Compression Ignition Addict
Join Date: Aug 2007
Location: Buffalo, NY
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On my last truck, I had both pre and post turbo installations, so I think I can answer this question with FACTS.
The post turbo reading can be as much as 500 degrees off under full throttle.
The post unit was about as useless and inaccurate as it can get.
While under consistant speed and throttle, the post temps were usually 200 degrees behind, but it does not reflect that difference under throttle spikes.
As far as burning off, maybe a big rig with a few hundred thousand miles may experience probe failure with a stainless unit, I doubt that any pick up truck will have the same hard use. There are inconel alloy probes available which will hold up many times better than stainless, and stainless is pretty darn good!
Personally, I've never had a problem..