i dont come to this forum too much anymore because its always filled with a bunch of a$$holes but i still share for the few good guys out there.

the way HHO should be done is to make the HHO efficiently, port it efficiently then tune it to get as much as you can get out of it. its best to have 4 small efficient cells instead of one big less efficient one. then port the HHO directly to your intake valves, after that then you tune lean until you equal the the engine power of normal tune without HHO. the HHO is only to aide the lean tune to give it more power back to normal.

make a ZCLS(zero current leak system) with everything zero current leak or as close to it as you can get. https://www.youtube.com/watch?v=a-jRkpcfEwY

port to the vacuum
https://www.youtube.com/watch?v=8zWSJP4W12I

re-tune with your watt draw in consideration at idle and all other RPMs
https://www.youtube.com/watch?v=6yi9pROupJ4

the joy of using less gasoline but having more than enough fuel to run your engine even more efficient is a sweet feeling. the computer knows the fuel is leaner and its registered on all the instruments too but the computer cant correct it because im in control of the whole operation not the computer(ECU/ECM)
https://www.youtube.com/watch?v=fTknGE7CXd8

Tune on and stay lean my friends