> I also welded a bung into the exhaust of my 1982 air cooled Federal Westy.
> I installed one the of the Bosch O2 sensors sold by Bus Depot.  My
> readings are pretty solid above 30mph.  Anything below 30mph and the
> sensor is not warm enough to produce a signal.  My readings start at about
> 0.6V at 30 mph and steadily increase to 0.9V at 70mph.  I am very
> interested in comparing these numbers to another Federal van.

Maybe Ken Lewis will pipe up, but as I remember he did the
same with his Porsche 356 and used the output to adjust his
carbs.  Check his pages at
http://neksiwel.20m.com/

BTW--his O2 readout display is the neatest toy you can
install in your (O2-equipped) Vanagon, IMHO.  The dancing
LEDs will mesmerize you!

Richard
Boulder