THIS IS A Draft
Develop & Layman's Guide to establishing a better understanding
HH+ O Install Points I have alot more to add to this but it is a guide to get you thinking straight.
You have to consider vacuum pressure on you hh+ O and over come cell collapse with needle regulator or nozzles
Where to locate your HH + O injection nozzle.
Well let's first start with where not to place the nozzle.
When placing your water injection nozzle makes sure you do not place the nozzle upstream of a MAF or mass air flow sensor.
Fluid running through this sensor can damage these sensors on some particular engines. Next we recommend not installing these pre-intercooler unless you are injecting pre-blower on a supercharged engine that has an intake mounted intercooler. Injecting before front mount intercooler can cause the HH+ O mixture to collect at the bottom because of the restriction of the tubes. Okay, now we know where not to place the nozzle, lets get on to where to place it.
Starting from where the air enters the intake tract and ending at the intake just prior to the combustion chamber.
1 Pre-Turbo HH + O
We don't recommend this location at all if you do not have the proper equipment such as the proper nozzle, nozzle size and high pressure pump.
Locating the nozzle here is the most controversial location. The majority of HH+ O injection users do not use this location. One reason for someone to inject at this location is the HH+O mixture chemically alters the turbo compressor map.
The HH+ O l injection will dynamically shifts the compressor map of the turbo so that it has the compressor map exhibits the characteristics of a larger turbo.
This sounds great but, the main issue with pre-turbo nozzle placement is what mixture can damage the compressor blade if the mixture is not properly atomized when passing through the turbo.
In order to inject pre-turbo with out compressor damage you need a high quality low volume nozzle and high enough pressure to get the HH+ O as finely as possible, and the smaller nozzle which allows for smaller/finer gas. We recommend you mount the nozzle as close to the compresser as possible.
2 Pre-Intercooler
Pre-intercooler seems like a sensible nozzle location but, the thing to think about is if the air entering the IC is pre-cooled, the ability of the intercooler is because the temp difference is lesser. It is also possible for the fine HH+ O mist to collect in the bottom of your intercooler core.
We don't recommend this location either. The other problem is that there's a possibility that the hot air from the turbo might unnecessarily over heat vaporize to flash point the HH+ O and take up some of the volume built up by the turbo that was supposed to be for the charge.
Pre-IC does work for some track cars such as road racing that operate at a more constant higher RPM. For the daily driver, weekend racer, the pre-intercooler location should not be considered.
3 Post Intercooler
Most computer controlled engines have an intake air temperature (IAT) sensor. This sensor monitors the temperature of the air going into the motor.
The reason for putting it before the IAT sensor is because it will see the cooler temps and the engine will advance timing, allowing for more power. Also placing the injection nozzle as far from the cylinders/air intake sensor as possible, it allows for the HH+ O mixture to be better absorbed into the intake air charge.
This allows for great distribution to each cylinder. This post intercooler nozzle location should be the primary nozzle location to be considered for most users.
In theory, since the air charge will be mixed for a longer distance, and therefore time, allowing for the moisture to be absorbed by the air, creating the coolest possible air charge going into the cylinders. HH+ O molecules from a nozzle located here have more time to be absorbed by the intake charge exiting the IC before making it into the combustion chamber.
4 Pre-Air Intake Temperature Sensor
In the cold side charge pipe is usually an easier or less intrusive nozzle location for most user's than the IC exit tank, but still the closer to IC the better. Locating the nozzle here has same as for reason given in above (location 3)
5 After Air Intake Sensor
After the Air Intake Sensor: You can usually mount it either before or after the ‘butterfly' and still be after the air intake temperature sensor.
The main difference when mounting the injector before or after the butterfly is there is less vacuum before versus after the butterfly when idling or driving in vacuum. Translation, when in vacuum, there is more vacuum after the butterfly than before it. Here is why this is important:
If your solenoid is placed very far from the injectors (more than a couple of feet), then the vacuum can actually suck just a little bit of the HH+ O. This small amount of moisture ingestion during vacuum is not a problem.
6 Intake manifold
This location can be the most complex area to install. Usually requiring that he intake be removed for access.
Injecting here is going to yield the largest Vacuum on HH+ O Cell which is ideal for getting into the combustion chamber but not so I deal for the vacuum on the cell which can such out water etc.
And with the closer proximity to the combustion chambers is going to provide a larger amount of HH+ O into the cylinders. Doing this usually requires more fuel from the factory system be removed.
This option is best for max cooling and savings .
The HH+ O here is being injected in a manner much like port fuel injection and it is the bigger HH+ O molecules being injected here that have a more direct effect of in cylinder cooling and injection here has more of an effect of altering the flame front of the combustion charge in a way much like a higher octane fuel.
To take full advantage of this nozzle location it is suggested that trimming away some of the factory dumped fuel be done.
In other words, in order to take advantage of the better properties of HH+ O over fuel for cooling and injecting HH+ O at this location, you want to remove the dumped fuel and actually REPLACE this with HH+ O.
This injection point with a pretty sophisticated WI control method allows for the most advantageous use of HH+ O injection.
The drawback for nozzles located heres is kit/component complexity, install complexity, additional labor, possible machine shop costs, and possible additional parts costs.
Currently the Last method we are looking at needle valves and injector nozzels and low pressure pumps to stop vacuum getting to and effect cell if we over come that we have a major advance here.
I am Inviting comments on this to improve options for controlling vacuum to HH+ O cell whilst feeding in as close as possible to cylinders
Dan