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      03-25-2019, 02:12 PM   #1
Antartic
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Used MDM for the first time

So I've driven my F80 for about 14k miles with all the safety nannies on. I've driven it in sport modes about 30-40% of the time.

Today afternoon I decided to check out this MDM mode. Holy hell- it's like a completely different car! The acceleration is so much more responsive! Makes me fall in love with the F80 all over again.

Of course, I know my limits as a driver, so I promptly got out of MDM and put DSC back on. But getting a taste of what it can truly do unchained put a smile on my face!
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      03-25-2019, 02:33 PM   #2
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One more level to go....
Full nannies on
MDM
TC Completely off (not recommended) try it out for $hits and giggles in dry weather.
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      03-25-2019, 02:39 PM   #3
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I've had mine just a few weeks. Need some dry pavement and then I'll give this ago. When I row the gears I can feel something that feels like a micro flattening of the torque curve. I'm guessing that's the TC cutting in.
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      03-25-2019, 03:06 PM   #4
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Quote:
Originally Posted by Yessir View Post
One more level to go....
Full nannies on
MDM
TC Completely off (not recommended) try it out for $hits and giggles in dry weather.
Agreed! Need to find a pretty nice open area to try it out.
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      03-25-2019, 03:07 PM   #5
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Quote:
Originally Posted by Mendoteach View Post
I've had mine just a few weeks. Need some dry pavement and then I'll give this ago. When I row the gears I can feel something that feels like a micro flattening of the torque curve. I'm guessing that's the TC cutting in.
You definitely need a dry pavement- and a clear enough area... I suggest an empty parking lot.

What you are feeling is definitely the TC reining in the car.
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      03-25-2019, 03:32 PM   #6
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Quote:
Originally Posted by Antartic View Post
You definitely need a dry pavement- and a clear enough area... I suggest an empty parking lot.

What you are feeling is definitely the TC reining in the car.
DSC (TC) doesn't rein in the car, it reins in the driver. If you're driving in a manner that will cause the car to loose traction (and you to lose control), DSC will intervene to help prevent you from proving that you are an idiot and a poor driver.

If you don't understand this, then you will never be able to effectively control the car yourself with DSC off.

If you really want to learn how to control your M3, sign up for an autocross. Run the first session with DSC on, the second session in MDM mode, and the third session with DSC off. You will be humbled.
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      03-25-2019, 03:35 PM   #7
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I drive mdm all the time. Totally agreed.

It was scary when I first enabled it at the track
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      03-25-2019, 03:50 PM   #8
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swore title said MDMA
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      03-25-2019, 04:52 PM   #9
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swore title said MDMA
I'm sure he would have been just as giggity goo , if the title did say that. Haha
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      03-25-2019, 04:54 PM   #10
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Quote:
Originally Posted by SD ///M4 View Post
DSC (TC) doesn't rein in the car, it reins in the driver. If you're driving in a manner that will cause the car to loose traction (and you to lose control), DSC will intervene to help prevent you from proving that you are an idiot and a poor driver.

If you don't understand this, then you will never be able to effectively control the car yourself with DSC off.

If you really want to learn how to control your M3, sign up for an autocross. Run the first session with DSC on, the second session in MDM mode, and the third session with DSC off. You will be humbled.
I understand it- I wasn't able to explain it properly in my earlier post. I do realize that DSC will not be above the law of physics.

I just wanted to share how I felt after driving in MDM mode the first time, didn't mean to spread any misinformation.
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      03-25-2019, 05:45 PM   #11
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Quote:
Originally Posted by Antartic View Post
But getting a taste of what it can truly do unchained put a smile on my face!
Even in MDM, the car is quite bridled. So no, it is far from being "unchained" in MDM . You need DSC fully off for that, but do so at your own risk (not recommended unless you have the proper driving skills).
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      03-25-2019, 06:49 PM   #12
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We are talking ‘bout Euro MDM, right? Because big difference with ‘USA’ MDM.
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      03-25-2019, 10:22 PM   #13
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In a straight line, with the DSC fully off, at what speed will it break the tires lose?

I've never had a car with this much power. I'm really liking it. I've ridden, own and owned fast motorcycles, but this is the best acceleration I've owned with a cage around me. Had a couple turbo charged 350hp Mitsus and a V8 S4 (all AWD), but this is whole different beast. Need to do a track day.
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      03-25-2019, 10:57 PM   #14
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Quote:
Originally Posted by CanAutM3 View Post
Even in MDM, the car is quite bridled. So no, it is far from being "unchained" in MDM . You need DSC fully off for that, but do so at your own risk (not recommended unless you have the proper driving skills).
I agree. i've had my car less than 1000 miles and I can already feel MDM is too instrusive. But with DC off the rear end breaks away a bit too suddenly for my liking.

I've heard the euro mdm is perfect for that middle ground.
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      03-25-2019, 11:07 PM   #15
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Quote:
Originally Posted by SD ///M4 View Post
DSC (TC) doesn't rein in the car, it reins in the driver. If you're driving in a manner that will cause the car to loose traction (and you to lose control), DSC will intervene to help prevent you from proving that you are an idiot and a poor driver.

If you don't understand this, then you will never be able to effectively control the car yourself with DSC off.

If you really want to learn how to control your M3, sign up for an autocross. Run the first session with DSC on, the second session in MDM mode, and the third session with DSC off. You will be humbled.
While it might be a relative perspective, semantics thing, but I disagree with your above post. The DSC most certainly reins the car in, because, well, the driver didn't, can't or couldn't. The car steps in (the reining) because the driver stepped on the pedal making a torque request (in conjunction with other factors), that was greater than the tires coefficient of friction permitted at that moment. So in essence the car, says, "Oh no, you're not getting all that." Since the driver doesn't have the skill and/or the impulse control to rein themselves in, cars and motorcycles have nannies that do the reining now.

Love your suggestion about autocross and ramping it up each session.
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      03-25-2019, 11:14 PM   #16
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MDM allows enough slip to make you smile, but not so much that you become a light pole ornament.
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      03-26-2019, 01:59 AM   #17
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You want to know what chaos feels like? DSC off in the rain.
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      03-26-2019, 02:41 AM   #18
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I did a couple Autocross laps on wet pavement after a guy spilled oil on the course. With TC completely off, it was practically un-driveable. Wheel spin city. With MDM, I really felt it intervene to stop the wheel spin. It was pretty impressive. The only time I "liked" my MDM mode.
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      03-26-2019, 10:11 AM   #19
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Quote:
Originally Posted by jmg View Post
You want to know what chaos feels like? DSC off in the rain.
Hahah during rain, my settings are Efficient/Comfort/Comfort/DSC ON. I know my limits- not trying anything crazy when the road is wet!
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      03-26-2019, 12:15 PM   #20
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US MDM is terrible basically like having it off. Euro/CS MDM is amazing actually let's you slide love it
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      03-26-2019, 01:27 PM   #21
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Quote:
Originally Posted by SD ///M4 View Post
DSC (TC) doesn't rein in the car, it reins in the driver. If you're driving in a manner that will cause the car to loose traction (and you to lose control), DSC will intervene to help prevent you from proving that you are an idiot and a poor driver.

If you don't understand this, then you will never be able to effectively control the car yourself with DSC off.

If you really want to learn how to control your M3, sign up for an autocross. Run the first session with DSC on, the second session in MDM mode, and the third session with DSC off. You will be humbled.
While I agree with the essence of your intended message, I can't say I agree with the post itself though.

DSC does indeed limit the car's abilities by reining the car. It is tuned very conservatively for safety and will make interventions before an actual loss of traction occurs. This is also true in MDM, but to a much lesser extent.
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      03-26-2019, 03:23 PM   #22
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Quote:
Originally Posted by PayamFSU View Post
US MDM is terrible basically like having it off. Euro/CS MDM is amazing actually let's you slide love it
I had a '16 F80 prior to my CS, and I can confirm that the MDM on the CS is a lot more fun and loose. It kind of took me by surprise at first! The rear end kicked out so fast that I thought I had completely switched DSC off! It has a nice progressive recovery though, quite enjoyable and a bit nerve racking for passengers!
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