Lift + Pusher Pumps= what #'s

[Rob Thomas]

Allright,



Just got the fuel gauge installed,had the pusher pump on last week,now what kinda poundage should I be seein'? I think my pressures are low, but I'm not gonna' tell ya' what they are ,just yet. :-laf



Thanks, Rob





Edit, Mechanical gauge,from the injector pump.

 

[Mark_Kendrick]

I think you're a little low on grey matter!!!

 

[Whitmore]

Ramthisone

Looks like you psi is running a tad lower than mine

 

[Rob Thomas]

That ain't helpin' very much!



I think my liftpump may be goin',bye bye



Rob

 

[Whitmore]

Sorry guy,

I'm just funnin with ya, I dont have a pusher so I cant help ya ... ... ... ... ... Kevin

 

[Rob Thomas]

Doh!!!!

 

[EricBu12]

Good normal with pusher



Idle 13-16



cruise 10-12



WOT 8-10 or more

 

[Rob Thomas]

Thanks Eric,



Thats what mine are, I thought I heard guys gettin' 22#, I was startin' to get worried.



Rob

 

[Snow man]

I get 17-19 at idle,10-12 cruising,and 3-4 WOT with comp on level5.

 

[DAWG-1]

Originally posted by EricBu12

Good normal with pusher



Idle 13-16



cruise 10-12



WOT 8-10 or more

My numbers must be great. Idle 22#. Cruise 20-22#. WOT 17#. Sam

 

[Shooter]

With sick lift pump & pusher

Idle 18

cruise 18

wot 18



With pusher pushing through dead lift pump

idle 18

cruise 17

wot 11



New lift pump due to arrive 4-8

 

[Rob Thomas]

Well then, if thats the case, my lift pump may be all done!

Better get it to the dreaded stealer,



Rob

 

[Lsfarm]

Fuel pressure

Rob, I'm getting 17# at idle, 15# regular driving, and 14-15# at WOT with everything turned up. I have a sick lift pump fed by a new pusher pump.



You should have at least 15-17# at idle and at least 12-14# at WOT. Try running each pump separate and see what the individual pressures are.



greg.

 

[Rob Thomas]

Greg,



I took my truck for a rip this morning,I'm only gettin' 5#'s @ WOT ,and at best 15#'s @ idle, 10-11 #'s cruisin' with both pumps. Thats with just the EZ and DDIII's,didn't even bother to use the COMP!:--)



Rob

 

[Rob Thomas]

Okie-dokie,



So I unpluded the pusher pump,fired it up and got a whopping... ... ... ... ... 5#'s @ idle!, definatly goin' to the wonderful dealer Monday morning.





I wana use my Comp, I wana use my Comp,:{ :{ :{







Later, Rob

 

[Diesel Freak]

I still see no reason to exceed 14 PSI at the VP44. If you think the extra fuel pressure is helping anything... you are mistaken. All the extra pressure is doing is popping the internal relief..... the relief is there to RELIEVE pressure and not as a regulator... eventually it will wear out! If you think the extra fuel pressure is helping cool and lubricate the VP44, you are also mistaken. All that extra fuel is bypassing the rotating assembly and going back to the tank. The extra inlet pressure to the VP44 will not force its way through the internal feed pump! If you are worried about VP44 Cavitation, then all you have to do is keep fuel pressure above 1PSI Gauge, and even if fuel temperature is at 300F it will not flash to a vapor inside the VP44!



#2 Diesel is made up of C-9 to C-20 carbon molecuels which vary in boiling point from 325F to 675F. Vapor Pressure for #2 diesel is 1mmHg at 70F... this means that for Diesel to boil at 70F pressure would have to drop to less than . 0193 PSI absolute, or -14. 681 PSI Gauge.

 

[EricBu12]

I thought that was the case, I have the #'s I stated at the top and it never changes from that I do have a couple of other things that might be making it go lower pressure but as long as the WOT is around 8 psi I am happy. I runn 13 psi at idle so I never pop off the releif valve (i guess... . ) So good thing I have a push pump and a filter to keep them clean. the stock filter will last at least twice as long now.