Well, I'm back for the moment. I'd left this site because I don't have the time to argue with uneducatable morons, and it seems there were a few trolling about on the HHO issue. I've spent the last few months studying HHO usage and building generators, experimenting on the car and truck with them.
Thus far: The 02' Silverado 5.3 went from it's average 16 to a temporary 19.2 before the 'pooter took over. I put extenders on the o2 sensors to no effect. Haven't driven it much without the trailer, so haven't been able to do anything more, but MAP enhancers I built will go on next. (because they're cheap and easy to make)
The '93 Toy Paseo had it's very best at 30 mpg when hypermiling with nothing added to it. Did that several times. Built a series unit that runs .9L/min @ 10-12 amps, ran the gas thru a copper tube across the exhaust manifold and got 36 mpg.
The gas heater didn't add mileage, but restored a little power loss that the HHO seemed to create for some reason. Most say they feel more power, but I sort of think that's imagination. I wrote an article called "Subconscious Hypermiling", using a term I think came from this website; I probably should put it here. My vehicles always are tuned, with good oil, etc., so there's not anything to change or skew results there. I think the guys who notice their cars running smoooother...had something off to begin with; my stuff was always smooth, or I'd park it and FIX it.
Biggest lesson to date was to shift to series cells. There is nothing else out there. Low amps, low heat, high output - what's to argue?
Next biggest lessons are electronics. Ebay may be cheap, but don't expect service when you wire it wrong or it dies.
Ultimate lesson: Don't attempt HHO enhancement if you don't have patience, and the willingness to see it through. MOST computer controlled fuel systems will have to have the inputs enhanced a bit to make the ECU leave things alone. Suggested monitoring devices are:
Amp gauge: tells you when water is low or a problem with unit, or overheat.
Clear bubbler: shows your production at a glance
A/F gauge: keeps you from overleaning the engine and frying things.
Anyone not using a bubbler is an idiot. Anyone not using a blowout plug needs to do some reading. Anyone not using an ammeter is flying blind.
A neighbor who's been into this for a couple years (Hydrodine) had a pop in the garage and put pieces through the sheetrock wall. Examples like this are abundant, but were not at first. Live and learn...when you get your hearing back.
Linear Mode
