I believe I have a 3 lbs wastegate spring and can't go past 6psi. Not sure if I hooked up the vacuum lines correctly this is exactly how I have them. Should I make a line to the vacuum block? If so How?

 

use the intake manifold rather then the turbo housing for boost reference

 

You need a stiffer wastegate spring for starters. MAC solenoids can generally only double the spring pressure AFAIK so you've just about hit the limit of a 3psi spring. Also, something to consider if you re-route to a source that sees positive pressure and vacuum - utilizing any "quick spool" feature in your EMS might cause the wastegate to get pulled open during heavy decel causing a lot of noise and annoyance if you have an open dump.

 

What the other users have stated is correct, 3-port solenoids generally only double wastegate spring pressure. Change the wastegate spring out for a stiffer one (3psi is a bit pointless to be honest).

I don't agree with taking the vacuum source from the intake manifold if you have a choice, the turbo compressor housing is a much stronger source of pressure. If you tee in off the manifold, you have vacuum acting on the wastegate which is counter productive to its operation.

 

I completely disagree. Your best bet is the vacuum manifold for intake manifold . You don't want the strongest source, you want the most consistent source. From turbo Fords, mitsubishi, etc. Intake manifold is the best source overall

But yes, increase your spring on the gate