I cranked my waste gate valve down tight. I'm running nearly 12lbs of boost right now, but I'm thinking of ditching the single turbo setup in favor of a dual turbo set up. One slightly smaller than the other. This will facillitate good boost at low rpm, with it popping at around 3000-4000 rpm and the larger turbo will have had time to spool up and will take over on up to 10,000 rpm.
One of my buddies that did this actually had the knobs on his tires come unglued from the tire case itself. LOL He was throwing these little rubber tire lugs all over the place.