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

How fast should it go

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  #21  
Old 03-31-2009, 09:12 PM
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well the reason i cant do it fast is if i give it full throttle, the tturbo spools up to fast and will over boost, it hits 40psi pretty fast. I don't want to pop a head gasket so i keep it @30-35psi of boost which means i can only hit about 3/4throttle at the high end. so maybe a waste gate adjutment? what do you think?
 
  #22  
Old 03-31-2009, 09:14 PM
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392hemix with the 4k spring I would bump the timing to atleast 15.5 -16.5 thats with stock injectors it will pull harder and run over 2800 happier and stay cooler you should be able to do triple digits easy just wouldnt stay there to long because of temps also your turbo is hatin life and bein way overspooled
 

Last edited by diesel_tallent88; 03-31-2009 at 09:16 PM. Reason: add
  #23  
Old 03-31-2009, 09:15 PM
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Yes
 
  #24  
Old 03-31-2009, 09:25 PM
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Ya i understand that the turbo is over spooling, i am going to get injectors as soon as i get a Job. I have not yet had the confadence to time my truck by myself, plus i don't have the propper tools or money. I am just going to try adjusting the waste gate, and staying off the skinny pedal.
 
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Old 03-31-2009, 09:28 PM
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sounds good
 
  #26  
Old 04-01-2009, 01:46 AM
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Originally Posted by BAD *** 1997 RAM 2500
I'VE ALWAYS HEARD THAT THE CASE AND DIFF'S COULD TAKE A 20% OR 30% DIFFERENCE IN RATIO,BUT PROBABLY NOT A GOOD IDEA
Well thats good to know i will jack it up and count the revolutions on the drive shaft to see what i get
 
  #27  
Old 04-01-2009, 06:40 AM
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NiceGlad to hear you got up and over the 100 mph mark. Now once you throw in some injectors and a turbo wouldn't hurt either you should be able to run as fast as you really need to But how fast is fast enough
 
  #28  
Old 04-01-2009, 09:54 AM
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my stocker was hitting 46

past 35 all the stocker will make is heat. MY current setup hits 49psi ad thats at 17.5 dgress of timing. I really need to update my sig.
 
  #29  
Old 04-01-2009, 11:30 AM
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Originally Posted by 392hemix
Ya i understand that the turbo is over spooling, i am going to get injectors as soon as i get a Job. I have not yet had the confadence to time my truck by myself, plus i don't have the propper tools or money. I am just going to try adjusting the waste gate, and staying off the skinny pedal.
do you still have the stock housing? and if so have you drilled it out so it vents all 6 cylinders cuz if you havent its only venting the back three

Originally Posted by xzaq103
my stocker was hitting 46

past 35 all the stocker will make is heat. MY current setup hits 49psi ad thats at 17.5 dgress of timing. I really need to update my sig.
me too I'm at 15.5* and 55 + psi but thats not a stock turbo
 
  #30  
Old 04-01-2009, 11:36 AM
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shes stock, look @ my sig. I would like to drill the housing but i am prolly just gonna by a phat shaft turbo, something that can take abuse but is inexpensive, I don't need anymore than 500hp or @least till i get something else that i can drive and not worry about.
 


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