Here’s a good video on how to make your own simple hydrogen generator. This might be a great auto project for you to tinker with.
Green Power Science has made a simple DIY Hydrogen Generator. The thought was that it would be run from the alternator in your car and the Hydrogen would be pumped into the engine for combustion. I am no expert but I think the energy used to create the gas would be much greater than the energy that would be produced when burning the g