This story starts with our first prototype. I used my wife's sugar bowl and built a Wet Cell. Click here to see the original video.

This inital design as simple as it was, had its problems. Because wet cells are less efficient and prone to heat, I had problems with thermal runaway. What happens in thermal runaway is the cell gets hotter over time, and the amp draw increases, thereby causing a vicious cycle. Eventually a fuse blows and the unit stops working.

The solution is a better cell design such as a Dry Cell and the use of a Constant Current PWM. Here is the video of our first fill up and beginning of test.

Since both my wife and I use the van, in both City and Highway driving I felt it was necessary to obtain a baseline over a period of time to get an average MPG. That way we wont be accused by sceptics of driving differently with the HHO than without.

Our baseline has been recorded here. We have an overall mileage average of 16.67 Miles Per Gallon Before installing the HHO unit. Now we did this baseline test for over a year, and as you can see it is very consistent with an average MPG of 16.67. You don't need to take a year but you should do at least 2 complete fill ups before adding your HHO system.

The next step we did was add just a simple system, with no sensor mods. We ran several tests and found that adding HHO alone does not bring any gains. In fact we saw a consistent decrease of about 1-2 MPG. A video of our first fillup is here.

Our next step will be to add a Digital EFIE, and the other sensor MODs.