Originally Posted by mudsnow
Would you suggest to the jeepers who install additional modules to pay special attention to EGTs?
I've read somewhere that this is really the tricky part of the game (if the rail and/or overboost pressure is kept within the manufacturer limit), since EGTs greater than, let's say, 700 Celsius could lead to excessive thermal stress and wear.
But I don't find on the internet THE definitive guide to install an aftermarket EGT sensor and gauge: some say to measure the temp. as close as possible to the exhaust manifolds before the turbine, others suggest that it's safer to put the sensor just after the turbine, in order to reduce the risk of a catastrophic turbocharger failure in case of sensor break.
Yes the EGTs are important to monitor on a diesel. I recommend it when fitting a chip for more power.
700 may be ok for short intervals but prolonged high temps would be problematic in the least.
I wrote an article about this some years back.
You can read it here: Why are EGTs Important? | Chip Tuning Australia
The reason we all fit after the turbo is because, as you say, a tip failure is not going to stuff the turbo. You will find all manufacturers fit there. Secondly, we actually are not interested in the peak temps but THE DIFFERENCE between stock and then temps WITH Chip.
IE the manufacturer has done the testing and knows the temps in standard trim are fine. We just use the EGT Controller to limit what would be the temp after fitting a Performance Chip.
For race engine builders they place the probe right after the valve (or as close as possible to the valve) because they are interested in how hot things in the combustion cylinder is getting. And they will do this for EACH cylinder.