O2 sensor placement

[Bruce Plecan]

While using a heated one usually allows for placement about anywhere.
I did some tinkering the other day.
I mounted a second O2 about 8 feet back from the first one that was a foot
or so from the exhuast ports.

It tracked the first one just fine, but a low idle speeds there was a huge
delay on the second one.
By the time was at cruise rpm was min.

This was on a stock 305, with a single 2" exhuast system.
So anything with a huge volume exhuast system might have a problem with
expected responses from the ecm self checking for accurate feed back for
mixture change.

But again this was 9' away as measured from the port.
Bruce
Your results may vary, perform these expeiments with adult supervision yada
yada

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