well for starters your gonna need to probably build your motor up if you havent already... low compression pistons, id deff recommend turbo cam shafts, valves, valves springs, titanium retainers, and cam gears but just saying.. as far as the turbo what are you looking for alot of top end more horsepower which is gonna result or more turbo lag but id look at the garret t3/t40E hybrid for that, or something thats gonna spoil up quicker and still give you good gains get a t3..