turbo scaling

Bruce nacelp at bright.net
Mon Jul 30 18:03:27 GMT 2001


I said for some code.
That's why I asked what code
Bruce

From: "Programmer" <nwester at eidnet.org>
Subject: Re: turbo scaling
> Really--for any code, Bruce. I did a '7747 with no FMU and an underhood
> supercharger. Worked quite well with the BBC injectors with a lot of
> re-scaling.
> The boost was only 4.5 PSI at WOT, so it wasn't a big deal...but, the
stock
> injectors
> just couldn't keep up. Just kinda curious if it's the same
> issue throughout. Have also tuned underhood centrifugal chargers with
FMU's
> with
> mixed results...kinda hard to tune fuel when the customer changes your
> fueling with
> a turn of a screw...
> Lyndon

> From: Bruce nacelp at bright.net
> Subject: Re: turbo scaling
> > For what code?.
> > Some do a Baro calc at start up, and then again as you enter PE.
> > You also lose lots of resolution.  Would be neater to expand the tables
to
> > match.
> > The syclone guys have a 3 bar calibration.  I saw a 2 bar 808 but all
they
> > did was disable the diagnostic flags.  So **it** can be done.
> > Bruce
> >
> > From: "Programmer" <nwester at eidnet.org>
> > Subject: turbo scaling
> >
> > > I'm no software guru, but is the code as simple/complex as this ?
> > > 1. Rescale the MAP table to 200 kPa (probably the toughest).
> > > 2. Change trouble code "MAP" settings,
> > > 3. Rescale fuel tables to match high MAP (again--a tougher item)
> > > 4. Rescale timing table for high boost MAP ?? Pull timing for upper VE
> > table
> > > ?
> > > Lyndon


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