This video pretty much says it all.

[utilitarian]

Who in their right mind would sell multiple  HHO booster devices to a Sheriff's Dept. knowing the device doesn't work?

Ok, Let's assume that we don't know everything about nature/physics for a second...

What else could actually be going on inside the engine of a HHO booster vehicle to improve performance, other than the actual energy from the Hydrogen.   

Could the HHO gas be cooling the engine, and improving the performance?

Could the compression or heat of the engine + hydroxy gas + water be adding energy somehow?

Is steam adding energy as well?
If the system does actually work, there probably xtra energy is coming from something other than HHO gas.

They sell the devices to everybody.  What are they supposed to do when someone buys them, say no?

As far as the other effects you mentioned.  Just think about what you are saying for a second.  Do you know how many millions of manhours have been spent by car companies trying to figure out the most efficient way to build an engine?  Do you think that something as simple as cooling or changing the pressure in the cylinder has been overlooked?  If it was that simple to increase fuel mileage by the amounts claimed, every car maker would be doing it.

[newbie123]

Well, the ICE is about 25 percent efficient, and has been for ..... What? 100 years?     The personal computer has evolved from dirt and is already 100000000x better in the last 30 years.

Tell me that sounds right.



Why not use something as basic as waste heat recovery (steam) to improve engine performance?   There's a 10 percent, at least, increase.

Why not recovery all the energy lost while breaking (with hydrolics, or some other energy recovery device)   ... There's another 20 percent increase..



These are very simple, and old, technologies, and probably easy to implement.   But they're even available yet? Why?



You can't honestly say something isn't fishy about this? Can you?

[whopper1967]

Apparently they were not too concerned,they never used the pogue type carbeurators that vaporized gas and got hundreds of miles to the gallon.Matter of fact,the shell oil company used to hold a yearly mpg contest,there were several cars that got at least 300 mpg,one that comes to mind recently was discovered and sold on ebay.It was an opel with some very interesting mods,it is a well know fact that liquid gas isnt burnt in engines,if you could vaporize the gas like they did in these carbs,well you get the picture,thats the whole point of catalytic converters,to finish buring the gas.Anyway,if you think the auto industry always has your best interest at heart,why are there so many new cars produced that have sooooo many problems with hardly any miles on them?They could make cars last a million miles if they wanted,yet even when they are taken care of,most dont last a hundred thousand without some major problems,except for toyota.....they rule...lol,wish i had one.

[utilitarian]

Well, the ICE is about 25 percent efficient, and has been for ..... What? 100 years?     The personal computer has evolved from dirt and is already 100000000x better in the last 30 years.

Tell me that sounds right.

Why not use something as basic as waste heat recovery (steam) to improve engine performance?   There's a 10 percent, at least, increase.

Why not recovery all the energy lost while breaking (with hydrolics, or some other energy recovery device)   ... There's another 20 percent increase..

These are very simple, and old, technologies, and probably easy to implement.   But they're even available yet? Why?

There is nothing fishy here.  Braking energy regeneration is already in place in hybrid vehicles.  As for recapture of wasted heat, well, it's a complicated process.  There are economic and efficiency tradeoffs for everything.  If you have an economically viable way to make use of the excess heat generated by an ICE, let's have it.

For an example, look at turbocharging.  This is an old and proven technology to make an ICE more efficient.  Yet its drawbacks and costs keep it from being implemented across the board.

[hydrocontrol]

Modern computer controlled engine systems are not designed to just add hydrogen and have the mileage improve without modifications made to the computer system to change the mixture and timing. You would have much better improvement in a standard points and condenser type car system. I believe that is one reason the automotive industry went to computer control is to try to prevent changing the fuel source. The fuel industry also came up with 'additives' that were 'suppose' to improve the fuel 'burn' but actually just watered down the fuel so you would use more. So in this regard KilltheMessenger is correct. About 90% of the modern computer controlled cars will not see any improvement in fuel economy by just adding HHO as the car computer will just change the operating parameters. So the basic 'off the shelf' add a HHO source to your engine will not work as the modern car engine has been designed to run on 'selected fuels'.  As for running and engine on more water than gas just check out the JLN website for his lawn mower engine running 80% water 20% gasoline. Reforming with the PMC. Off the shelf plumbing parts.

http://bingofuel.online.fr/bingofuel/pmcjlnen.htm

The method has been used on all sorts of engines. Just check the links. I would suggest people actually try a reformer on a simple engine first just to get prove that it actually works. People really need to open their eyes. The truth is you can run a simple engine on mostly water but a 'computerized designed to run only on gasoline engine'  is not going to be easy to run on any other fuel then the designed 'gasoline'.  No need to spend $ 1,200.00 for proof when you can spend less than $ 50.00 on some plumbing parts that will have positive results to show you can run an engine on water. Trying to improve the mileage of a modern car that has been designed "not" to be improved will never get good results and if you try there are EPA laws about engine modifications that will have the government coming after you for modifying your engine.