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Discussion Starter · #1 ·
i never had a prob with my egts i have a 98 12valve i put 37" tires on and now iam getting about 1100 degrees at 65-70 is there anything i can do to lower it to decrese it mods i have done are 5" exhaust and 0 fuel plate
 

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open up your air flow. Get yourself a cold air intake or a bhaf. Do u have an auto trans or manual, 3.55s or 4.10s?
 

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i never had a prob with my egts i have a 98 12valve i put 37" tires on and now iam getting about 1100 degrees at 65-70 is there anything i can do to lower it to decrese it mods i have done are 5" exhaust and 0 fuel plate
I hear ya brother....with my 38s my egts where similiar...like the other guy said..get more air
 

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definatly more air:thumbsup your truck is dying to breath. and yeah, auto or manual? what gears you got man?
 

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definatly more air:thumbsup your truck is dying to breath. and yeah, auto or manual? what gears you got man?
Keep in mind...when you are doing 65 on the speedo...you are doing almost 7-9 MPH faster with those tires.
 

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Discussion Starter · #6 ·
yeah i was taking my tire size into consideration i was guessing i was doing 65-70 its an auto with 3.54s i have a cold air intake on it
 

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Water/meth
 

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The air intake and exhaust are a start and the water meth kits help too but the fix for the problem is a good turbo charger!!!

When you push your factory turbo out of its efficiency range, which you are... two things happen. Reliability goes down but more important you produce a super heated charge of air which can rob you of HP. A cool-dense charge of air will allow more air into the motor resulting in more power and dramatically lower EGT's.

Start with the turbo, than the intercooler than if you are still hot look to the water meth kit. For your application the turbo will make enough difference that you should not need the intercooler of water meth.

Fix the problem, don't mask it up :thumbsup


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yeah i was taking my tire size into consideration i was guessing i was doing 65-70 its an auto with 3.54s i have a cold air intake on it
is your transmission slipping? That would cause your egts to increase in a hurry. If your tranny is stock, your asking for trouble with a 0 plate...a built tranny would almost definately help, but its not in everybody's budget
 

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i saw my brothers egts increase in his 24 valve auto cummins when his tc slipped alot. Im just exploring possible options and i thought it might cause high egts from power not making it to the rear wheels through slippage. I know the trans temp would increase, but i thought the egts might too. Sorry if this doesnt seem logical, im just trying to work out loose ends...
 

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where is your probe mounted. If its in the downpipe, expect the reading to be 3-400 degrees higher than if its mounted in the exhaust manifold. This would explain the 1100 degree readings at highway speeds.
 

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I pull my TT & I get EGT,s up to 1400 & I have no problems ,( my pryo is pre turbo )You have to remember that the aluminum has alloys added to it & is drop forged so it will not melt like untreated aluminum , Cummings been building diesels for a long time , would you think they would put in parts that would melt , Cummings knows what the EGT,s can get to & make their motors to surpass those temps ! the main thing is to keep a eye on the motor temp , as the EGT,s increase the motor temp will rise , as long as the temp stays in the safe zone you should not have any problems , IMO
 

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where is your probe mounted. If its in the downpipe, expect the reading to be 3-400 degrees higher than if its mounted in the exhaust manifold. This would explain the 1100 degree readings at highway speeds.
you got it backwards, it's hotter before the turbo, gases cool down as they move away from the engine
 
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