Propane EFI - part duece

[Bruce Plecan]

> Question:?  Has anyone piggy backed an additional injector to a GM
injector?

Yes, What comination do you need to know about

> Dry Propane has no latent heat of vaporization in the intake charge
stream.  I
> am thinking of adding water injection - metered proportional to the
propane at
> part thru full throttle.
> Since the hacked GM ECU ( maybe - part first working ) is setting up fuel
> flow, if it were possible to use the pulse output to the TBI like
injectors as
> an input, and when a certain pulse width was exceeded, start metering the
> water in proportion to the fuel the rest of the way up.

Jus use a MAP or TPS value, would be my suggestion.

> A peculiarity ( from several sources ) of propane is that as the temp,
> pressure, rpm goes up, the flame speed and temp rise faster than that of
> gasoline and thus the spark advance needed and detonation resistance goes
down
> fast.
> Because vapor propane has no heat of vaporization in the charge, the
effects
> of moderate amounts of water injection should be very beneficial without
as
> much of the side effects of combustion cooling that water has with
gasoline.
> Simply using a small injector with a pulse former driven of the main
injectors
> seems as the easiest way to get proportioned to load water as I can thimk
of.

ATR, does that with their 7th injector, from what it looks like to me

> Or is this totally out in left field.
Heheheh   Does it matter
Grumpy

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