>Go to your local BIG newsstand and
>get a copy of "Trade-a-Plane", and browse the ads for guages and sensors...
>
>A casual perusal of an old issue in my office reveals: single CHT (Cylinder 

>head temp) guages, single EGT (exhaust gas temperature) guages, combined
>single EGT and CHT, 4 channel EGT, 4 channel CHT, 6 channel sets fro you 
fols
>with porsche conversions, and even guages with computer controlled scanners 

>that scan all the channels, remember high temperatures and sound an alarm 
if
>it goes out of a user-settable range.

Golllllll-ly! The wonders of modern technology.

And I still just watch for smoke out the back.   :^)