[NYG]

What do you prefer on the track? I'm sure 2WD is more fun but have you folks tried both with their respective racing lines and compared lap times? I'm going to assume 4WD will still lap faster but I've got no experience here yet so I'd love to hear from you.

[boredM]

overwhelmingly 4wd

circle, road, or drag

[Kstadt911]

What tires have people used on M5C for road course? For sizing do R888R 285-35-20 all around on stock wheels work?

Thanks for any info

[devondragon]

I haven't tracked it yet, but will probably do 4WD Sport. I ran my M6 on the track and while the loose rear end was fun, it was pretty easy to swing it too wide and lose a lot of time (with a giant smile).

I was unlucky and got the Pirellis instead of the Michelins, so my plan is to drive them hard and burn them up and then go with slightly wider Michelin 4S probably. (although I really would love to 305 or bigger in the rear which then pushes new rims, and still leaves me with issues finding good upsizing that keeps the rolling diameters < 1.4% (or whatever) of stock...

I think the R888Rs would be great, but I don't know why you wouldn't go 285 F and 295R? It's meant to be a rear biased car (and 4WD Sport delivers) so wider in the back I think would let you put down more power faster coming out of turns, etc....

[SpeedyDad]

I used 4WD Sport. The extreme weight of the M5 on the track chews through tires as it is. In 2WD I would likely go through a set of tires in a day.

[tastes jigga]

At Thermal (BMW Performance Center West) they recommended 4WD with DSC fully on for the non-comp F90. Whereas for the M3/M4 the recommendation was MDM.

The non-comp F90's recommended driving settings were sport plus for both engine and suspension, and comfort for steering. For the M3/M4 it was sport for engine, sport plus for suspension, and comfort for steering.

[NYG]

Love you guys, thanks.

[devondragon]

Originally Posted by tastes jigga

At Thermal (BMW Performance Center West) they recommended 4WD with DSC fully on for the non-comp F90. Whereas for the M3/M4 the recommendation was MDM.

The non-comp F90's recommended driving settings were sport plus for both engine and suspension, and comfort for steering. For the M3/M4 it was sport for engine, sport plus for suspension, and comfort for steering.

I wonder if that's due to lots of newbies? At least on my M6 DSC jumped in and pulled power way too aggressively. MDM was better by far, and off entirely was even faster once I got comfy with that car on that track, etc... Also I can't stand comfort steering, always have it in Sport+ and never felt it was too heavy..

[NYG]

Originally Posted by devondragon

I wonder if that's due to lots of newbies? At least on my M6 DSC jumped in and pulled power way too aggressively. MDM was better by far, and off entirely was even faster once I got comfy with that car on that track, etc... Also I can't stand comfort steering, always have it in Sport+ and never felt it was too heavy..

Comfort steering is typically the preferred/recommended setting for racing/track work on any BMW. If you turn DSC completely off it will default to comfort steering.

[devondragon]

Originally Posted by NYG

Comfort steering is typically the preferred/recommended setting for racing/track work on any BMW. If you turn DSC completely off it will default to comfort steering.

Really? I knew DSC off would kick the throttle map to comfort (or something like it) for smoother control, but I've never seen anything about it moving steering to comfort.. I haven't tracked the F90 yet, but when I tracked the F13 I never noticed a difference in steering when I moved from DSC on, to MDM, to DSC off... At least I don't remember any difference..

Is there a source manual or TSB or something about DSC off = comfort steering?

[evanescent03]

Glad to see some that some folks are tracking this car. I took my M6GC around buttonwillow... it was fairly quick but I felt very isolated in it compared to most other cars I've tracked (F80 M3s, 718S, Camaros, e46 M3...) ... I think the overall size is what kinda killed it for me.

I think if I get an M5C I'll definitely try it in both modes ... haven't driven a far AWD car in a while and I'm sure it's pretty impressive digging out of a corner.

[evanescent03]

Originally Posted by Kstadt911

What tires have people used on M5C for road course? For sizing do R888R 285-35-20 all around on stock wheels work?

Thanks for any info

Were u wanting a square setup just for tire longevity and rotating them front to back or for handling purposes?

[Kstadt911]

Originally Posted by evanescent03

Were u wanting a square setup just for tire longevity and rotating them front to back or for handling purposes?

Not for longevity, not for rotating ... For track purposes, the better R compound track tire sizes are limited so need to switch slightly from stock. So trying to find best option while utilizing stock wheels. Need to take into consideration different size stock Front and Rear wheel width and keep overall diameter very close ...

[Bönz]

Originally Posted by devondragon

I was unlucky and got the Pirellis instead of the Michelins, so my plan is to drive them hard and burn them up and then go with slightly wider Michelin 4S probably. (although I really would love to 305 or bigger in the rear which then pushes new rims, and still leaves me with issues finding good upsizing that keeps the rolling diameters < 1.4% (or whatever) of stock...

Good plan. My sentiments exactly, except I was lucky and got the Michelins. I really dislike the Pirellis based on my F10 experience. You'll love the 4S's even just on the road.

Be careful about sizing guys. Need to maintain overall diameter within 2% front to rear due to AWD. (might even be 1%, I'm not exactly sure)

[devondragon]

I'm going to try to burn through my Pirellis and then find some size setup I like of the 4Ss... I really want 305 or wider on the rear but that seems to be tricky with maintaining F/R diameters.

I tracked my old F13 M6 (not the GC though). While certainly bigger and heavier than my E92 M3, I found it to be surprisingly fun on the track, better in the corners than I expected, and powerful enough to chase down pretty much anyone on the straights. Just had to setup nice early apex turns and try to not let the rear get too loose..

[limeypride]

Originally Posted by Bönz

Good plan. My sentiments exactly, except I was lucky and got the Michelins. I really dislike the Pirellis based on my F10 experience. You'll love the 4S's even just on the road.

Be careful about sizing guys. Need to maintain overall diameter within 2% front to rear due to AWD. (might even be 1%, I'm not exactly sure)

My approach was to come as close as possible to preserving the stock tire delta front:rear, i.e. it's a 3.5mm tirewall delta I think with stock Comp 20"s so I went with Michelin Pilot Supersports 295/30/20 rear and 285/30/20 front yielding a 3mm tirewall delta. I've been running this setup for some time now and have had no issues or drivetrain faults.

[NYG]

Originally Posted by devondragon

Really? I knew DSC off would kick the throttle map to comfort (or something like it) for smoother control, but I've never seen anything about it moving steering to comfort.. I haven't tracked the F90 yet, but when I tracked the F13 I never noticed a difference in steering when I moved from DSC on, to MDM, to DSC off... At least I don't remember any difference..

Is there a source manual or TSB or something about DSC off = comfort steering?

I'm actually not sure where to get an official statement but I know that all of my BMWs default to comfort steering when DSC goes off completely. I don't mean the Sport + setting where the DSC is partially off but when you hold the button for 10 seconds and turn it off completely.

[Phatcat]

Originally Posted by NYG

Comfort steering is typically the preferred/recommended setting for racing/track work on any BMW. If you turn DSC completely off it will default to comfort steering.

Yeah, same in BMW school Korea, all instructor recommended comfort steering, not just for students but that's the steering setting they use as well.

[devondragon]

Originally Posted by NYG

I'm actually not sure where to get an official statement but I know that all of my BMWs default to comfort steering when DSC goes off completely. I don't mean the Sport + setting where the DSC is partially off but when you hold the button for 10 seconds and turn it off completely.

Does the display change when that happens? When I turn off DSC my steering mode still displays Sport+ and I haven’t noticed any change in feel. When I change it to Comfort I notice the change in feel. Could be in my head, but now I’m very curious!

From googling I’m not able to get a clear picture. I saw one post where the rationale for putting steering in Comfort for the track was to keep the PS from overheating (which makes little sense to me). And there’s tons of (often conflicting) info for other M-cars, but that don’t have the same set of settings that our cars have.

On the street I feel like Comfort steering is way too light for me I can’t imagine tracking it like that. I guess I need to spend some time on the track and try everything

[devondragon]

This thread makes it seem like Comfort steering is only due to high temperatures in CA - https://f80.bimmerpost.com/forums/sh....php?t=1383918

And even then there’s folks pointing out that based on the manual that doesn’t actually make any sense. *shrug*.

I can understand if you prefer a lighter feel, but again, for me, Comfort feels too light even for daily driving.

[NYG]

Originally Posted by devondragon

This thread makes it seem like Comfort steering is only due to high temperatures in CA - https://f80.bimmerpost.com/forums/sh....php?t=1383918

And even then there’s folks pointing out that based on the manual that doesn’t actually make any sense. *shrug*.

I can understand if you prefer a lighter feel, but again, for me, Comfort feels too light even for daily driving.

I'm with you brother.

I prefer sport steering.

[limeypride]

Originally Posted by NYG

I'm with you brother.

I prefer sport steering.

I often find myself in the minority but, in this case, I also prefer the Comfort setting. It's all just artificial weight... and I can feel that every time I turn the wheel. There's no additional feedback... because there's no mechanical feedback to speak of to begin with.

I get the fact that at high speed, the resistance can prevent unintended input but I haven't found that to be a problem in Comfort mode.