[Deputy Diesel]

I have had experience with both HHO and water injection.

First the HHO. I built the hho system stainless plates bla bla bla via what id seen on the wonderful world of the internet. Yes the system produced a good amount hydrogen. however it made absolutely 0% increase of MPG. about the best thing that it did was when I put "out" hose into a pale of water you could light the bubbles on fire and it sounded like a little machine gun.

Definitely messing with the PCM to cut back the fuel when cruising to compensate for the new found wonder fuel was the only change in MPG. And the change in driving style showed the greatest improvements.

I would say the HHO system was on the car for about 6000km. changing the water, wires running everwhere. constant messing with it for no actual gains. it got filed in the trash. And it was a major waste of time.

However the water injection system was a different story. I used it on an old carbed turbo Buick 3.8L I had. for 2 reasons. when commuting with the car about 100km a day it got expensive running premium in it to keep the detonation quiet. so i would adjust the waste gate to run 9psi of boost and on 87 octane. The nozzle was just before the carb. If i drove it easy it was fine but if it was play time id turn on my pump and inject the water. (very fine mist) 9psi boost 87 octane fuel with water injection on it would have no detonation. with out the water there was no way this would happen. At the track I would run premium (94) with water and get 15psi again no pinging. this proved reliable and safe for over 30,000km. it was on a pressure switch so it only came on after 5psi. and i installed a light so i could tell when it was working. for fear of it staying on when it wasnt needed. as for mpg increase I couldnt tell you. but $$$$ per km it was amazing.

I am currently building another water injection system for my 429ci ford 10.5:1 compression so it will run on 87 with no detonation. especially with premium at $1.40L