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24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps
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What pressurefor my Raptor FRRP?

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Old Dec 13, 2015 | 11:33 AM
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noserider's Avatar
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Default What pressure for my Raptor FRRP?
I installed a Raptor FRRP on my 2002 Cummins 5.9 ISB. It's in a 38' diesel pusher motorhome. Idle pressure out of the box is 15 PSI. WOT is 10-11 PSI, cruise is 12-13 PSI. Should I turn it up a tad? Looking for what pressure is optimal for power and cooling of the VP44.
 
Last edited by noserider; Dec 13, 2015 at 12:00 PM. Reason: typo
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Old Dec 14, 2015 | 05:18 AM
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I would turn it up. Bosch specs the pump at a minimum of 10psi. I wouldn't run less than 15 at WOT.
 
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Old Dec 14, 2015 | 09:55 AM
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Turn it up 2-3psi and get a big line kit to get rid of the banjo bolts that are so restrictive.
 
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