[Diy_efi] safc to read air /fuel

[Donnie Freichels]

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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