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

12 valve high egts

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Old 09-28-2010, 10:37 PM
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Default 12 valve high egts

im having problems out of my 12 valve just put twins on it the top turbo is a tec 62 the bottom is a garret ht3b i have 4" ex. 4k govener springs afc turned all the way out 100 plate timming at 14.5 stock injectors havent decided what i want to go with yet i tow alot is the reason for the twins everbody say they run cooler mine will 1200deg. at the drop of a hat a little help please
 
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Old 09-28-2010, 11:42 PM
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Well running twins with stock injectors doesn't help to much because your more than likely not getting your primary to get going.... Some SDX 5x.012 injectors would be a mild upgrade and probably be able to get your turbos moving along with a nice bump in power while being able to pull some descent size loads

But, what kind of transmission do you have? Stock auto, manuel? I only ask because you didn't say anything about it. The stock auto want last to long, also a standard will only go so far as well without a good clutch?
 
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Old 09-29-2010, 12:06 AM
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its a 5 speed im fixing to go threw it and re-build it i have a dual disc south bend im goin to put in it and i was thinking about 5x.014 for injectors but didnt no if that be to much for towing i thought it might be ok beens i got so much air there to suport it how much horsepower & turque could i get out off this set up with 5x.012 or 5x.014
 

Last edited by bean farms; 09-29-2010 at 12:14 AM.
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Old 09-29-2010, 12:11 AM
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first of all, it doesnt sound like your getting the bottom turbo spooled at all...14.5° timing???????SERIOUSLY??????? timing will lower temps also, you need a few 4+ degree's more. what year of engine, depends on the pump to know how much fuel your getting
 
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Old 09-29-2010, 12:16 AM
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well i rely dont now were my timming needs to be my pump is a 98 215 pump will advancing my timming hurt my bottom end power just curious also i dont have studs or rings didnt plan on goin over 40psi on my boost
 

Last edited by bean farms; 09-29-2010 at 12:20 AM.
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Old 09-29-2010, 12:38 AM
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you might loose a little bottom end, but you have a hand shaker so who cares..at 40lbs your getting 8-10 out of the bottom turbo, not enough to make the egt's drop. Take the timing to 16° or so
 
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Old 09-29-2010, 12:45 AM
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ok ill try that do you think that will lower my egts . what about injectors? what do i need to go with and still be able to tow and what amount of horsepower and turque can i get will bigger injector lines help any i would like to get that lope and will that kill my fuel milage
 
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Old 09-29-2010, 12:49 AM
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x3, bump your timing up. your not gonna get anywhere lowering EGTs with it that low. Do you have studs? If so I'd be running 18-22*, but thats me...
 
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Old 09-29-2010, 01:04 AM
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no head studs
 
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Old 09-29-2010, 10:19 AM
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Originally Posted by bean farms
ok ill try that do you think that will lower my egts . what about injectors? what do i need to go with and still be able to tow and what amount of horsepower and turque can i get will bigger injector lines help any i would like to get that lope and will that kill my fuel milage
How much weight are you towing? That'll be a big factor into what injectors to get. If towing heavy, SDX 5x12s would be good. 5x14s may be pushing it a little to far, but it may be doable if your not trying to tow something huge...

Bigger fuel lines do nothing for power and it's not a VP pump so you won't get a lope on your truck from sticking bigger lines on it. Also I don't think you'll want a lope if your towing, as a loping engine tends to be less street friendly
 


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