Turbo V6 Tuniing continued

[Jeff M]

An update on all this topic is while I had a 727 running a Turbo Grand Prix,
changes within the emulator for the chip bin were made to BPW vs EGR (with
EGR enabled, but not activating= running at the 0% location) the values did
cause changes to the INT and BLM accordingly.  ALSO, for this chip, changes
to the GL/HR did as well cause the INT and BLM to change accordingly, as did
changes to the Gm/Sec value!  So for this chip, all these values had a
direct impact on fueling the engine.

Jeff M (sneezy)

> > TK wrote:
> >
> > The seem to use the BPW vs EGR at 0% flow as the injector constant.
> > The SD's that have the injector constant use it for some other stream.
> >
> > Ludis, does the Fiero use the injector flow constant?
> >
> > When I tuned the 749 for the Fiero, I changed the %0 EGR flow.

>Ludis reply:
> There is no separate "injector constant".  The closest thing is the BPW
> vs EGR table.  This table is only used when EGR is enabled.  It is
> possible to be enabled but with 0% EGR.  When EGR is disabled, a
> separate byte in the PROM is used.  The value in this byte should match
> the 0% EGR table value.
>
> > > > The SyTy tables *do* have a setting for Gal/Hr on the injectors, but
> > > > apparently the code never references it, so its value is immaterial.
>
> This may be left over from the Fiero '7170 ECM.  This ECM has an ALDL
> mode where data for a fuel economy gauge is transmitted.  Two of the
> bytes in the data packet are constants that aren't used elsewhere in the
> PROM.  I suppose one of them is a conversion constant to convert
> cumulative injector on time to fuel consumption.
> Ludis





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