How should i go about hooking this up the proper way?

Right now, I have my 3 port solenoid hooked up exactly how the perrin instructions say to hook it up.

http://i267.photobucket.com/albums/ii298/kadesullivan/EWGdiagram.jpg

I have a solenoid from labonte that accepts a 12v signal from the flow monitor if flow drops below a certain point. That way it activates the solenoid, effectively separating the BCS from the EWG. My only question is where exactly to put it on that diagram.

I was told by my tuner to just hook up the EWG like an IWG and treat the SIDE of the wastegate as the wastegate actuator.

http://i267.photobucket.com/albums/ii298/kadesullivan/IWGdiagram.jpg

He said to put the failsafe solenoid between the BCS and the Side of the wastegate. Wont that just make me boost into oblivion instead of limiting boost to wastegate pressure as intended?

I'm not 100% sure i understand exactly how an EWG works and wasnt able to find a simple explanation online. If the EWG is totally unhooked from the BCS does it limit you to spring pressure, or does it let you boost into oblivion? I would just test this myself, but it's pouring down rain.

Also i have a dom tune solenoid, and not a perrin solenoid, but they look identical, so im going to assume that they have the ports set up the same way, since my setup worked perfectly installed the same way as their install diagram.

The way perrin says to hook it up seems more complicated, but I have had great boost control hooking things that way. I'm leery of changing the way it's hooked up when it works perfectly as it is. This is why I'm asking what nasioc thinks. It will be a couple weeks before I get protuned, but I have decent success tuning my own car for a while now, and I'll be playing with the setup myself up until I go get protuned, which is why I want to fully understand everything. Plus, if i change how the BCS is hooked up, I would assume i'll have to retune my boost again. I've spent quite a bit of time dialing in my boost curve to get it exactly where I want it, and would like to avoid doing this all over again prior to getting tuned.

What Would NASIOC Do?

First, keep your setup how you have it as show in your first picture.

The two ports on the EWG create opposing pressure on the valve to keep it closed under boost. Your Perrin solenoid will "bleed" off boost pressure through the unconnected port to lower the pressure at the top of the EWG. When this happens and the pressure at the lower port of the EWG is greater then the combined force of the internal spring and pressure at the top port, the EWG will open and turbo boost will be reduced.

You will install the BBK as shown in the attached diagram. The silver hose barb of the BBK goes to Port 1 of your Perrin solenoid.

In normal operation the path through the BBK to the top port of the EWG is open and lets the Perrin do its thing. If the IFS detects a fault, it will energise the BBK. This takes the Perrin out of the loop by closing the path through the BBK and the BBK will vent the pressure at the top port of the EWG.

Now any boost the turbo makes works against the EWG spring and the WG opens.

Hope this helps.

Best regards,

Dan

I think since you created the BBK, I'll go with your way of hooking it up. That makes the most sense to me and allows me to retain my current boost settings.

Thanks for the reply.

Bumping an old thread with good info rather than starting a new one. I have the same Perrin Solenoid and a BBK-10, however since I bought it used I don't have the installation guide. My Perrin is setup in interrupt mode. How do I hook up the BBK-10 correctly?

Thanks,
Koji

Bumping an old thread with good info rather than starting a new one. I have the same Perrin Solenoid and a BBK-10, however since I bought it used I don't have the installation guide. My Perrin is setup in interrupt mode. How do I hook up the BBK-10 correctly?

Thanks,
Koji

Can you explain what you mean by "interrut mode"

Best regards,

Dan

Sure thing!

http://i293.photobucket.com/albums/mm54/koji00/Boost.jpg

You can't see the numbers very well so:

Port 1: Wastegate Actuator
Port 2: I have this plumbed back into the Turbo Inlet Pipe
Port 3: Turbo Compressor

For anyone else who searches and finds this thread:

Unlike the stock Subaru bleed type system, interrupt style with a Perrin or similar 3 port solenoid actually blocks the pressure entirely. Blocking the air entirely until you have achieved target boost makes the boost build fater than in a bleed type of system. The only way you can really make boost faster is to pressurize the WG actuator on the other side to blow it closed which you can't really do unless you have a WG with a second port. Subies don't have these so this is the best you can do.

The setup should be very simple - it's just without the install guide I have no idea if the solenoid you guys use is setup the same way as the Perrin so I don't want to connect the plumbing till I do know.

Bump for help. If anyone has the BBK-10 Manual I'd appreciate it if you emailed it to koji_r@hotmail.com.