5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

Raptor Fuel Pump

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Old Feb 3, 2011 | 05:31 AM
  #11  
captain_stabbin's Avatar
Diesel Wrench
Joined: Aug 2009
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From: houston, tx
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Originally Posted by Drothgeb
I used to have confidence in the stock pump, until I installed a fuel pressure gauge. Seeing it drop to single digits on a new pump was enough for me to switch to a Raptor.
it shouldn't be dropping that low
 
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Old Feb 3, 2011 | 07:16 AM
  #12  
Billy D's Avatar
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From: Ohio
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I love my Raptor Need one fer Goldie
 
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Old Feb 3, 2011 | 08:04 AM
  #13  
deerefanatic's Avatar
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From: Colon, MI
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yah, you can pull a stocker way down. Course, his overflow valve may be shot too. My OFV was new and I could still pull it down to about 14 psi with my little stocker 175hp injectors.

Them stockers are a joke. Pure and simple. It took me a long time to actually become convinced of that, but now I've learned my lesson.
 
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Old Feb 4, 2011 | 04:11 PM
  #14  
Drothgeb's Avatar
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From: Maryland
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Originally Posted by deerefanatic
yah, you can pull a stocker way down. Course, his overflow valve may be shot too. My OFV was new and I could still pull it down to about 14 psi with my little stocker 175hp injectors.

Them stockers are a joke. Pure and simple. It took me a long time to actually become convinced of that, but now I've learned my lesson.
I had brand new fuel lines, filter, cummins lift pump and adjustable OFV set at 32psi. At 2000rpm I'd have 32psi. At WOT w/181s it would drop to 10-12psi. After the switch to 024s, it would drop to 7psi.
 
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