The HHO dual edge 02 sensor / MAP-MAF controller works wonderfully. Just using it alone you will see a dramatic increase in fuel savings, but add the HHO Browns Gas system then your mileage is totally unbelieveable and when someone asks you what your getting for a fuel mileage they think your lying or they sit in disbelief like its hard to grasp. Without the HHO dual edge my Ford Explorer 4.0 was getting 18 miles to the gallon, with it installed  I gained a total of 28 MPG and then added an O2 spacer and gained an even 30 MPG all this without the HHO installed yet. By the way the O2 spacer is just a spark-plug spacer I bought from autozone for a buck fifty. Each time I added something new to the mix I had the Explorer dyno'ed to get realtime numbers and not just someone guessing. We then added the HHO generator and picked up an added 30 MPG giving the Ford Explorer 60 MPG total savings in fuel mileage. Then I went with AMSOIL oil products for the engine and transmission's luberication since my truck had 192,122 miles on it. So in overall I own a 1996 Ford Explorer with almost 200 thousand miles on it and I am achieving 60 MPG in it. Gasoline here is 3.80 and it takes me 60 dollars to fill my truck with 15.7 gallons which lasts me for 942 miles. Why the big three auto makers didn't do this stuff in the begining is beyond me. Having this kind of homegrown technology in play makes it easy for the little guy to even the playing field in hybrid technology.

NOTE THERE ARE A LOT OF CRITICS AND SO CALLED EXPERTS THAT CLAIM TO BE MECHANICS HAVING TO HAVE INVESTED HUGE AMOUNTS OF MONEY IN "TESTING" THIS TECHNOLOGY OUT, YET WHEN THEY ENTER INTO THIS FIELD OF TECHNOLOGY THEY DO SO NARROW MINDED AND VIEW THIS LIKE IT WAS SNAKE-OIL SALES.

Just remember expensive doesn't always mean better... Start out inexpensive and when you find out what works for you then refine it and go as expensive as you want, because you will have the money to do so in fuel savings.

Hooking a dual edge map is simply to tie into the mass-airflow-sensor using a voltmeter I connected it inline to the low voltage wire coming from the MAF / MAP . inside the air box (filter) is 4 wires this is the location of the MAF one wire from the MAF to the dual edge, one from the dual edge to the computer. And one from the dual edge to ground. (Only one wire is cut and that is the low voltage wire in the MAF that wire is blue with a red line on it) (On the dual edge map I use there is 3 wires)