Exhaust temp sensors

[Mike Fahrion]

> FreshMar at aol.com wrote:
> > 
> >  Has anyone tried thermosensors on individual exhaust pipes, to monitor
> > the exhaust temps for more analytical data? They could return the optimum
> > exhaust temp (600F?),any higher could be interpreted as 'too lean'. This
> > could be another cheap engine tuning tool? Or wont it? It will not be
> > immediate or instantanious, but could show differences in each cylender,
> > providing the thermosensors are of high quality and equally accurate.
> > Mario T.
> 
> 2 cycle aircraft (ultralight) engines use this trick to get a mixture
> window between too hot (sieze up + you die) and too rich (plugs foul and
> you die)
> 

Also often done on two stroke motorcycles and snowmobiles.  Works 
very well, fast response time.  Hard on a two stroke to determine the 
melting point without doing one destructive evaluation though....

-mike