I think you are confused unless you have a bigger turbo a stock turbo will start spooling in the 2100 - 2400rpm and I think full boost by 2600 - 2900rpm.
Also if you are going to get a boost controller with only having an exhaust I would not run any more than 8 - 9psi. Also you say you have an exhaust but I will put money its just a cat back get a good dump pipe and high flow cat that will help the turbo spool up a little quicker.
Then get a good panel/pod filter, FMIC, cam gears and possibly an aftermarket ecu or piggyback. Then up the boost to 11 - 12psi. Some say you can run more boost but A: you wont see much if anymore power and you will probably add yourself to the list of blown turbos pretty quickly. I am only running 11psi with all of the above minus the cam gears as I would like to see my turbo last and still be in good condition, but then i am a big girl and am over cautious with my car