[StevieDB9]

after studying chemistry for three years now my input would be the same as everyone else here. yes a mixuture of oxygen and hydrogen (HHO gas) would give out a good amount of energy on combustion but as many of you have stated the problem lies with the energy required to electrolyse the water itself into hydrogen ions and hydroxy ions. Although there is something that i dont quite understand- electrolysis of water, as i have stated, gives H+ ions and OH- ions, not hydrogen and not oxygen. im not too sure but my best prediction is that you would need a HUGE amount of energy after the initial electrolysis to remove the hydrogen from the hydroxy ion, though this may be possible if the energy gain of forming H2 and O2 offsets the intial energy required, hmmm, would have to sit down with a pen a piece of paper and a custard cream to work it out. I actually down a bit of work on fuel cells about a year ago. I wish i could find my experimental results and post them up so you could see all the parameters that influence the energy output. however what i can report is that we were working on a relatively large fuel cell that delivered not much power, no where near enough for a car! If Honda spent millions (maybe billions???) developing the FCX then you can be sure that spending £100 quid on a home made system is a con.