best thing to do is to get yourself a boost elbow. it attaches itself to the compressor side of the turbo, and you can adjust the allen head to bleed off boost pressure to delay the opening of the waste gate for higher boost numbers.
on some of the turbo's this fitting will not work with out modification. I beleive your turbo is like mine and has a steel line running from the compressor housing to the wastegate (only about 1 1/2 inches long). I pulled that line off the housing and plugged it, I'll see aboiut getting some pics if your interested.