Traction loss when shifting from second to third

Straight Dave · 01-21-2015, 11:00 AM

Maybe it's just me and I know I didn't see the problem in DCT, but in my 6 speed when I shift from second to third, traction control kicks in and slows me down. Not sure if others are having the same problem but not sure if anyone else had that issue?

YMB-M3-J2 · 01-21-2015, 11:17 AM

DCT does the same thing if you are on the gas hard and in the 2nd or 3rd setting on the transmission. torque!

Richy Rich · 01-21-2015, 01:02 PM

I just drive with TC off. \_("_")_/

JustinCredibleM · 01-21-2015, 01:07 PM

Happens to me with my tune from 3rd to 4th

.

brianeck · 01-21-2015, 01:09 PM

You're gonna get slowed down by either the TC or wheel spin. Try turning off TC and opening your windows under the same acceleration conditions and you'll hear the tires chirp, its totally normal in a car with this much power. . . You're going from no acceleration during the shift itself to WOT very quickly so the back tires want to break free for a second, but the TC isn't letting them. I can't comment on what's faster, letting the tires chirp or leaving TC on because I'm stuck with my winter setup at the moment

I'm sure some of the other guys or Lups can share their experiences.

*Edit - you may not audibly hear the tires chirp since the car is sexy and loud, but you should 100% feel a different dynamic as the wheels slip a little. TC in the standard mode is designed to keep the car pointing forward and minimize tire spin in all circumstances. It is not designed to help you lay as much power down on the road as possible. Mess around with the settings when driving in a straight line and see how the car responds differently!

Wes Howell · 01-21-2015, 01:41 PM

Yeah - it happens. I wish MDM was less intrusive as well. I don't like driving around everywhere with no traction control - but I do. I know how to drive but would like the extra safety margin of MDM.

Also worth mentioning that BMW put tires that are too thin on this car. It would do better in all the reviews and track comparisons if it wasn't stuck with 275's Even some Pcars with less power have 295's.

Straight Dave · 01-21-2015, 01:42 PM

I think my biggest fear is turning TC off in a street setting instead of at the track. Don't want a little spirited driving ending with me sideways into a concrete barrier. Also I've heard with TC off the car gets sideways pretty quickly if you don't watch yourself (and I certainly do not watch myself haha).

CanAutM3 · 01-21-2015, 02:31 PM

Quote:

Originally Posted by brianeck

You're gonna get slowed down by either the TC or wheel spin. Try turning off TC and opening your windows under the same acceleration conditions and you'll hear the tires chirp, its totally normal in a car with this much power. . . You're going from no acceleration during the shift itself to WOT very quickly so the back tires want to break free for a second, but the TC isn't letting them. I can't comment on what's faster, letting the tires chirp or leaving TC on because I'm stuck with my winter setup at the moment

I'm sure some of the other guys or Lups can share their experiences.

*Edit - you may not audibly hear the tires chirp since the car is sexy and loud, but you should 100% feel a different dynamic as the wheels slip a little. TC in the standard mode is designed to keep the car pointing forward and minimize tire spin in all circumstances. It is not designed to help you lay as much power down on the road as possible. Mess around with the settings when driving in a straight line and see how the car responds differently!

I am pretty sure that one would be faster with DSC off, albeit with a little more risk

.

I don't think that there is an actual loss of traction. My mpression is that DSC cuts power during shifts in anticipation of potential loss of traction.

When I was at the track last fall, MDM would cut power significantly during 2nd to 3rd and 3rd to 4th shifts. When I turned DSC off, I did not get much wheel spin at all and the car remained perfectly poised but with the benefit of not losing power during shifts

. My experience is with DCT, but I am pretty sure it is the same with a 6MT

.

brianeck · 01-21-2015, 02:35 PM

Quote:

Originally Posted by CanAutM3

I am pretty sure that on would be faster with DSC off, albeit with a little more risk

.

I don't think that there is an actual loss of traction. My mpression is that DSC cuts power during shifts in anticipation of potential loss of traction.

When I was at the track last fall, MDM would cut power significantly during 2nd to 3rd and 3rd to 4th shifts. When I turned DSC off, I did not get much wheel spin at all and the car remained perfectly poised but with the benefit of not losing power during shifts

. My experience is with DCT, but I am pretty sure it is the same with a 6MT

.

Ha thanks for the insight

I also agree with a few posts up that the MDM seems to be quite intrusive as well, although I can't really give a totally fair assessment because I'm running 255 rear rubber for another 3 months. Accordingly I don't necessarily think its the worse thing in the world that the car's magic brain won't let me push it too hard since its currently geared up in a manner that should provide notably worse traction then OEM in the best of circumstances.

Brady1984 · 01-21-2015, 04:10 PM

Quote:

Originally Posted by Richy Rich

I just drive with TC off. \_("_")_/

Y'all just go right ahead.... http://f80.bimmerpost.com/forums/sho....php?t=1075458

Richy Rich · 01-21-2015, 04:22 PM

Quote:

Originally Posted by Brady1984

Quote:

Originally Posted by Richy Rich

I just drive with TC off. \_("_")_/

Y'all just go right ahead.... http://f80.bimmerpost.com/forums/sho....php?t=1075458

Some of us actually know how to drive.

JNoSol · 01-21-2015, 04:51 PM

Quote:

Originally Posted by Richy Rich

Quote:

Originally Posted by Brady1984

Quote:

Originally Posted by Richy Rich

I just drive with TC off. \_("_")_/

Y'all just go right ahead.... http://f80.bimmerpost.com/forums/sho....php?t=1075458

Some of us actually know how to drive.

That poor guy. At least he's famous now. Hopefully Daniel Tosh will give him a web redemption.

brianeck · 01-22-2015, 11:18 AM

Quote:

Originally Posted by JNoSol

That poor guy. At least he's famous now. Hopefully Daniel Tosh will give him a web redemption.

Haha I think he deserves it!

JoeFromPA · 01-22-2015, 11:50 AM

Quote:

Originally Posted by Wes Howell

Yeah - it happens. I wish MDM was less intrusive as well. I don't like driving around everywhere with no traction control - but I do. I know how to drive but would like the extra safety margin of MDM.

Also worth mentioning that BMW put tires that are too thin on this car. It would do better in all the reviews and track comparisons if it wasn't stuck with 275's Even some Pcars with less power have 295's.

Just to address this for the 57th time...

Wider tires don't, by themselves, increase rear straight line traction.

Porsche isn't putting 295s on the rear of lower powered cars for straight line traction. It's putting them on there for lateral traction with their suspension design. Besides which, Porsche needs LESS rear tire for straight line traction with their rear engined vehicles anyway (due to better weight/pressure on the rear tread).

Wes Howell · 01-22-2015, 01:12 PM

57 times eh? Wow, you're on quite the rampage. Congrats and good luck with that.

Wide tires don't help straight line traction? ok.. Thanks for the enlightenment.
All the dragsters and high HP car owners are going to feel SOOOO stupid....

My car has better traction with 295's than it did with the same rubber on 275's.

whatever....

01-21-2015, 11:00 AM	#1
Straight Dave Lieutenant 27 Rep 444 Posts Drives: 2011.5 e92 m3 Join Date: Jun 2010 Location: Houston iTrader: (0)	Traction loss when shifting from second to third Maybe it's just me and I know I didn't see the problem in DCT, but in my 6 speed when I shift from second to third, traction control kicks in and slows me down. Not sure if others are having the same problem but not sure if anyone else had that issue?
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01-21-2015, 11:17 AM	#2
YMB-M3-J2 Major 258 Rep 1,309 Posts Drives: YMB M3 Join Date: Jan 2010 Location: South Florida iTrader: (0) Garage List 2016 BMW X6M [0.00] 2018 BMW M3 [0.00] 2015 BMW X4 35i [0.00] 2015 BMW M4 (SOLD) [0.00] 2012 BMW 328i SL(SOLD) [0.00] 2008 BMW 328i (SOLD) [0.00] 2007 C230 Komp (SOLD) [0.00] 1999 BMW 328i (SOLD) [0.00]	DCT does the same thing if you are on the gas hard and in the 2nd or 3rd setting on the transmission. torque!
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01-21-2015, 01:02 PM	#3
Richy Rich Colonel 3169 Rep 2,135 Posts Drives: F80 \| MKIV Supra \| Aventador S Join Date: Jan 2014 Location: Los Angeles iTrader: (0)	I just drive with TC off. \_("_")_/ __________________ For Sale: 2017 740whp Frozen White M3 \| 5900 Miles [sold] 'GR3MLIN' - Satin Mineral Grey M3 Build Thread
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01-21-2015, 01:07 PM	#4
JustinCredibleM Second Lieutenant 47 Rep 287 Posts Drives: '15 GT-R, '02 996TT Join Date: Mar 2014 Location: Las Vegas, NV \| San Diego, CA iTrader: (0)	Happens to me with my tune from 3rd to 4th .
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01-21-2015, 01:09 PM	#5
brianeck Part Time Firetruck Crash Barrier 789 Rep 1,563 Posts Drives: 2022 M340ix Mineral Grey Join Date: Mar 2013 Location: Nyack NY iTrader: (0)	You're gonna get slowed down by either the TC or wheel spin. Try turning off TC and opening your windows under the same acceleration conditions and you'll hear the tires chirp, its totally normal in a car with this much power. . . You're going from no acceleration during the shift itself to WOT very quickly so the back tires want to break free for a second, but the TC isn't letting them. I can't comment on what's faster, letting the tires chirp or leaving TC on because I'm stuck with my winter setup at the moment I'm sure some of the other guys or Lups can share their experiences. *Edit - you may not audibly hear the tires chirp since the car is sexy and loud, but you should 100% feel a different dynamic as the wheels slip a little. TC in the standard mode is designed to keep the car pointing forward and minimize tire spin in all circumstances. It is not designed to help you lay as much power down on the road as possible. Mess around with the settings when driving in a straight line and see how the car responds differently! __________________ m340ix Mineral Grey/Tacora Red
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01-21-2015, 01:41 PM	#6
Wes Howell www.facebook.com/weshowellcreative 59 Rep 623 Posts Drives: 2015 AW M4 Coupe Project Car Join Date: Feb 2011 Location: Instagram #weshowell iTrader: (1)	Yeah - it happens. I wish MDM was less intrusive as well. I don't like driving around everywhere with no traction control - but I do. I know how to drive but would like the extra safety margin of MDM. Also worth mentioning that BMW put tires that are too thin on this car. It would do better in all the reviews and track comparisons if it wasn't stuck with 275's Even some Pcars with less power have 295's. Last edited by Wes Howell; 01-21-2015 at 01:58 PM..
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01-21-2015, 01:42 PM	#7
Straight Dave Lieutenant 27 Rep 444 Posts Drives: 2011.5 e92 m3 Join Date: Jun 2010 Location: Houston iTrader: (0)	I think my biggest fear is turning TC off in a street setting instead of at the track. Don't want a little spirited driving ending with me sideways into a concrete barrier. Also I've heard with TC off the car gets sideways pretty quickly if you don't watch yourself (and I certainly do not watch myself haha).
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01-22-2015, 01:12 PM	#15
Wes Howell www.facebook.com/weshowellcreative 59 Rep 623 Posts Drives: 2015 AW M4 Coupe Project Car Join Date: Feb 2011 Location: Instagram #weshowell iTrader: (1)	57 times eh? Wow, you're on quite the rampage. Congrats and good luck with that. Wide tires don't help straight line traction? ok.. Thanks for the enlightenment. All the dragsters and high HP car owners are going to feel SOOOO stupid.... My car has better traction with 295's than it did with the same rubber on 275's. whatever....
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