as I said.. I dont know if HHO systems are a scam or not.. what I did say is that there are no laws being broken if it did. and I do think some of your figures are off.. be that as it may, I do not have a HHO system and am not planing on buying one. just so you know that are some out therethat produce almost 4L every 60 seconds at 10 or so amps. how much actual fuel do you think an engine actually burns in 60 seconds? the problem with this whole concept is not that it cant work because it violates the first law of thermodynamics. the problem is an ineffencent electrolyzer. even wtih all your figures above, of which some I dont agree wtih as far as taking 1% of the power for the engine.. those watts are there as long as the engine is turning.. is there more drag on the engine to produce 120 wats or 0 watts? coils still pass over magnets no matter what.. as long as the engine is turning. again.. weather HHo systems work or not I dont know. and Im not saying they do. i just dont agree with invoking the first law and saying see it cant work. because the first law is about perpecual motion of which this is clearly not.