WB vrs NB info

[Bruce]

From: "Brian L Massey" <blocklm at juno.com>
Subject: Re: WB vrs NB info 
> On Tue, 14 Aug 2001 18:52:08 -0400 (EDT) Frank F Parker
> <fparker at umich.edu> writes:
> > Yes, That SAE paper is the one. See figure 11 which shows the 
> > pressure
> > dependance. Yet, you asked for "real world" info so I will tell you
> > for what it is worth, my personal experience from datalogging back
> > pressure( turbine inlet pressure), manifold pressure , EGT , NTK wb
> > and reg O2 output.
> OK I will do that, when it arrives from the SAE cash cow. :)
> > My own tests showed similar results thus I believe it is one of 
> > those
> > things that do not seem to matter in the real world.
> > Also did wb vs std o2 and as Bruce has reported from his tests, mine 
> > also
> > showed wb changing and std o2 steady and the reverse. Again real 
> > world,
> > not theory results.
> Thank you for the input Frank, but this is what still confuses me.
> SpeedPro and yourself found that pressure differences *don't seem to
> matter in the real world*. Then you say above, that you saw the same as
> Bruce (I assume you mean like he did, going from pre to post turbo
> placement of the sensor), with noticeable wb changes. Bruce was using the
> original diy version, and says he saw a 50mV change. 

Might try rereading things.
Bruce

I look at the curves
> from the original circuit files, and they indicate that on the rich side,
> that is very near a 1/2 afr change. The only way I know of reconciling
> these two statements is to assume that nobody thinks a 1/2 afr change
> matters in the real world. Can that be true? Tnx for any help on this.
> Recollecting what *size* of afr changes you observed would be helpful, if
> you can recall that info. Still curious about getting the *quantities*
> straight in all this. Tnx.
> Brian "real-world industrial control number cruncher" Massey

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