ok since I'm replying to my self... I hope it at least helps r33 racer
Well... it seems I have the Boost Control Kit wired correctly, except for the plumbing... This is what I'm still trying to work out.
I did some reading and found out I can't just swap boost solenoids.
My BCK boost solenoid did not have to get wired in to the pressure sensor wiring, it pluged in to a harness that pluged in to the factory solenoid plug.
here is something I found: (it's for the avcr, but the solenoid plumbing is the same)
got it from here:http://www.gtr.co.uk/html/docs/apexi_avc.zip
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This guide will contain some photos of the installation process, for ease of photography I will remove the induction kit and the top intercooler pipe.
It is a good idea to have a good look at what you are going to do before you start cutting things. Get it straight in your head where abouts you will be connecting to.
Making room.
This job would be a hell of a lot quicker if there was some space around the engine so step one for me was to make some space.
I removed the induction kit past the Airflow meters, the Intercooler feed pipes and the manifolds that the turbo outlets run from. This gave me a bit of elbowroom and made it a little bit clearer for some photos. If you are not documenting the steps, and now I have done it once, it can probably be done by just removing the pipe that connects the intercooler hard pipe (through the bodywork) to the turbo outlets. (The bit with TWIN TURBO written on it) this gives access to the front actuator.
The wastegate actuators look a little bit like a piston and are bolted onto the side of the turbo, there is a rod coming out of the unit connecting to the actuator arm (a bit like a push rod in a radio controlled car)
To find the connection points follow the pipes back from the actuators. This will lead you to a brass pipe that runs down the side of the engine behind all of the turbo outlet assembly. This pipe runs from the Plenum chamber around the back of the engine and then to where you can see it. Near the back turbo on the engine side there is a tee in the pipe which feeds the rear wastegate actuator, this should be removed and a new length of pipe put on to it. The other end of this plugs into the other end of the brass pipe near the front wastegate actuator. There should be a tee piece inserted into the pipe near where you will place your solenoid valve. This pipe then plugs into the NO port of the solenoid.
The COM port is fed from a pipe, which is run between the two wastegate actuators them selves. These are connected together and then teed off in a similar place to the NO pipe.
The point indicated on this picture feeds the NO port the other end of the STD pipe goes to the actuator and is re routed to the COM port line.
The COM side of the installation this plug fits to the rear wastegate actuator.
Next we need to fix the Pressure sensor to the fuel pressure regulator. The small pipe that goes to the fuel rail from the pressure regulator is a convenient place, so cut this and insert the tee piece. The pressure sensor is located on the fuse box cover and mounted like the instructions recommend (vertical) the filter was put in to the line and the unit screwed to the flexible fuse box cover. (Another plus with using this location is that it is fixed to the car on the pipe so you can’t remove the cover and then forget it.
The fixing location for the pressure sensor (with the filter fitted)
Note the Pressure sensor feed pipe with the Tee in.
You can now put the car back together.
The solenoid valve was located by the induction kit and mounted facing forwards.
Disabling factory boost.
The factory boost controller is located on the left-hand side of the bay by the fusebox. It is about 20mm in diameter with a length of around 40mm there is a plug going into it and two pipes, one on the side and one in the middle at the bottom.
This unit needs to be removed and the bottom taken off. There is a spring inside and this needs to be removed. (Unless your car has already been mapped to 1 bar then this will have been done)
Then put the unit back together and re mount it. The pipe with the yellow bar on it which mounts to the side of the unit needs to be plugged (push a screw into it) then the pipe is reconnected.
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I've been waiting for a reponse from someone else who claims there's an easier way that this, that would be able to keep the BCK boost solenoid near the stock location. I'll post back.