I have a HHO generator I bought on ebay, it is based off the Water4Gas instructions. My truck is a 03 F150 SuperCrew 4x4 with a 4.6 windsor.

NEway, I use to get around 10.8 avg mpg, witha healthy mix of highway and city driving, since I installed my Water4Gas style HHO generator I have started seeing around 13.7 mpg with the same driving style. I was skeptic at first also, but decided it was worth a try, and paid $80 for a premade one off eBay.

I would think that smaller more efficiant motors would get better gaind from this thing but, around 3 mpg improvement made it worth it for me.

Just my $0.02!

 

See my post above.

If you're only getting 13.7 mpg with that engine/drive-train setup, you still have something wrong with either your truck or its driver.

I suspect any gain you might be seeing is due to what is called "test bias". While you may say you haven't changed your habits, I'll bet you have.

HHO wont work. Why?

"It's the thermodynamics, stupid!" to quote Slick n' Slack.

Steve

 

Hey I am doing my research and believe HHO may hold some promise. However, I just what to share what has worked for me in the quest to improve mpg. I drive a 2006 F150 Lariat Screw. The mods are listed below. Although there are obvious interactions between the mods, the step improvements have come from the TUNE and HEADERS. I routinely get 19+ to 20 mpg at 70 mph with a best of 23.6 mpg @ 60 mph on my 30+ highway miles trip to work. City driving is much less 13-17 mpg, this is one heavy truck. However, the truck is much responsive than stock.

Again I believe there is more to HHO than we understand and I like to hear more from those that have actually tried it.

2006 Lariat F150 Screw
3.55 gears
22" w 305-45-22 Kuhmo
Extang Fultilt Tonnoue
Flitch Fuel Catalyst
Royal Purple Trans Fluid
Royal Purple PS Fluid
Synthetic Motor oil

Corsa Sport Exhaust
2" Eibach Shakle Kit
Troyer Elec cooling fan
MAD Fan Controller
K&N Cold Air Intake 632556
Troyer SCT LiveWire Tuner
Dynatech headers
Accel COP
Granetelli COP connectors

 

Sigh...

Ron White is correct.

PT Barnum was an optimist.

Bill Engval is still passing out signs....

You "believe"??? Since when did a technical process become a matter of faith? If it cannot be explained under the accepted laws of thermodynamics, physics and best engineering practices, it's either something entirely new (highly improbable) or it's a scam/waste of time.

 

I came across this thread so thought I'd comment. I personally have installed a couple of HHO systems in my 97 plymouth neon. I started with the water4gas version, then tried the smacks, and other ss plate designs. The water4gas really didn't help, but the smacks design gave me initially 10mpg better. I originally at best got 30mpg, with the initial smacks my mpg went to 40. The fill up after this went down to 27. I installed a MAP enhancer that I made, and my mpg went up to 35mpg, then the next tank 32. It stayed 32 for a couple of fill ups. I thought I would put another jar in so I would have 2 jars producing HHO, and it didn't really help, but my battery died, and not sure if it is the alternator or the battery that's bad. The plus about the whole HHO thing is, It does work, the negative is at what cost. I was pulling anywhere from 15-20 amps with the HHO system. I believe this fried, my battery or alternator. I need to take the vehicle to advance auto to let them test and see which is bad. I'll keep u updated.

 

Propane, hydrogen, both are combustible gasses and in the realm of "thermo- dynamics" hydrogen has far greater thermal energy than propane. But you are right in that just adding an HHO generator is not going to increase fuel economy. I have read your posts and you are a knowledgeable cat. I am not going to assume, but I will guess that you understand that OBDII is all abut fuel and emissions management. If you read my post on page 5 you will see that in order for the HHO generator to be effective it is necessary to recalibrate your F/F tables ergo MAP sensor enhancers. When HHO is combusted (straight hydrogen too) the by products are water and oxygen. By default, when the O2 sensors detect oxyge and then relay that signal to the PCM to increase or decrease the amount of fuel to the mix. In that respect I am surprised that shharis is seeing any gains at all after 100 miles. There are several PC based tuner software applications that allow you to re-program your a/f tables. Again I digress to the caveat that if the HHO generator ceases to work then you are entering a lean burn scenario and as you pointed out will inevitably lead to irreversible engine damage and ultimately engine failure.
I still believe that more research is required.

 

Why is it that no one pays any attention to the rest of the 'deal'?
The motor is a PCM controlled closed loop system.
You cannot come along and use an add-on like this to get gains worthwhile.
The ox sensors detect the ox in the exhaust and go right back and adjust the A/F ratio richer to make up for it on a full time basis.
If your HHO results in more ox in the exhaust, the sensors will richen up the fuel and you get no worthwhile gain in fuel mileage because the HHO is not in control of the system.
There is not enough Hy generated to make any worthwhilre gain in power just from that point alone.
It seems convient and even ignorant to ignor all the rest and just think that HHO or some version of it will make major improvments without making changes in the motor, ignition timing etc to even have a chance of making worthwhile and permant gains.
AND I don't have to try one to know this.

 

See post 81. It is so nice to have a senior member knowledgeable as your self validate my statement above.

 

If you're screwing with the A/F ratios, O2 sensors, or the MAF sensors, the "HHO" crap is superfluous.

Just do the gimmick programming and you'll get the same results. Of course, all you're doing is causing a lean burn condition that will likely burn out your valves....

It's the thermodynamics, stupid!

Steve