How much HHO does it take to run a car?
Keeping this in consideration, can a car run on HHO alone?
The idea is to use electricity from the car's alternator to electrolyze water into HHO, a mixture of pure hydrogen and oxygen. Plenty of these budget sites even claim their devices are efficient enough for a version that would run a car entirely on water--no gasoline at all.
Besides, will HHO damage my engine?
Hho can cause your engine to fail if too much unwanted water vapor gets into the system. Genuinely dangerous, Hho should not be confused with the hoaxed, harmless molecule dihydrogen monoxide as this is actually another name for ordinary water.
To fuel a hydrogen car from water, electricity is used to generate hydrogen by electrolysis. The resulting hydrogen is an energy carrier that can power a car by reacting with oxygen from the air to create water, either through burning in a combustion engine or catalyzed to produce electricity in a fuel cell.