hydrogen injection can work. The problem is on a vehicle that runs closed loop fuel injection will not run its self lean and will not net any real fuel savings. So people put in o2 sensor simulators to lean out the fuel that is being supplemented by the hydrogen. Now the issue with these brown gas generators in they do not produce consistent volumes of gas since they have several variables like resistance in water, heat, voltage and others. So if you can not control or easily measure how much brown gas you are injecting. How can you safely reduce the amount of fuel from your cars fuel system? IMO you cant. Think about it your car runs 14.7:1 in closed loop so in order to save 10% fuel you would have to run your car at 16.7:1 and that is nearing the point of damage. 20% 17.64:1 it will damage your engine with out enough extra fuel. The only way I could see this being able to add real savings and do it safely would be injecting compressed hydrogen just like many diesel owners do with propane. But who wants to carry around a tank of compressed hydrogen in their car?
