O2 sensors: Why not Exhaust Temp?

[Bruce Plecan]

EGT tells you how close you are to the thermal limits of your engine.   It
is a reflection of the timing and AFR (as far as tuning, goes).
   Who doesn't endorse them?.
   It's a tuning tool, same as a WB O2.
   Still the only way to see what actually going on is reading the plugs.
   Tuning is about information, the more info., the better judgement calls
can be made.
Grumpy


> It has been made quite clear why standard O2 sendors are very limited for
engine
> tuning. And "wide band" sensors are rather expensive especially for those
of us
> who use leaded fuel.   Most of my race-buddies swear by Exhaust
Temperature. But
> you guys, who are far more knowlegable, do not seem to generally endorse
the use
> of exhaust temperature for engine tuning.  Why isn't exhaust temp a good
> alternative to wide-band O2??
> Rod Wiggins


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