Originally Posted by
jeepmonkee
I have a working hho system in my jeep and I also owned an 06 wrx with upgrades and Cobb tuned maps.Putting an hho in a turbo wrx kinda defeats the purpose.Its nice to have fuel economy (they make tuned maps for that) but you cant have your cake and eat it too .The turbo ecu is extremely sophisticated .Turbo cars need to run rich for power and detonation prevention.Meth/water injection allows for more power.With HHO you're running on the lean side and fooling the computer to think its ok. Not good on a turbo with so many variables,boost ,altitude,premium fuel,multiple converters.It would take a lot of computing time and failsafes. Has it been done? probably..have they lasted or succeeded long term? Diesel are a different animal all together.