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

fuel system

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Old 11-17-2009, 09:11 AM
91 12valve's Avatar
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Default fuel system
with pump tweaked a little should i need a fuel system before injectors i would like to get at least 80 horse or will i be ok with factory lift pump
 
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Old 11-17-2009, 09:13 AM
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A low pressure piston lift pump seems to be a recommended upgrade. The only real way to know is to get a fuel pressure gauge and keep an eye on it.
 
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Old 11-17-2009, 09:19 AM
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i guess factory my lift pump is in the tank right

---AutoMerged DoublePost---

or would the airdog system be much of a price difference
 
Last edited by 91 12valve; 11-17-2009 at 09:19 AM. Reason: Automerged Doublepost
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Old 11-17-2009, 09:20 AM
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Factory lift pump is on the side of the motor, mechanical like the older gasser motors.

Airdog would be a bit more pricey than the mechanical upgrade but it's a LOT better system.
 
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Old 11-17-2009, 08:06 PM
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thanks for the info i will have to look into a low pressure piston pump
 
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