EGT high or normal

[EMurillo]

i got a question for you fellows, i tow a fifth wheel that is 27. 5 feet

about 12,000 fully loaded, and i notice that my egt go up to 1350 or

bellow because i dont let it get any higher. and i do have gages egt,trans,

boost hoping to get a power tuner, but i have not got it jet.

i thought that the engine suppossed to defuel after it gets to 1200 and

if that is the case what is making my egts go up that high. or is that normal

any input would appreciate. thanks. pyrometer is before turbo





2004. 5 ctd, 2500 swd, 4 x 4 , 325/600, 48re,

 

[Bertram65]

i got a question for you fellows, i tow a fifth wheel that is 27. 5 feet

about 12,000 fully loaded, and i notice that my egt go up to 1350 or

bellow because i dont let it get any higher. and i do have gages egt,trans,

boost hoping to get a power tuner, but i have not got it jet.

i thought that the engine suppossed to defuel after it gets to 1200 and

if that is the case what is making my egts go up that high. or is that normal

any input would appreciate. thanks. pyrometer is before turbo





2004. 5 ctd, 2500 swd, 4 x 4 , 325/600, 48re,

If your truck is stock you really cannot hurt it towing if you are within the towing limits of the truck, push it and see how high the EGTs go.

 

[Hoefler]

Totally stock, pulling 35 footer, around 15K, my EGTs would got to 1450 in a long hard pull. That was my first hard pull on my truck 25000 miles ago. It did it off and on all day on that 14 hour trip. Other than a different muffler, missing cat, and air filter change, I was totally stock on the power side. I figured if it was not designed to run that hot, the ECM or something would shut me down. That never happened. I hate to see what would have happened if the cat was still in. My EGTs went down approximately 75* - 100* after it fell off. Pulling a 6-7k trailer every day, I usually see 1300* on a regular basis. I have some pretty steep grades around here.

 

[Prairie Dog]

Strangely enough, these truck dont know what EGT's are so it wont defuel unless it see's another problem with the eng.



Scotty

 

[SnoKing]

Even my 2001. 5 would run too hot stock when pulling hard in the mountains. The issue I believe is the small HY35 Turbo. I recently installed a PDR35, but have not towed yet with it. SNOKING

 

[PKozlowski]

I pull a 30' 5th wheel and 20' Big Tex flat bed trailer with two Polaris 700 atvs.

I easily see 1350 pulling hard.

I took the cat and muffler off and that did help alot to keep the EGT lower (1200 deg).

Put the EZ on it to and believe it or not that helped even more!

How that happend I'm not sure yet.

 

[Joseph Donnelly]

You have the egt probe in the right place, in the exhaust manifold. The 2004. 5 engine that you have is designed to run with egt up to 1450-1500 degrees, unlike the second generation and first generation engines that were designed to run up to 1300 degrees. I like to keep my engines, below the maximum recommended egt. You should be safe at 1350 degrees, however.

 

[otis]

I had a stock 02 with guages and pulled a 12k fifth wheel and easily could bury my egts which made me back off a liitle when i needed. I now have a 06 and pull a backhoe through some steep grades daily and I have no choice to having it pinned at times for longer than i would like, so I'm sure I'm in the red. I don't have guages on the new truck so I hope that I don't have any meltdowns. To me a it would make sense that a stock truck shouldn't cook itself. I guess i'll find out one way or another.

 

[crobertson1]

I'm not trying to be a smart alec or anything, I just need help to undestand this.



Why does it make any difference if the truck is stock or not? 1450 degrees is 1450 degrees whether it's stock or not right? I've read the same thing before that if it's stock, you can't hurt it.



I can easily hit 1450 degrees while towing in the mountains. I'm always backing out of the throttle to keep it in control. I've changed air filters and put on a high flow muffler to try to help.

 

[PKozlowski]

Your not being a smart alec. Your getting the same story

we all get.

Your right 1450 is 1450. Doesn't matter if you make 2 horse power or 2000.



Stock. If I down shifted to 5th and mashed on it.

Forget it! 1500 degrees EASY!



I had the same question and finally gave up getting an answer.



I asked Cummins directly and they said I would NEVER see any EGT

over 1200 stock. Uh. I do! And I see it ALL the time!



So I went about looking for a cheap way to keep it down.

I took off the cat and muffler. That helped alot! Still the stock

size what ever that is 4"?



I put an EDGE EZ on it and figured this would be the wrong thing to do.

go ahead, add more horses and fuel and end up with high temps again.

But! It's didn't really work that way. My temps do not raise as fast

or as high. No I can't explain it. Granted I can still get it up to 1500

if I want to but with the cruise set at 75 pulling my toys around

it peaks at 1250 to 1300 egt average.

I don't worry about it anymore.



If you want to get the temps down the only way I found that

really works is a bigger diameter exhaust.

It's the cheap mans way to fix the problem.

Maybe a bigger exhaust pipe and a muffler?



Pete

 

[jelag]

My 04 now has 130 K miles pulling a trailer that weighs 20K lbs most of the time... this truck has never seen a tank full of fuel with out a load... . Since it's stock we don't use a gauge and just run the truck... . If it dies before 350 K miles I'll let you know...

 

[Bertram65]

If you could burn up the engine on a stock truck then probably 98 out of every 100 Dodge trucks with the CTD engine that tow would be burned up. 98% of the people who buy and use these trucks just drive them and have no idea about EGTs, they hammer up hills with the pedal to the floor never letting off, or letting the turbo cool down after a long run and you do not hear about people having problems with them, if they did it would not take long for the word to get out.

Guages on a stock truck are interesting to watch and can help detect a problem early if you notice a change in normal operation, but that's about it.

 

[Hoefler]

One thing to consider when talking to the Cummins people directly, the engines they deal with have the pyrometer mounted post turbo. I have yet to see a class 8 truck with a pre-turbo mounted pyrometer.

 

[DGStrate]

Why the EZ helped lower EGTs...

Your not being a smart alec. Your getting the same story

we all get.

Your right 1450 is 1450. Doesn't matter if you make 2 horse power or 2000.



Stock. If I down shifted to 5th and mashed on it.

Forget it! 1500 degrees EASY!



I had the same question and finally gave up getting an answer.



I asked Cummins directly and they said I would NEVER see any EGT

over 1200 stock. Uh. I do! And I see it ALL the time!



So I went about looking for a cheap way to keep it down.

I took off the cat and muffler. That helped alot! Still the stock

size what ever that is 4"?



I put an EDGE EZ on it and figured this would be the wrong thing to do.

go ahead, add more horses and fuel and end up with high temps again.

But! It's didn't really work that way. My temps do not raise as fast

or as high. No I can't explain it. Granted I can still get it up to 1500

if I want to but with the cruise set at 75 pulling my toys around

it peaks at 1250 to 1300 egt average.

I don't worry about it anymore.



If you want to get the temps down the only way I found that

really works is a bigger diameter exhaust.

It's the cheap mans way to fix the problem.

Maybe a bigger exhaust pipe and a muffler?



Pete

To help you understand why the Edge EZ helped you out:



1) Higher pressure (the EZ is a pressure box) leads to better atomization of the fuel you are spraying into the cylinder - this results in a better/more complete "burn" so there is not as much fuel heading out the exhaust ports while still in process of burning,



and



2) Edge EZ has some timing increase. Increased timing results in higher cylinder pressures and creation of slightly more NOx emissions, but produces lower EGTs and better (more) power, as the engine has enought time to more completely burn the fuel in the cylinder before dumping it out the exhaust valves...



Helps?

 

[SnoKing]

To help you understand why the Edge EZ helped you out:



1) Higher pressure (the EZ is a pressure box) leads to better atomization of the fuel you are spraying into the cylinder - this results in a better/more complete "burn" so there is not as much fuel heading out the exhaust ports while still in process of burning,



and



2) Edge EZ has some timing increase. Increased timing results in higher cylinder pressures and creation of slightly more NOx emissions, but produces lower EGTs and better (more) power, as the engine has enought time to more completely burn the fuel in the cylinder before dumping it out the exhaust valves...



Helps?

I thought the EZ (and untapped Comp) was a timing only box, could you explain the "(the EZ is a pressure box)"? Are you referring to the boost fooling? SNOKING

 

[DGStrate]

I thought the EZ (and untapped Comp) was a timing only box, could you explain the "(the EZ is a pressure box)"? Are you referring to the boost fooling? SNOKING

I could be wrong, but I believe that the EZ is a pressure/timing box... According to the install directions on 2003 & up trucks, it connects to the MAP sensor (for boost fooling) and to the Fuel Pressure sensor (I believe for pressure increase/fooling). I do think it also adds some timing into the mix, and may be coupled with a Boost Elbow to allow higher boost pressures than with the stock wastegate spring (2003 and early 2004 trucks - 2004. 5 went to an electronically controlled wastegate).



According to the Edge web site:

"The Power Edge EZ is a plug-in module that maximizes engine efficiency by monitoring the RPM, timing, turbo boost pressure and fueling parameters. The module uses this information to determine and control both fueling and timing enhancements for the Bosch fuel injection pump. The re-mapping of the fueling and timing parameters is done via the CAN-BUS communication system. The CAN-BUS protocol is used to communicate between the Cummins Engine Control Module (ECM) and the Bosch fuel injection pump. All data sent from the EZ is within the limits of the Bosch fuel injection pump. This enables smooth and predictable power delivery without compromising integrity. This increase in power does not increase the exhaust smoke from a stock engine.



The Edge EZ allows maximum fueling at full turbo boost and provides an additional 65-rear wheel horsepower, an additional 185 foot pounds of torque and installs in minutes. Simply plug the EZ connectors into the ECM Data Link connection and MAP sensor. There’s no need to unplug the Bosch fuel injection pump connector, it is completely weatherproof and mounts easily under the hood. "

 

[JHardwick]

The common rail EZ is a pressure only box, not sure about the others. But I think models are being confused here.



Back to the EGT's ... ... ... . I gotta redline my truck with a load to see 1200* in stock form