O2 / Lambda Sensor Data

[Huw Scourfield]

Bruce, you're an arse ! This guy is giving the list his honest opinion on
his findings, and all you can do is be condescending. At least I can
understand what this guy is writing, most of your stuff takes 2 or 3 reads
to make sense, even the one-liners! Give the guy a break Bruce, not everyone
can read spark plugs to .1 AFR, no-one is questioning your experience or
knowledge, but be a little more understanding , eh?
    Huw
----- Original Message -----
From: Bruce Plecan <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: 26 April 2001 14:06
Subject: Re: O2 / Lambda Sensor Data


>
>
>
> > 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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