Actually, I wanted to keep this hush hush but what the heck, good things must share mah. I've just completed a water injection kit install from Cooling Mist. This I chance upon initially looking for an intercooler water spray system. Together with another nuthead we purchase the kit off the above website. They were very efficient people answering all my initial questions and even customizing a kit for us. I took the turbo and the other fellow the turbo/na option. This enables us to share the cost of shipment. Shipping cost about USD70++ alone due to the weight and size of the 2 kits. However, the kit arrived within a week and I had to pick it up from the nearest pos m'sai depot. Ask them nicely they will fix the tax for you #$@&%*!.
What the kit came with for my so called deluxe single stage setup.
1)100psi pump. (6.894bar)
2)Water Solenoid.
3)3.9gph Injector and injector holder.
4)Boost switch set at 10 psi.
5)Flow detector switch and LED indicator.
6)High temp/pressure Teflon hoses.
7)Brass barbs for solenoid and water pump.
8)All electrical connectors, cable ties, fuse, hose clips, relay and wiring diagram.
All the items were tested before being shipped to me. When I opened the covers for the pump there are still traces of water in it. Installation was not a breeze as the engine bay is already cramped. I had to sacrifice some space in the glove compartment to mount the pump in there. Let's hope that the GF's stuff still fits and she does not notice the pump. Water is drawn from the existing water hose from the rear windscreen nozzle. I had to clean the water tank and Oh, did I mentioned that my rear windscreen effectively has no water to clean it.. Bah, I seldom look back anyway.
The Kit
The Pump mounted
The electrical wiring for the kit was easy to do. In fact I can do it myself. Installing the kit took about 2 hours as I insisted that all the wirings are to be shrink wrapped and that the components be as inconspicuous as possible. First to be done was the pulling all the water hoses. Second, location of the boost switch, solenoid and water flow detector. The system works on boost. The boost switch comes pre-set at 10psi = 0.689 bar. This means that when that pressure is detected by the switch, it sends a signal to the solenoid asking it to open and the injectors will spray. The flow or clog nozzle detector is used to detect any flow or problems with the system. Wired properly, at the preset boost when the injector starts spraying the green Led lights up. It goes off when the boost falls below the activation point. Stays lit when the injector is clogged and does not go on when there is a leak or no water in the tank. A very nifty device. For this system the water injector is mounted just before the throttle body. Its so well hidden that you dont even know its there.
The Injector holder and Injector
The boost sensor
Water solenoid, injector installed in IC piping and flow / clog injector sensor
In-Cabin LED to know if the system is working
After full install
With the kit installed its time to test it on the road. Reach the highway, floor it a bit.. see 0.7bar, Led goes on and you feel a slight surge of power, out from the norm, from the engine. EGT was recorded at 750-780c at peak boost! That's about 70-100c lower. Cool! After a few hard runs the Led does not light up!! Bugger.. I popped a hose as the cable ties are useless. Switch to some good quality hose clamp and problem solved. Usually, the intake gets so hot as it will burn your hand when you touch it immediately but with the kit its only warm and you can leave you hand there before the heat soaks it up again
The kit really shines after many hard runs as the power feels considerably smoother and consistent. Even being stuck in a jam along the LDP, heat soak problem solved? This is what the butt dyno is telling me. Not sure of the actual gains until I take it for fine tuning later next month. Coolmist claims that they have reported a 20-25hp gains from the kit from the box and that the intake temps reduced to ambient temp. I do not have an intake temp gauge and cannot verify this. It will also steam clean the engine for you. Via customer feedback and their own testing, the kit allows you to run more aggressive timing and leaner fuel maps. I will keep you guys/gals updated on the gains when I go for fine tuning later.
BTW, the other nuthead has a NA/Turbo o2 kit meaning he has purchased the vacuum and boost switch together which allow him to either run aggressive timing and high compression Na or force feed it later. For a brief description of water injection theories google it or go to Rally Cars Water Injection article. This is just one of the many that I've found. There are also many cool upgrades available from Coolmist. Check them out if you're interested. Although less sophisticated than the Aquamist System, the retail is about half the price with good quality parts. Methanol and Alcohol safe too!!
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