Water injection ?

[Sdc77]

Does anyone already thought about it in our boat's engines ?
Water injection has been used since 1930 in ICE, to prevent detonation, increase compression, encrease torque/power and increase mileage.
It's also known to be efficient on high load engines. As we are in a good load configuration, low compression engines (the 454 is 8.13:1), and with tons of water arround us, I just wonder if somebody knows somebody who already uses water injection in an engine ?
I don't talk about water/methanol, but only water injection.

I try to find solutions to get better fuel economy on the 454 before trying to swap it for a smaller engine ...

[2500HD]

I haven't found anything on it without it being at least T.B.I. nothing for just carburated. Interesting though.

[Sdc77]

In France, people are running many agricultural tractors and few diesel cars on GEET/PANTONE full water bubblers or GVI (instantaneous vapour generator).
They get very good results, like 10 to 50% in fuel consumption reduction.

Very few tried on Gaz engines. Mostly because you need to ajust gazoline ratio to make the system efficient.

On a carbureted engine, I will need a EGT gauge and sensor, and a A/F ratio gauge + O2 sensor to know what I do and where to go. Adding just water will probably increase compression, but if I let the actual jets, I will not see interresting gas consumption difference.
On a EFI engine, the O2 sensor read more oxygen when add water, and will inject more fuel. So it will be the opposit of the desired result : More fuel consumption and emissions.

ok it can be a good DIY challenge, with many test, but I believe in it, and will try to get as many informations as I can.

Here are few links to good result systems (in french) :

http://reaction.directe1.free.fr/Merco220D/merco.htm

http://quanthomme.free.fr/qhsuite/GillierPantoneDe2004a2010/RealPMCPantone.htm