Junkyard turbo ecms

[Bruce]

An injector has a min "on" time that it needs, on most of you large
injectors (TPI) you need to had a min on of about 1 msec.  or the idle will
be just too rich.   The injector might try to run at the short time on
periods, but may get erratic.

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.  What would be neat is a
injector that could work at say 25% DC at WOT and supply enough fuel for max
HP, and also be controllable for a good idle.
Bruce





From: "Chris Waltham" <chris at harvestroad.com>
Subject: Re: Junkyard turbo ecms
> >SEFI only helps with big injectors, and having a reasonable idle, or when
> >really worried about CAFE numbers.   Second you exceed about 25% DC on
the
> >injectors doesn't matter what firing strategy you're using.
> >Bruce
> Could you just clarify this for me? I don't have a real good understanding
of
> this, so I thought if I voice my thoughts you might be able to correct
me..
> Is the firing strategy irrelevant at duty cycles over 25% because, if
> the injectors are holding open for that long, they'll eventually overlap
and
> more than one injector will be firing at a time?
> TIA and HAND,
> Chris

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