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Old 03-10-2006, 01:49 PM   #1
Token-Negro
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Join Date: Feb 2005
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Aspen White / Silver

Default My DIY System

With this new forum I wanted to give some an example of a DIY system for the WRX I put together pretty reasonably.

Well my car is setup with an Ecutek reflash so it has no built in ability to activate the WI so I went the route of using the Cooling Mist Boost Pressure switches, I wanted to have dual stage so installed two of these and set the levels on them at 10psi right above the WG only boost, and at 15psi. The car is tuned for 22psi total boost.


This is the pillar setup I installed, from the bottom up we have a gauge I know it says AIR pressure but really this is the water pressure of the system. Its set for a max of 100psi and drops to a low of 75psi before the pump comes back on. The red led is the low water indicator this is from the stock STI intercooler spray tank in the trunk. Next is the boost gauge the bottom light on this tree is when the pump is working and should be green along with the pressure going back up. The 2nd green light is the first stage opening up, the third light is when the second stage starts. These lights are wired into solenoids that are set closed until they get a ground from the Boost pressure switches.

You can see the solenoids in this picture along with the jets used.

The solenoids are also from coolingmist. I used high pressure tube used in air systems for the whole system it is accepted by the Washington State DOT so I figured it would be good enough for this project. Great push on style connectors. The water supply line teeís off to supply both solenoids adequate water. Then they run to the IC piping. Iím using the Auquamist jets as I found they are by far the best out there. The spray pattern is very fine and continuous and with the 25psi variance in pressure I found the spray to not deform greatly before the pressure came back up.

As for the pump im using the Shurflo 100psi 1.8 gpm along with an accumulator also from Shurflo so when the pump does come on the flow dose not spike the water jets. So far the system has worked very well and the car was tuned to 310whp with a FP 18g turbo with supporting mods by PDX tuning. There are many ways to add a safe guard to the system but what I have noticed is that when the light for the stage comes on the pressure needle on the gauge will fluctuate so I know for sure the solenoid opened up. In case of some system failure the D-tec allows me to turn boost to WG pressure witch is lower then when the WI system starts activating.

I just wanted to post up another way of building a system for your car.

Kendrick
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Old 03-11-2006, 04:58 AM   #2
Richard L
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Default useful addition

Quote:
Originally Posted by Token-Negro
With this new forum I wanted to give some an example of a DIY system for the WRX I put together pretty reasonably.


... In case of some system failure the D-tec allows me to turn boost to WG pressure witch is lower then when the WI system starts activating.

I just wanted to post up another way of building a system for your car.

Kendrick
Have you can consider the Aquamist DDS3's "flow monitoring management" capability that will perform all the "failsafe" work behind the scene automatically as well as many useful functions all in a small package.

Very neat installation!

Richard
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Old 03-12-2006, 01:06 PM   #3
entropy138
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Default

What size jets did you use?
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Old 03-12-2006, 01:13 PM   #4
Token-Negro
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I used 2 .4 Jets, and reply to Richards post i was trying to keep the costs down, as getting individual parts from auqamist is very expensive.
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Old 03-12-2006, 01:55 PM   #5
spooledwrx
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Quote:
Originally Posted by Token-Negro
I used 2 .4 Jets, and reply to Richards post i was trying to keep the costs down, as getting individual parts from auqamist is very expensive.
Ever since we talked last week and you told me what the FP feels like, I
am really considering buying one : )
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Old 03-12-2006, 02:28 PM   #6
tasq
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what was your reason for running 2 jets?

edit: looks like an FP green under there? That might explain it

Last edited by tasq; 03-12-2006 at 02:34 PM.
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Old 03-12-2006, 02:32 PM   #7
Token-Negro
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Default

Quote:
Originally Posted by tasq
what was your reason for running 2 jets?
Runing two jets would allow me to better match the cars need to the demand, and give me some overlap. Idealy matching the amount of water to the injector duty cycle would be the best over all solution. But in this case we set the WI up then had the tuner tune to the amount of water we had flowing to the motor.
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