Projection

[bamcknig at postoffice.syspac.com]

Mike

Not sure exactly what the path of the exhaust gas would be.
So it would seem that the main consideration would be getting enough 
exhaust gas over the sensor to reach its operating temp (700 deg +F).
The temp could be obtained with a three wire sensor, but you would 
still need enough flow to be representative of engine performance.

Bob McKnight 
Phx AZ