Calling all tuners! Does the M button manipulate the wastegate duty cycle?
A while back there was an interview with the head of M GmbH on the F10 M5 and he mentioned that in that car as well as the 1M, activating the M button on the steering wheel kept the turbos spooled at an optimum RPM for quicker boost.
So just as the title asks, have you guys seen a different wastegate duty cycle when tuning the 1M with the M button activated? I figured the tuners are the best people to ask since the 1M's high flow downpipes were discovered via lower wastegate duty cycles during some dyno runs.
Last edited by ZCP M3; 10-02-2012 at 11:30 AM.