IF your homebuild hydro boost don`t work, buy it off the shelf:
http://www.hydrogen-boost.com/tech-info.html They guaranty it saves 50% gas or you get it for free.
I live in Germany so if I would order it I sure would have a big time to give it back if it don`t works, but if I would live close to Queensburry NY and could talk to them personaly I would give it a try.
Frank