5.9L 24V Performance Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps Related To Performance And Longevity

Draw straw install

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Old Apr 22, 2009 | 03:18 PM
  #21  
rivercat's Avatar
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well said dave. I knew you for one were running the 12v pump off the helix 2 cam. Didn't know there were "many" others.

The VPs in my cirlcle are pretty tough.

I had a hard headed friend that I changed oil on his truck one time.
I opened his water valve on the fuel filter housing while it was running and instead of the healthy steam I get on my rig his sucked air cutoff and liked to never re-started.
I pleaded and pleaded with him to change his LP he ran it almost three years like that before he had a board falure VP high idle and dead pedal. Im still on my Virgin VP after 4 years or so of being tapped 30+ psi fp. Matter of fact I added the 7# carter on the rail before I ever tapped my pump wire.
 
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Old Apr 22, 2009 | 03:31 PM
  #22  
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This thread has derailed and went 3 different directions
 
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Old Apr 27, 2009 | 01:04 PM
  #23  
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well, this comes from cummins themselves pressure doesnt kill the VP, whether to hi or too low. its all about the temperature of the fuel which is used to cool and lubricate the VP44, too low of pressure means less fuel, which will cause it to overheat and go out, 99 percent of the time thats the cause, the only reason some say not to run past a certain pressure is because the rubber diaphram inside the pump can burst and then its out. so on a used vp44, say one thats had a lift pump failure, it may have heat cracks in the diaphram which when running too high of pressure, it could rupture. so its a double edged sword. i see no problems running 45 psi as logn as you know for a fact that you havent had an overheated diaphram.
 
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Old Aug 2, 2010 | 08:44 PM
  #24  
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So back to the topic of the OP: Draw Straw I install. I've just finished it and put the tank back in. Upon raising it and tightening just one side of the tank support band/straps, it looks like the top of DS head (the anodized blue part) is almost flush with one of my bed cross-members. Has anyone else noticed this? I'd hate to have anything heavy in the bed putting pressure on the top of the DS. I'll post up a picture in a bit.
 

Last edited by USAFGopherMike; Aug 2, 2010 at 08:50 PM.
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Old Aug 2, 2010 | 11:21 PM
  #25  
00' Quad Cab's Avatar
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IIRC mine has about 2" to anything above it, if I through something in there and hit it it's my own damn fault, not sure why yours is so close.
 
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Old Aug 3, 2010 | 02:09 AM
  #26  
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2 inches? That's strange. I wonder if the dually bed is different as far as the bed spars go. If the cross member under the bed wasn't there, I'd have 2 inches of room too.
 
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Old Aug 3, 2010 | 12:46 PM
  #27  
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On my 02 it is just barely touching. But there is a little bit of movement afforded by the grommet. However I have not had anything heavy in the bed since I did the install so I can't say.

His looks to be a short bed. Yours and mine are both Longbeds.
 
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Old Aug 3, 2010 | 08:59 PM
  #28  
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i have a short bed and mine is just mm from the bed members. maybe his is located in a different place
 

Last edited by crzycummins; Aug 3, 2010 at 09:02 PM.
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Old Aug 3, 2010 | 09:48 PM
  #29  
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Originally Posted by kazairl
On my 02 it is just barely touching. But there is a little bit of movement afforded by the grommet. However I have not had anything heavy in the bed since I did the install so I can't say.

His looks to be a short bed. Yours and mine are both Long beds.

No mine is a long bed, I can crawl back under mine to varify..............
 
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Old Aug 4, 2010 | 12:36 AM
  #30  
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I'm thinking about trimming that cross member with a dremmel. Last thing I want is for that DS to get messed up and have to drop that damn tank again.
 
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