DIY homebuilt water/meth kit, how to?

[bratjie]

Hi guy's, I want to build a water meth kit for my turbo setup on a 2.1 wbx. I want it to be boost activated at around 5 to 6 psi. I'm using T3T4 blowing through twin 40 Dellortos with charge cooler. Any ideas as to what to use and how to test/build would be greatly appreciated,

[MConstable]

[clonebug]

I built my own W/I system.
I used a Sureflo pump and cranked it up to 120 lbs pressure.
I used a gas tank from a lawn mower for the water/alcohol mix.
The 1/4 inch hose and push-loc fittings are available locally.
I use two Hobbs pressure switches and two nozzles... One set at 6 lbs and the second one at 10 lbs. ( I run a lot of boost)
I bought the nozzles from Devils Own just because they work well and it's easier to buy nozzles that are a specific size than to make your own.

If I could do it again I would buy a Devils Own pump since they put out 250 plus lbs and are internally regulated for a more consistent pressure.
It would only cost $50.00 more since they will sell the pump separately for $120.00.
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[miniman82]

^ ditto. A lot of people I know use oil pressure switches to activate the sprayer solenoid, and the pump itself shuts off at some predetermined pressure so it stays primed.
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

[clonebug]

My first Hobbs switch at 6lbs. activates the solenoid for the nozzle and also activates a relay starting the pump. It's just a extra safety so the pump won't bleed water when not in use. The solenoids keep the vacuum from sucking the tank dry.
Hobbs switches are available online that are adjustable for pressure and your choice of N/O or N/C for around $25.00 each they are well worth the money.
Get the ones adjustable from 2-14 lbs.
Oil pressure switches aren't adjustable and you want to be able to set when they come on.
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[modok]

You can't use one nozzle because the the top half of the system is not made for wet flow, and also because it is made so the water will drain into the carbs, which will screw everything up, so, don't do it.

It is not practical to have four water nozzles.
I think two may be practical, and could be made to work if you build tube "Y" carb hats like this, and locate the float vent way upstream