[nacelp]

> There are other running the 4bbl unit wired like mine, and it works
perfect,
> but they are n/a.

Oh, just a few guys around here trashed that set up cause it didn't run
right.

> i'm not trying to ask a specific question, more generally, how do you
> account for boost on ANY engine?

The correct way is to run a calibration that is designed for boost, like I
(and Mike) said the 1227749 ecm, and then get the right drivers.  That would
be the right way to do it.  The 749 is from the turbo syclones and allows
for up to 15 PSI of correct calibration.
Grumpy
>
> Shane
> ----- Original Message -----
> From: "nacelp" <nacelp at bright.net>
> To: <diy_efi at diy-efi.org>
> Sent: Saturday, May 20, 2000 9:46 AM
> Subject: Re:
>
>
> >
> > > the ecm is the 746 ecm..
> > > the injectors are wired in series. (front left * back right) are on
one
> > > "channel"  and (front right and back left) on the other.
> > > They don't seem to care about the voltage drop.
> >
> > Is this from testing or just cause it seems to run that is must be OK?.
> >
> > > I have diacom, so i can get MAP readings etc... just curious what BPW
> > would
> > > be good to get going..
> >
> > I don't have that particular mask's editor, but do for the 747, which
I'd
> > imagine is rather close.  Any who the 350 BPW is set at 180, and a 454's
> is
> > set at 130.    Where are your's set currently?
> >    12.5:1 AFR is the neighbor hood for N/A some S/C stuff goes richer,
to
> > use the fuel for cooling.
> >    10:1 would prolly be rich limit.
> >    Be prepared for lots of plug checks, if you don't want to melt this
> down.
> >    Have you read any of the tuning stuff.
> > Grumpy
> >    All the standard tuning warnings apply about you can melt a motor
down
> > easily with tuning errors, etc.
> > >
> > > Shane
> > > ----- Original Message -----
> > > From: <ECMnut at aol.com>
> > > To: <diy_efi at diy-efi.org>
> > > Sent: Saturday, May 20, 2000 8:43 AM
> > > Subject: Re:
> > >
> > >
> > > > Hi Shane,
> > > > you didn't mention which ECM yoy're using, but larger injectors
> > > > and a 2 bar setup might be needed.   OR.... a second computer, like
a
> > 749
> > > > with 2nd group of injectors which lie dormant until boost is
present,
> > > > then you can accurately meter the additional fuel, up to 15 psi..
> > > > You would need to obtain a tach & MAP signal at the very least..
> > > > Mike V
> > > >
> > > > > Hey guys anyone know how to calculate the base pulse width when
> > running
> > > > >  boost?
> > > > >
> > > > >  Obviously the problem is that the VE tables max out at 100%, but
> with
> > a
> > > > >  blown motor you are over 100% efficient.
> > > > >
> > > > >  I thought about using a forumla i had and just using a A/F ratio
of
> > > like
> > > > 8..
> > > > >  Does anyone know the limit of A/F ratio?
> > > > >
> > > > >  I use tunercat for tuning, and my car is a 92 firebird 355 TBI
with
> > the
> > > > 4bbl
> > > > >  holley 700cfm unit. I run a roots style blower with 6psi of
boost.
> > > > >
> > > > >  thanks,
> > > > >  Shane
> > >
> >
>
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