Ok so what is the best way to do this? I followed the instructions at the Tial website: http://www.tialmedia.com/documents/w..._wginstall.pdf

The only difference with my setup is that I am using the GM 3 port solenoid with the vented port (on solenoid) connected to the top port of the WG. It took me a bit to realize that with this setup, lower duty cycle = more boost which I hope will not pose a problem when closed loop boost control is perfected on the MS1. I also have a manual type (spring + bb) valve I have considered incorporating between the boost signal and lower WG port.

So is this the best possible way of setting it up? Any thoughts on this?

 

This is the standard setup: top chamber of the WG should be open to atmosphere when the solenoid isn't powered, opens to WG line pressure when it is powered. With this setup, low duty = low boost; it's safer than the alternative.

If you have it hooked up so that low duty = high boost, if you have a failure you lose boost control, unless you're cutting fuel/spark in overboost.

 

so do i have the solenoid hooked up backwards or something?

 

Solenoid has three ports, call them A, B, and C.

A: common port, air always flow through this one, powered or not.

B: normally open port (open to A at no current, blocked at high current)

C: normally closed port (open to A at high current, blocked at no current)

Attach a hose Tee to a line connected to the pipe between the compressor and IC, one line of the Tee goes to the bottom chamber of the wastegate (boost pressure opens the gate), the other line of the Tee goes to Port C. Connect Port A to the top chamber of the wastegate. Attach a small muffler to Port B.

You'll have to figure out which port is which on your solenoid, easy to do, blow through each port when disconnected, find port C (blocked), power solenoid and find the new blocked port "A", don't hold current for long though.

This is a high duty = high boost setup, as the solenoid, when powered, is holding the gate closed by sending pressure to the top can of the gate.

 

This is how I have mine set up.




The line that runs downward and is obscurred is plumbed into the compressor housing.

 

Thanks for the clear explanation fluke, and thanks for the picture Pschmidt, its hard for me to visualize by just reading. That is exactly how I am running mine, except I need to move the hoses on my solenoid. I am going to go and figure out which port is which now.

So would there be any benefit to running a ball and spring MBC on the signal line between tee and the lower port? The way I see it is that this would keep the boost out of the lower port during spool, while still allowing boost to enter the top port and push down on the piston. I have just never seen anybody do this before.

 

I wouldn't do this, by the time you've built up enough pressure to crack open the wastegate, the solenoid will be sending pressure to the top can to keep it closed. A good electronic boost controller is all you need.