pdgood Monday, 12/06/10 08:00:59 PM Re: danceswithmoney post# 407 Post # of 491 Try ta comprehend this lyme. A Hydrogen Flame is invisible. This is a concern because if there is an ignition from the engine intake it would not be noticed until something else burns. Hydrogen Gas is really an energy carrier (or Catalyst) that feeds the source and is not a consumable fuel in and of itself. Hydrogen gas enhances the burn efficiency of whatever it comes in contact with. Unlike other gases which really burn and are consumed during the process Hydrogen coverts back to water where it came from to be re-used again. If it mixes with too much oxygen it will spend its stored energy very quickly in the form of a flash back. Pure Hydrogen will not Flash Back in an ordinary atmosphere environment Injecting HHO gas into the vehicle's intake tells the O2 sensor that too much oxygen is going into the vehicle's combustion chambers so the computer makes the gas mixture richer. This can actually decrease fuel mileage on HHO gas injected cars until the sensor is told to lean the mixture of gas to air, which is where drastic fuel mileage savings can be achieved along with emissions reduction. When running pure hydrogen the onboard oxygen sensor is not told to make the gas mixture richer so this is one less component to worry about when installing a hydrogen fuel injection unit. This may or may not make hh v hho easier for ya ta understand. It’s not a huge issue as I stated in an earlier post but these are the scientific facts. You can accept them or not.