squidge if you want to raise boost, you gotta make sure the fueling is right to do this you need either an ecu like your dastek and get it mapped, or the cruder cheaper way of gettin a fuel pressure regulator, and a hks or smiliar fuel cut defender. Then you need to visit a tuners and get them to setup and check all is fueling fine or just put it on wideband. As jay said its important to understand more about components before fitting or playing around with them.
It wont cost much at all to get it sorted/checked on a fpr & fcd. What mods do you have currently? 200bhp can be achieved on the stock turbo but theres more to think about than just upping the boost
Your uni chip should remove fuelcut.