Quote:
Originally Posted by XutvJet
Thank you so much for taking the time to write this up.
This utter POS CDV makes normal driving with the 6MT needlessly jerky and clunky. I've been driving manuals for three decades now and this is by far the most difficult manual to drive smoothly. The CDV really makes you have to think about clutch modulation and it can make the catch point move around a bit. It's as if BMW intentionally added this device to push people towards buying automatics. I've owned this car for 3.5 years now and it is by far my biggest complaint with my M235 6MT (same tranny as the M2).
The intended purpose of the CDV is to reduce hard shift shock and drivetrain damage on hard shifts. Oddly, when driven in anger, I find that the 6MT is exceptional. I can slam gears hard with a nice firm and direct shift and engagement. I can tell the clutch is robust and sometimes a strong clutch can make engagement difficult, but the CDV is the main culprit for the issues I have.
I've learned that the smoothest way to shift is to delay the 1-2 and 2-3 until ~3,500rpms. Shifting earlier than that makes it difficult to execute smoothly. Shifts 3-4 and above aren't a problem.
The CDV delete is high on my list. I do worry about the bleeding though. Seems like a pain.
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I've found short-shifting at ~1.5k RPM 1st to 2nd is pretty smooth. Anywhere between 2k-3k RPM is extremely jerky unless I wait a good 1-2 seconds for the revs to come down (which causes the car behind me to end up right on my bumper because they don't expect me to stop accelerating for that long).