Quote:
Originally Posted by cntzl
This "lack of low end kick" issue is probably just because of the different tune. In other words, it's all software and not necessarily a bad thing. With the earlier versions S55 software in M3/M4s, there were several complaints about high torque available very early on hence affecting the power delivery and traction (unless you ran wider, stickier tires). Take a look at the dyno graph below showing torque (y-axis) vs engine speed (x-axis):
In this comparison, there are 4 different cars: Non-ZCP M4 with 2016 software, Non-ZCP M4 with 2017 sw, M4 ZCP with 2017 sw, and M4 CS with 2017 sw.
Based on the graph Non-ZCP M4 with 2016 sw and Non-ZCP M4 with 2017 sw make pretty much the same peak power. What's interesting is that the peak torque comes at about 2500rpm on the 2016 software whereas 2017 software delivers the peak torque right after 3000rpm. Also, 2016 sw makes 50-100lb-ft more than 2017 sw up until 2700rpm.
If you look at the F80 forum, many members who got a software update about ta year ago initially thought that BMW reduced the power in their cars and their cars became slower. However, it wasn't the case in reality. As someone who had experienced the both software versions, I can tell you that newer software resulted in much better power delivery even though it felt like you lost some low end torque. Long story short, I believe this is the case with M2C as well.
Also, anti-lag capabilities in Sport and Sport+ modes of M3/M4 are all thanks thanks to ECU software (you can read more about it here) and even if the M2C tune/software is lacking these capabilities, there is nothing a M3/M4 flash tune can fix  |
Yep, it's likely the feeling is from throttle mapping being changed to be less aggressive.