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      10-22-2019, 02:46 AM   #1
SkyDubBlue
M2_SkyBlue
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Germany
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Drives: 2019 M2 Competition
Join Date: Jul 2018
Location: Where the Wild Things Are

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"Money shift" on my 6MT M2 Competition - Car engine got replaced

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Here’s my money shift for your viewing pleasure

4th to 3rd.
Spun just under 9500rpm.
Piston heads trashed, valves bent, but rods were straight. Crankshaft was irreparable as well. Connection from shaft to crankhub bolt was also destroyed. I had Vargas Turbos crankhub bolt lock on at the time.

Was not stock. Stage 2, Catless Downpipes, EVenturi intake, BMS JB4 as boost controller, Bootmod3 stage 2 aggressive ots.

Car is back on the road as of August ‘19 and more mods are on now.

Feel free to share for science



EDIT by moderator Artemis
  • Story: German (original): here | English raw translation (Google): here
  • Additional video (engine replacement at the owner's expense): here.
On the original F87 M2, M2 LCI and M2 Competition featuring manual transmission, rev-match (auto blip) somehow 'warns' on downshift about over-rev before clutch release in all driving modes, except for DSC OFF mode. The cringing over-rev wail allows you just the moment of realization to refrain from releasing the clutch - you correct the gear shift without damage. However, in DSC OFF mode the driver shifts into a gearbox death trap: no warning 'over-rev wail' prior to releasing the clutch. The driver releases the clutch, followed by 'The Expensive Sound':
  • When you shift into a higher gear, rev-match will not be activated. So you will not hear anything particular. And that's OK, because no over-rev antics.
  • It's only when you shift into lower gear that rev-match will be triggered before you release the clutch (except when driving in DSC OFF mode): as soon as you enter/access the lower gear slot, rev-match is triggered. If you miss-shift, the cringing high-pitched wailing noise of revs unhealthily operating out of scope (impossible for rev-match to 'match' revs under that situation) will immediately catch your attention: almost as a natural 'uh-oh' reflex, you will immediately pull the gear stick out of that (wrong) lower gear slot into neutral whilst keeping the clutch pedal pushed.
Many people wonder why rev-match is hard-coded in all driving modes (except for DSC OFF mode) on the F87 M2 (no "sport"/"auto blip" on/off toggle as on the Cayman GT4). IMHO 'money shift' protection is one of the main reasons (or at least a fringe benefit).
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