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

Fixing the 12 Valve

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  #11  
Old 09-21-2014, 07:14 PM
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Wow I get on a good day 18 if I'm lucky, 16 if I let her have it
 
  #12  
Old 09-21-2014, 11:21 PM
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I had 4.10 and 265 tires , I was getting 18-20 all day ..

I now have 3.55's . should get 23-25 on the freeway ..

As far as your power .. a stock set of 215 injectors and your stock pump with 191 DV's would be a great combo .. Factory timing needs to be re-set to 16*-18*.... then is will run great ..

Also get your fuel pressure up there .. bout 26-30 PSI minimum ..

Keep usposted ..
 

Last edited by 4x4manonbroke; 09-22-2014 at 12:02 AM.
  #13  
Old 09-21-2014, 11:46 PM
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As for your fuel plate, i really recomend you get a #10 plate, i have one, it's a nice moderate plate. A
#100 plate is a really agressive plate. A 4000 springs is really not needed for what you what, i'd go with a 3000 spring set, i have that on mine.
And a pyro gauge is recomended if you don't have one installed yet.
 
  #14  
Old 09-22-2014, 12:03 AM
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Well he's gonna wanna haul A$$ .. so 4K is gonna get ya there, also if you do go 4K's .. make sure your fuel pressure is closer to the 30-32 psi .. other wise on the top it will get to low ...
 
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Old 09-22-2014, 12:25 AM
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With mods like your's what am I looking at in terms of reliability. Last year there was only one day my truck wouldn't start and that was -35 and it wasn't plugged in. ( I lived at the dorms my first year at college) Now I have an apartment with a plug in.

I am just trying to make affordable power, nothing too crazy. I don't want to buy cheap crap that will break itself, or the truck.

Going with a 4K set up will I have to get a aftermarket fuel pump like a fass or something of the sort to minimize the risk of killing the regular stock pump?

I will be adding a fuel pressure gauge, and pryo. I'll be putting them in where the pull out cup holders used to be and replace the cup holders with one from Geno's
 
  #16  
Old 09-22-2014, 12:49 AM
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You can run 4K with stock LP, You will need to restrict the return line though .. and adjustabel OFV will make wonders happen, I recently did Mine and it runs awesome !!!

Larryb - LarryB's Dodge Diesel, 94-98, Fuel Pressure Adjustment Kit

the above link is what i installed .. my Fuel pressure before was about 15 psi .. now after its 30psi .. WHAT A HUGE DIFFERENCE !!!!!!

I can bump the key and it fires up when cold ( 40*) .. not an issue, it will do better cold I'm sure !!
 
  #17  
Old 09-22-2014, 01:35 AM
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I want to do something like this, but using abs plastic, to make it look more stock
 
  #18  
Old 09-22-2014, 10:57 AM
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Thanks for that link, it kills two birds with one stone
 
  #19  
Old 09-22-2014, 12:26 PM
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.. Where is the pic ?
 
  #20  
Old 09-22-2014, 12:30 PM
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