Red Line Magazine Sept 2007 issue, How to tune a 3sgte Options

[kcizzle]

I want this engine! -- drool --

This post has been edited by kcizzle: Feb 5, 2009 - 7:12 PM

[nsxtypeR]

Some more info about the ST205wrc water injection:

This info was posted to our Dutch celica forum,

I began driving my ST205 WRC in January 2005. The only problem that I had with the car was that every time I filled up the windscreen washer water bottle, the water simply leaked out of the bottle all over my driveway!

So on Easter Monday (28/3/05) I decided to remove the washer bottle from the car to find the cause of the leak (I guessed that the problem would be a cracked bottle). This would also give me the opportunity to investigate the water injection (WI) and spray bar components on the WRC which I already knew a fair bit about from reading Dan Johnson's site (http://www.st205.net/).

Once I had marked up the various water lines, disconnected them and removed the washer bottle, it was easy to see the water injection motor, water spray bar and windscreen washer motors. Unfortunately I could not see any cracks in the washer bottle or lines, so my leak was obviously not coming from there!


As the bottle was out of the car, and the motors easy to get to, I thought that it would be interesting to test the WI and spray bar motors to see how they worked. I connected some wires to the terminals of the motors and then connected the wires up to the 12v car battery in my ST185CS.

I did some fiddling around, tested the battery and wires etc. but I could not get the motors to spin over or show any sign of coming to life. So I concluded from this that the WI and spray bar motors on the ST205WRC are DUMMIES! Although the motors have wires and connectors, they probably do not have any electrical innards. This is a real shame!


Undeterred, I decided to carry on investigating the various WI lines.




WI lines 1 and 2 both travel from the WI valve shown above, up inside the wheel arch dust cover and into the engine bay near the drivers side shock turret. Both lines then run along the standard strut brace and between the two middle chambers/runners of the intake manifold.




WI line 1 then separates from line 2, where it travels under the intake manifold plenum chamber and into the WI sprayer located in the throttle body, just behind the throttle butterfly (shown below).




WI line 2 (shown below) travels downwards in front of the intake manifold, then it goes into a T piece. One of the lines out of the T piece then connects into a fitting on chamber/runner no. 1 of the intake manifold (which I presume is just blanked off/a dummy fitting).



The other line out of the T piece drops down under the head of the engine and into a dummy fitting in the centre of what my EPC called the Idle Control Valve.