Synapse Synchronic WG & AVCR EBC setup
 

I've done some searches but couldn't find anyone showing their exact setup with this combination. I'm getting conflicting information from the AVCR EBC manual and the Synapse website on which ports to use to control boost.

According to the AVCR manual, I should connect the Normally Closed port of the solenoid somewhere in between the turbo and the throttle as well as to the bottom port on the wastegate. Then the top port of the wastegate should be connected to the COM port on the solenoid as shown below.
http://i721.photobucket.com/albums/w...VCRdiagram.jpg

However, according to the synapse instructions, I should connect the Normally Closed port of the solenoid to the bottom of the wastegate and not connect anything to the top of the wastegate. Then, the Normally Open port of the solenoid should be connected between the turbo and throttle, and the COM port on the solenoid is vented to atmosphere.

Here is the description of the ports for this image from their website.
Port 1 - Control output port
Port 2 - Normally closed inlet port at rest (Cannot blow through to Port 1 when solenoid isn't energized/0% duty cycle)
Port 3 - Normally open port at rest (You can blow through to Port 1 when solenoid isn't energized/0% duty cycle)
http://i721.photobucket.com/albums/w...lenoid_web.jpg

Please help me identify the proper connections. The one from the Synapse website seems incorrect to me because of the COM port being vented to atmosphere. If you only use the Normally Open and Normally Closed ports, I don't think you would ever have boost pressure reach the wastegate through the solenoid. It would have to be the COM to either the NO or NC to have flow through the solenoid right???

You would use the COM and NC on the AVCR solenoid. COM goes to Port A and NC will split between boost source and Port C on the wastegate. Pretty sure that is how we have hooked it up.

The instructions from the Synapse website has you hooking it up in "venting" style, as used on an internal wastegate and some external gate configurations. Pressurized air will flow from port 3 to port 2 normally. When the solenoid engages, port 3 will close and air will flow out from the wastegate and vented through port 1.

The other configuration described by the Apex'i instructions has steady pressure pushing to open the wastegate valve, with the solenoid providing air to push the wastegate shut.

The two configurations have a little bit different response characteristics, but for the most part you can usually get the same final result. The configuration described by Synapse is probably going to be less prone to spiking depending on other factors. The configuration described by Apex'i might hold boost a little better because it fights exhaust backpressure on the valve.

Boost Source?
 

When you say boost source do you mean between the turbo and throttle, or off of the UIM?

Thanks again.

Bump ???

Typically we take it off the turbo or we put a nipple on the intercooler pipe coming off the turbo.

^exactly...as long as it is before the intercooler.

Drew