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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Weird knock happens after shifting, 6MT Multimap Stage2+

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      08-24-2023, 03:24 AM   #1
ericlr1225
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Drives: 2018 M2 LCI 6MT
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Weird knock happens after shifting, 6MT Multimap Stage2+

I've been running multimap stage 2+ for 4 months, E40. Car runs great. Today I filled the tank to E52, fresh 5w30 engine oil change and did some logs just to see how LPFP handle.
And I noticed some knocks event happened, especially when low rpm/ "shifting into next gear". Usually knocks come with heavy timing pull, but mine looks ok. I don't have similar issue with MMv1.0 v1.1, as for as I know v1.2 has more conservative strategy than older versions.
Kinda lost my direction and hope someone could help me digging.

Here are the logs:
https://www.bootmod3.net/log?id=64e6...0b43678633ba05
https://www.bootmod3.net/log?id=64e6...0b43678633ba24

I used antilag 2nd gear on this one:
https://www.bootmod3.net/log?id=64e6...90c6b3c3d98aed

Last one looks healthy, Didn't shift into 4th gear at the end:
https://www.bootmod3.net/log?id=64e6...729bf8e124e6b4


6MT, Stock Turbo,
Dorch stg2 hpfp, Turbosmart BOV, Flexfuel kit, Other parts nothing special.

Bootmod3 Multimap v1.2 stage2+ E30map, Burble strength max12, duration 0.5s(I know, I know...)
Appreciate 0
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