ILLS
Dedicated LVC Member
is not displacing enough oxygen in the intake to warrant any tuning. It's not even enough to give a noticeable mileage increase.
Until you have tested this in person then you are just guessing. I will tell you from personal experience looking at datalogs of another persons vehicle that a HHO system does indeed affect the AFR's and makes them read more rich at part throttle. Now I do not trust many other peoples personal vehicle testing because not many practice repeatable methods but the fella who did the testing and those logs is very methodical with his MPG testing. I can assure you that the AFR's can and have been richened a noticeable amount with JUST the addition of one of those HHO devices. I decided to give the guy a little tuning advice for how to tune a vehicle with the outside introduction of additional fuel when doing closed loop runs. After the retuning the AFR's layed back down at their new stoich (by volume) calculated by AFR offset. MPG's were gained even after recalibration. Threads like this interest me but at the same time bore me as well. It is nice to see people in a heated debate about something but after repeat sessions of "research on google, post on LVC" stuff it gets old. Anyone can do an internet search and yield information, whether accurate or not, on whatever they want. You guys keep plugging the keyboard and crunching the numbers.