1650* EGT / Stock ??

[InThinAir]

I have my probe POST Turbo and I would say that what Cummins says is right on. I have had my POST turbo EGT to 1100* for minutes at a time haulin WITHIN the vehicles specs in the mountains. Both with my 01 and now my 03. My 01 is right at 100k, just did the trac bar and replaced the stocker this weekend.



I think these motors can handle 1400-1500 PRE turbo all day long... I will say that the paint on your hood can't handle that though... mine is changing colors.



---Doug

 

[Bouncy]

Well towing this past weekend. Just a small load of about 5k on a tag. I was hitting 1500+ pre-turbo. I have the AFE and torque tube and dumped the muffler a couple of weeks ago.



So more air in and more air out... I live in Michigan and it is pretty flat here.



I have heard all the 1200 degree pre-turbo stuff on here and always wondered why I was hitting about that. And that the 600s were HOTTER.



So I asked my buddy at Roush Racing. He said the turbos for GASSERs are seeing 1800 preturbo and run fine. He didn't know if turbo technology was any different for a diesel.



I guess since I have an extra temp probe, I should hook it up post turbo and see what it says. Though... You called a cummins "DEALER"



Has anyone called cummins directly and asked??

 

[Marco]

During the emissions tests on the engine dyno, no doubt that the EGT probe is located after the turbo. It's needed to determine the thermodinamic efficency of the engine under test.



There's also no doubt that when the same engine is developed on the engine dyno the probes are placed as close as possible to the exhaust valve. Then MAYBE they use also the thermocouple after the turbo.





Marco

 

[Cummins4WD]

Wouldn't the guy at TST be a good person to get accurate info on the Cummins EGT... I thought he used to engineer for Cummins which is why his TST box one of the best... he knows the ins and outs of these motors? Just curious if anyone has called him or if he will post here.



All I can say though is 27,000 lbs @ 68... that's pretty sweet! Oo.



Maybe that new Methane Injection system could be in order to drop 200 degrees off the EGTs... Isn't it Snow Enterprises that makes this system?



Randy

Denver, CO

 

[JVolpe]

What does 1100 degrees six inches post turbo calculate into pre-turbo pyro probe between 3 & 4 cylinder top of exhaust manifold?? 400 more, 200 more, 500 more??



Really wish I had an answer that I could use to control the EGTs, whether towing or drag racing.

 

[Snow man]

1100 post turbo is too hot,probably 1450 min,could be as high as 1600. move your pyro to pre turbo and you'll know for sure. The 600 is built to take more heat than previous engines.

 

[Sherman]

I can see that a lot of trucks don't work for a living by owners on this site,a 1 ton grossed over 25000#is very common in Texas,especially in the oil patch. If the Dodge can't do it the Ford or the Chevy will. I do believe the Dodge can,especially with the Cummins with the 6sd. Overloading is a fact of life,if you don't overload you will go broke in the truckin game. Why do you see so many trucks on the back roads,do you actually think they are making local deliveries?

 

[InThinAir]

This topic comes up over and over, as I said in a post from the weekend before last, I hit 1100* Post turbo coming home, well within the vehicles spec for CVW and GCVW. I was pulling a 7% grade at highway speed. This was my 03, my 01 has seen that temp quite a number of times, pulling again well within the vehicle specs for GCVW and right at the GVW, over mountain passes in CO.



I think it comes down to what you are comfortable with. I think that people at sea level can easily say "stay below 1250!" but if you do any kind of hauling in any kind of elevation change you will exceed that number day after day. Seeing numbers like 1000-1100* on my guage don't worry me anymore. But if they worry you then by all means slow down or lighten the load, or take out your pyro, that is what people do around here. I see many many trucks every day that I know are over that temp and the driver don't even know what EGT stands for!!!



It isn't CTDs that I see along the hills up in the mountains, not Fords or Dmaxs, it is old beat up gassers that have blown their radiators. So explain to me why there isn't more CTDs melted down?



---Doug

 

[jnelson]

E-mail from Cummins



Summary: 1650* EGT on stock motor



Solution:

Thanks for your Email message.



We hope your exhaust temp gauge is off. Thats about 300 deg. to high??????



Under full load, most Cummins engines produce exhaust temperatures in the cylinder about 1300 degF or so, on the engine dynomometer. Typically, over-the-road trucks measure EGT from two to six inches after the turbocharger in the exhaust pipe and at that point the EGT temp will be in the 700 to 900 degF range, under 'full load'.



In the Dodge Ram application, it is not likely the engine could be ran at 'full load' operation in the chassis but if it could or if overfueled, the exhaust EGT ahead of the turbocharger should not exceed the 900 to 1100 degF range. The exact temperature will vary on different applications with different pyrometers and the location of the temperature probe.



The pyrometer measures exhaust temperature and the probe is usually mounted about 2 to 6 inches from the turbo outlet (after the turbo) and in that area the exhaust temperature under 'full load' conditions should be in the 700 to 900 degF range. The pyrometer probe could be installed ahead of the turbo for maximum exhaust temperature out of the cylinders (900 to 1100 degF), however, if the probe ever fails it goes directly into the turbocharger and will likely cause a catastrophic failure of the turbocharger.



We thank you for your interest in Cummins products. Please let us know if you need assistance in locating the nearest Cummins-authorized Dealer or Distributor Service Provider. For assistance in locating a Service Provider, feel free to use Cummins North America Dealer Locator, which can be found on Cummins website:

http://www.cummins.com/service_locator/index.cfm



Please let us know if you have other questions and if away from your computer or have a time-critical request that needs more urgent attention, feel free to call us toll-free (from North America) at 1-800-DIESELS (343-7357).



Email direct: -- email address removed --



Regards,

--

Powermaster

Customer Assistance Center

Cummins, Inc.

Columbus, Indiana, USA





Upon acceleration with just and empty trailer (8300 lbs) I can get the EGT up to 1500 momentarily. Thats not pushing it - Thats normal acceleration. there are hundreds of trucks doing it every day down here in this humid hot south Texas oil patch.



I'll go by and have tha guys change out my EGT gauge to see what happens.

 

[JVolpe]

Before any mods, completely stock, gauges only, I could hit 32lb boost and 1250 degrees with just full throttle acceleration completely empty.



Now I am more confused than ever. Maybe muffler upgrade will help. After that I think I will drive it like I stole it and see what happens.

 

[InThinAir]

I see 800+ post turbo every day, completely empty, well, except for me and fuel. I guess I am lucky that it hasn't melted down. If I pushed past the posted speed limit, which I never do, I could get 900* completely empty. I guess I need to switch to a DMax, I get passed almost every night like I am standing still by a white one with a flat bed ... He doesn't have gauges but he must be in the acceptable range for that vehicle ... And I need to slow down because a 7% grade at 8000ft above see level at 60mph is too much for the mighty Cummins...



NOT!



---Doug

 

[jnelson]

Changed gauge out - no changes.



Coastal Diesel said they would move the probe to post turbo and plug the other hole.



She runs great - she pulls even better - I ain't gonna worry about it.

With 35,000 miles on her in 3 months and she ain dead yet - she'll be just fine.

 

[crobertson1]

jnelson,

Are you going to have the probe moved to post turbo? That "catastrophic turbo failure" thing is un-nerving.

Craig