I have been toying with the idea of making a black box that would allow the
driver to control the mixture of the engine.  (If you are with the EPA,
please hit delete!)  With an O2 sensor the theory is pretty simple.  The
computer reads the voltage generated by the O2 sensor - "ideal" is 0.7V and
the computer will continuously adjust the mixture to achieve this voltage
input.  If we were to place a device between the O2 sensor and the computer
that continuously manipulates the output voltage plus or minus 0.1 to 0.5V
one could control the exhaust mixture.  This box would have a display
showing the present "real" CO percentage so the driver would know what the
current setting was.  A little above "ideal" is where maximum power occurs
and a little below "ideal" is where maximum fuel economy occurs.

At 04:39 AM 14/01/2000 PST, Lance LeBaron wrote:
>John:  Thanks for the theory.  I just love that stuff.  Why don't they run
>at lean best power instead of rich best power?  Based on my understanding of
>your explanation they could get the same power and use less fuel.  Must be
>something more here.
>
>John wrote:
>>Date:    Thu, 13 Jan 2000 23:12:14 -0600
>>From:    John Rodgers <inua@HIWAAY.NET>
>>Subject: Re: Fast German Auto chip and rockers
>>
>>Lawrence, just a few thoughts.
>>
>>I relate more to aircraft engines but I think the principles apply.
>>
>>In a piston aircraft engine, the fuel air mixture can be adjusted by the
>>pilot while
>>in flight. This allows him to control his fuel burn and power (etc)
>
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--   David Marshall -                    - Quesnel, BC, Canada   --
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