01-17-2017, 02:00 PM | #1 |
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Square set up and MDM intervention
I would like to track my M2 in sport plus (MDM mode) without turning DSC off.
For those who tracked the M2 with a square set up, have you tried running in MDM mode on track? Is MDM intervening more and cutting power because the square set up has the same diameter tires front and back? I am saying this because the M2 rear tires diameter are approximately 2.5% larger than the front. Based on the information on the F82 forum running the same diameter all around will increase MDM/DSC intervention (as it thinks the rear slips). I did research the F82 forum and found the following thread that contains valuable information. http://f80.bimmerpost.com/forums/sho...ight=staggered In summary, if you tracked your M2 with a square set up in MDM mode, please share your experience, are the nannies always intervening? Thanks |
01-18-2017, 11:43 AM | #2 |
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My 2 cents if you're not comfortable tracking the car with DSC off you probably don't need to spend your money on wheels and tires but more driving time Don't mean that in any offensive way.
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01-18-2017, 01:22 PM | #3 |
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No offense taken.
My intention is to run in MDM mode for the first year with the car and then decide DSC off or not. I would ideally like to run a square set up so I can rotate. Based on previous experience, running the MPSS on track is not an option (Sidewall too soft for the BMW suspension causing premature front tire wear after few events) so will need to spend money on tires at least... Last edited by Hossel19; 01-18-2017 at 01:36 PM.. |
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01-18-2017, 03:54 PM | #4 |
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If you set up the suspension with camber plates , don't over drive the car, and have the correct starting tire pressures, the MPSS tires will be fine.
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01-20-2017, 11:32 AM | #6 | |
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Even with proper tire pressure my experience with Yoko AD08 and Dunlop StarSpec is significantly better than MPSS on the track from a durability perspective. |
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01-20-2017, 01:11 PM | #7 |
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01-20-2017, 03:36 PM | #8 |
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New Info - Seems DSC is adaptive and should not intervene more with a square set up!
I keep digging to find an answer to my question in the original post and I found the information below posted on the F82 forum.
Seems like DSC is meant to be adaptive and should not intervene more on the track with a square set up vs staggered... Anyone has experienced this? Extract from the F82 forum: I recently switched my car to a square setup. However, before I did this, I had the opportunity to have a few beers after dinner with the BMW engineer who was in charge of DSC programming and development for the F8X platform. (This was while I was at the Ring for the annual BMW "invitational"). Anyway, I had heard thisrumor and took the opportunity as to ask "Philip" if there was any DSC issues with running non-standard tire sizes or a square setup. He absolutely assured me that DSC will automatically learn and adapt to whatever tire sizes you are running. Additionally, He said it can take up to 70km of accumulated straight driving in order for DSC to fully complete the adjustment. Based on the info he provided, I decided to go to a square setup to help balance tire wear. Source: http://f80.bimmerpost.com/forums/sho...p#post20361139 |
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01-20-2017, 05:58 PM | #9 | |
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01-21-2017, 06:13 PM | #10 |
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I can confirm no TPMS on my M2. My understanding is Canadian models use the ABS sensor in some way to detect tire pressure issues. Not sure how exactly it works however... Had the same thing on my 335 and tire pressure never caused an issue.
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01-21-2017, 11:56 PM | #12 | |
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As an aside, I have driven the new C7 corvette and it is crap on track unless it is in full race mode. |
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01-22-2017, 12:07 PM | #13 | |
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01-22-2017, 04:04 PM | #14 | |
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So Euro MDM is very permissive and should not intervene in my case as long as I keep running a staggered set up. This is a positive sign. I will look into how to get Euro MDM. Now I need to figure out if I can have the same thing while running a square set up. I am going with track pads / wheels+tires. want to avoid camber plates. |
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01-22-2017, 04:08 PM | #15 | |
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If this is the case I wonder if running a square set up on the M2 with 265-35-18 will cause TPMS issues since the diameter is roughly 2.5% less then OEM. In case it does, I assume resetting the TMPS after installing the square set up should fix this. |
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01-22-2017, 05:34 PM | #16 | ||
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01-22-2017, 10:44 PM | #17 | |
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01-23-2017, 01:44 AM | #18 |
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I have a square set up with 18x9.5 wheels and 265 tires. As soon as I tracked the car I noticed intervention on turn exit on power. Car notices and traction light comes on and when you go to get on power it intervenes and cuts out. Feels like fuel starvation. After the first session turned all modes off. If you feel comfortable I would recommend
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01-23-2017, 07:47 AM | #19 | |
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Two quick questions: 1) Did you track your first session in sport plus (MDM) when you felt it intervening? 2) Did you get the chance to drive a consecutive 70km (45 miles) with the square set up before trying it on track (based on the information in post #8 above) |
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01-23-2017, 07:52 AM | #20 | |
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01-23-2017, 08:55 AM | #21 |
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So quick check on the whole MDM thing. When I read the US manual and mode tables, selecting MDM (aka "traction" mode) allows wheel slip, but also sets steering and throttle mapping to comfort settings
Am I reading it wrong/missing something? I'm a DSC-off guy at the track, but these are not combinations I imagine would be desirable very often...like only in the snow. If there's a way to get MDM and still keep sport plus steering and throttle, I'd like to hear about it. Thoughts? Last edited by rjn; 01-23-2017 at 09:02 AM.. |
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01-30-2017, 08:01 PM | #22 | ||
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Yoko AD08 and Dunlop StarSpec is significantly better than MPSS on the track from a durability perspective." Agree 100 percent. The AD08 is significantly better than the MPSS with regard to hot weather track use. At temps Above 80 degrees the MPSS can chunk badly where as the AD08 will be in its element. |
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