WB Instruments

[Bob Wooten]

I would imagine that for us that are going to use it as a reference for
tuning something that does not have any individual cyl tuning ability, a
nice long (relatively speaking) filter would really be a good thing.  this
way we have an average line that we can look @ & use as a greater than, less
than kind of thing.

But on the other hand, for those of us picky @ times types, this would be a
fantastic thing to have w/a short filter would be VERY interesting &
insightful.  I bet that IF, we can distinguish the noise from the signal,
that being able to interpret the data would be a LOT of interesting stuff.

As I see it, the hard part for us novices, would be to be able to
distinguish the noise from the signal, & then interpret the data from that.

COOL, ntl
BW

-----Original Message-----
From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Bruce
Sent: Thursday, July 12, 2001 8:44 PM
To: diy_efi at diy-efi.org
Subject: Re: WB Instruments




I beleive I was talking about a peek detector so as to be able to ignore the
*inbetween pulse* areas of the O2s readings.   Depending on the display
type, 50% of the info displayed is showing in between areas of the exhaust
pulses,  my area of concern is reading what the AFR is indicated by the
pulses.  Hope that clears up what I was saying
Yes, a GN that runs well.
Bruce

From: "Brian L Massey" <blocklm at juno.com>
Subject: Re: WB Instruments
> BobR,
> I do understand that if the cylinders are not quite the same, that will
> show up, just like misfire would show up. That wasn't really my question.
> Sorry I poorly stated.

> Just after I came on the list, I believe it waws bruceP said that without
> filtering, the WB o2 output wasn't much use because of all the
> variations. He even mentioned wanting a "peek detector" or something to
> get at the data you would want. I assumed an old-timer would have their
> car in good tune (Bruce you owns a well-tuned GN right?), I figured he
> was saying that even with the cylinders all about the same mix, there was
> still lots of noise or other stuff  in the signal. My question really is,
> where is that coming from if not afr variations or dilution?? It sounded
> to me like you fellas were trying to pull the actual afr out of a noisy
> signal. And if the sensor is indicating what it's seeing, that afr
> "noise" has to come from somewhere? The where is what I was asking about.
> I just naturally assumed you were talking about the actual afr showing up
> as pulses in the output, especially when Bruce mentioned the peek
> detector.
>
> Are you saying what I was saying, that if all the cylinders are balanced
> in afr, there would be a simple flat line to look at? I know thats
> *supposes*, but I'm trying to understand just what these sensors see. And
> Bruce maybe you can explain the thing about the peek detector? Tnx.
>
> Brian
>
>
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