Received this from a tuner recently, when I told him my EGT went up to 930?C, probe is post cilinder:
Gert,
If the engine is going to run continuously at WOT like in a race boat, then 930 degrees is the safe maximum if the engine has inconal valves. As your car is a road car that touches these temp for brief periods they are ok. It is common for a drag race engine to record over 1000 degrees.
Under the turbo is much hotter when you run rich mixtures, as the unburnt fuel burns outside the engine, in the turbo collector. Most people do not know this and they will often say "It makes no sense...I make the engine richer and the exhaust temp goes up". Any time I hear this I know exactly where they have put the probe.
The problem with people with EGT on their engines is, they are constantly watching the gauge and worrying, instead of enjoying driving their car. Most of the worry come from all the misinformation on the Internet.
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