Got my DIY intercooler spray kit.

[boostjunkie]

Comes with the following:
Watertank (smaller than the stock watertank)
3 nozzles (although I have the STi nozzles coming in sometime next week)
hose
push button switch
pump
wiring

The problem is finding a place to mount the water tank. I was thinking maybe in the trunk, but I'm afraid the pump isn't powerful enough to send the water all the way to the engine bay.

[entirelyturbo]

Looking at your engine bay, will the tank fit behind your strut towers? I always thought that was some perfectly good space going to waste...

[boostjunkie]

I checked there last night, but there really isn't that much room to work with there, even with the small tank I have. The only place I can see from looking at the car is just above the turbo, and I don't think the plastic tank would like that too much.

[entirelyturbo]

Yeah, aside from the possibility of melting the tank , the water would heat up to a point that would make the whole thing useless...

I understand your concern of having the tank too far away, your purpose in installing this is to get an extra bit of juice at the touch of a button...

Where is the tank on the Impreza STi's?

I'm looking in your engine bay, and I see few options... Is there space from the bellhousing to your I/C? That would be immediate response...

[vrg3]

In the OEM setups, I believe the tank goes behind the rear seat. It's a really big tank, and the pumps are really strong.

You might need to use a different kind of pump, or maybe two pumps or something; you want to avoid putting a lot of extra weight over the front wheels of your car.

[boostjunkie]

vrg3 is correct, the STi's have the reservoir behind the rear seat. Hmmm, perhaps in the glove box? The tank might be able to be fit in there. The only problem is filling it.

[IggDawg]

why not tap the washer fluid tank? it's alchohol, so it'll evaporate (absorbing much more energy than just liquid warming up and staying liquid) and there's tons of it right there.

[boostjunkie]

I have no idea why I didn't think of that!! I'll have to take a look to see where I can tap the smaller pump into the system.

[IggDawg]

Here's the one MRT sells. they pitch it for $250 AUS to rip off the WRX n00bs, but here's the picture for some inspiration:

[boostjunkie]

Interesting . . . that picture will definitely help!

[vrg3]

It looks like the MRT kit uses an adapted windshield washer reservoir. The early intercooler sprayer systems on WRXs did actually just use the windshield washer fluid.

The current OEM intercooler spray tanks (at least the ones I've seen) are really big though, much bigger than the windshield washer reservoir. I'd guess they hold 3 to 4 gallons maybe.

[boostjunkie]

Might have to peruse the local Home Depot again to find a reservoir a little bigger than the one I have. Hmmm, would they have larger water pumps that aren't too big?

[ciper]

From what I know that is the STOCK WASHER RESOVOIR FOR WAGONS of certain years.

90-94 legacy had a front resovoir and a rear while 96+? had a single one, the "upper" pump is for the rear, so when fluid is low front will work but rear will not.

[-K-]

How about a valve so you could switch the washer fluid to the windshield if needed, that way you only need the stock washer pump.

[JasonGrahn]

It would be safe to mount the watertank in the trunk, just mount a couple of one-way check valves along the way and that will make sure that water stays in the line ready to spray.