Originally Posted by 
pfillery
				 
			I have a large folder full of different methods of setting up hydrogen power in vehicles. I see little if any evidence that it is a total waste of time, there is some credibility to it.
 
Most setups do not claim to be able to run the car completely from hydrogen, as stated and agreed to, this takes up more energy than it puts out. However in the same way that a diesel gas system suplements the fuel source with lpg, the hydrogen setups suplement the fuel. According to most of them, you tune the mixture of the carby down so that the hydrogen takes up the slack. In electronic vehicles there are mods to the sensors to compensate. So leaner mixture equals less fuel usage. In many of the plans the power drain is limited because they pulse the current electronically. The main disadvantages seem to be that it is not really a pure water powered setup (often called hydroxy gas because it needs an alkaline substance in the water to make the reaction work), every so often depending on useage you need to change the plates and wires in the generator itself because even though they are stainless steel they corrode away.
 
I would be willing to give it a try one day. Even a straight water vapour injector is supposed to drop fuel usage.