EGT questions
 

ok school me here, my diesel lords. I am curious, at what temp for EGT's should i back out of the throttle. I am about to order gauges and want to know ahead of time. Is the temperature the same across the board for all powerstrokes, cummins, duramax's and other diesels, or is it motor specific? If different across the board, what is temp for each of them?

What temp should i wait to shut down the motor so i dont fry the turbo?

also where is the best place to mount the egt gauge probe on my E99 7.3 Powerstroke? I know its supposed to be PRE-turbo but where exactly?

Thanks ahead of time?

EGT's higher than 1400°F will cause premature fail of your turbo. Fail is predictable in this temperature region. We talk about pre turbo temperatures here- you can subtract 250° to 300° after the turbo.

Depending on the engine you should wait until your are back in the idle temperature range.
The turbo needs to get rid of the heat, otherwise oil will cook off and burn inside the turbo- this is the safest way to kill the turbo.

Same applies for engine start. The turbo is a supplemental part- wait a bit after oil pressure raises. Some people wait 30 seconds. I wait a minute just to be on the safe side during cold mornings.
This is called turbo awareness behaviour.

I'm not a powerstroke guy- they will chime in here and tell you about engine specific safe temperatures.

1250 is a good rule of thumb for extended amounts of time...

I usually wait til I'm under 400 to shut my rig down.

Best place to install the pyro probe is on the drivers side exhaust manifold...http://dieselmanor.com/diy/PSD3-gauge/image27-1.htm

Ups, Thank for the hint, 95powersmoker!

Corrected the number- 1250° to 1300° is a safe turbo inlet temperature.
If your running above1300°- your are running out of air because of altitude or you have a compressor problem or you are over-fueling.

The cause of this is the air-fuel ratio of 20:1 even under high boost. Additionally a greater amount of heat is rejected into the coolant and into the exhaust stream instead of doing work by moving the piston.