EGT'S /Towing

[bwfairchild]

Have upgraded my 2004. 5 with a stage 1 afe proguard 7 filter along with Dave's blue hose and have set the power pup to tow mode. Pulling a 6% grade with a 10,000lb travel trailer, it appears that I would have no problem hitting 1450 egt with 32 boost. Is that a big problem?? I assume that performance mode would be worse? Any thoughts?

 

[HOBrian]

I would say that yes 1450 is high. I would not drive at that temp very long. How long are you in that temp range? Does this happen a lot?

 

[CLAYTON]

Might be time for an upgraded exhaust (take off about 75-150*) and a BHAF (take off another 50*) that should get your temps down around 1250-1300* If you need more off the top then that slap on a new turbo. Just a thought

 

[DLoughery]

Have upgraded my 2004. 5 with a stage 1 afe proguard 7 filter along with Dave's blue hose and have set the power pup to tow mode. Pulling a 6% grade with a 10,000lb travel trailer, it appears that I would have no problem hitting 1450 egt with 32 boost. Is that a big problem?? I assume that performance mode would be worse? Any thoughts?

I tow heavy most of the time. I have the X-Monitor set to alarm at 1250. I don't even like seeing it in the high 11's for any extended period of time. I would say that at 1450 for more than a very short duration, things would start to overstressed.

 

[jnelson]

bwfairchild - I also can easily obtain these temps - even stock. While taking a load of pipe to Wyoming several months back - I could easily get up to 1500* with my edge EZ unplugged pulling long grades. I have moved my egt probe post turbo per Cummins reccomendations and I can get temps up to 1200* on heavy load accelleration and pulling long grades. This is with my EZ on 20hp or level 1.



I watch my temps, but I dont worry about them. I just worry about an injector sticking open and buring a hole through a piston.

 

[jimnance]

I would say that yes 1450 is high. I would not drive at that temp very long. How long are you in that temp range? Does this happen a lot?

I'm puzzled why the turbo seems to be the weak link in our CTD's. One person mentioned that if I wanted to exceed 1350F for any period of time I'd have to have some kind of exotic ceramic turbo. Why?



On my aircraft I can run all day long at 1550 F EGT's and 1600 F TIT's (Turbine inlet temperature) . They are fairly normal Garrett turbos and are not made of any kind of ceramic material. At about 1650 TIT you reach the danger zone in the aircraft turbo where "blade creep" caused by the blade material becoming somewhat plastic occurs.



So what gives, do we have cheap turbo's in our trucks?

 

[J.Davy]

I have heard from both T. S. T. and Diesel Dynamics that 1450 F. is max safe temp as per Cummins recommendations on the third gens,Mark from T. S. T. said they ran a truck on their dyno at 1500 f. for a half hour with no effects on the internals,however the discharge air was so hot it blew off or melted the hose to the intercooler. The high pre turbo temps are do to late injection events on third gens.

 

[OT-OF-HERE!!]

EGT temps

bwfairchild - I also can easily obtain these temps - even stock. While taking a load of pipe to Wyoming several months back - I could easily get up to 1500* with my edge EZ unplugged pulling long grades. I have moved my egt probe post turbo per Cummins reccomendations and I can get temps up to 1200* on heavy load accelleration and pulling long grades. This is with my EZ on 20hp or level 1.



I watch my temps, but I dont worry about them. I just worry about an injector sticking open and buring a hole through a piston.

I would think that you'd run cooler with the EZ on level 1 as you'd have timing and very little fueling. Also, I run pre and post and there is about a 300 degree difference under load between them. To change pre to post doesn't resolve your problem. What kind of speed are you encountering 1500*?

 

[Matt400]

The high pre turbo temps are do to late injection events on third gens.

Ahh, kinda like long duration boxes.

 

[Gary - K7GLD]

"On my aircraft I can run all day long at 1550 F EGT's and 1600 F TIT's (Turbine inlet temperature) . They are fairly normal Garrett turbos and are not made of any kind of ceramic material. At about 1650 TIT you reach the danger zone in the aircraft turbo where "blade creep" caused by the blade material becoming somewhat plastic occurs. "



EGT concerns are not so much due to the turbo itself, as it is to the engine's internals - pistons, valves, etc. - the turbo probably CAN take more heat than the pistons can... The reason for recommendations for a different turbo to reduce EGT is the intent to get a LARGER airflow to the engine cylinders to reduce EGT, not to get a turbo that will take more heat...