My HHO thingy didnt give me any FE gains (A-B-A testing). From my other car forum:
*update 2/12/2010*
Installed this nice little MPG gauge courtesy of Ecomodder.com
MPGuino - EcoModder
to give me instantaneous results. It measures instant mpgs, trip mpg, and tank mpg. For the sake of this test, I will use the trip mpg reading on each direction, then reset.
To measure ambient temperature, i used this tool:
http://www.harborfreight.com/cpi/cta...emnumber=93983
To keep driving style consistent, i used a vacuum gauge to show how hard the engine is working. For the sake of this test, i accelerated using 15in and shifted gears at 3500rpm until i reached 50mph, then set the cruise control.
http://www.harborfreight.com/cpi/cta...emnumber=98482
Location: found an empty 1.5mile long stretch of backroad highway so there was no traffic interference. The first direction was a slight uphill grade (lower number), the returning direction was mostly a downhill coast (higher number). And then i took the average of the two.
Here are the results:
Time of day 12:30pm - 1:30 pm
Ambient Temperature 75*F
A = all stock
B = Electrolyzer only
A = all stock
A1 - 22.56mpg - 55.94mpg = 39.25 (avg)
A2 - 22.46mpg - 54.45mpg = 38.45 (avg)
A3 - 21.78mpg - 54.83mpg = 38.30 (avg)
B1 - 22.64mpg - 55.55mpg = 39.09 (avg)
B2 - 21.88mpg - 55.20mpg = 38.54 (avg)
B3 - 22.06mpg - 54.35mpg = 38.20 (avg)
A4 - 21.74mpg - 53.30mpg = 37.52 (avg)
A averages = 38.38mpg
B averages = 38.61mpg
0.6% increase = NOT WORTH THE TIME AND EFFORT!