Yeah maybe i used wrong words. Lambda 1,0 is the hottest. Then towards leaner it get cooler and toward richer albo cooler.
But leaner gets cooler because combustion produces less heat.
And richer gets cooler because of evaporation (combustion alone is still hotter but yeah it is irrelevant).
As for melting things, you can easily melt piston also
I think we agree to the most parts, but maybe use other words to present our point of view
But as for EGT i still think that in most cases this measure is overrated or even misleading.
Specially when there is single EGT probe somewhere further in the exhaust.
Only case i see to be useful is having separate sensors on all cylinders.
Then at least you can catch a cylinder in which the combustion process differs from the rest that means some trouble.
But who does that? Most people put single EGT in some random place that shows weather
Or they want ALS so much because its so "cool" (pun intended
and they panic when EGT goes crazy above 1100C or more when they fire up ALS
Then they can't understand that it is heat "outside" engine
And they want ALS that will be cooler but still "cool"
And if i am already offtopic, one more regarding conflicting expectations.
I tuned client's car from stock 250HP to 360HP. Then he was surprised that his fuel economy went down a lot
He can't understand why did this happens
He though that fuel economy will even improve after that power increase
I don't know from where people get this kind of assumptions but its similar to EGT readings and assumptions - less does not mean better
