wastegate actuator selection

[andy-m]

I'm going to be replacing my wastegate actuator on my TD05 90°

Does anyone know the standard pressure rating, and as my ECU is mapped to 1.1 bar (Achieving a 1.2 bar spike) then does the replacememt actuator need to be rated at stock, 1.1 or 1.2 bar ?

[bonner]

I was told standard pressure is 0.7, and 0.9 bar on the z4 ecu, surly someone will know for sure and put me right if im wrong why not go for an ajustable? might be a better option?

[andy-m]

I thought it was 0.9, which would explain why the aftermarket actuators are 1 bar and advertised as increasing boost slightly.
My initial thoughts were that the map was based on the std actuator and fuel cut was raised to allow 1.1 bar boost so a 1bar actuator should be fine as far as the map is concerned. My only concern is that of the reliability of the actuator if you apply 1.1 bar to a 1 bar actuator.

[SpecB]

Don't forget the boost solenoid controls the pressure the actuator sees by bleeding pressure therefore I'd stick to the same pressure actuator.

[asperformance]

std actuator will open at approx 0.6BAR...............