I was just discussing this with a friend last weekend.
He was familiar with what your asking about.

What I had was much simpler. A vacumm line ran to the
top of a container. Another line was open at the top
of the container, went down in the water, and terminated
in piece of plastic that diffused the air to make smaller
bubbles come out. The bubbles made that air on the top
of the container moist. Then it was pulled into the engine
via the vacuum line. I had this on a '70 Impala with a 400 cu
engine. I definitely got better gas mileage with it. No
engine mods were made. I got it at Warsharky's. It is
something that could easily be made.

Wayne D.

On Fri, 28 Apr 2006 13:17:37 GMT, Tom Gardner
wrote:

What ever happened to "Water Injection" for automotive engines? I
remember
25 years ago, I did a crude set-up using a Briggs & Stratton carb and
tank
full of water on a GM 350. It ran good and I got over 22 mpg. I Googled
around and see it used for turbo and super charger applications but
nothing
for a normally aspirated engine with EFI. It looks like it would freak
out
my Ford van's computer. The OEMs should evaluate the benefits of WI from
the factory! My Mazda RX-7 did inject coolant into the Wankle. (cool
motor!) WI increases fuel economy and effectively boosts octane.

The Ford E-350 gets about 13 city, 17 highway... not terrible, but $98
fill-ups hurt! There is a computer hook-up and you can change a bunch of
parameters but you can't dial it to 25 mpg. This seems like the perfect
vehicle for WI but Ford has made it difficult. I don't want to drive the
Honda CRX daily as it's so tiny, I feel like an ant on the highway. Any
way
to do this? Why don't we just drill the **** out of Anwr and off-shore
of
ALL coasts? Oh yea, the NIMBY mentality and the filthy rich
tree-huggers.
I loved TK poo-pooing the wind farm with in sight of his compound.