D.I.Y. Intercooler Sprayer
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This is a discussion on D.I.Y. Intercooler Sprayer within the Engine Performance forums, part of the Tutorials & DIY category; Here is how to make your own Intercooler water sprayer. For a lot less $$ then what you would pay ...

  1. #1
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    Post D.I.Y. Intercooler Sprayer

    Here is how to make your own Intercooler water sprayer.
    For a lot less $$ then what you would pay if you bought it from STI or another after market Co. First lets start with what you will need. I got all of the stuff from Pep boy's....yeah, i know but at least I was not buying ghetto wheel covers or AC1 clear tail lights LOL.. Except for the micro switch which I got from Radio shack.

    You will need:
    1. bottle/ windscreen washer reservoir (I used a universal coolant over flow bottle)
    2. A windscreen washer motor/ pump ( I used a universal GM model, washer motor)
    3. A toggle switch, you know...the on/off switch (your choice here, pick what you like)
    4. Wire and connecters
    5. Vac. line (about 4 feet)
    6. T. Fittings (for the vac. line, plastic ones are fine)
    7. A 10 amp micro switch
    8. Windscreen washer nozzles (2)
    9. Wire loom

    Now on to how to install it all.

    Ok so here we go, first you will need to find a home for all this stuff.........this is the hard part. I have a Injen C.A.I. so for me I mounted the reservoir tank in-between the intake and the boost control control selnds. (there is just enough room) and then mounted the windscreen washer motor to the side of the motor bay right next to the reservoir tank. You may need to find a diff. location for the reservoir tank if you still have the stock intake.

    Next you will need to run the wiring and mount the on/off switch. To do this you run a wire off the + side of the washer motor to the + terminal of the Batt. Then off the - side of the washer motor you will run a wire into the cabin and to the + term. on the micro switch.

    You will need to mount the micro switch on the throttle (you may need to make a bracket to hold the switch). Then off the - side of the micro switch run a wire to the + term. on the toggle switch.

    You can mount the toggle switch where ever you like, I mounted mine in the console in-between the driver and passenger seat. There is a cut out witch you can pop out. Then you cut a hole to put the toggle switch in. Once you have mounted the toggle switch you need to run a wire off the - term. of the toggle switch to a ground on the chaise of the car.

    Now you are done with the wiring part of the install.

    Now you need to run the lines and mount the nozzles for the water.

    First you run a line from the reservoir tank to the washer motor. Then from the washer motor you run a line to a T. adapter which you should mount up by the hood scoop.

    Now you have to drill 2 holes to mount the spray nozzles. You can see on the bottom of the backing plate 2 places to do this. They are both toward the outside of the scoop they angel back away from the scoop. I used a round drill bit and just kept going up in size until I got the right size. It is better to start small then make the holes to big.

    Once the holes are drilled and the nozzles mounted you just have to run 2 lines off the T adapter to the spray nozzles.

    Now use the wire loom to hide all the wires and you are done. Go back and check all the connections and fittings then fill the tank and you now have a intercooler sprayer that cost you about $50.00 instead of about $300.00

    Enjoy
    2002 MBP WRX

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  3. #2
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    any pics???

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    Sil Rex
    Sorry no pic's I do not have a dig. cam. I realy need to get one of thoughs.
    2002 MBP WRX

  5. #4
    Registered User Shard's Avatar
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    Explain to me the use of the micro switch please. What is one etc? Sorry for the ignorance Also why on the throttle?

  6. #5
    Banned jedimaster's Avatar
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    Any real benefit to a sprayer? Seems to me that if it's hot enough to make a diff in hp, then you'd need a lot of water to cool the intake charge back down- maybe there's just a lot of bling effect?

  7. #6
    Registered User is2scooby's Avatar
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    It works well enough that Subaru threw 'em on the STi. Having said that - I don't know anyone that has really used one to determine what type of positive effects they received from it.

    Personal experiences, anyone?
    Aloha, Richard...
    Retired Moderator
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  8. #7
    Moderator fengshui's Avatar
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    Originally posted by returnofthejedi
    I'd like to throw one in, but I'd like to use the switch from the STi- can that be done without using all the STi parts? In other words, I'd like to make my own, but use the STi switch.
    yes, just order the single switch and it should include electrical schematics for wiring it up. You just need to make sure the switch is wired in series with the washer pump and you should be all set. The switch blank mounts in one of the dead switches in the dash.

    chris
    Moderator: Retired
    2002 Subaru Impreza WRX Sedan 5MT - Road Rally - Best 1/4mi: 13.954 @ 97.36mph (3448 lbs)
    2001 Mazda Miata 5MT - AutoX #99 (NNJ Region SCCA 2005 CStock Champion)
    1988 BMW 325 (2.7L "i" conversion) Sedan 5MT - Daily Driver (AutoX soon!)
    "If you can't drive this car fast you can't drive fast." --British Magazine, CAR, on the WRX

  9. #8
    Registered User racerWRX's Avatar
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    Originally posted by -=[JJFA]=-
    Yes, this subject sounds interesting, indeed.

    has ne1 notced a pattern here ???
    have you ever been 4 bagged ???

  10. #9
    Registered User capt'n'caveman's Avatar
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    Originally posted by is2scooby
    It works well enough that Subaru threw 'em on the STi. Having said that - I don't know anyone that has really used one to determine what type of positive effects they received from it.

    Personal experiences, anyone?
    yup.....some guy over at nasioc, over a yr ago did all kinds of testing w/the temperature on the intercooler...and found that the spray does indeed lower the ic temp, dramatically

    i have a smart systems pretty much design in my head, but am too lazy to build it and get all the parts, hehe
    k&n, sti-hoodscoop, engine mounts, & tranny mount, blitz dtt, catless up-pipe, samco ic hose, greddy CC, cusco f/r swaybars, gutted midpipe, oil cooler, prodrive exhaust & f/r replica sti strut tower bar, gunmetal rota tarmac, goodridge ss lines, p'n'p exhaust manifold

    deny the fly-by

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    Got my setup going pretty well. I haven't gotten to take it to the track yet but i'm hoping for some more consistency in my runs. I think heat soak effects all of us with TMIC especially stockers.

    Here's the link full of pix and a reference to where i found out how to do this from an awesome guy on wrxhackers.com

    http://www.hrstudios.net/dwyer/icspray/icspray.htm

    Here are install instructions from quantum racing for their kit.

    http://www.quantum-racing.com/Quantu...Directions.htm
    Last edited by xylem007; 09-18-2003 at 10:58 PM.

  12. #11
    Registered User JRod's Avatar
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    Does anyone know where to get garden spray nozzles? I looked at Home Depot and Sears, cant find them anywhere. I just want something that will give me a fine mist.

    I have everything else all set up;

    -old legacy washer bottle and pump
    -lines
    -UTEC (for switch)
    -custom homemade TMIC seal
    2002 WRX Sedan-Silver
    Turbo XS UTEC Stage IV (VF34)+TMIC, STI RA gears, Exedy clutch/flywheel

  13. #12
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    i found them at walmart and they were in the home and garden section third aisle at my store. Orbital Mist something is the name of them or just order the sti nozzles

  14. #13
    Registered User JRod's Avatar
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    Originally posted by xylem007
    i found them at walmart and they were in the home and garden section third aisle at my store. Orbital Mist something is the name of them or just order the sti nozzles
    Thanks!
    2002 WRX Sedan-Silver
    Turbo XS UTEC Stage IV (VF34)+TMIC, STI RA gears, Exedy clutch/flywheel

  15. #14
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    (OT) Jrod, how is your stg4 w/tmic everyone keeps telling me FMIC FMIC you get TMIC now and you'll ebay it and get FMIC next spring... Bla bla... Do you get heatsoaked 24/7 like b4 w/stocker TMIC?

    Did you run your vf34 b4 the TMIC went on? I'll be doing this next week and i'm wondering if you had any special utec maps or tips to watch out for running it with out a upgraded tmic?

    (/OT)

    BTW if you get the ones that are called orbital something get the part number referenced off this site

    http://www.dooleyprinting.com/brsc/ic_sprayer.htm

    PN# 61032D - Orbit Drip Master Mist Sprayers (2) - $1.97 x2 - $3.97

    I wouldn't put all 4 in i don't see the need for it you'll spray hecka h2o with just 2 nozzles maybe get the 4 just to have 2 spares or something.
    Last edited by xylem007; 09-19-2003 at 07:54 AM.

  16. #15
    Registered User JRod's Avatar
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    Originally posted by xylem007
    (OT) Jrod, how is your stg4 w/tmic everyone keeps telling me FMIC FMIC you get TMIC now and you'll ebay it and get FMIC next spring... Bla bla... Do you get heatsoaked 24/7 like b4 w/stocker TMIC?

    Did you run your vf34 b4 the TMIC went on? I'll be doing this next week and i'm wondering if you had any special utec maps or tips to watch out for running it with out a upgraded tmic?

    Thanks for the part #

    I ran the VF 34 with stock TMIC in the winter so I didnt have any issues with heat soak. I just ran the TXS stgf IV base map. When I first put the TXS TMIC I ran the txs stg IV TMI map and it ran great. I would get some serious heat soak on real hot days if I sat at some lights for a long time. The passenger side of the TMIC would get really hot due to the stock size IC shroud.

    I have since modified my shroud to feed cool air to the entire surface and no longer suffer from heat soak (unless the car is parked with a hot engine) Feels cool to the touch on 90 degree days, even from stoplight to stoplight.

    Now I am doing the DIY water spray mod which will allow me to tweak the tuning even further for my hot weather UTEC map.
    2002 WRX Sedan-Silver
    Turbo XS UTEC Stage IV (VF34)+TMIC, STI RA gears, Exedy clutch/flywheel

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