Exhaust Temperature for tuning

[A.DENNISON -EN320/TEL.8296]

I am interested in using exhaust temperature for optomising the 
mixture - ideally for closed loop control.  I saw this mentioned in 
the archives (which finish in May 1994 - where is the rest of it?) 
and I was wondering if anyone has some information on what 
temperatures to expect.
Have you used thermocouples attached externally to the exhaust or in 
the exhaust gas stream?  I think this idea should give more 
information than a lambda sensor and also work for leaded and 
unleaded petrol.

Comments anyone?

Andrew
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Andrew Dennison - Research Associate
The CIM Centre
Melbourne, AUSTRALIA
Phone: +61 3 214 8296
Fax:   +61 3 214 4949
WWW:   http://cim.mm.swin.edu.au/welcome.html