Enjoy this news segment about a fellow named Denny Klein who has a water-powered torch and a water-powered car.
From the news segment: Klein just patented his process of converting H2O to HHO, producing a gas that combines the atomic power of hydrogen with the chemical stability of water. "it turns right back to water. In fact, you can see the h20 running off the sheet metal." Klein originally designed his water-burning engine for cutting metal. He thought his invention could replace acetylene in welding factories. Then one day as he drove to his laboratory in Clearwater, he thought of another way to burn his HHO gas. "On a 100 mile trip, we use about four ounces of water." Klein says his prototype 1994 Ford Escort can travel exclusively on water [italics mine], though he currently has it rigged to run as a water and gasoline hybrid.
It seems like every 15 years or so some guy comes along and claims to have come up with a way to turn water into clean burning fuel. (Remember the "Bodine Gasoline" pill from the Beverly Hillbillies?) The thing is, any elementary school student can turn water into hydrogen and oxygen, which burns very nicely, turning back into water when it burns. But I have yet to hear of anyone who has come up with a way to turn water into hydrogen and oxygen without using more energy than you produce. If you had an electrolysis machine that produced more energy than it consumed, you could plug it into itself and have yourself a perpetual motion machine.
I couldn't find any claims one way or another on Klien's website about the efficiency of the process, but if it isn't greater than 100%, then what's the big deal? The welding device seems kind of neat, but I've read comments that dismiss these kinds of welding torches.
Link to short-on-facts and big-on-hype Fox News story video (Here's a video presentation on Klein's company site, Hytechapps.)