08-03-2020, 04:34 AM | #1 |
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M2 CS - geometry - anyone know what's changed ?
I've read a few m2CS reviews and some refer to different geometry setup for M2CS.
Does anyone know any more about this yet ? If so, what's changed from M2Comp geo ? Or is this more oem mis-info ie M2 -> M2Comp - rose-jointed rear M2Comp -> M2CS - better geo ???
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08-03-2020, 07:38 AM | #2 |
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I thought I read that there might be a change in camber? The programming for the e-diff and mdm is different. Improved cooling was also mentioned, but I'm not sure what was done it added to improve cooling.
All of the programming will likely be available to C owners at some point. |
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08-03-2020, 07:52 AM | #3 | |
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Maybe camber correction hubs are installed as standard alas F80/2 CS run standard hubs as per reg & comp m3/4..... Newtis link below confirms m4cs alignment specs are the same as regular m4 https://www.newtis.info/tisv2/a/en/f...g-measurement/
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08-03-2020, 06:42 PM | #4 |
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Geometry is just a fancy word for a slightly altered alignment, unless suspension arms are different in size, which I don't believe is the case. Any shop with half a brain should be able to match those specs for $100-200. Possibly with the stock hats too. However, the CS comes with stickier tires to take advantage of the more aggressive alignment. Not something you would ever feel or benefit from, unless you're at the track and you're a pro.
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08-04-2020, 04:49 AM | #5 |
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763M wheels with Michelin Pilot Sport Cup 2 tires and M-CCB: an improvement for dry road handling over 788M wheels with Michelin Pilot Super Sport tires and the heavier steel M Sport Brakes (2NH) (improved unsprung / rotational weight).
I doubt any changes of other road handling hardware (apart from Adaptive M Suspension). Maybe some tweaking of existing hardware settings.
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08-04-2020, 05:14 AM | #6 | |
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08-04-2020, 07:07 AM | #7 |
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There's an extra 0.4° negative camber up front and various software calibration changes in various systems for the new tyres and dampers.
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08-04-2020, 07:09 AM | #8 |
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Good info - is there any details out in public domain ? If so please share any links...
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08-04-2020, 10:03 AM | #9 | |
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The also camber specs in the standard models also vary, with or without AS.. So it's not necessarily a performance enhancement but a specification based on the use of suspension. . |
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08-04-2020, 10:17 AM | #10 | |
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08-04-2020, 11:28 AM | #11 | |
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08-04-2020, 09:21 PM | #13 | ||
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08-04-2020, 10:56 PM | #14 |
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08-14-2020, 05:45 PM | #15 |
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extract german car magazine road test on m2CS
front toe in 0'06" camber 1'48" - respective ranges 0'02" to 0'18" & -1'14 to -1'44" rear toe in 0'16" camber 1'24" - respective ranges 0'10" to 0'22" & -1'35 to -2'05" Std M2/M2C alignment ranges:- front (nominal) toe in 0'05" & camber -1'29" - respective ranges -0'01" to 0'11" & range -0'59 to -1'59" rear (nominal) toe in 0'08" & camber -1'50" - respective ranges 0'02" to 0'14" & range -1'30 to -2'10"
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08-14-2020, 06:54 PM | #16 |
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So in decimal degrees that's
0.10 toe, 1.80 camber in the front 0.27 toe, 1.40 camber in the back That's not far from what I'm running on the OG (0.05, 1.8 and 0.10, 1.6) |
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08-15-2020, 04:22 AM | #17 | |
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front 0.05 toe-in and -2.25 camber rear 0.1 toe-in and -1.5 camber
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09-17-2020, 08:08 AM | #18 |
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Bumping this for the Camber discussion. In a recent post that referenced a pilot sport cup 2 document for Porsche from 2018 it mentioned the minimum camber for the cup 2 was -1.5 degrees and no more than -4 degrees iirc.
My guess is that this range is highly dependent upon the overall suspension geometry? If not, then it would seem that the CS would need more camber to get into the middle of optimum range if running Cup 2s and the spec range was still valid for this model tire. |
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09-17-2020, 12:36 PM | #19 |
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Great info. It's good to know that BMW finally figured out what kind of alignment settings help these cars rotate.
The 1M came from the factory with -1.1° camber in the front and -1.6 in the rear, and understeered horribly at the limit. It's nice to see a little bit more negative camber upfront compared to the rear. I currently run -2.5 front and -1.8 rear on my track prepped 1M with square wheel/tire setup.
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09-18-2020, 01:07 AM | #20 | |
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https://marketing.michelin.co.uk/p/P...etin_PSC2R.pdf"Wheel Camber can be adjusted to distribute load evenly across the tyre for track use. Michelin Pilot Sport Cup 2 R tyres work well between -1.5 degrees and -3 degrees, but should never be run with more than than -4 degrees of camber." Probably a reasonable go-by for reg MPSC2 tyres as well perhaps ?
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09-18-2020, 01:55 AM | #21 | |
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Of course many things at play, driving style, type of track, track conditions... On this particular day it was 95F ambient and hard to keep tire pressures and temps in check. |
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09-18-2020, 05:28 AM | #22 | |
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