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

Truck with a few mods.....not so fast??

Old Nov 23, 2011 | 07:20 PM
  #21  
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it wont do that till you weld the rear end or put in a locker. you can sure melt 1 tire off and look cool. hahaha
 
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Old Nov 23, 2011 | 07:23 PM
  #22  
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Originally Posted by turbo2332
it wont do that till you weld the rear end or put in a locker. you can sure melt 1 tire off and look cool. hahaha
My Spicer 70 does really well off road, but I don't even get one tire fire right off the line. No chirp or anything. I don't think I have to worry about a locker since it doesn't even spin one right now
 
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Old Nov 23, 2011 | 07:43 PM
  #23  
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you will
 
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Old Nov 23, 2011 | 08:43 PM
  #24  
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if i floor it from a stop.... when the boost builds (about 5mph) the rears spin the 4k is by far the best bang for the buck. and there easy to install.

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its not suprising u arnt seeing any performance out of a truck that wont spin over 2200 rpm
 

Last edited by monster12valve; Nov 23, 2011 at 08:43 PM. Reason: Automerged Doublepost
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Old Nov 23, 2011 | 09:57 PM
  #25  
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i know right.. your shuttin down where my power has just begun!!!

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i ordered 3gsk, but mine loves goin to 4k , idk why with my 3s it goes to 4, possibly sent wrong kit maybe??
 

Last edited by xX_CuMMiNs_Xx; Nov 23, 2011 at 09:57 PM. Reason: Automerged Doublepost
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Old Nov 23, 2011 | 10:15 PM
  #26  
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4k has an extra spring that goes inside of the one dont rev over 3200 w/o valve springs also
 
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Old Nov 23, 2011 | 10:24 PM
  #27  
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ive got 60lb valve springs
 
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Old Nov 23, 2011 | 11:07 PM
  #28  
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Yeah, I'm surprised that the guy that owned the truck before me had some of the things done without upgrading the governor springs at all. And yeah, it is straight gutless after like 2100-2200. I'm hoping that the spring install will wake this truck up quite a bit especially since I already have most of the basic stuff done. I was suprised at how small the gsk was when I took the springs out of the box. They just look way bigger in the product pics
 
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Old Nov 23, 2011 | 11:38 PM
  #29  
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Originally Posted by turbo2332
there are 160, 175, 180 and 215 pumps. 180 are the most sought after. manual trucks came with bigger pumps. you should have the 180 pump unless its a super early 96 or late 95
its a 96 made in 11/95
 
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Old Nov 28, 2011 | 02:59 PM
  #30  
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Holy Hell!!! I just installed the 4K GSK and just WOW!!! It is an entirely new truck. You guys were right. I put on a new OFV as well since it was old as dirt and looked like it had seen better days when I stretched the spring.

Now the truck feels like I hoped it did all along. Taking the old springs out was a little strange. The nuts didn't even have a solid click on them. I literally backed them off by hand. Zero pressure on the springs or the retaining nuts. No wonder I was getting nothing for fuel especially up top. I don't think anyone had been in there before though. The tamper proof safety wire was still installed over the plug and back around the pump......

Anyways, I am glad my truck finally pulls like it should. Now I just have to get a new boost gauge cause the 30psi isspro I have now just doesn't cut it. I hit 30psi without even going full throttle now whereas before it would hit 25psi only under full load ad WOT on the freeway.

Anyways, thanks guys for the advice
 
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