Longbob

My search didn't turn up the answers I was looking for, but I was curious at how much difference in temperature there is when you measure pre vs. post turbo for the EGT's.

Mine is pre turbo and it takes for ever to get down to 350 degrees. I end up shutting down around 400 degrees so I don't run out of diesel waiting all the time. What is your target temperature to shut down?

nitrousn

Pre v/s post can be 200 to 400 degrees in difference.

I shut mine down most of the time right away and it is about 350. If i had been working it i let it cool down a minute or so.

Longbob

Are you pre or post? Thanks!

nitrousn

I am pre turbo, the only true way to go.

WDS

Where will the temp be highest, pre or post turbo? What would be considered the high limit difference between the two locations?

JAX

I understand that the temp is higher pre turbo due to the probe being closer to the actual combustion chambers in the head. This is why everyone puts the probe pre turbo because the reading is more accurate than post turbo. I have also come to understand that you should give yourself a window of 500-700 degrees higher temp if you are running a post turbo probe. 500-700 is a "safe" measurement for the difference in temperatures. If I am wrong, someone will chime in.

nitrousn

Jax, 500 to 700 is high. I believe 200 to 400 is more accurate.

Sea Bass

Mine is set up post turbo now (changing soon) and I won't sustain anything over 950. I still 1100+ quite often but I've always heard 950 is safe. At cruising speeds and shutdown the difference between post and pre aren't as big as WOT. 200-400 is about right.

Rhino

On a WOT run I would see 550-600 degrees in difference between the pre/post turbo probes.

While cruising the difference would be 200-300 degrees.