Been a while since I heard that term, bump stick = camshaft.



Naw, I aint smart nuf to make them there sideways comments.



The good pastor is always looking for his stick, never know if he means something or the big A is sneakin' on him and he lost his cane... .....





I figure he's gonna 'annoint' me soon... ... ... .

 

[prototech]

if you get many more gauges in there you might not be able to see out the windshield!! what would be ideal is a computer that would monitor all these critical points and let you down load a log sheet to your pc every so often and show trends and stuff! this would work really well when changes were made!

Proto

 

[sparks57]

Well, people keep saying that... but I can't find anyone that makes a program for that!

 

[dpuckett]

He!!, Chris, you're smart enough to come up with a program for that. Give you something to do on slow days.



Daniel

 

[sparks57]

I have taken some programming classes, and I know c++... but that would just be a PITA! I would need a processor unit and all kinds of other crap...



That would suck.

 

[BushWakr - RIP]

... I HEARD THAT... !!! ... .



Ok, the "manual" says the VE is good with PSI as low as 3psi... ya right !!!! what do they know... see they weren't thinking of that pressure applying to a 3K RPM run... I don't know were their heads were at... . errrr, maybe I do. .



Ok, if you have a stable supply at 8-10psi then even at WOT (3450 engine RPM... I got it right this time. . ) the VE will do it's job...

We ran the supply pressure for fits and giggles, up as high as 18-20psi on the stand. No difference was noted in the pump performance. There is a drop in CC/1000 as you go up in the RPM band which I feel is governor related. While there was some discrepancy between a "test pump" and my personal "on truck" pump, they both exhibit similar behaviour to a degree. .

Because were running the thing up to very high RPM's we didn't deliberately reduce the supply pressures to cause possible failure or damage. It was a test to determine, among a bunch of other things, supply side variations and/or results from higher supply pressures on the VE.



I've also come to learn that the operating pressure of the VE needs to be corrected a bit... they will run from 4,000 PSI to as much as 10,000 PSI.

I have no physical, test bench, numbers to prove it to you, only info from manual(s) and other experienced persons.



Pastor Bob... .

 

[JLEONARD]

Give you something to do on slow days

Yea, but that would be detrimental to his post count!



Jay

 

[cerberusiam]

Ya know, thats not a half bad idea. A small onboard PLC to monitor the vitals with a Blue Tooth interface for down loading and displaying the current readings is not rocket science. Using a color iPac mounted on velcro to gather and display the readings would be kinda cool. Lets see, PLC with enough memory, probes with a published range of output, small foot print software for the PDU. I have access to the software and I bet the local Radio Shack has the rest of the hard pieces. If BD and a couple of others can do it with multiple gauges it should be doable. I haven't done anything really geeky lately and this has so many useful possibilities. I need to do some research. Film at 11.