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Portable CO meter
In message <email@example.com> Tony Lum writes:
> Phil, this may be rather extreme and requires modification of your exhaust
> system. I read a article in EC mag about how Techtonics Tuning designed a
> fuel enrichment device triggered by the WOT and temp sensor. They were
> able to measure fuel mixture by way of a "high" speed OXY sensor. I
> realize that your engine doesn't have one, but have you considered adding
> one? I read its quite easy to obtain the fitment, cut a hole in your
> exhaust pipe, weld in the mount, and screw in the sensor. You can use the
> 3 wire kind to make sure it warms up fast. Now with this sensor in place,
> you can hook up all types of instrumentation. How about a laptop with a
> A-D coverter pcmcard and chart the output voltage vrs rpm etc, etc.
Thought about that.
As it happens, I have a redundant (but reliable and well-built) AST
Premium PowerExec 386SX25 laptop with two PCMCIA slots.
I've looked at a number of packages. Farnell do an attractive one -
an 11-channel A/D converter that plugs into the parallel port and
uses cheap, nasty and probably very efficient DOS software.
Experimentation is suspended while I get the car through its annual
inspection. It needs a new centre exhaust section, so I'm putting in
a piece of cheap crap (rather than the real Audi part) so I can do
some cutting and banging after the inspection is passed without
damaging anything expensive. But one reason for the 'portability'
requirement is that I want to make measurements on a reasonable sample
of cars - not just my own.
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