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Anyway, myold I am working on an Arduino (open source micro controller) based solution and am currently writing the software to allow use of another very exciting open source project that plugs into any OBDII CAN (or older) bus. With this, we can read way more than just MAP, but also just about every sensor (which will come in standardized OBD data format). The cost of the system is approximately $120 USD if you source the parts yourself. So when mentioned MAP, I also meant any other readable sensor such as MAF or even TPS. I fully plan to open source the controller code on GitHub once ready for alpha. Right now my tests are utilizing a China made 50A (peak) robot motor driver module which is controlled via Arduino PWM. This system will not be like anything I have seen and the logic will be 100% tweakable granted you have the understanding. I could build in some potentiometers for min/max and gain control (to name a few), but I would have to charge for that system as it takes time to develop and I am in the red concerning time these days.
Stevo, that sounds really good. It is what the small vehicle needs. I only use the small vehicles to test on because the 30 plus liter engines/vehicles would not fit in my shop. LOL The other problem is they are all 24 volt. I am also looking for simple foolproof solutions to get the right amount of HHO for the right demand. The exact ratio is not known because it depends on so many things. On the big engines dividing the demand into 3 or 4 sectors yields better results in all of my testing of these big diesel engines. More HHO at higher demand and lesser amounts at lower demand. Each engine has to be tuned in those 3 to 4 zones to see the difference. Once you have it right you can enjoy some good gains. Even if you are off a little you are still smiling because theses burn over 50 gallons an hour at the higher demand level and they work up there a lot. Saving even 10% is worth it over a year of use. More of course is better!! The high amp draw on the big engines is like a fly hitting the wind shield. There torque is so much that 200 to 300 amps does not seam to change the fuel consumption by any meaningful amount when adding HHO. 20 to 30 LPM takes some amps no matter how efficient you are. I have a 12 volt controller that can handle 2 zones and off at idle which works on a 0-5 volt sensor. I will be doing some serious dyno testing in the next couple of weeks or so on a 7 liter diesel 12 volt system. This will give some very much needed information. I can increase its zones by using PWM's and multiple reactors. The use of multiple reactors is always more efficient compared to on large one. The results should be interesting. I am not convinced that the MAP/MAF is the best single. These up coming tests will sort all of that out. With a consistent volume of HHO it shows gains in all ranges of demand which puzzled me at first on prior tests. I then figured out that it is possible but there is much more to be had with the right ratio based on demand. At one point you are getting the max gain for that point or demand and all other points/demand, just minimal gains but gains just the same. This is all measured with a very sophisticated flow meter and if in a vehicle, a GPS etc. It is then plotted in a graph so you can see the difference when HHO is on and when it is off going over the exact same route with the same load if in a vehicle. It plots the route also to make sure it is the same. Expensive equipment but necessary. You have to be much more precise on a small car where an extra suitcase or passenger robs you of mileage when it comes to how much HHO is need for a given demand. Will be looking for more of your results.