homemade air/fuel gauge...

[JShadzi at aol.com]

Just to throw it out there cause I think its a great product for a great price, but check out www.tuneyourengine.com , WB unit, comes with sensor, bung, and handheld controller, with software for datalogging, etc, all for $350, no soldering required.

Javad

>Take a look at http://www.diy-wb.com/info.htm .  It uses a two cell
>sensor.  Build it and tell us if it works ok.  They says it will work
>from 20:1 to 10:1.
>
>
>--- JShadzi at aol.com wrote:
>> Ti, I agree, an O2 gauge is a very good tuning device, not as
>> accurate as say a WB sensor, but any standard O2 will give you a very
>> accurate reference to Stoich.  Typically I can get a/f ratio on an
>> 034efi unit to within 5% of ideal using a standard O2, then fine tune
>> it up with a WB, especially WOT where 12:1 to 13:1 mixtures are not
>> as accurate with a standard O2.
>>
>> Luke, Ti is right, you can get a nice O2 gauge from Summit for under
>> $30, why use a multimeter?  Multimeters don't react quickly enough to
>> the rapidly changing voltage signal, its just not going to give you
>> any useful information, even if its free.
>>
>> HTH,
>> Javad
>> >
>> >The white wires are for the heating element.  The black wire is
>> >the output of the sensor.  The ground is the engine block.
>> >Having said that, using a multimeter as a fuel/air gauge during
>> >closed loop operation is going to be useless.  The signal varies
>> >much too fast for most meters to register a correct reading.
>> >
>> >-Ti
>> >2003 A4 1.8T multitronic
>> >2001 S4 biturbo 6-sp
>> >1984 5000S turbo
>> >1980 4000 2.0 5-sp
>> >--
>> >    ///  Ti Kan                Vorsprung durch Technik
>> >   ///   AMB Laboratories, Sunnyvale, CA. USA
>> >  ///    ti at amb.org
>> > //////  http://www.amb.org/ti/
>> >///
>> >
>> >
>
>
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