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02-11-2009, 07:36 PM | #23 |
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I find that it is not calibrated to work well with r-compound tires at the track where the forces it is measuring are much higher. It did work well with street tires on stock wheels though.
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02-13-2009, 03:16 AM | #24 |
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I'd bet this is not correct. I have not had the chance to actually test this myself but I would bet it is caught. The car has lateral acceleraion, yaw and steering angle sensors. Picking up this condition would be straight forward.
No, your terms and understanding are both wrong. Having the DSC setting of M Dynamic Mode (MDM) in the US requires the so called "M Drive" option. |
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02-13-2009, 08:16 AM | #25 | |
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02-13-2009, 08:22 AM | #26 | |
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Not sure how your driving was, but traction/stability control will kick in when driving hard at the track. It's not just about being smooth, but about the limits the system has for lateral acceleration, etc. in the various modes - DSC ON, MDM, and DSC OFF. The threshold is quite low with DSC ON for stability control. Same for traction control - though I wouldn't mind having them as separate functions. I may want to turn off stability control and leave traction control on. |
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02-13-2009, 09:08 AM | #27 | |
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Most street tires require higher slip angles to generate maximum cornering than good R-comps do. I suspect that cornering at the limits of street tires, might cause DSC intervention sooner than might happen with purpose built tires. |
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02-13-2009, 09:45 AM | #28 |
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Without turning off DSC there is no way to steer with throttle. MDM allows you to "drive" the car for real without deactivating DSC completely. I use it alot (75-80%). I nearly never drive with DSC completely deactivated. The only times I would ever drive without MDM or full-DSC would be when using LC or on a skid pad. Maybe MDM is too intrusive for some people but if you aren't some kind of professional driver I think it can be useful.
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02-13-2009, 04:47 PM | #29 |
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Is the only way to order MDM, to get the tech pck? I would like to be able to order MDM without EDC as I plan on replacing the suspension. If you must order the tech pck to get MDM, then that would mean you must have EDC with MDM. That would be unfortunate if true.
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02-13-2009, 05:02 PM | #30 |
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It completely depends on your driving experience. Anywhere above intermediate track driving experience level, you'll hate it and won't need it. Up to that point, it's wonderful.
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02-13-2009, 07:39 PM | #31 |
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I find MDM too intrusive when driving on normal dry surfaces. Unfortunately, it lets you get away with some really bad inputs and adds an artificial feel to the experience. It's a much different car, as you'd expect with 400+ hp and neutral handling, with DSC off. In this mode the car does what you make it do and is very catchable at the limit.
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02-13-2009, 08:17 PM | #32 |
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For street driving I love MDM and DSC. I owned and raced a lot of high performance cars with tight limited slips, wide tires and high torque. When the tires get slightly worn and you're driving on new, light rain after a dry period, these cars will snap at you so fast it'll make your head spin. One of my friends was nationally ranked in the Formula Ford spun his Mustang driving straight on I-635 in Dallas in the rain.
The weekend after I put my Auburn limited slip in my 5.0, the car snapped sideways 45-degrees while I was driving straight and accelerating slightly in fifth gear, despite having almost half the tread left. I know of two teen girls killed in a classic 'vette driving straight at relatively low speed on a country road in Jacksonville, FL, in the rain. They weren't speeding, but just didn't know how to handle the car. You may think that you can handle it, but when a car goes from tracking straight to snapping sideways at 60 mph in traffic it's a BIG handful. The tighter the limited slip the faster the snap and bigger handful of trouble you'll have. BMW is able to give us more performance and tighter limited slip by building in these safety features. I recommend using them all of the time on the street. On track days, there'll be times you may want it off and other times that you may want MDM on, but that's a totally different situation. Dave
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02-13-2009, 08:30 PM | #33 | |
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02-13-2009, 09:00 PM | #34 |
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How the hell do you forget when its on/off? lol There's a symbol on the dash that displays it...
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02-13-2009, 11:15 PM | #35 | |
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02-14-2009, 11:25 PM | #36 |
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MDM is like cheating. It's uttery amazing. Being able to slide the car in complete control is awesome. You are cheating yourself out of a lot of fun if you do not opt for it. It's one of the best things about the car.
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02-15-2009, 04:18 AM | #37 | |
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02-15-2009, 04:32 AM | #38 | |
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02-15-2009, 04:47 AM | #39 | |
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But only when traffic allows it off course.And never with the wife and kids....ok sometimes with my wife, she loves rollercoaster rides |
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02-15-2009, 11:10 AM | #41 | |
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(unless you are in the finance/banking industry) |
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02-15-2009, 07:22 PM | #42 | |
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I confirmed that you must get the tech package to get MDM. Seems you can separate them in Europe but not in the US. (I think, my German is a little rusty, I checked the BMW GMBH website for this info.) This bundling does upset me, I didn't really want the iDrive, nav... but after all of the feedback here I wanted it in the car. It's noteworthy that although some say they don't use it, no one said that the M Dynamic Mode did not work as intended. Perhaps someone really clever can figure out how to get MDM to work with aftermarket firmware without the tech package. It's unlikely that it requires any more hardware as all of the sensors and actuators are already there for the stock DSC. I was not willing to take that chance, so in the end I ordered the tech package. Hopefully, I'll grow to like iDrive. As for the electronic damper control, I suspect that this is a worthwhile feature. If my understanding is correct, it is not just changing the valving staticly but changes the damping millisecond by millisecond. You might want to integrate it into your suspension upgrade if you can. Thanks for everyone's feedback, it was very helpful. It was the first thread I started on M3post and I feel welcomed. |
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02-15-2009, 10:36 PM | #43 |
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I've got an '09 coupe with the new iDrive and find it very intuitive. There are now what I call "jump buttons" that take you straight to Nav or CD or Radio or Menu so your iDrive pushes and turns are greatly reduced. You can also preset the buttons under the radio to just about anything.
Dave
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02-15-2009, 10:42 PM | #44 | |
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