Ive been fighting the exact same problem for awhile now, but im using OS. About a year ago when I had a 20G on the car, I could rev as high as I wanted to. Once I started doing bigger turbo setups, thats where it started. It just doesnt go past 7000rpms whether im in neutral or in gear. All the DBW settings are exactly the same as when I had the 20G. Its starting to get me pretty stumped.