28 Comments on How to build a simple, yet effective, HHO generator

terrystech on Wed, 4th Feb 2009 7:02 pm


I am happy I could help get you in the game. This design was never intended to be a final product or efficient design. This is a design to help folks learn the basics. One tip on your neutral plates…dont go over four neutrals between your anode and cathode….trust me…four max.

HHO4ALL on Wed, 4th Feb 2009 7:02 pm


Nice simple design. After I watched this video, I had to try your design, but the production was not very exciting.

I modified the design slightly by bending the handles outward and placed 5 Neutral plates (stainless wall plate covers from Lowes) in between them. This allowed me to have even current of 2 volts per plate. + N N N N N -

This is important, because it lowers the amp draw and reduces heat, but at the same time I have increased output substantially.

minga86 on Wed, 4th Feb 2009 7:02 pm


one of the best and most informative vids I’ve seen

MikElectronics on Wed, 4th Feb 2009 7:02 pm


just wanna say this is one of the neatest designs iv seen, simple and it works, good stuff i like it

martiensbekker on Wed, 4th Feb 2009 7:02 pm


Thanks for your quick reply. Its a 2.5 TDS 4×4 Isuzu, they call it a Vauxhall this side. It does not have air brakes. Must I connect into the air filter box? What do you add to your water and how much per liter or gallon? You got a great post! If you eve come Cornwall, UK way come and visit!

terrystech on Wed, 4th Feb 2009 7:02 pm


If you are referring to the jar with the water…I was simply using that to demonstrate the unit producing HHO gas.

terrystech on Wed, 4th Feb 2009 7:02 pm


I am not familiar with the model your are referring to…HHO generators work far better on diesels. On larger trucks with air brakes you need to be very careful not to feed HHO into the compressor inlet as these trucks often use air from the air inlet line going into the turbo.

martiensbekker on Wed, 4th Feb 2009 7:02 pm


Hi there, great video! I have a Vauxhall Frontera 2,5 diesel 95 model. I’ve seen some hho generators installed in diesels. What do you think and what about sensors on this vehicle? Thanks

eaglefeather27 on Wed, 4th Feb 2009 7:02 pm


what was the second container for that was hooked up to the fuel cell?..and what hose would you hook it up to,to have the hydrogen mix with the gas?..

terrystech on Wed, 4th Feb 2009 7:02 pm


The question is highly dependent on how much electrolyte you add to your water which effects how much current is flowing as well. The more amps the more heat and the more HHO gas, but there is a down side and that is boiling…you don’t want boiling water.

fujifilmnew on Wed, 4th Feb 2009 7:02 pm


Hi
Nice vid!

How often do you have to refill or renew the water-mixture?

Thx

terrystech on Wed, 4th Feb 2009 7:02 pm


First mix your water with Texaco Anti-freeze to the desired temperature, then add your electrolyte to get your desired reaction. If you have a source for pure ethylene glycol that is best, but Texaco anti-freeze is also very good.

lvbgtdss on Wed, 4th Feb 2009 7:02 pm


How would you keep the water from freezing in the winter??

terrystech on Wed, 4th Feb 2009 7:02 pm


Good post As 88 said the sensors before the Cat. Converter are the sensors that send information for fuel adjustment.

terrystech on Wed, 4th Feb 2009 7:02 pm


Almost all vehicles require mods to the O2 sensors and sometimes even the Mass Airflow sensor. The sensors feeding the cat. converter can usually be modified by installed an O2 sensor extender in the pipe. This pulls the sensor back out of the pipe so it does not sense the extra O2 generated by the fuel cell. This usually works well…try the simple first every time. It saves time and money Thanks for the great question…

terrystech on Wed, 4th Feb 2009 7:02 pm


Check the amp rating on your alternator….it is most likely a 75 watt or above. A 20 amp draw is considerable draw and sounds like your electrolyte solution is a bit strong. 20 amps is a bit on the high side. If you are getting good production the way things are you should seriously consider investing in a PWM. Increasing the frequency and voltage allows you to lower the amp draw and get the same results.

terrystech on Wed, 4th Feb 2009 7:02 pm


If you want precision control over amps and frequency you can get a PWM off eBay. A pulse width modulator allows you to control power and frequency to get just the right reaction. Combined with a good electrolyte mixture you can have quite an impressive HHO fuel cell. Good luck and thanks for the question

terrystech on Wed, 4th Feb 2009 7:02 pm


That is the beauty of this design, that should not happen. The only way that could possibly happen is if the discharge line to the airbox was to become plugged or crimped. If that did happen the worst thing that would happen is the lid or the elbow fitting would leak or pop off.

terrystech on Wed, 4th Feb 2009 7:02 pm


Great question….I have had so many amps flowing through one of these on the test bench that the wires melted….rubber unaffected. Think of tires on on Arizona highway

dbrannon79 on Wed, 4th Feb 2009 7:02 pm


I have made two of these generators for my 99 dodge ram, which has a 318 v8 engine. I used two ss wall outlet covers as plates in each, they are pulling about 15 to 20 amp together. Will the extra load on my alternator cause my truck to use more gas? and to your knolage, do I need to make any mods to my o2 sensors on this truck, it has three or four sensors, there is two at the manifold and one before and one after the cat. Thanks.

ed6ontube on Wed, 4th Feb 2009 7:02 pm


How do you keep the pressure from building up in the glass jar and exploding? How do you keep it from backfiring and exploding?

How do you control how much hho is being made? How many amps does your hho jar take?

tombasa on Wed, 4th Feb 2009 7:02 pm


how many amps can the rubber lid hold before melting?

bankedonk on Wed, 4th Feb 2009 7:02 pm


sick vids homie 5 stars and favoritecheck out my vid to =]

terrystech on Wed, 4th Feb 2009 7:02 pm


The timing of the engine could cause a backfire if enough HHO were to collect in the intake manifold. I have seen this and have personally had this happen on propane powered engines and it is not pretty. The manifold explodes, COMPLETELY, and sometime pieces fly through the hood. I had one catch on fire once. ALWAYS LEAN TOWARDS THE SIDE OF SAFETY FIRST!!!

terrystech on Wed, 4th Feb 2009 7:02 pm


I used to work on propane systems, I had several company vehicles running on propane, and I have seen what can happen when you have too much vaporous gas in the intake manifold of an engine. If you pipe the HHO directly into the air intake near the fuel injection or even secondary feed the intake manifold you are just asking for trouble. Remember these engines are designed to run on gasoline, not HHO.

andrew on Wed, 17th Mar 2010 11:56 am


great video

i’ve created a hho system and it does not seem to be producing any gas; furthermore is turning the water brownish, yellow. testing to see if any bubbles were being generated in another container to no avail….any suggestions?

Gary Harlan on Mon, 8th Nov 2010 9:39 pm


Thanks for the simple yet informative video.I made one similar to yours and want to know where and how I would connect it to a carburator…also is there some way to ensure a backfire could not cause a problem and cause an explosion in the generator such as a one way valve?

john dauley on Tue, 25th Jan 2011 7:37 pm


I just installed the gen. on my 94 chevy P/U I think I am useing to much b. soda cause I keep blowing fuses. Is the answer less soda? I have 2 plates in the gen. but not made from spatulas but thicker stainless steele. The water gets dirty quick, distilled water or tap ? soda or lye, which is better ? Thanks for all the info and fun..And I am learning….still

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