O2 / Lambda Sensor Data

[Shirley, Mark R]

Don't take it personal, Bruce is one of the grouchier guys on the list.

> -----Original Message-----
> From: David Gregory [mailto:dcg1174 at tntech.edu]
> Sent: Thursday, April 26, 2001 10:00 AM
> To: diy_efi at diy-efi.org
> Subject: RE: O2 / Lambda Sensor Data
> 
> 
> gee, why don't you be a dick?
> 
> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Bruce Plecan
> Sent: Thursday, April 26, 2001 8:06 AM
> To: diy_efi at diy-efi.org
> 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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> >
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