What is the safest(highest) egt that i can hold all day long while towing?
Thanks
Dan

 

1100 constant MAX

 

Ive heard that the cummins spec is 1250.

 

I think its 1250 also

 

To clarify things, this reading is done pre-turbo--correct? Post turbo readings will be lower and will not accurately show temps across the pistons.

 

Yes sir pre-turbo..sorry

 

Yes pre turbo. Trailer life tested a gen 3 dodge truck and stock going up a 6% grade it ran 1300. After the mods it ran 1350 and they didn't seem to think that was too high.

 

Yes, 1250 pre-turbo is as high as I would want to see on a consistent basis.

 

I'd say be safe and call it 1200 even for anything but the 600 series. On those 1350 will probably be fine. And be sure if you tow at those temps to let the truck cool down first before turning it off.

 

The sensor was placed in the exhaust pipe elbow right after the turbine on my CTD. The installer said it's un-nerving for some operators to see the high EGTs that periodically result before the turbo-charger; therefore, he puts the sensor after the turbo. They charged me $200 over their estimate for the installation. I now only have one guage that reads out the post EGT and Boost pressure. In the future I may get another guage installed with sensors to read fuel pressure and pre-turbo EGT. What do you guys suggest for a maximum constant post exhaust gas temperature when pulling a heavy load?

 

i'd suggest you go to a different shop that isnt worried about people seeing a "hot" pre turbo temperature.... thats is rediculous


better off seeing gauge pegged then roasting your motor...


go to a different shop and get your thermocouple put in the manifold *pre-turbo* and dont risk your motor.

 

I had mine post turbo first. A few months later i moved to pre-turbo and saw a difference in 300 degrees from post to pre turbo.

 

Just say no to post turbo pyrometers.
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As miner suggested, it is better to get a pre-turbo reading then take a chance in possibly overheating the aluminum pistons for perlonged periods and damage the aluminum alloy metal. Before I had the pyrometer installed I did not let the CTD engine pull at low rpms for a long duration. Now that I have the EGT guage I was told by the installer to not let the read out go over 1000 degrees Fahrenheit. Twodiesels observed a difference of 300 degrees between the pre-turbo temperature and the post-turbo temperature. If my pyrometer does not go above 1000 then the combustion chamber temperature should not be much over 1300 degrees. I think I read that aluminum alloy melts at a constant 1350 degrees. When I operated a highway tractor the pyrometer said not to let the reading get over 1200 degrees Fahrenheit. Thanks for the information.

 

When I first got my truck and started pulling the 5er I was concerned about EGT's. I have a stock truck and plan to keep it that way, but I contacted Cummins for some info.

In short, they said that my engine could maintain 1350 degrees pre-turbo all day long without damage. They also stated that in stock form, "if i didn't LUG the engine" the temps would not exceed the 1350 degrees.

Lugging the engine means not being able to accelerate while applying more fuel.

Also stated when working the engine, to run the engine in the "power band", which is between the rpm's of peak torque and peak hp. On my engine that is from 1400 to 2700 rpm.