O2 / Lambda Sensor Data

[Bruce Plecan]

> I come from an applied physics upbringing and I know 2 cars is not ideal,
> but it's better than 1!

I fail to see where that is an excuse for giving out poor info..

 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.

Might read further and see that backpressure can also play a role.
Also, not all sensors switch over at .5v.

> 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.

And you want to give advise?.

> 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)

And remember, Buttometer readings are meaningless.
Bruce
>
>
> 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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