Junkyard turbo ecms

[Bernd Felsche]

David Hunt tapped away at the keyboard with:

> Does that have an effect on emissions?

Mainly HC reduction.

Road-going vehicle port injection systems _try_ not to inject while
the inlet valve is open - even those which batch-fire. I'm not sure
when they do inject if they have to overlap with an open inlet
valve. I suppose it's easiest to keep injecting as the valve opens
and through the maximum airflow range and stop before BDC to allow
for vapourisation.

Sequential injection therefore has the benefit of longer injection
time with reduced HC emissions.

> ----- Original Message -----
> From: "Bruce" <nacelp at bright.net>
> >
> > Once your at about 25% the injector with a SEFI the intake valve
> > is already open as long or close to the injector pulse width, so
> > the fuel is spraying at an open valve anyway.  If the fuel is
> > sprayed when the valve is close that promotes vaporization, and
> > better burning.


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