O2 / Lambda Sensor Data

[Will Reeve]

I come from an applied physics upbringing and I know 2 cars is not ideal,
but it's better than 1! As long as you keep the sensor roughly at the same
temperature for DIY use I think it's fine, it may not be absolute but it can
measure the presence of more of less fuel, even off stoichiometric. I hope
to get a thermocouple in there soon to monitor the temperature.

I wouldn't know how to read the plugs accurately and the only trouble is you
can't read the plugs while they are still in the engine :-) One advantage I
didn't mention is that the WOT map curve isn't perfectly flat. I guess it
takes into account the volume efficiency of the engine. The standard curve
shape gave a wobbly mixture across the range(read from the mixture meter),
we re-shaped the curve to give a constant mixture reading throughout the rev
range.

I'll be the first to admit I don't know the ins and outs of engine tuning.
I'm just a evening hobbyist, but the car feels better now, and hopefully
will give a few more ponies at the rolling road (at 60quid a throw I can't
afford to tune it on the rolling road itself, and besides it fun to have a
go yourself)


Will

P.S. I've searched the archives, there is lots of info and I learnt a lot,
without the people on the list I wouldn't have got to this stage, I just
thought I would put some hand on experience back.

-----Original Message-----
From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Bruce Plecan
Sent: 25 April 2001 22:31
To: diy_efi at diy-efi.org
Subject: Re: O2 / Lambda Sensor Data



2 cars is hardly enough to start making universal generalizations.
If you would care to read the archives you'll find out alot more about them.
If you repeated your experiments by reading the plugs you'd have saved more,
and been more accurate
Bruce

<snip>

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