Bob :
I tapped and threaded the exhaust manifold, right at the chamber where the
individual tubes meet. It actually could go almost anywhere, but the
further away from the engine, the longer it will take to get to operating
temperature. Since I was planning on replacing the manifold anyway, it was
just the easiest (no welding) place to put it. Had to clean the surface up
a little so the gasket would seat against it.
However, the run of the mill O2 sensor isn't a lot of help. They are really
only accurate right at stoichiometric, which is required for a catalytic
converter, but a TR3 almost never runs there. Maximum power is richer,
maximum fuel mileage is leaner ...
Randall
>
> 1. There was a discussion some time ago about using an oxygen sensor
> in the exhaust stream to aid in choosing the proper carb settings and
> needles for a TR3. Where and how should that sensor be mounted? At
> the tail pipe? In the exhaust manifold? Any recommendations for
> style or specs on an O2 sensor?
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