I searched these forums but did not find much on the Gas4Free system. So, I am starting a thread. Please excuse the long post...
I am a bit of a skeptic regarding the wide spread claims of 40% to 100% mpg increases using a HHO generator in a car. But, I know enough about chemistry and engineering to understand that it just might work. Not wanting to spend a pile of cash on a pre-built set-up, I bought the Gas4Free e-books. I figured that the price was cheap enough for what I may learn.
I have three cars so I built three units per the instructions verbatim. In bench testing the first one I dutifully added the recommended 5 tablespoons of table salt to 1/2 liter distilled water (1/2 liter is all this unit will hold). As I connected it to a car battery gas just erupted from the plates. It looked like it was boiling. The elation stopped suddenly when I noticed the wires inside begin to glow. That was a few seconds before I heard a dull thump and saw a pretty bluish-orange ball of fire inside the generator. The housing contained the explosion, no bodily harm done other that a sudden adrenaline surge and the extreme urge need to urinate at the moment.
To make a long story short, after thanking God for a second chance I discovered this forum and read about NaOH. I experimented and settled on 1/16 teaspoon NaOH to 500ml water. The unit draws about 20amps and produces 1 liter of gas in about 5 minutes cold. Hot it puts out 1 liter in 4 minutes. It boils after 20 minutes.
Added a 30 amp pwm and installed it into my 1996 VW Jetta, 2.0L 5 spd just before Christmas. Now it draws about 12 amps, puts out 1 liter in 6 minutes and boils in an hour. So far I have noticed a <2.5% increase in mpg. Yawn.
My conclusions: a Gas4Free unit does not work if you follow the instructions to the letter. A lot of tweaking is needed, like plate prep, electrolyte mix, pwm, and other things that are not mentioned. But, the price for admission was worth it. As a skeptic my curiosity is piqued enough to keep dabbling with this HHO thing.
Any advice would be truly appreciated.
Red