Hi all, new to this but learning quickly. Anyway to cut a long story short, got my generator working great . Making great gas, amps are good (20 when at operating temp), I have a carburetted engine (1987 Nissan), so in theory I should see something, but my gas mileage is the same, and I don't understand why. I'm sure I'm doing something wrong, or forgot to do something. If anyone has any ideas, or questions as to what I have or haven't done feel free to ask

actually,if you have a carb,you will prob have to change the jets in your carb,if not,i dont see how you mpg would change any at all,but your performance should increase even so.

Hydrogen is a very light gas.

Make sure you're near a heavy sort of vacuum like the start of the throttle body or the mouth of the carb.
Where are you injecting the gas exactly?
What's your gas output in lpm (liter per minute)?

If you have O2 sensor, it is partially responsible too. Look around the net and you'll see the solution that will suit your need and make. Also check out newsgroups, especially ones like:

Nissan

    * alt.autos.nissan  Google Newsreader

Car models: Nissan Maxima

    * alt.autos.nissan.maxima  Google Newsreader

Car models: Nissan Z

    * alt.autos.nissan.z-car  Google Newsreader

They might have specific hints for your cars O2 since messing with it's output is done to INCREASE the amount of gasoline for performance reasons too.

Try leaning out your idle a bit. That is the time when the least amount of gas necessary is being furnished, and if you have good output from HHO, it should be able to provide at least 50% of the fuel demand at idle.
Seems like a tiny amount of all driving time, but it adds up.

I think that's the time where any pinging would be minimized too.

Hydrogen ignites faster than gasoline and present engine timings are done so that the piston is still compressing the gasoline/air mixture to the top of it's stroke when the spark plug fires.

Hydrogen explodes fast enough that it will realize it's full potential while the piston is still traveling up and rob the engine of energy (and can damage it severely as higher RPMs), so it's a good idea to know how much HHO you're injecting into the intake to see if you might have to start adjusting your timing towards TDC (top dead center).

Search and read in the archives here and youtube. I'm sure there's lots more good info out there.
Use it to verify what I've told you and learn the other helpful hints I don't know.

Thanks to everyone for all your input so far, here's a little more background. The car is a 87 nissan Sentra. It has a feedback carb, that takes most of it's input from the oxygen sensor, there's a fuel enrichment solenoid in the carb that controls the mixture, I read the haynes manual on the car and found a way to disconnect it, so the oxygen sensor can do whatever, the carb cannot change anything. Bad news is that because of the type of carb, the only adjustment possible is the idle mixture, but that is covered by a plug I have to remove, everything else is set at the factory, I can put a webber on it, but don't want to, although a webber is adjustable. My current theory is that I was losing my gas, so I checked and resealed the bubbler, and put vacum to it (1 inch at the generator) that I didn't have before. I noticed that since I did that the idle is up about 150 rpm. More to come.   

hi there, im batling please help. i have build a hho elecrtolizer, i'm using ss plate's would a pwm work with te plates or does it only work with the ss tubes.

when i conect the pwm with te ss plate system I build the currant drops, but the gas progution drops like hell aswell.
the pwm is the one on pdf 14,

the pulse width modulator is limiting the current by pulsing it, this is why the current drops, because its going on and off. this will directly effect how much gas youll produce becuase electricity is whats making the gas, an average pwm is mostly for exactly that, so you can have comtroll over your cell and hopefully not overheat anything. now the d14 i believe is the dave lawton pwm if i remember correctly, i havent played with one myself but remember a lil bit about it, the frequencies have to be tuned to the water and the pipes there are 3 key frequncies... hang your pipe electrodes from a string and tap them with a metal hammer, the inner and outer pipes whould hit the same note, changing the note by cutting a slot in the bigger one like a pipe organ found in a church, i think you have a ways to go before you know enough to crack with frequency, keep reading and trying... peace

if your current draw it too high then your plates are too close let em breath   

i have almost 1/4 " for a gap between plates

ist