Correct A:F Ratio @ WOT?

[Matt Beaubien]

Bruce,

Ever hear the phrase "She ran real strong until the piston stuck/melted"?
Tuning for best performance isn't necessarily the best idea...

On a somewhat related note, I've always seen 12.5 AFR (0.85 lambda) listed
as optimal for performance (Heywood etc).  Has anyone ever experienced
different using *calibrated* sensors and steady-state readings?

Matt.


----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, September 27, 2000 8:13 PM
Subject: Re: Correct A:F Ratio @ WOT?


>
> You never,
> ever,
> tune to an AFR.
> You tune for performance and note trends, or validate corrections made
with
> a WB.   In tuning you let the engine tell you what it wants, you never try
> to force it to run where you **THINK** it should be.
> A WB is just one more tool in your box, it, in and of it's self is
nothing.
> Bruce
>
>
>
> ----- Original Message -----
> From: "Timothy J Burgess" <tjburgess at west.raytheon.com>
> To: <diy_efi at diy-efi.org>
> Sent: Thursday, September 27, 2001 6:36 PM
> Subject: Correct A:F Ratio @ WOT?
>
>
> > Now that we have the ability to determine the average A:F ratio using
the
> > WB O2 sensor, is there a typical A:F ratio to tune for @ WOT?
> > In the TPIS catalog, they have a picture of the WB sensor & meter that
> they
> > sell, and there is a marker @ 12.8:1, so I'm guessing that that would be
> > the value to tune for @ WOT.  Any recommended variance to that value
when
> > using a wet NOS system, compared to normal aspiration?
> >
> > Tim Burgess
> >
> >
>
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