There are several "convert your car to run on water" guides available on the web. Here you can find more information about Water4Gas (aka WaterforFuel, Water4Fuel), a technology that works powering your car with a mixture of gasoline and HHO. The device follows the basic schemes as Water4Gas, splitting water into hydrogen gas and oxygen gas, also called Brown's Gas or HHO Gas, using the electrolysis process; then HHO Gas is injected directly into the air manifold intake where it will be burned with gasoline fuel to produce energy to power your engine.
The residual 80% are wasted as unburned gas, heat and vibrations. The device was designed with safety first priority. First thing to understand is there are NO safety hazards, these systems are safe. Only pure Hydrogen is dangerous. And it is dangerous to store it in high-pressure tanks.
But you do NOT generate Hydrogen, you generate HHO Gas (or Browns Gas). The presence of Oxygen and water vapor in the system makes HHO Gas very safe! Yes, HHO is a powerful combustible gas. But it's NOT like pure Hydrogen. All HHO produced gets consumed by the engine right away. This has been proven by many thousands of miles of road tests in harsh weather and road conditions. The water-to-energy converter is basically an electrolyzer or vapor injector that use very little electricity to boost the poor performance of gasoline and can be sized (the level of HHO Gas output required) for smaller or larger engines to:
Learn more about systems using this technology: