[Diy_efi] safc to read air /fuel

[Joseph Obernberger]

Hi,
    I assume you mean a/f ratio.  There is the 'blue-wire mod' where you connect
the blue wire to the O2 sensor.  It will then read between 0 and 1 volt - 1 volt
being rich, and 0 being very lean.  Good luck!

                                                                    joeo

Donnie Freichels wrote:

> has any one tried using the apexi safc to read the a/r ratio? It has an
> input from 0 to 5v and has a few different displays it also datalogs for up
> to a min. i think.
>
> >From: bearbvd at mindspring.com (Greg Hermann)
> >Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
> >To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
> >Subject: Re: [Diy_efi] RE: Throttling intake air
> >Date: Fri, 17 Jan 2003 07:51:28 -0700
> >
> >At 9:55 AM 1/17/03, Bill Washington wrote:
> > >3. Has anyone considered a variable flow restrictor in the exhaust
> > >immediately after the turbine instead of a wastegate?  Here backpressure
> > >through the system would reduce intake airflow and consequently fuel
> > >delivery. This would be a little like the jacobs brakes used on trucks,
> > >only in a different location and progressive.
> >
> >1. You need to learn a little more about how a Jake brake functions.
> >
> >2. For a restriction downstream of the turbocharger turbine, mebbe a VATN
> >compound turbine, geared to the crank via a fluuid coupling--- Holset is
> >already doing exactly this, in conjunction with Scania, except for the
> >Variable nozzle part. Cummins has played with it too (the compound turbine
> >adds 50 Hp to an engine which otherwise makes 400 Hp. Mack uses a simlar
> >compound turbine to drive a fan which pulls the cooling air over the air to
> >air IC.
> >
> >Greg
> >
> >
> >
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