multiple O2 sensors

[Greg Hermann]

>Has anyone used multiple (1 per clinder) O2 sensors to monitor individual
>cylinder conditions?  In my airplane I use an egt with a sensor in each pipe
>with a simple selector switch but it is all analog low tech.
>
>Any thoughts on the smallest/cheapest way to go?

Indy car guys have been talking about using one WBO2 sensor per cylinder,
but hardly a cheap approach!

Greg
>
>Thanks.