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

12V vacuum location?

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Old 06-27-2009, 02:21 PM
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Default 12V vacuum location?

Well I just got in my new Autometer pillar set and they are NICE! I was wondering if anyone had a good location to pull vacuum from. I tried up top to the diaphram on the inside drivers fender and nothing. Since this thing isn't full of vacuum lines like my old gassers I'm a little confused about where to get the best signal. I have a 60 PSI gauge; what should I be getting when I mash it anyways; 20? Since we are on the subject I will need to install the pyrometer as well and there is some discussion about the best place for that as well. As usual, any input is appreciated.
 
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Old 06-27-2009, 07:33 PM
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Why are you measuring Vacume?

Are you talking about turbo boost?


Boost:

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Pyrometer (Pre-turbo is much better than post-turbo):

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Last edited by Dr. Evil; 06-27-2009 at 08:30 PM.
  #3  
Old 06-27-2009, 08:19 PM
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I'm with doc, there is no vacuum on a diesel engine as there is no restriction in the intake. There is however a vacuum pump on the engine that supplies vacuum for the brake booster , cab vents, 4x4 actuator, and cruise control, but this does not need to be monitored.
 
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Old 06-30-2009, 12:10 AM
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My 95 has no vacum pump it pulls the vacum off the side of the block just below the fuel pump so to say a diesel has no vaccum is crap all engines create vaccum somehwere the only time you would need to measure vaccum is if you have a vaccum opperated exhaust break. And that is only so you can make sure there is enough vaccum to operate it
 
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Old 06-30-2009, 12:11 AM
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that is the vacuum pump
 
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Old 06-30-2009, 03:07 AM
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Yeah if you're calling the whole engine a vaccum pump I suppose it is but unlike the 24valve motors there is no electric vaccum pump on the engine
 
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