Long post with many pics...
I installed an Aquamist 2d water injection system and a 4 nozzle intercooler water spray system on my car.
Here is the Aquamist 2d system from the Aquamist website:
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more info can be found on the Aquamist website at: http://www.aquamist.co.uk/index.html
Here are some pics of the Aquamist installation:
The most obvious part that is visible is the boost pressure switch.
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The pump itself is concealed by the original plastic cover that is over an empty space beside the air filter box. So at a glance, no one will notice anything different if they did not see the pressure switch.
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My system draws water from the regular wiper reservoir, so I'll get a warning when the water runs low.
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This is a pic of the hi-speed solenoid valve with inline filter.
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The location of the water injector post IAT sensor.
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Inside the car, I've located the FiA2 fuel injection amplifier near the footwell. The lights are visible through the steering wheel just somewhere below my left knee.
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The blocked jet warning led is located at the corner of the driver's A pillar. The light is quite bright and will defintely catch the eye if it goes off. During startup, the light will come momentarily on while the pump charges up. This also helps ensure that the light is working before starting.
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My current setup is running with a 0.7mm nozzle injecting 260cc/min of water with triggering at 0.85bar boost pressure at high injector duty cycle. The injector signal is tapped from injector #1, which is the injector closest to the airbox.
I will post some dyno charts later on the effects of water injection, but safe to say, the power increase can be felt.
Only problem I see so far is that there is no space on the stock IC to mount the water injector nozzle before the IAT sensor, hence I mounted it post IAT sensor. This means that the ECU will still see an extremely high IAT and may still cut back on power to protect the engine even though the effects of water will prevent the engine from knocking.
Next, a bit on my intercooler spray system.
The controller is purchased from Autospeed, manufactured by Labtronics (Australia).
What this handy controller does is monitor the IC temperature relative to ambient temperature and fuel injector duty cycle (they call it the fang factor) to determine just how hard you're running the car. You set a temperature threshold and an injector duty cycle threshold... when both are exceeded the controller turns on the spray.
The benefits of this controller are reduced water usage and better control of intercooler temperatures thanks to its logic. No water is sprayed when on boost if the IC is already cool, spray continues between shifts and, if the logic decides you've really been hammering on the car, continuing to spray after you're off the throttle to get the IC temperature back in line.
More info can be found here:
http://www.audiworld.com/tech/eng22.shtml
The controller box and associated wiring.
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Other parts that were purchased are 3 x Brass T joints and a good length of rubber hose.
A volvo hi pressure water pump was also purchased.
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The pump and nozzles were connected as shown. The horns were moved to each side to allow more airflow to the intercooler. (didn't bring a camera when the installation was done, so I am borrowing a forum member's car for illustration - I hope u don't mind..
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Here is a pic of the nozzles:
you can just make out the upper two nozzles where the horns used to be.
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The controller box is hidden in the passenger side of the dash compartment (i.e. the side without the fuse box).
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Overall impression of the system:
After fiddling with the injector duty cycle sensitivity and temp sensitivity, I find that after idling at traffic lights for a long time, the IC core gets heated up due to the sandwiched design. When boosting off from those kind of stops at above 4000rpm or so (depends on injector loads), the spray will kick in. Effects on IAT is not known as I do not own an auterra OBDII scanner yet, but the air-con definitely feels colder after that
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Modified by Kaminari at 12:05 AM 6-20-2005
I installed an Aquamist 2d water injection system and a 4 nozzle intercooler water spray system on my car.
Here is the Aquamist 2d system from the Aquamist website:
more info can be found on the Aquamist website at: http://www.aquamist.co.uk/index.html
Here are some pics of the Aquamist installation:
The most obvious part that is visible is the boost pressure switch.
The pump itself is concealed by the original plastic cover that is over an empty space beside the air filter box. So at a glance, no one will notice anything different if they did not see the pressure switch.
My system draws water from the regular wiper reservoir, so I'll get a warning when the water runs low.
This is a pic of the hi-speed solenoid valve with inline filter.
The location of the water injector post IAT sensor.
Inside the car, I've located the FiA2 fuel injection amplifier near the footwell. The lights are visible through the steering wheel just somewhere below my left knee.
The blocked jet warning led is located at the corner of the driver's A pillar. The light is quite bright and will defintely catch the eye if it goes off. During startup, the light will come momentarily on while the pump charges up. This also helps ensure that the light is working before starting.
My current setup is running with a 0.7mm nozzle injecting 260cc/min of water with triggering at 0.85bar boost pressure at high injector duty cycle. The injector signal is tapped from injector #1, which is the injector closest to the airbox.
I will post some dyno charts later on the effects of water injection, but safe to say, the power increase can be felt.
Only problem I see so far is that there is no space on the stock IC to mount the water injector nozzle before the IAT sensor, hence I mounted it post IAT sensor. This means that the ECU will still see an extremely high IAT and may still cut back on power to protect the engine even though the effects of water will prevent the engine from knocking.
Next, a bit on my intercooler spray system.
The controller is purchased from Autospeed, manufactured by Labtronics (Australia).
What this handy controller does is monitor the IC temperature relative to ambient temperature and fuel injector duty cycle (they call it the fang factor) to determine just how hard you're running the car. You set a temperature threshold and an injector duty cycle threshold... when both are exceeded the controller turns on the spray.
The benefits of this controller are reduced water usage and better control of intercooler temperatures thanks to its logic. No water is sprayed when on boost if the IC is already cool, spray continues between shifts and, if the logic decides you've really been hammering on the car, continuing to spray after you're off the throttle to get the IC temperature back in line.
More info can be found here:
http://www.audiworld.com/tech/eng22.shtml
The controller box and associated wiring.
Other parts that were purchased are 3 x Brass T joints and a good length of rubber hose.
A volvo hi pressure water pump was also purchased.
The pump and nozzles were connected as shown. The horns were moved to each side to allow more airflow to the intercooler. (didn't bring a camera when the installation was done, so I am borrowing a forum member's car for illustration - I hope u don't mind..
Here is a pic of the nozzles:
you can just make out the upper two nozzles where the horns used to be.
The controller box is hidden in the passenger side of the dash compartment (i.e. the side without the fuse box).
Overall impression of the system:
After fiddling with the injector duty cycle sensitivity and temp sensitivity, I find that after idling at traffic lights for a long time, the IC core gets heated up due to the sandwiched design. When boosting off from those kind of stops at above 4000rpm or so (depends on injector loads), the spray will kick in. Effects on IAT is not known as I do not own an auterra OBDII scanner yet, but the air-con definitely feels colder after that
Modified by Kaminari at 12:05 AM 6-20-2005
