With gas prices as they are I've been doing some research on MPG improvement for my cages. Came across this interesting site (water4gas.com). Now, I know the first thought that comes to you mind is SCAM. But, after doing some research on the site and the ideas, I've discovered it's not. So, I bought the "book" (actually, consider it more of a "membership" since you get multiple online books that are updated as new information is release, access to the forum and other useful information). VERY INTERESTING AND USEFUL READING. I recommend if you want to research some changes you can do to improve you MPG.
Anyway, to the point of this post, one of the items is a "Water Vaporizor". The concept is not new, it's just a very simple water injection system. If you are not familar with them, they've been around for a long time and were extensively used on WW2 aircraft. I basically sucks water vapor into with your air/gas mix, which cools the engine, delays the spark (higher octane), and gives you more HP overall. The problems being, they are expensive and large. The site gives a very simple, cheap, but effective solution.
The water4gas solution is a sealed quart jar (mason jar) with water in it (leaving a space at the top for air). A tube runs from an intake vacuum through thru the lid to the airspace at the top. Another tube runs from an adjustable valve (sprinkler bubbler or other such cheap device) to the bottom of the water. The adjustable valve controls the vacuum suction allowing you to adjust the amount of vapor that pulled into your intake. This allows you to adjust the vapor to your application. Below is a picture of the device.
I'm interested to know if anyone has done anything like this. I'm planning on building one of these and connecting it to my Honda Shadow (it's running really lean). Then I'd like to try the Suzuki after it's back together and running. I'll let you know how things turn out. Maybe later I'll try an auto.