EFI fuel pump and water.

[Bruce Plecan]

> The misting principle is similar to an air-brush. That doesn't
> create a super-fine fog, but it's a much finer mist than with a
> low-pressure water jet running at similar pressure. An air-brush
> uses high _velocity_ to achieve the effect. The pressure of the gas
> in that case is quite low.  Often less than 100kPa (relative).

But were getting away from intrducing some of the water pre I/C for cooling
the intake charge when it's at it's hottest.

> > > It should be easy enough to modulate the amount of water by
> > > restricting its flow using a low-pressure valve in the water suction
> > > line. Just keep the bleed air bleeding.
> > > That removes the need to use a high-pressure water pump to achieve
> > > the fine mist.
> > For all the custom machining, fab work, the pump is tons easier, and
DIYer
> > friendly.
> > Please note the wording.

> The low-pressure valve for the water feed can be made from readily
> available materials. Stainless feed-tube, polymer valve body and
> piston with electro-magnetic actuation. If you only need the "WI"
> for a short time and/or low duty cycle, then a gas-bottle could be
> used as the source of gas; a commercially-available solenoid valve
> on the bottle would also do the trick.

Do you have a particular water type solenoid in mind?.  ie part no.?.
Would be nice to PWM

> >  Tricky bit would be to ensure that you have enough
> > > pressure differential between the bled-air and the manifold for it
> > > to work. A secondary-air pump may be useful to ensure a higher
> > > pressure, if it'll cope with the high inlet temperature (I don't
> > > know the characteristics of such pumps to any detail.)
> > This is now, ME overkill, IMHO.
> Fair enough. But if, as you say the I/C drops only a couple of psi,
> then you do need the pressure differential above manifold to create
> the high-velocity jet.

For this system to work would have to take the air for the sec pump down
stream of MAF,  which isn't too bad, just more plumbing

> > > The hotter air would also assist in creating water vapour to reduce
> > > the likelihood of water erosion around critical areas such as
> > > valves.
> > What hotter air, and what valves.

> The air bled from the turbo output ahead of the I/C is hotter and
> the (intake) valves in the cylinders. Again, sorry for not making that
clear.
> > > If you're metering air flow, then you'd need to bleed the air
> > > downstream of the meter.
> > > That's just an idea. It may work. Feel free to jump in and knock the
> > > idea on the head.
> > > Bernd Felsche - Innovative Reckoning
> >
> > Grumpy
> > LGICOCSH,HQT
>
> --
> Bernd Felsche - Innovative Reckoning
> Perth, Western Australia
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