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

power guesses

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  #21  
Old 01-08-2014, 02:21 PM
94 12valve's Avatar
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IMO its best to take the turbo off to drill it. This way you know you got all the shavings out from the hole you just dirlled. The wastgate is a pretty simple thing to adjust its a rod connected to an air diaphram with a spring in it. for more boost tighten up on the rod for less loosen.

You could also invest in a boost elbow, this pinches off the boost signal allowing more boost to be built. its adjustable and pretty cheap.
 
  #22  
Old 01-08-2014, 05:52 PM
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Thanks every one for ur input and thanks Irzyk for posting, truck has studs, its an auto, and im not sure what the timings at, haven't had a whole lot of time to check the truck out b4 the snow flew, it in storage now. if any one has anymore input, my short term goal is 5oohp, any suggestions?
 

Last edited by raceboy204; 01-08-2014 at 05:59 PM.
  #23  
Old 01-18-2014, 08:48 PM
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Hey! Welcome to the site, BTW!
 
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  #24  
Old 02-01-2014, 02:49 PM
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Hey jkidd and 94 12valve. I finally got around to adjusting my wastegate and I'm kinda stumped I lossened the rod on the actuator and nailed it the first time, I'm now hitting 35-37 psi at wot witch is what I want but the wastegate is creeping open and it doesn't spool nearly as fast as I would like ( kinda the reason for getting a hx40/35 hybrid) I'm just wondering if you can get a blow off valve or something so the wastegate will open at around 35 psi other than creeping open all the way from 5 psi.
 
  #25  
Old 02-01-2014, 05:49 PM
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unfortunately for you this happens when you ask so much from a small factory turbo. you have a waste-gate spring that is designed to hold back maybe 20-25PSI of drive pressure before it is overcome. now that your truck is making twice the HP it did stock it is making way more drive pressure then it was designed to hold back and you are seeing some creep. you can install a larger waste-gate actuator to help or a spring gate.
 
  #26  
Old 02-01-2014, 10:32 PM
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sounds like you may have opened it too far. Do you have the adjustable boost elbow?
 
  #27  
Old 02-02-2014, 09:22 AM
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why did you loosen the actuator rod?
 

Last edited by 94 12valve; 02-02-2014 at 09:31 AM.
  #28  
Old 02-02-2014, 07:25 PM
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I loosened the actuator arm because the wastegate was never opening but I found out the guy who had it before me put a fitting in between the elbow and the turbo that plugged the line, so I took that off and that's we're I'm at. Thinking about just plugging it back up for now because the lag is rediculous, I'll try tighting the arm back up before I decide tho, and thanks turbo 2332. Maybe I'll just blow this one up and get a new one. any suggestions? Lol

---AutoMerged DoublePost---

And no I don't have a boost elbow
 

Last edited by Irzyk; 02-02-2014 at 07:25 PM. Reason: Automerged Doublepost
  #29  
Old 02-02-2014, 08:52 PM
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Any guesses on power!BHAF,4in to 5in straight pipe,aFe intake manifold,#100 slide forward and afc,40hp injectors on the way this week?
 
  #30  
Old 02-03-2014, 04:48 PM
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Tighten the rod back up to where it was stock and invest in a boost elbow
 
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