6.7 EGTs

[RPelletier]

My dad has an '07. 5 with the 6. 7,thats completely stock.



We're installing some gauges this weekend.



How hot can he run the 6. 7 when he is towing his travel trailer?

 

[Jim W]

I do not know what type of trailer your dad is pulling and where you live. This will make a difference in pulling temps. When I pull my 5er on flat terrain my temps will run around 800F. When in regen they may go as high as 1350F. When I pulled out west in SD last year the turbo temp was 900F if I remember correctly.

This is why the turbo is water cooled in the 6. 7L. I would also search the threads in this forum and look on how at issue 60 on how to install the gauges.

 

[HBarlow]

My dad has an '07. 5 with the 6. 7,thats completely stock.

We're installing some gauges this weekend.

How hot can he run the 6. 7 when he is towing his travel trailer?

The new engine is computer-controlled. Fueling and turbo boost are regulated by the ECM. As long as the engine remains factory stock unmodified and as long as your dad is pulling a load not greatly in excess of factory specified maximum gross combined weight ratings he can run it with foot to the floor on every steep grade.

The engine was designed and tested by Cummins engineers to run at full power output and full load every day of its service life.

In other words, tell him to use the power and enjoy it. He can't break it.

The gauges will allow him to know and understand what the engine is doing but he won't need to back off the throttle to avoid exceeding whatever maximum EGT the engine is producing. The freqent discussions you read here in TDR are concerning engines modified to produce more power.

 

[RPelletier]

I do not know what type of trailer your dad is pulling and where you live.

Its a 34' travel trailer that weighs in about 9000lbs.



We live north of Seattle and pull throughout the NW.

 

[AABEN]

You can ask your dodge dealer! I do not run my over 1250f I planed to keep it for a longe time. I pull a 38ft fifth wheel. My total weight is 22900 I am a snowbird we are on the road 6 months a year you can see what i have done to it.

 

[HBarlow]

Its a 34' travel trailer that weighs in about 9000lbs.

We live north of Seattle and pull throughout the NW.

Tell you dad to put his foot to the floor when and if needed and enjoy the pulling power of his mighty Cummins 6. 7 and the new six speed automatic. He won't harm it or shorten it's service life.

Three or four years ago I exchanged e-mails with a Cummins engineer regarding design limits on exhaust gas temps on the new 2004 HPCR engines when it was reported in TDR that the new HO engines with gauges were running hotter egts than we members were familiar with. The engineer told me that during the engineering trials of the new HPCR 5. 9 engine in the Dodge platform, with full instrumentation recording temps, they ran the engines at a sustained 1425*. The engines were designed, built, tested, and are covered by warranty (for five years, 100k miles) at whatever temperature it reaches under full power and full load. From my own experience with a very high mileage 2001 and a high mileage 2006 you cannot damage the engine under full power and full throttle if it is operating at design parameters.

If the engine is modified with aftermarket injectors, turbos, or electronic boxes, or operating at 40,000 lbs. gross combined weight then all bets are off although I don't think overloading our Dodge Cummins to 40,000 lbs. will damage them either. Lots of hotshotters have been doing it for years and getting half a million or more miles out of their trucks.

 

[Hoefler]

Like said before, put it in gear, mash the pedal and steer. I pull a 38' fifth wheel that weighs in at 17,000. I set the cruise where I am comfortable for the conditions, ( 60- 70 mph ) and go. Some times I keep it in 5th if it doesn't want to stay in 6th as much as I would like. Bottom line, if the 6. 7 stays unmodified, it will protect it's self from destruction. Because of the emissions that are being required, it has to run hotter to keep things working and to stay clean. My service tech has told me that it is the worse thing to baby these motors, he said to get it hot and keep it there and I won't be seeing him.

 

[B-rock]

Im hitting 1600 on full throttle run's quite often. The 6. 7's run a lot hotter then the 5. 9. BTW the turbo is not entirely water cooled, Just where the electronics are located in the turbo itself.