Running a litlle Hot

[WSelby]

I have a 04. 5 manual crew cab dually with 50,000 on it. We swapped muffler for straight through and put AFE intake with tourque tube on it to try and get it run a lil cooler. Towing today over pass I had the EGT guage burried At around 1650 to 1700 degrees for 24 minutes straight. When I got home opened the hood to see that the manifold, turbo and exhaust brake all turned blue. I cant believe it lasted that long that hot, also that it runs that hot without a chip or anything on it.

 

[JCasper]

Holy cow. I don't have any gauges yet, now you make me worry.

 

[WDimig]

first off :--) and second :--) :--) :--) while i may be wrong here, but any cummins stock or modified, ive never heard of one run at 1600deg. for 24 min!, much rather 5 or 10 min with out completely destroying itself. i didnt think that stock engines ran much hotter than 1350. deg. you got really lucky, do you run your engine at those temps alot?? im sure if you do, it wont last that long.



wes

 

[keimmmo]

Sounds awfully hot for too long to still be running. Are you sure the guage is accurate?



Steve

 

[lmills]

I have heard of one other that did an extreme test like that and it held. However it was being tested by cummins themselves to try to duplicate a problem. Also, Mark at TST has seen some pretty insane numbers for long periods of times while doing his testing. He has told me of 1450-1500 numbers for 30-45 miuntes at a time.

 

[JRockwell]

Does the factory programing defuel to ensure that these motors don't get to hot on the exhaust side?

 

[lmills]

Only if the ecm sees a loss of boost pressure.

 

[RAMINSPEED]

Those are some real high numbers, are you sure you dont have a boost leak?

 

[WSelby]

double checked

Yeah I double checked my guage with one out of my 12 valve. I have run it like this since we had 10000 miles on the guages. I didnt know it until recently when i installed the boost and pyro on it. I dont think it is a boost leak, consistently running 25-27 pounds of boost. I think it will be interesting to see how much longer it will handle it before dodge has to put a new motor in it. I would recomend that anyone who tows any kind of load to out guages in there truck.

 

[jjdiesel]

Where is the pyro located... pre or post turbo? That would tell a lot

 

[driverno8]

I'm going to watch this thread carefully. My buddy just mentioned his 600 auto was running 1300-1400 with just a AFE and straight piped. He's towing 16,500lbs. Had to turn his juice off completely because of temps. Even on the stock setting is still seeing 1400 easily while climbing at 60mph and 2500rpms. I told him the 600 runs a bit hot. But even if it's on the stock setting it should still be safe. They built them to tow that type of load. Right?

 

[GOTSOOT]

You need to go get it reflashed- this will help a little

 

[jjdiesel]

All this conversation is useless until we know WHERE the pyro is located!! Huge difference in temps. . depending on location. Is the probe in the exhaust manifold?

 

[lmills]

if he was running 1700 post turbo for that long, it probably wouldn't be still running.

 

[RAndrae]

for 24 minutes WHY??????????????????????????????????????

 

[PKozlowski]

first off :--) and second :--) :--) :--) while i may be wrong here, but any cummins stock or modified, ive never heard of one run at 1600deg. for 24 min!, much rather 5 or 10 min with out completely destroying itself. i didnt think that stock engines ran much hotter than 1350. deg. you got really lucky, do you run your engine at those temps alot?? im sure if you do, it wont last that long.



wes

Well I'm having the same exact problem with my 01 and a 6speed.

I can EASILY get 1550+ out of the EGT on a pull. NO problem.

Exhaust is this purple blue dark gray metalic color.



I am in contact with Cummins about this.

They wanted pictures so I sent them. We'll see where it goes.



Pete

 

[PKozlowski]

should have said the exhaust manifold and turbo are this purple blue dark gray metalic color.

 

[driverno8]

Sorry. Pyro is pre in the manifold.

 

[WSelby]

the probe is pre turbo, i think it is prolly impossilbe to get one that hot post turbo. I was towing about 17000 pounds on trailer. Why not run it that hot for 24 minutes it has a warranty on it.