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

Waste Gate Question

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Old Mar 24, 2009 | 04:55 PM
  #21  
kazairl's Avatar
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Correct. Though for safetys sake I would install your little boost elbow you say you have and limit your boost pressure to no more than 35 psi.

Reasons being

#1 An hx-35 isn't efficient at all above about 30 PSI. It creates more heat above that range which is hard on your engine EGTS

#2 A hx 35 is on borrowed time in that range. It wasn't built to hand that high of boost pressures and it will wipe out the thrust bearing in a relatively short period of time.

#3 Because at the higher pressures and RPMs the Hx-35 becomes restrictive on the exhaust side. You waste horse power due to excessive drive pressure because the exhaust housing can't handle the air flow. Setting the wastegate will help bring drive pressures down becaus you will be bypassing the exhaust housing.
 
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Old Mar 24, 2009 | 11:43 PM
  #22  
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oh hell you aint having fun till you blow crap up
 
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Old Mar 25, 2009 | 07:07 AM
  #23  
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i have mine completly plugged of and max is about 27psi what the hell is up?
 
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Old Mar 25, 2009 | 08:16 AM
  #24  
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Originally Posted by BAD *** 1997 RAM 2500
i have mine completly plugged of and max is about 27psi what the hell is up?

You need to fill out yer signature with details on yer truck so we can help diagnose issues

sounds like to me you need more fuel if ya wanna get more boost, if ya can get the HX35 up past 32 PSI then ya will be around 100k rpm with the waste gate plugged and ya can gernade it then ya can go ahead and get a bigger turbo
 
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Old Mar 25, 2009 | 10:28 AM
  #25  
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SORRY I DON'T KNOW WHY IT DID'NT SHOW MY SIGNATURE.SURELY WITH MY SET UP FUEL AINT THE PROB.
 
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Old Mar 25, 2009 | 10:52 AM
  #26  
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you need to do a pressure check on yer system, I think you have some leaks

I went in and edited yer first post on each page so yer sig would show.................it only shows up once per page
 
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Old Mar 25, 2009 | 11:00 AM
  #27  
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to answer yer next question ....Yes here it is

https://www.dieselbombers.com/cummin...tructions.html
 
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Old Mar 25, 2009 | 11:01 AM
  #28  
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HOW DO I DO A PRESSURE CHECK?
 
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Old Mar 25, 2009 | 11:06 AM
  #29  
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Originally Posted by Whitmore
to answer yer next question ....Yes here it is

https://www.dieselbombers.com/cummin...tructions.html
Originally Posted by BAD *** 1997 RAM 2500
HOW DO I DO A PRESSURE CHECK?

.............I answered before ya asked
 
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Old Mar 25, 2009 | 12:04 PM
  #30  
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THANKS ALOT MAN.
 
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