That torque curve is absolutely horrible!! I mean, your peak torque is right at 5000 rpm's. It's like you put a turbo on a 4cyl car.
IMO you need to get that retuned, and get the a/f ratio around 12.0 - 12.5. The spark timing must be completely out of whack. What RPM do you reach max boost? Does it stay there until 6k?
Not dissing, just sharing your disgust w/ the numbers it put down.
Scott