How To Get The Best Mileage With HHO

Best Mileage Using HHO

Hard acceleration or typical stop and start driving generally won't show any improvement in mileage using HHO. I wonder why? Here's an explanation:

In a typical HHO system, there is no way to store extra HHO generated. So we never, ever have a surplus. Even after long periods of engine idling, the total production of HHO has been consumed by the engine, provided the unit was running during idle. So once you step on the throttle and the engine loads up as it picks up the full weight of the vehicle to accelerate to speed, it gulps mostly gasoline, diesel or whatever the primary fuel happens to be. The volume of HHO does not change in most HHO systems, so as the primary fuel is gulped by the engine during heavy loads, the HHO is really an insignificant quantity to have any measurable effect on fuel mileage. Since in most HHO systems the volume of HHO being generated is small, but steady, we need to drive in a manner to take advantage of the HHO and get the most out of it. Here are some facts; driving with HHO yields the best results during moderate loads at a steady cruise speed. This way the fuel consumption is moderate while the same amount of HHO is being introduced into the engine. At this point the HHO begins to shine as a fuel saving technology.

The less throttle you give the engine, or the slowest speed you can drive while cruising, the better the mileage improvement using HHO. As we already know, the HHO flows in at a steady trickle. Therefore the less throttle we give, the more the HHO takes over in displacing the consumption of the primary fuel. So it goes without saying that if you drive hard and furious or are towing a heavy load, it will be hard to notice any improvement in mileage from HHO. Those that may have found a system to store excess HHO can dump that excess during heavy throttle periods to get better mileage. But the average person does not have the ability to store extra HHO, so we must be aware of how much of the primary fuel is being consumed before we expect the HHO to provide any improvements in mileage. So basically, we just need to get to a nice cruising speed and drive very easy to allow the HHO to give us the best "push" it can.

For my mileage runs I usually take only highway mileage getting fuel before hitting the highway and generally filling up before getting into lots of stop and start traffic to test highway only mileage. This way I have an apples to apples comparison with very few variables to affect things. In other words, I'm at peak mileage and if any improvement is to be noticed it should show up in this manner. Of course, there still are variables. Wind is one variable that can affect mileage quite a bit as well as air and engine temperature. So if on a windy day my mileage drops of a little, I'm not concerned as I realize wind resistance creates more drag on the outside of the vehicle requiring slightly more throttle. All part of driving in the real world to be sure. But if I increase cruise speed, the need to increase throttle will drop mileage. In a non-HHO vehicle driving just 10 MPH faster can increase fuel consumption a quite a bit. Consequently if we are running an HHO generator increasing speed will not only drop mileage figures, it will further dilute the meager amount of HHO we are generating making it difficult to notice any improvement in mileage from the HHO. A more complex system that increases amperage/volts to the HHO generator during heavy throttle may help override some of these problems. But most of us really don't have something this complex in use so the point is moot at this time. We need to aim ourselves to the best mileage possible when using HHO and that means being aware of how fast we are driving or how hard and often we are accelerating. Then we also need to be aware of the total weight we are pulling including anything we may be towing.

To Get the Best Mileage Results with HHO:
  1. Cruise at the slowest safe speed
  2. Accelerate gingerly or moderately
  3. Reduce weight/load
  4. Avoid long periods of idling which consumes fuel with no benefit
  5. Avoid excessive heavy traffic or stop/start driving

In the "real world" we all live in there will be start/stop driving and we do need occasionally to tow or carry heavy loads. Sometimes we just may be late or in a hurry and blast down the highway at a higher rate of speed. Just remember that mileage will drop during these heavy driving periods and don't expect the HHO to make as impressive of a difference in mileage.

Increasing electrolyte strength or reducing plate spacing will increase the amperage and also increase HHO production. Removing one or two neutral plates increases amperage and HHO production. A lot of these factors change the HHO generator's efficiency meaning the extra HHO will possibly be negated by increased load on the engine from the charging system. It is best to start out with an HHO unit that has been tuned and tested to be at peak efficiency. Increase amperage through electrolyte strength to get good volume of HHO. But if you switch the unit off and on during engine idle and the engine idle is affected, the unit may be over running that size engine. Reduce total amps until switching the unit on does not drastically load down the engine at idle. At this point you should have things properly configured. When in doubt get help from other club members to determine how to "tune" or "setup" your HHO generator.

Fuel Injected EFI Cars using HHO

EFI or Fuel Injected cars, which comprises most gasoline powered autos being sold today, need special consideration to get the best mileage from HHO. On these cars there is an oxygen sensor that is constantly reading the information in the exhaust, oxygen content, which the CPU or onboard computer evaluates to determine the proper fuel delivery. This information is based on the information from the oxygen sensor as well as other factors/sensors that provide input to the CPU. This can be complex since many of these work somewhat differently in how long old information is stored and averaged with new information and conditions such as driving habits. The most important information concerning HHO is what was discussed above involving the steady trickle of HHO to the engine. While at idle fuel consumption is very low and the volume of HHO is more massive when compared to actual fuel delivery. At these times the oxygen sensor will record a very lean condition to the CPU. On most cars this information will be averaged with the rest of the input and the CPU will adjust fuel delivery based on total information. If the vehicle spends a certain amount of time idling with the HHO turned on, the CPU may increase fuel delivery to compensate for what appears to be a very lean condition. Even if this lean condition is only at idle, the average of total input could net large increases in fuel delivery by the CPU making mileage figures actually drop to levels worse than originally recorded by that vehicle. To counter these problems many on the Internet promote using electronics to intercept the signal and modify it to "fool" the CPU into accepting a false signal that would indicate fuel delivery need not be increased. Others promote installation of an adaptor that will recess the oxygen sensor to make the readings less lean than what the CPU would normally receive. Be advised that it's still possible that these modifications will not correct the problem if the vehicle continues to have long periods of idling with the HHO running. If a switch were installed onto the throttle disabling the HHO during periods when the throttle is at idle position, or if the driver were to switch off the unit manually during engine idle periods, mileage figures will probably be improved. It's best to not have the HHO running on EFI vehicles during engine idle otherwise mileage will be negatively affected.

Another potential problem with EFI vehicles concerns how the HHO is brought into the engine's intake. If the HHO is vented into the engine via of a vacuum line, especially a vacuum line that is vented to open air, a very lean condition will be recorded at engine idle. This condition not only will affect the fuel delivery information by the CPU, but could be severe enough for the "Check Engine" light to come on. If HHO is delivered through a vacuum line care must be taken to make sure there are no vacuum leaks, otherwise turning the HHO unit off via of a switch will not correct problems with poor fuel mileage. If HHO is delivered via of the intake such as the air cleaner or air cleaner housing, then there should be no problems that would cause the "Check Engine" light to come on. However, the HHO still would need to be switched off during idle to prevent other factors from causing the oxygen sensors to send bad information to the CPU. Properly installed the HHO should work as well on EFI vehicles as on carbureted vehicles. This is probably the reason so many EFI vehicle owners complain of poor mileage using HHO while yet others brag about great mileage improvements. You just have to watch the details on EFI cars so the CPU isn't fooled into increasing fuel delivery.