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

how much boost w/stock turbo

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Old Jul 17, 2011 | 07:43 PM
  #11  
olered's Avatar
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where did you guys get your elbows?
 
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Old Jul 17, 2011 | 08:54 PM
  #12  
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Mine was actually on the truck when I bought it. I would either check with a vender here or eBay. http://item.mobileweb.ebay.com/viewi...d=300444737856
 
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Old Jul 18, 2011 | 12:37 AM
  #13  
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Originally Posted by dieselzimm
just get a boost elbow they are only 20 bucks or so
thanks bud $20 ill roll up some quarters an get one.need a cheep fix on my everything replaced & cleaned over heating while towing my 5th problem!

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thanks 20$ Ill roll up sum quarters n get one.need a cheep fix for my overheating while towing everything replaced & cleaned problem that is keepin me from leavin las vegas 4 fun!
 

Last edited by vegascbm; Jul 18, 2011 at 12:37 AM. Reason: Automerged Doublepost
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Old Jul 18, 2011 | 04:24 PM
  #14  
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The most i have seen on a stock 12 valve turbo is 42 psi, and the head gasket blew within a month. At that much boost, as stated above, it does more harm than good.
 
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Old Jul 19, 2011 | 06:15 AM
  #15  
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thanks matt, im going to get a boost elbo or make one.larger head studs&o-ringed head would be needed to handle more than 35 psi boost correct ?just lerning here thanks again.
 
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Old Jul 19, 2011 | 01:23 PM
  #16  
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I would say 35 psi is a safe efficient number for stock turbo, gasket, and studs. I have definitely seen people get away with much more than that though...
 
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Old Jul 21, 2011 | 04:30 PM
  #17  
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Originally Posted by vegascbm
thanks matt, im going to get a boost elbo or make one.larger head studs&o-ringed head would be needed to handle more than 35 psi boost correct ?just lerning here thanks again.
i was running 38 w bolts and no fuel plate and no problems pm me if u want info
 
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Old Jul 24, 2011 | 05:39 PM
  #18  
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well i got guages opperating except for trans ,need a t - fitting . i had rad emty to put in new stat but wanted to check guagaes . i filled it 3/4 test drove for readings . i got 30 boost wot no load 1200deg. egt in 1/4 mi ,at idle 280 or 380 i forgot. well i also got foam in rad bad head gasget i supose.coolant settled out dark brown to light br to green coolant.funny thing is w/ rad full i get no foam.any body know a good place in vegas for serfacing,o-ring install,valve seat &core crack check ?whats a good head gasget to use& studs.any dirrections or tips for removal and install ? thanksn have a nice day carl
 
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Old Jul 25, 2011 | 11:31 AM
  #19  
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i hit about 30 in the 2 1998s i drive and about 38 in my 93 with hx35
 
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Old Nov 15, 2012 | 08:35 AM
  #20  
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i have been trying to figure out how much more boost a hx-40 witha big head waste gate will produce compared to the lasts one, and is there any way t adjusts the waste gate instead of just simply blocking it off?
 
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