[Fwd: RE: Propane/water/alcohol injection and O2 sensors]

[Greg Hermann]

>There is indeed more or less power to be made depending on
>where the energy for expansion is taken from. If it is all
>from the air as in the intercooler scenario you have a big
>gain. If you spray it on the inlet manifold walls then
>that's where the energy will come from. It's an air thing.
>

Not so much the energy for "expansion" as the energy for the "latent heat
of vaporization".

Which, just as with H2O injection, is BEST taken from some of the work
which is otherwise done during the compression stroke! (Internal coolant
effect)

Greg


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