Okay, i think we have here record from d24tic:
187kW, which is 254 horsepowers!
Theres no torque-numbers since on that powerbench hasnt option to take out RPM's from diesel-engines.
By calculating max. newtons are something about +400nm's.
Recipe was Holset HX35+ 12mm distributor head+ some minor tricks.
Oh, almost forgotted. Also, Jason, M90