12:1 is the FMU ratio (fuel management unit) and as with 8:1...
i cant say what the exact ratio of air/fuel is its just showing rich...
the 12:1 is 12PSI of fuel per 1# of boost... and same goes with the 8:1...
sorry for the confusion....
___________________
Tim Berry
Chesapeake, VA
97 CC, 4x2, auto, 318
Best 1/4: 14.10@96.8
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
----- Original Message -----
From: "Bob Tom" <tigers@bserv.com>
To: <dakota-truck@buffnet.net>
Sent: Friday, August 18, 2000 9:49 AM
Subject: Re: DML: Supercharger Guru's (or anyone else thats a guru with
tuning an engine)
> Tim
>
> At 09:08 AM 8/18/00 -0400, you wrote:
> >FMU dosent have anything to do with the O2 sensor... it just increases
the
> >fuel pressure when it detects boost.... (FMU = Fuel Management Unit)
> >My Air/Fuel meter is hooked to the PCM (as it said to connect it)
>
> Your posts included afr of 12:1 and 8:1 under varying conditions.
> I asked about wide-band O2 sensor because, under the OE setup,
> it is not possible to tell what the exact afr is ... with the OE O2
> sensor and afr autometer gauge tapped into the wire running to PCM
> from the O2 sensor, all anyone will get is stoich, rich or lean readings
> but not how rich or lean. Maybe I missing something here?
>
> Bob
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