After driving with my synapse for a month on the solenoid and far longer off the manifold...I will never go back to solenoid. It would pop the BOV at about 17 psi for no reason at all (Yes I was well above oil temp, and normally I run about 22/23 psi with my mods...got lucky with a monster from the factory I guess?) and sometimes would even pop it off while accelerating and then close and pop off etc...very annoying.
I also hit overboost limp mode 4 times while on stock solenoid due to the bov not releasing quickly after I let off the throttle after a hard acceleration...like it couldn't open the synapse fast enough or something. Ever since I switched to the manifold I've had zero problems.
I have mine hooked up with only the B tab...synapse confirmed in an email to me that you can hook up A and B but B is what they recommended for fastest release with my setup (Off the manifold). Tho they mentioned that they recommend that for the solenoid setup too.
2013 Tsukuba Red Auto 2.0T
Evolve Charge Piping
Evolve Race O2 Housing
Evolve Quad back Catback
Evolve Intake w/Vibrant Filter
Kahtec Brake Light Mod
Saikou Michi Dual Catch Can
Jcs gauge pod
Prosport Evo Gauges (Wideband, boost, oil temp)
Aluminum manifold with grimmspeed love