Ok so controling boost with the stock solenoid is possible, by adding a pill with more restriction,

Now another quick thing to do is to pull the restrictor pill runing to the stock BCS,

I was wondering if somebody could just show me what your Max wastegate duty cycles maps are set to as well as desired engine load, turbo boost error correction, and load offset.
Somebody that just pulled the pill out runing to the BCS, and set their boost up that way.

I'm not asking for a map, im just asking for those 4 things and what you guys have them set to,

i want to compare them to mine and see how you set the transitions, Because i can get boost to hold at 21, but every once in a while it will drop off to 16, then shoot right back up to 21 on the way to redline.

 

Get an electronic boost controller and be done with it.
Much more consistent and easier to adjust on the fly.
I had enough tinkering around with mine.

 

If you have just removed the pill, then max out MWGDC -- I believe this is 127.5....You should be able to hit ~22.5 psi doing this.

I have an inline bleeder (to the BCS) and can hit much higher boost so my MWGDC settings are much lower.

 

outside of the other answers here, you should search. There are several key threads discussing this.