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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  #11  
Old 03-30-2009, 09:33 PM
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100+ with the trailer on.
 
  #12  
Old 03-30-2009, 09:37 PM
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That must be nice. I hope your probe is in the right spot, a lot of people around here do it after turbo because the probe might break off and mess up youre turbo but i just tell them thats not a good idea because its not a true reading it can be off by as much as 400 degrees and I have never heard of that problem with the probe breaking off. I dont know what to say to that.
 
  #13  
Old 03-30-2009, 09:43 PM
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What rpm are u at goin 95?
 
  #14  
Old 03-30-2009, 10:06 PM
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I Have it pre turbo 2" from the turbo flange and 5/8 from the center. closer to cab. it is in the correct spot. i wanted it to be spot on because i don't want to burn out a piston. I would rather the probe break off and destroy the turbo then burn up my engine. the truck is @ 2800 rpm @95mph maybe 2900 but it never has hit 3000rpm out of over drive.
 
  #15  
Old 03-30-2009, 10:29 PM
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I would say im at about 2900 Rpm at 95. To tell you the truth i wasnt paying attention to my tack when i hit 110 i was racing some damn intrepid or something like that i was just trying to get past them because we were on a highway and were coming up to a hill.

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At least the tag on my truck says 4.10 gears, but the rear diff has been opened up before, they left a nice coating of silicone to see. My truck might have different rear gears which would be retarded to change the rear end gears and not the front but stranger things have happened. Because when im in 4WD I can drift the back end pretty easily in the snow, it seems to break loose before the front tires will. Does anyone else have that problem in 4wd?
 

Last edited by collinscummins; 03-30-2009 at 10:29 PM. Reason: Automerged Doublepost
  #16  
Old 03-30-2009, 10:40 PM
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I would guess that if you had diff gears in the rear then the front you would blow your transfer case in less than a mile. even if it was a tooth off. so if you use it and it doesnt blow your prob ok. Post a new thread about it.

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Originally Posted by Jazz
I can reach 100 in my dually with 4:10's pretty easy. So I don't see any problem in you getting there. Maybe your under valved
I dont go on the 24valve threads and make fun of the vp44 ***** pumps LOL 12valves of fury baby!
 

Last edited by 392hemix; 03-30-2009 at 10:40 PM. Reason: Automerged Doublepost
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  #17  
Old 03-31-2009, 01:16 AM
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Originally Posted by 392hemix
I would guess that if you had diff gears in the rear then the front you would blow your transfer case in less than a mile. even if it was a tooth off. so if you use it and it doesnt blow your prob ok. Post a new thread about it.

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I dont go on the 24valve threads and make fun of the vp44 ***** pumps LOL 12valves of fury baby!
All in fun Dude. I do want to see you reach your goals tho. I'll try to help or find some one that can
 
  #18  
Old 03-31-2009, 09:10 AM
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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
 
  #19  
Old 03-31-2009, 04:11 PM
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got it to go 110 with the 100 plate and still had more to goooooooo. But i was a little scared because the boost was going threw the roof. i was going slow with the throttle watching my gauge and once hit it 30psi i was backing off but saw how fast i was going and hit the throttle, my gauge hit @110 and i back out as fast as i could. but 110 is a nice top speed way better than 95, but now i am hungry for more speed and more upgrades.....
 
  #20  
Old 03-31-2009, 08:50 PM
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So you could slowly climb to that point but not if you try to do it fast? If thats the case I would say FP is too low up high.
 


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