Exhaust temps

[TPetrik]

I have an 07.5 6.7 dually with auto trans 50k on truck. I do not use it for groceries it either has my wife's 30 ft gooseneck on it or my car trailer for the most part so it is usually being used for its intended use. I have what I think is the latest flash j35 regen,but this past summer I made 3 trips out to Detroit and back hauling weight and I noticed the get running hotter than I felt normal sometimes creeping into 1300 and change unless I dropped it a gear and backed her down some.i was not hammering it just 60 or so. Just last week took short trip with horse tailer about 1 hour and temps starting creeping up again and I could feel truck nose over a bit just as I let off and dropped gear down. Generally truck runs 8-900 temp as a norm but is there something failing and should I install a egt probe post turbo minis installed pre turbo.i understand the whole regen process but this seems to be acting differently than say just a year ago.i have made many long toss before the above mentioned trips with no temps climbing that high.

 

[Jim W]

Before I deleted my 08 the truck would run between 800 and 1000F for most of the time when towing. The truck would creep up between 1300 and 1450F only when the truck would regen. Boost pressure would never change and the RPM's remain constant. I would also check the OHD to see the fuel mileage; this would tend to drop off when I was in regen and pick back-up when the regen process was over.

Do you run the exhaust brake all of the time when driving the truck? Have you checked the fuel mileage when the temps creep up as you tow?

The truck might be trying to regen do to a DPF loading up with more soot since the OD has over 50K now on the truck. Just a guess?

Let us know what you find out.

Jim W.

 

[AH64ID]

I have an 07.5 6.7 dually with auto trans 50k on truck. I do not use it for groceries it either has my wife's 30 ft gooseneck on it or my car trailer for the most part so it is usually being used for its intended use. I have what I think is the latest flash j35 regen,but this past summer I made 3 trips out to Detroit and back hauling weight and I noticed the get running hotter than I felt normal sometimes creeping into 1300 and change unless I dropped it a gear and backed her down some.i was not hammering it just 60 or so. Just last week took short trip with horse tailer about 1 hour and temps starting creeping up again and I could feel truck nose over a bit just as I let off and dropped gear down. Generally truck runs 8-900 temp as a norm but is there something failing and should I install a egt probe post turbo minis installed pre turbo.i understand the whole regen process but this seems to be acting differently than say just a year ago.i have made many long toss before the above mentioned trips with no temps climbing that high.

I assume your tuning is stock??

Have you pulled the intake plenum and cleaned the soot out?

 

[TPetrik]

Thx for your input I feel a little better hearing similar temps from other trucks I know it probably was in regen but was nervous of how hot it was.i run exhaust brake all the time unless icy road conditions. My mileage is slightly lower but not much during these high temps letting me know it was in regen but like I said thought temps were a bit high.

 

[TPetrik]

Yes stock tune and no did not pull plenum but will do asap thx.

 

[AH64ID]

Yes stock tune and no did not pull plenum but will do asap thx.

The temps aren't abnormal for a stock tune, but they do build up soot in the intake from the EGR which can lead to decreased airflow and increased EGT's.

 

[TPetrik]

Jim w. What kind of delete did you install and were there any complications with concerning shifting ?

 

[Jim W]

Jim w. What kind of delete did you install and were there any complications with concerning shifting ?

Hi; I used a Smarty S67 for the programmer following their directions and using the ME23 software. I used a 5.9L long bed crew cab exhaust system from MBRP. I also have gauges on the A pillar; they are EGT,BOOST,and TRANSMISSION Temps. I did not delete the EGR cooler this helps in keeping the truck warm in the winter.

Now the best programmer on the market today is EFILive since Smarty and Edge along with H&S are not providing delete tuners do to the EPA actions.

I have been this way for over 60k miles without any issues and I tow a Cedar Creek 34RL which will be around 12,5K in weigth. My old 5er was a 318SAB Cougar and this had a total GVCW of 18,500 lbs with my truck included.

Hope this helps?


Jim W

 

[TPetrik]

Thx for the feedback I will do some research on those tuners and also if cold temp were not an issue would you also delete egr cooler?

 

[Jim W]

Thx for the feedback I will do some research on those tuners and also if cold temp were not an issue would you also delete egr cooler?

No,
The EGR cooler is a poor man's waste gate for the turbo in my opinion. Everyone that I have discussed their deletes with and have deleted the cooler and running higher HP tunes then stock have failed the head gasket over time; if they have not put head studs in.

This is just my observation and I do not have any engineering data to back this up. I do know that the exhaust gases from the truck will have some of the output routed to the cooler and the rest goes into driving the turbo. So when the cooler is eliminated all of the exhaust gas is routed to the turbo which inturn will increase drive pressure of the turbo. I am not sure what side of the head gasket will fail; the intake or exhaust side since I have not done any failure anislsys on the gasket. But I have not had any failure as of yet in 62,000 miles.

Just my thinking and reasoning for headgasket failures.

Jim W.

 

[RustyJC]

Actually, the lack of dilution of the combustion air charge with the recirculated exhaust gas means that more oxygen is available to burn more fuel than before. The result would be higher peak firing pressures on a deleted engine.

The purpose of the exhaust gas recirculation is to dilute the air in the cylinder with an inert gas that will absorb some of the heat of combustion. This reduces peak combustion temperatures and lessens the production of NOx. The fact that not as much fuel/air charge can be burned means that Cummins had to increase displacement (5.9L to 6.7L) to hold power and torque ratings with EGR.

Rusty

 

[Jim W]

Actually, the lack of dilution of the combustion air charge with the recirculated exhaust gas means that more oxygen is available to burn more fuel than before. The result would be higher peak firing pressures on a deleted engine.

The purpose of the exhaust gas recirculation is to dilute the air in the cylinder with an inert gas that will absorb some of the heat of combustion. This reduces peak combustion temperatures and lessens the production of NOx. The fact that not as much fuel/air charge can be burned means that Cummins had to increase displacement (5.9L to 6.7L) to hold power and torque ratings with EGR.

Rusty

Rusty; that is true if the cooler is not block like mine is. The ERG valve is gone and the cross over tube is MIA. The port to the inlet tube from the EGR valve air horn is covered and the outlet for the cooler is closed off also. The cooler is still on the truck and the flow from the exhaust to the cooler is still intact. I have been this way for 61,000 + miles.

Jim W.

 

[TPetrik]

Jim w. Your comments on the head gaskets make since in regards to the turbo pressures thanks in advance for that input. Now in regards to tuners you wrote that you used a smarty s67, does that me 23 software come with it? I'm also a little confused you said that smartys are not dpf delete tuners due to epa

 

[Jim W]

Jim w. Your comments on the head gaskets make since in regards to the turbo pressures thanks in advance for that input. Now in regards to tuners you wrote that you used a smarty s67, does that me 23 software come with it? I'm also a little confused you said that smartys are not dpf delete tuners due to epa

The EPA started to crack down on the emission delete tuner companies in late 2010 early 2011; I believe this could have been +/- a year or so. Edge products was fined along with H&S tuners either by CARB or the EPA, do a search on the internet for the amount of $$$ fined.

Mad's electronics which makes the Smarty and is an off shore company was not fined; but they stop selling delete tuners in the US under the Smarty Logo. All new Smarty S67 and JR tuners that work on the 6.7L Cummins engine with the US in the serial number are emission compliant now. And any software down load from the internet that will work on the S67/JR models is also emission compliant now. So I have not downloaded any software up dates to my Smarty since 2010.

Smarty's do not come loaded with software from the factory; now the US dealer will down load in some case the latest available up date that Smarty has released at the time. My unit did not have any program on the tuner when I purchase this new and I started out with 14ME tune and since upgraded to the 23ME tune by Nov 2010. I have been this way ever since.

I would not buy any used Smarty's unless you can verify that the Smarty is not VIN lock to a truck nor has the "US" in the serial number on it.

I would look at EFILive for a tuner for your truck now as this is the best one in the marlet place today.

Jim W.

 

[TPetrik]

Thank Jim I will do some more reading part of my confusion is the fact that these tuners are for a factory truck with all dpf equip installed correct but the cookers are removed, yet there is no code issues? My thinking now is I should have never sold my 12 valve thanks again . I'm sure I will be on again asking more?

 

[TPetrik]

Jimw. I talked to 4 different diesel performance shops I found on line regarding tuners and deletes if I am understanding this right when I delete dpf and install tuner egr is inacti,does that sound correct and what you had said leave plumbing intact for some pressure bleed off am I understanding that correct all shops I talked to recomended Efp or race me tuners thanks in advance for any input you might have

 

[TPetrik]

Jim w did you get last post about me talking to shops I am not sure if my post went through let me know

 

[Jim W]

Jim w did you get last post about me talking to shops I am not sure if my post went through let me know

No I did not. What you should try if you want a fast answer is to send a private message thru TDR to the user. They will get an e-mail in their mail folder and will than respond to you sooner.

OK,
I would recommend the EFIlive tuner over the Race me tuner. I believe that the Race me is a non-Emission compliant Smarty that is sold now for delete capabilities. I do not know much about them nor where you would get software updates if needed.

The EFIlive tuners have a high reputation and have been will received in the Cummins community and our supported by several reliable diesel shops. Such as Anarchy diesel performance there are others.

Good Luck and keep in touch.

Jim W.