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

12v Turbo Maxing At 17PSI

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Old Jan 24, 2008 | 11:10 PM
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Default 12v Turbo Maxing At 17PSI

i have maxed my fuel plate and maxed my star wheel but turbo is maxing at 17PSI anyone to help would be greatly apriciated
 

Last edited by 94cummins12v; Jan 24, 2008 at 11:12 PM.
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Old Jan 24, 2008 | 11:29 PM
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stock thats about where the wastegate is set, you need a boost elbow to get any more out of it
 
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Old Jan 24, 2008 | 11:33 PM
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if i order my #5 fuel plate like i was planning will it come with an elbow and does the elbow go infront of the wastegate or were can i get an elbow
 
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Old Jan 24, 2008 | 11:41 PM
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depends where you get it from, on some of the trucks it goes right on the compressor housing and on others it goes right off the afc housing
 
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Old Jan 25, 2008 | 01:02 AM
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like right were it hooks right into the the neck then were do you conect it from there
 
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Old Jan 25, 2008 | 06:09 AM
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if you have one coming off the compressor housing, a boost line that is, it will be on about the 5 o clock position on the turbo if your looking at the front of it, it will be a little brass 90 degree elbow, if not it will be on the back of the afc housing
 
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Old Jan 25, 2008 | 01:18 PM
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there is no elbopw on the turbo at on the back of the AFC it is a tee fitting
 
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Old Jan 25, 2008 | 03:39 PM
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you will have one of two on your truck either a barbed brass elbow on the front of the compessor housing, or a straight brass barb in a "T" off the back of the AFC housing next to the boost line that goes to the intake manifold.

The boost elbow replaces which ever you have and limits the boost to the waste gate. It should come with most plates that you buy, or most shops will sell them for about $15(TST, PDR, Source Automotive, ect...)

Here is the instuctions for the TST plate it has little diagrams that will show you where it goes, figure 2 is compressor, figure 3 is AFC. http://www.tstproducts.com/pdffiles/INSRUCT98.pdf

....Josh
 

Last edited by NMCUMMINS; Jan 25, 2008 at 03:41 PM.
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Old Jan 25, 2008 | 03:53 PM
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so if i put ithe elbow in my compressor housing at the bottom like the picture do i just conect that hose to the wastegate and fully remove the one from the AFC to the wastegate
 
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Old Jan 25, 2008 | 04:05 PM
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you can either swap the straight barb for the elbow.

or drill and tap your compressor housing, install the elbow, run a rubber line from the elbow to the waste gate, then pull the metal line and straight barb off and install a plug where the barb was.
 
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