holley blue pump - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 11 (permalink) Old 01-30-2009, 07:27 PM Thread Starter
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holley blue pump

how to get more fuel pressure and how to put 1/2 fuel line in the tank
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post #2 of 11 (permalink) Old 01-30-2009, 08:22 PM
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You're only going to get the the pressure that the pump your using puts out. I don't think you can turn them up. Besides, you can't run high pressure with the VP-44. With an airdog 100, I'm getting 14-15 psi.
As for the draw straw, here is a Vulcan one. I haven't tried it, but it looks promising.

http://www.vulcanperformance.com/Dra...hlo-p/dsiv.htm

This has the draw straw and return all in one unit.

Hope this helps,
Travis

2004 Silverado 2500 LLY Duramax
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post #3 of 11 (permalink) Old 01-30-2009, 08:34 PM Thread Starter
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some one said you can strech the spring in them i just want to make sure of that before i do it
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post #4 of 11 (permalink) Old 01-30-2009, 11:53 PM
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I'm not really sure about that one, what fuel pressure are you running?

2004 Silverado 2500 LLY Duramax
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post #5 of 11 (permalink) Old 01-31-2009, 07:10 AM
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you can stretch the spring, just be careful when you do it. The spring mine came with was WAY to soft, and would only put out around 7 psi...I was testing with my in cab FP gauge as well as one hooked to the test port, so I knew I was accurate. I ended up using a spring from a click pen, and cutting a few prongs from it and stretching it a bit to get the proper fuel pressure. I currently have 17.5 at idle and about 12.5 at WOT.

My truck wants to be a semi when it grows up...
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post #6 of 11 (permalink) Old 01-31-2009, 01:46 PM
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Holley pumps are a cheap way of getting a pump... But like you see in the above post...

Quote:
I currently have 17.5 at idle and about 12.5 at WOT.
When you you have pressure loss that means that you pump can't supply enough volume of fuel for the demand. So the whole trick is to find a pump that can satisify the demand... Something to think about...

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #7 of 11 (permalink) Old 01-31-2009, 07:24 PM
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When you you have pressure loss that means that you pump can't supply enough volume of fuel for the demand. So the whole trick is to find a pump that can satisify the demand... Something to think about...[/QUOTE]


Yea, I know exactly what you are saying...I guess in my situation, where $ was a factor, I simply wanted something more reliable than stock, but couldnt exactly spend $500 on a pump, ya know. My gauge for normal driving sits at 17.5 idle and runs at a steady 15 no matter what. Its only if I absolutly romp on it from a dead stop will it drop to 12.5 or so. Isn't it normal to see a bit of a pressure drop under heavy acceleration? I was under the impression that 17.5 - a steady 15 was a very healthy system...Thanks for the help!

My truck wants to be a semi when it grows up...
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post #8 of 11 (permalink) Old 01-31-2009, 08:50 PM Thread Starter
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i do not have any pressure problems i just would like to up the pressure a little thats have had no problems with the holley pump maybe you have
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post #9 of 11 (permalink) Old 02-01-2009, 01:38 AM
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Quote:
Originally Posted by Jeffybuilt View Post
When you you have pressure loss that means that you pump can't supply enough volume of fuel for the demand. So the whole trick is to find a pump that can satisify the demand... Something to think about...

Yea, I know exactly what you are saying...I guess in my situation, where $ was a factor, I simply wanted something more reliable than stock, but couldnt exactly spend $500 on a pump, ya know. My gauge for normal driving sits at 17.5 idle and runs at a steady 15 no matter what. Its only if I absolutly romp on it from a dead stop will it drop to 12.5 or so. Isn't it normal to see a bit of a pressure drop under heavy acceleration? I was under the impression that 17.5 - a steady 15 was a very healthy system...Thanks for the help!
[/quote]

Basically is all about supply and demand... Like you see a 5 PSI drop in fuel pressure and I only see 1 PSI in the same conditions... Just that a AD or FASS can supply more volume constantly than a Holley...

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #10 of 11 (permalink) Old 02-01-2009, 02:34 AM
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i ran two pumps on my 02 one being a holley. With the two i didnt have but 2psi drop but also i had about the same money in it as i would have a fass, airdog etc....
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