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1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

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I have read the sticky on what Cummins part numbers and the procedure to change out the factory 1st gen lift pump, but are there other solutions? I was thinking a low pressure electric pump or an electric pump with a regulator. If this is ... JOIN NOW TO REMOVE TRACER

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Old 03-29-2011, 10:20 PM
89_torquer's Avatar
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Default Lift pump upgrade

I have read the sticky on what Cummins part numbers and the procedure to change out the factory 1st gen lift pump, but are there other solutions?

I was thinking a low pressure electric pump or an electric pump with a regulator. If this is a valid approach, does anyone know the flow rate needed to support something lets say 300 to 350hp? 110gph or higher?

Thanks for any help.
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Old 03-31-2011, 12:38 AM
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Alot of guys run Holley blue or black (or similar). The blue I ran would run 12psi at idle.

chromehound's Sig:Colorado Diesel Truck Club
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Old 03-31-2011, 03:12 PM
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Is there any advantages/disadvantages with going to something like the Holley blue pump?

Can you use this style gasoline pump with diesel?

Last edited by 89_torquer; 03-31-2011 at 03:17 PM..
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Old 03-31-2011, 06:11 PM
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My friend that worked for cummins said 13 psi.

1989w250's Sig:91 cummins 6 inch lift on 35s, 4 inch turbo back to 6 inch stack, Denny t stage 2 and ddp rebuilt the ve pump and dyno tuned er
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Old 03-31-2011, 06:21 PM
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I ran a blue for 9 months before I sold the truck, 1 buddy has been running one for over a year and another has run a Speedyway version for a long time.

The blues are fine but the others may need to be regulated so as not to mess things up, I think its anything over 15 or 17psi is hard on seals so if your electric pump is below that your good unregulated.
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Old 03-31-2011, 07:31 PM
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That seems like a more cost effective option than upgrading to the cummins mechanical version in the sticky.
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