EGT Safe temps?

[garrett]

So basically i want to know your temps and what is a safe amount and whats getting bad and extremely bad? my gq fmic setup and i get can up to 450 not even doing serious stuff my bros gq tmic barely hits 350 ever

also these temps are taken from dump pipe

[Crankshaft]

A lot will depend on where the temperature sensor is fitted in the pipe but I will do some searching and let you know

[nissannewby]

500-550 is the max safe limi (post turbo as close to turbo as possible)t for extended periods and even then you may see your coolant temp rise a little if kept up around these temps. Anything more than this can be detramental to engine life. With regards to your temps and other posts you have around here i would say you need a better tune. Does your rig blow much smoke out the exhaust?

[Crankshaft]

Found this
Why is it necessary to monitor the EGT?
It is common believe that EGT on Diesel (especially Turbo Diesel) engines that exceed 720 degrees
Celsius, may cause permanent engine component damage. This may vary slightly as different
engines are made from different alloys that have varying heat properties. The rule of thumb is to
keep EGT below the 720deg C mark. Under normal driving conditions the EGT may vary between
250 to 680 degrees C. It will increase when driving up-hill and may even pass the "safe-point 720
deg C" if you really push the motor hard.
What happens if the temperature goes much higher than 720deg C?
Although there is no immediate explosion or melting of the engine visible, to your disappointment
maybe, it shortens the life of the motor. Again, this is all relative to the periods that the engine is
exposed to extreme temperatures. Keeping your foot down while the EGT is climbing past the 750
mark may result in smoke escaping somewhere that will send you of to the bank manager soon.
EGT is a direct indication of how hard the engine is working, so when you release the accelerator
pedal the temperature decrease immediately.

[robbo0001]

The way I use exhaust temps post turbo,is as a rough indication of piston head temps....overfueling on long climbs give me an exhaust temp of about 420 degrees C max at the dump, so considerably larger temperatures at the piston head.

Overfueling is what I believe to be the primary cause of failures on Patrols (yes mine is a 2.8TD, however a lesson learnt from unfortunate ealy 3L owners can't be all bad)
Overfueling either by faulty MAF, clogged egr and intake pipework, lack of comprehensive servicing etc etc

Immediately backing off the accelerator or changing down a gear minimises waste fuel burning in the head and exhaust system.....around town and freeway running I am flat out hitting more than 200 degrees C. 110kmph on a long hillclimb temps get to around 370 degrees C
Only time I set my alarm off was a Bribie, high tide, soft sand and low range 2nd gear.....500 degrees C for about 2 seconds

[nissannewby]

Found this
Why is it necessary to monitor the EGT?
It is common believe that EGT on Diesel (especially Turbo Diesel) engines that exceed 720 degrees
Celsius, may cause permanent engine component damage. This may vary slightly as different
engines are made from different alloys that have varying heat properties. The rule of thumb is to
keep EGT below the 720deg C mark. Under normal driving conditions the EGT may vary between
250 to 680 degrees C. It will increase when driving up-hill and may even pass the "safe-point 720
deg C" if you really push the motor hard.
What happens if the temperature goes much higher than 720deg C?
Although there is no immediate explosion or melting of the engine visible, to your disappointment
maybe, it shortens the life of the motor. Again, this is all relative to the periods that the engine is
exposed to extreme temperatures. Keeping your foot down while the EGT is climbing past the 750
mark may result in smoke escaping somewhere that will send you of to the bank manager soon.
EGT is a direct indication of how hard the engine is working, so when you release the accelerator
pedal the temperature decrease immediately.

This would be the temps you would want to keep it below if your gauge is fitted pre turbo. Very good thanks :)

[garrett]

she only blows a little bit of smoke.

[Shaunous]

The way I use exhaust temps post turbo,is as a rough indication of piston head temps....overfueling on long climbs give me an exhaust temp of about 420 degrees C max at the dump, so considerably larger temperatures at the piston head.

Overfueling is what I believe to be the primary cause of failures on Patrols (yes mine is a 2.8TD, however a lesson learnt from unfortunate ealy 3L owners can't be all bad)
Overfueling either by faulty MAF, clogged egr and intake pipework, lack of comprehensive servicing etc etc

Immediately backing off the accelerator or changing down a gear minimises waste fuel burning in the head and exhaust system.....around town and freeway running I am flat out hitting more than 200 degrees C. 110kmph on a long hillclimb temps get to around 370 degrees C
Only time I set my alarm off was a Bribie, high tide, soft sand and low range 2nd gear.....500 degrees C for about 2 seconds

How big of diameter is your exhaust if your hitting 200 on highway and street driving, also how far back is the pyro. Im still running standard exhaust and boost and i'm about 350 on the flat highway and around town...

[robbo0001]

Its an unmodified Nissan exhaust system, EGT probe is in the dump pipe about 20mm down from the flange for the turbo.