You got a LOT to learn son. If you are only running a downpipe and not a full 3" turbo back exhaust, messing with the wastegate to get the target boost is BAD JU-JU. You probably won't get the true full boost until you get a full 3" TBE. Quit trying to reinvent the wheel before you blow something up! Cobb sets forth a mod path.....STICK TO IT!!! Realize that without a 3" TBE you won't see the full potential and trying to force it will only make things worse. Get some knowledge and start modding smartly.