Gave my AGU a full service including cam cover gasket plugs etc this week so i took the car to Badger 5 to get it rolling roaded and full diagnostics to make sure its running right as its got 122,000 miles.
Was really dissapointed it only managed 170ish on the rollers with similar torques. Same setup in a mk2 the week before achieved 190 (different map though but both generic). The vac hoses have all been replaced for forge silicon ones and there are no boost leaks... as far as ive ever come accross including checking today...
Put it down to a worn turbo as peak boost was 12 PSI and after running every log possible on the AGU the car itself is telling everything to run at 100% (pushing everything to achieve max boost etc). So that rules out n75 etc... MAF, coils and all that jazz are running spot on and the car is fueling perfectly.
Verdict right to be a new turbo needed? (likely impellors worn or something?)... or should i look start looking for other things?
KO3s time me thinks? Ive been told that as my cars running well etc i may get away with a KO3S and a forge boost controller and it'll be fine without a map. (obviously a map would get the most of the setup).
Forgot to mention... MODS are forge 007p, cat back exhaust, k&n filter, DSG intake (off the top of my head).