[messiry]

Originally Posted by Transfer

By the numbers
M3 is 1745 kg (7.63 lbs/hp)
M3 xDrive is 1795 kg (7.85 lbs/hp)
M5 is 1975 kg (7.24 lbs/hp)

That's 180 kg or 396 lbs difference between M5 and AWD M3. Don't make things up.

I am very very excited for the first AWD M3! And now with 2WD mode including adjustable traction control? Are you kidding me?! So amazing. I guess this seals it that M Drive Professional is a must have on the AWD version.

You are comparing the M3 G80 non competition
I don't make anything up you can read it yourself

https://www.bmwblog.com/2020/09/23/b...82-vs-g80-g82/

[hz101]

BMW just made it really hard for me to decide if I should keep my current 2021 M3C order, or wait for the xDrive to come out. The additional 50 kg is not an issue. I need to lose some weight anyway haha.

[mirob]

Originally Posted by KevinGS

Yes, it looks the way, the full 10 levels seem to be available in 2WD mode.

It does make me wonder what the difference is between Level 10 traction control with the DSC off...and the DSC simply remaining on. Once you turn traction control completely off, but leave the it in Level 10, what do you lose (or gain) by simply keeping traction control on? Does DSC Off and Level 10 still allow you to slide/drift a bit, or does it reel you in like you have the DSC On? Well, that would make no sense, there must be a difference.

In the G8X, like in the F9X, you have to turn the DSC off in order to access 2WD. Unlike in the F9X, the G8X's M Drive Professional package with Track Mode allows you to access the 10-step TC, but DSC has to be off in order for this mode to be accessed. F9X don't have that option.

From what I understood from the M Traction Control video, with the traction increasing from left to right, the levels are as follows:

DSC Off -> 1-10 TC -> MDM -> DSC On

[KevinGS]

Originally Posted by mirob

In the G8X, like in the F9X, you have to turn the DSC off in order to access 2WD. Unlike in the F9X, the G8X's M Drive Professional package with Track Mode allows you to access the 10-step TC, but DSC has to be off in order for this mode to be accessed. F9X don't have that option.

From what I understood from the M Traction Control video, with the traction increasing from left to right, the levels are as follows:

DSC Off -> 1-10 TC -> MDM -> DSC On

Ah OK. So DSC Off/Traction Control 10 allows more slip/traction loss than having MDM on (and of course more slip than simply having DSC On?

[mirob]

Originally Posted by KevinGS

Ah OK. So DSC Off/Traction Control 10 allows more slip/traction loss than having MDM on (and of course more slip than simply having DSC On?

That's my understanding.

Here's some info on it (you've probably already seen this). Right at the 4:00 minute mark.

[heavyD^2]

Originally Posted by Lovegreatcars

anyone else find it ironic that a guy with the handle heavyD is somewhat disappointed about added weight?

I'm actually not that heavy. I got that nickname in the early 90's and just went with it when the internet went online. If you search around the internet you will see a heavyD in a lot of automotive forums I've been a member of.

[whatnotsomuchf80]

So they just posted the 0-100kmh is 3.5 sec and 100-200kmh is 8.8 sec... I'm sure third party testing will get lower numbers

[jpsimon]

Originally Posted by whatnotsomuchf80

So they just posted the 0-100kmh is 3.5 sec and 100-200kmh is 8.8 sec... I'm sure third party testing will get lower numbers

Where was that posted?

[jimbethesda]

Originally Posted by KevinGS

Ah OK. So DSC Off/Traction Control 10 allows more slip/traction loss than having MDM on (and of course more slip than simply having DSC On?

Not really. From another post.

[xlover]

Originally Posted by jpsimon

Where was that posted?

It was in the Q+A released today.... we know bmw are conservative with their posted times too....

[KevinGS]

Originally Posted by jimbethesda

Not really. From another post.

Thanks, Jim, that did provide some clarity.

The 10-stage traction control manages rear wheel spin using the engine's RPM as the only parameter (I think this part is interesting that only the engine RPM is managed for the TC system).

And then for the DSC, it controls the yaw rate (which measures a vehicle's angular velocity about its vertical axis in degrees or radians per second in order to determine the orientation of the vehicle as it hard-corners or threatens to roll-over) by managing the engine power and brakes to stabilize the car.

Very intriguing, and can't wait to play around with all of this at the track.

[supralex]

So let me recap, the guy got smoked by a subaru sti in the alps and this is why we will not get anymore RWD BMWs ?

[solstice]

Originally Posted by xlover

It was in the Q+A released today.... we know bmw are conservative with their posted times too....

Yeah, 0.3s faster than the RWD is more valuable than the actual time they give. Didn’t carwow clock 3.6 with the RWD? That would indicate possible 3.3s with not much effort.

Edit, I see the answer is for 0-100km/h so the AWD is 0.4s faster than BMW’s 3.9s 0-100 number for the RWD. So 3.2s should be doable. That’s moving and will make the 1/4 mile equally impressive.

[whatnotsomuchf80]

Originally Posted by jpsimon

Where was that posted?

From their Instagram story on @bmwm. Also I can't find exact numbers but I'm seeing F80 stock 100-200kmh were 9.8 or 9.3 seconds. If so, 8.8 is a massive improvement especially for a heavier AWD car off a roll. Tuned AWD G8X's will be unreal.

[MJO316]

Originally Posted by whatnotsomuchf80

From their Instagram story on @bmwm. Also I can't find exact numbers but I'm seeing F80 stock 100-200kmh were 9.8 or 9.3 seconds. If so, 8.8 is a massive improvement especially for a heavier AWD car off a roll. Tuned AWD G8X's will be unreal.

JB4 is a must as of now. Hoping someone else comes out with another tune. I've asked around and haven't gotten a straight answer.

[bimmer456]

I would use full traction 4WD with sport plus everything else would be nice if you could have full traction control with that. Also would be nice if 2wd mode had the traction control of the s drive models.

[CanAutM3]

Originally Posted by KevinGS

Yes, it looks the way, the full 10 levels seem to be available in 2WD mode.

It does make me wonder what the difference is between Level 10 traction control with the DSC off...and the DSC simply remaining on. Once you turn traction control completely off, but leave the it in Level 10, what do you lose (or gain) by simply keeping traction control on? Does DSC Off and Level 10 still allow you to slide/drift a bit, or does it reel you in like you have the DSC On? Well, that would make no sense, there must be a difference.

My understanding is that DSC and MDM use the brakes individually applied at each wheel in conjunction with engine power output management to control the attitude of the car. In DSC Off with the variable TC in levels 1 to 10, only engine power is used to manage slip. I see the adjustable TC as a form of auto throttle .

[Mako]

Originally Posted by solstice

Yeah, 0.3s faster than the RWD is more valuable than the actual time they give. Didn't carwow clock 3.6 with the RWD? That would indicate possible 3.3s with not much effort.

Edit, I see the answer is for 0-100km/h so the AWD is 0.4s faster than BMW's 3.9s 0-100 number for the RWD. So 3.2s should be doable. That's moving and will make the 1/4 mile equally impressive.

I would be disappointed if it's only 3.3 because the X3MC did 3.3 and is 500 lbs heavier.

This should be closer to 3.0-3.1

[CanAutM3]

Originally Posted by Neptune7

At this point I'm wondering why release a RWD-only M3 Comp at all? Just for the weight savings?

Weight, weight distribution, drivetrain loss and drivetrain inertia. For those that do not need AWD, RWD will offer purer/better performance, particularly on track.

[CanAutM3]

Originally Posted by solstice

Yeah, 0.3s faster than the RWD is more valuable than the actual time they give. Didn’t carwow clock 3.6 with the RWD? That would indicate possible 3.3s with not much effort.

Edit, I see the answer is for 0-100km/h so the AWD is 0.4s faster than BMW’s 3.9s 0-100 number for the RWD. So 3.2s should be doable. That’s moving and will make the 1/4 mile equally impressive.

Originally Posted by Mako

I would be disappointed if it's only 3.3 because the X3MC did 3.3 and is 500 lbs heavier.

This should be closer to 3.0-3.1

I expect to see some AWD G8X to be tested below 3 seconds to 60mph (with a 1ft roll-out). The 3.6~3.7 seconds we've seen thus far use 2nd gear to launch. The AWD will allow full brake torquing in 1st gear to catapult the G8X off the line.

[Ilyam5]

Originally Posted by CanAutM3

Weight, weight distribution, drivetrain loss and drivetrain inertia. For those that do not need AWD, RWD will offer purer/better performance, particularly on track.

Absolutely agree.
I would add to that - reliability on the track.

If you track your car - the complexity and constant work of transfer case will kill it - transfer case will fail

Heavy car will generate a lot of heat on the front brakes, so the drive shaft ball joints ill overheat on front wheels and eventually fail.

I even question the reliability of the auto box for track work. Most of those automatics are life fill with oil. How will it handle heat?
Manual box is much simpler for the track duty and possibility to put good racing Motul fluid in the gearbox and change it is a plus.

[solstice]

Originally Posted by CanAutM3

I expect to see some AWD G8X to be tested below 3 seconds to 60mph (with a 1ft roll-out). The 3.6~3.7 seconds we've seen thus far use 2nd gear to launch. The AWD will allow full brake torquing in 1st gear to catapult the G8X off the line.

Originally Posted by Mako

I would be disappointed if it's only 3.3 because the X3MC did 3.3 and is 500 lbs heavier.

This should be closer to 3.0-3.1

Possibly but keep in mind BMW’s official gap RWD vs AWD of 0.4s include any changes to LC as lower launch gear. 0.4s is a massive gap when you’re talking times in the 3 seconds. If you’re talking 0.7s or more it starts to get very difficult to achieve. We’ll see, on a glued track with optimal temperatur, winds, oxygen saturation and optimal fuel maybe sub 3s, maybe. Anyhow, it will be the first M3 that is properly fast out of the box on the strip.