water into efi system before injectors.

[Mike (Perth, Western Australia)]

At 08:20 PM 13/3/2000 -0700, you wrote:

>No papers I know of, but have done the math/thermo. Comes out to about 75
>or 80% of mass flow rate of stoich fuel mix fuel flow in water will get you
>saturated vapor conditions at TDC when it's time for the spark. Any more
>than this, and you lose power.

mmm Can you clarify - for say 100ml of fuel flow per minute you want
75 to 85 ml water flow ?

>Same old saw--gotta have the H2O atomized, but not vaporized until the
>intake closes, or you lose because water vapor (molecular weight = 18)
>displaces a lot of air (avg. molecular weight =29), thus losing you power.

Probably due to heat difference between liquid water and gaseous water
at 100deg C transition, ie Latent heat of vaporisation - can swallow
large amount of heat...

>Ideal amount of water increases with increasing effective compression ratio.

Has anyone published any actual curves, water flow vs power vs CR vs Fuel
or anything even similar ?

Rgds

:) mike

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