12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

max boost 27ish?

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  #11  
Old 07-07-2009, 10:18 PM
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It depends is the elbow on the pump or the turbo on what you set it at if its on the turbo all the way in on the pump all the way out
 
  #12  
Old 07-07-2009, 10:46 PM
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no i have it the right way its behind my pump. So how does it work with adding fuel and egts? how much fuel you feed it the more boost you get? so how do you know how much fuel you can add before you cant keep the egts down?
 
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Old 07-08-2009, 03:23 PM
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that is not true,to turn the boost down you have to decrease the signal to the wastegate,which mean lessening the pressure.when you screw a valve in you are restricting the flow!
 
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Old 07-08-2009, 03:35 PM
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Restricting the flow to the wastegate increases boost increasing the flow decrases boost
 
  #15  
Old 07-08-2009, 03:38 PM
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exactly you told him that if he screwed it in he was turning the boost down.
 
  #16  
Old 07-08-2009, 03:54 PM
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so turning the screw all the way IN on the boost elbow from the back of the AFC housing would INCRESE boost right?? and OUT would DECRESE boost right?? i have a #8 plate in my 94 afc housing forward plate forward starwheel cranked and smoke screw adjusted to my liking also have a BHAF but im running stock exhaust and with the boost elbow and wastegate not capped off i get a steady 18-20 PSI of boost under big load if i cap it off i get roughly 26-28 PSI under load i know i am getting plenty of fuel i can see it come out of my tail pipe

also i have the same boost elbow as him and i have it screwed all the way in still nothing it made no difference than having the stock str8 barbed piece out of the AFC

sorry to jack a thread

any idea's?
 
  #17  
Old 07-08-2009, 04:04 PM
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when i put it on and loosend it i got like 20 psi tighten it all the way get the 27ish psi
 
  #18  
Old 07-08-2009, 04:08 PM
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and that's the way it should be.out is less boost,in is more boost.
 
  #19  
Old 07-08-2009, 05:02 PM
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on the boost elbow there is a tiny hole like it supose to be there wats that for? can i plug it?
 
  #20  
Old 07-08-2009, 06:01 PM
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That tiny hole bleeds boost pressure away from the turbo wastegate diaghram to keep it from dumping and allowing more boost. This is mechanical boost fooler.
 


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