I should take Stefan's lead on this site and just comment occasionally, but I keep getting ideas about fuel sources. This one is my own, but I'm putting it out there for the Public Domain. I have no illusions of instant wealth or great fame. It's just too obvious to be seen. There's a few sites that are digging into converting regular water into Hydrogen Gas (HH) at about 15 PSI (Pounds per Square Inch), and mixing it with the separated Oxygen cell (via an electical charge from the 12 Volt system) to boost up combustion. Some are using it as an additive to gasoline, some are trying to make enough to make their engines into dual fuel vehicles. The problem with either approach is that they have to carry water, mixed with as little as 20% alcohol (helps get enough combustion to start the car) or more alcohol to prevent the water from freezing. My latest brain wave: There's an old joke about why some people have big noses, and the punchline is that Air is Free. Well, for some dumb reason, this morning, I got up thinking about that in this fuel context. Hood scoops have been around since the Aircraft engine. More Air, better combustion. Air has natural moisture (water). Car air conditioners take the moisture out of the car's air and let it drip outside the car in highly humid areas. So far, and those of you living in desert regions can speak up, the driest I've heard of in Canada is our desert regions in Southern Alberta and Saskatchewan, where the humidity gets as low as 28%. In the winter, here it gets around 45% in -50C weather (-45F). Drive faster, collect more humidity, right? Not with an adjustable 'hood scoop'. Make it sort of like the iris of your eye, adjusting its opening depending on the amount of humidity in the air, the speed or windspeed around the vehicle, and the acceleration you're putting to the engine. 1) Producing the gas isn't a problem. 2) Storing the hydrogen or Oxygen gases in a tank is too dangerous. 3) Carrying, buying or producing 100 proof alcohol will get pricier as people move to Hydrogen hybrids. My theory is that you'd have two delays. If the small reserve of Hydrogen gas you've got at the time of shutting it down (turning the car off) isn't enough to restart, the car would open the 'scoop', generate enough to 'top' it up, and shut down. The first delay would be like the old Mercedes Diesels, where you had to hold down a warmer button for the igniters (glow plug) to preheat the incoming fuel (for really cold starts). The thing is that if the fuel is 100% free (common air mass), the delay is tolerable. Besides, carjackings would go down. Help!!!! Kick these tires to death, maybe we'll get some good ideas to make it work! :confused: It's not that far off. I heard rumors that some jet engine companies are looking to convert passenger planes to Hydrogen engines. At 35,000 feet, the air is a lot thinner than here.