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.