big inch SBC EFI intake mainfold

[Bruce Plecan]

> Actually one that sticks out like a sore thumb is the fact that synching
> up an SEFI controller does nothing for the engine except at very low
> rpms...and then most of the gains are not in driveability, but
> emissions.  His feeling is that even at low rpms that the 'puddle' of
> fuel on the intake valve would never really puddle since the valve is so
> hot and at low rpms, there is not enough fuel there to matter anyway.

I can totally see that, but then the guestion is why do the SEFI buicks run
so bad when 180d out on the cam sensor?.
Grumpy

> Then the conversation turned to SEFI vs batch and the SEFI advantages.
> According to him, there is no horsepower advantage at all to a SEFI
> system (which I have also heard from other people).  The advantages are
> all in starting and low speed engine operations (emissions, economy,
> etc).
>
> Later dates.
>
> > Sometimes, it's a matter of packaging that leads to compromise.
> > The greater distance gets to the atomization, evaporization, issues all
over
> > again (which it is IMHO).
> > Any other comments of his ya remember?.
> > Grumpy
> >
> > > Not that I have an expert opinion here, but a long time ago, John
Meaney
> > > told me that the best location was as high in the runner as you can
get
> > > (without spraying into the plenum) and mounting the injector normal to
> > > the runner.  Of course he was talking about racing engines, but that
was
> > > his opinion about 8 years ago...not sure if it has changed since.
> --
> Scott Knight  mailto:scott at scottknight.com
> http://www.scottknight.com/ IRC:SS396man
> '00 White Grand Prix GTP
> '95 Black Impala SS
> '94 Ducati 900SS CR
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