usually if u have turbine or piston probem it is because of not enuff fuel. my car is using td04 turbine and i use it for daily drive. i set the boost at 1.5 bar for daily use short and long distance. it could go up to 2 bar max. to make sure that ur car can give enuff performance at hight boost and also can withstand the pressure. fuel, air and also cooling system need to be given serious attention. change to a low compression piston, it can withstand high boost. really work for me. and also change ur fuel pump, fuel injector, and also add a fuel regulater for that extra umphh!!!... lot of people just change the 'big' part without giving attention to the 'small' parts that really does support the 'big' part. to me that is the major problem with 'modders' nowadays. just giving my opinion based on my experience.