[DmcL]

i had one fitted to my old 318i and did notice a slight improvement in MPG. considering the size of the jar used and what was used as the anode/cathode id say a well designed setup would give better results. only thing is if u build a system that makes alot of HHO u will probably need something to fool the ECU into using less fuel in order to see the most benefit from the HHO booster. the big boys so to speak use neutral plates in the jar and also use a PWM to limit the current drain as the system heats up so it the current will not run away so to speak when the system heats up.

what i didnt like about the kit i bought was it did not come with a bubbler so if the engine happened to backfire thru the intake for whatever reason it would light the hydrogen and blow the jar up. the bubbler acts to stop the backfire and only destroys the bubbler and also prevents water from the booster getting into the engine.