I've messed around with HHO a bit,
built built a nice multi chambered tank by using various diameter stainless pipe and platinum sheet,
It doesn't work all that well for offroading, too much jostling around of the tank and you end up ingesting some of the water because the rough roads will slosh it up onto the output tube and send it to your intake. not devastating, not not particularly useful.
That and for cold climates, the water (or water blend) you use will freeze, rendering the entire thing one solid state brick and generating nothing.
My best results were with my old (2000) Hyundai Elantra, Fuel Injected 2,0 DOHC 4 Cylinder and the 5 Speed Trans.
average on a two hour drive on interstate at 65 was close to 50 mpg, but it was a fluke, everything was just right and it all just clicked.
I could get 39 mpg out of the car in it's stock condition without adding hundreds of dollars in parts and countless hours of tinkering and adjusting and tuning and...the price of gasoline is cheap by comparison.
I stripped everything off the car when I sold it. Never bothered to replicate it again.
Not sure I am wanting to. todays cars get so much better efficiency. and like I will state below, I just do not drive far enough or often enough to justify the expense. (or the headache)
I will say this,
you CANNOT just hook up the 12 volt leads to your "Generator Tank" and expect to have enough free hydrogen to make things work. (If any at all)
you MUST have a "Cracking Circuit" that modifies the electrical pulse to match the right frequency at the right voltage and amperage to effectively liberate the hydrogen and oxygen. If you are not into electronics, there are kits out there that have everything pre-built, but you are still going to have to tinker, and this stuff is unreasonably expensive.
there is a whole lot of bad information out there.
the proper way to do things is out there, but you have to dig for it.
is it worth it...
for the amount of driving I do these days, I do not care about adding on stuff.
maybe its the age settling in, but I just do not want to have to fiddle around with fussy bits anymore, I like to just twist the key and go on merrily down the road.
the answer to "Does HHO Work?"
is yes...but not as simply as you might think.
If all one needs is a shot of power, try propane injection, oxygen injection, or good old fashioned nitrous oxide.
Otherwise, for steady state constant gentle power, just build up your engine PROPERLY.
remember that cooling is your friend, properly operating your engine and transmission lead to a long and happy life. (for the vehicle and occupants).
sorry if i've burst any bubbles, but I know the headaches I went through trying to sort out HHO.
for me, it simply wasn't worth it.
your results may vary.
But I had to say something just so half the board didn't go nuts over the idea of HHO.
It, (like any obsessive hobby) can get expensive and waste large portions of your life.
I'm not saying do not try it, just don't go into it with the pie in the sky idealism of how its going to be the end all of fuel deliverance.
Like I said, it does work, but not under all conditions, and not as easily as (most of the sellers out there would have) you think .
I think it would prove most useful on a stationary setup.
Like a generator, log splitter, irrigation pump.
throttling over rough terrain, or in the cold northern climes isn't its environment...not yet at least.
Hope I've not killed any dreams out there,
But one should go in armed with the facts before undertaking such a thing.
having said all that...
Go Forth and Tinker!
(No, I will not field any questions pertaining to HHO, I've suffered enough)