SteveStephens

Hi, Came across this by accident. Guess your using 2 Banks of BMW S54 M3 ITB;s ? On the std M3 set up the Stepper motor only works from approx 1800 rpm. The MS S54 DME uses a cold air inlet valve for Idle and low rpm. So the ITB's are shut until around 1500 rpm. [Emissions and idle speed] As this CAV closes under load so the Stepper Motor takes over for the ITB's from approx 17/1800 rpm onwards. In Std Mode its almost linear from Throttle Pedal to TPS on the ITB's and then in Sport Mode its around 75% TPS to approx 50% of Pedal. [ I may still have the TP / TPS graph] Std M3 Throttle Pedal only opens the ITB's to something like 96%. I am looking to do something similar with the M120/ITB's hence how I came across your thread. Regards, Steve.