I know a guy in nz doing a 400hp version. Big turbo + injectors + rods + ecu work is all that's needed. The engines can do double that.
http://i290.photobucket.com/albums/ll27 ... 0020-3.jpg
We are doing some timing on Friday, cant find any of my old time's though. Should be heaps of video footage from the day also.
Im going to build a 300hp 1.8t screamer in the next few years, goal is 850-900kgs