How does DCT handle a spin?

MysticBlue · 06-24-2008, 10:17 AM

Something to always keep in mind at the track (and on the street for that matter) is if you spin, clutch in. Does anybody know how DCT will handle a spin. Obviously, it's best to avoid a spin, but it happens. Is it smart enough to disengage the clutch or are you going to end up with the potential to damage the engine and/or the transmission if you spin and roll backwards? Anybody know? I guess full on braking would do it; you would just have to know not to release the brake while rolling backwards.

mofomat · 06-24-2008, 10:22 AM

Quote:

Originally Posted by MysticBlue

Something to always keep in mind at the track (and on the street for that matter) is if you spin, clutch in. Does anybody know how DCT will handle a spin. Obviously, it's best to avoid a spin, but it happens. Is it smart enough to disengage the engaged clutch or are you going to end up with the potential to damage the engine and/or the transmission if you spin and roll backwards? Anybody know? I guess full on braking would do it; you would just have to know not to release the brake while rolling backwards.

If it's anything like SMG II (and I'm sure it is) then it will disengage the clutch if it needs to.

Seriously. Do you not think BMW will have thought of this?

skierman64 · 06-24-2008, 11:11 AM

Excellent question, I was wondering the same thing. I do know there are accelerometers built into the transmission logic, hopefully they disengages the clutch in a spin situation. However I'd like to hear it from BMW or a knowledgeable source.

GT3 Tim · 06-24-2008, 11:30 AM

Somebody has to test it out...simple as that. We won't know until somebody does it. lol

MysticBlue · 06-24-2008, 11:41 AM

Quote:

Originally Posted by mofomat

If it's anything like SMG II (and I'm sure it is) then it will disengage the clutch if it needs to.

Seriously. Do you not think BMW will have thought of this?

Seriously. Yes, I would assume BMW would have thought of that. I just hadn't seen it discussed yet, was curious, so I thought I would throw it out there. Sorry if I took time out of your busy day.

swamp2 · 06-24-2008, 01:21 PM

Quote:

Originally Posted by mofomat

Seriously. Do you not think BMW will have thought of this?

+27

man02195 · 06-24-2008, 02:58 PM

Both feet in, um, ok 1 foot on the brake and one foot on the foot rest?

skierman64 · 06-24-2008, 03:44 PM

I will test it out, but only on ice or snow. I don't feel like learning the hard way that the clutch doesn't disengage.

Dascamel · 06-24-2008, 10:47 PM

Expecting the car to stall?

skierman64 · 06-24-2008, 10:54 PM

Quote:

Originally Posted by Dascamel

Expecting the car to stall?

The concern is that during a spin on pavement when the car is going backward in the spin that the clutch doesn't disengage and thus the wheels turn the drivetrain, transmission and engine backward which isn't all that good for anything.

enigma · 06-24-2008, 10:58 PM

Quote:

Originally Posted by GT3 Tim

Somebody has to test it out...simple as that. We won't know until somebody does it. lol

Give me a month

reinaldo335 · 06-24-2008, 11:09 PM

i think it should be the same way as smg

enigma · 06-24-2008, 11:15 PM

Quote:

Originally Posted by reinaldo335

i think it should be the same way as smg

It will be but we need to quiet the crowd that is convinced that DCT will blow up the car, eat your children, and hang a sign on you back that says "kick me".

sayemthree · 06-24-2008, 11:23 PM

both feet in.....uh....er, both hydro-electrons in?

malter2.0 · 06-24-2008, 11:24 PM

Quote:

Originally Posted by skierman64

The concern is that during a spin on pavement when the car is going backward in the spin that the clutch doesn't disengage and thus the wheels turn the drivetrain, transmission and engine backward which isn't all that good for anything.

I don't know about mdct, but I'm pretty sure that on manual transmission cars, engine will stall before wheels start going backwards, unless of course you dig both feet before the spin takes you backwards.

swamp2 · 06-25-2008, 01:01 PM

Quote:

Originally Posted by enigma

It will be but we need to quiet the crowd that is convinced that DCT will blow up the car, eat your children, and hang a sign on you back that says "kick me".

Nice, that is seriously funny. Sounded much more like a typical T Bone post rather than one from you.

06-24-2008, 10:17 AM	#1
MysticBlue Lieutenant Colonel 369 Rep 1,887 Posts Drives: '20 M5C, '09 M3 DCT Coupe Join Date: Apr 2008 Location: Eastern Oregon... They call 'em rigs here iTrader: (0)	How does DCT handle a spin? Something to always keep in mind at the track (and on the street for that matter) is if you spin, clutch in. Does anybody know how DCT will handle a spin. Obviously, it's best to avoid a spin, but it happens. Is it smart enough to disengage the clutch or are you going to end up with the potential to damage the engine and/or the transmission if you spin and roll backwards? Anybody know? I guess full on braking would do it; you would just have to know not to release the brake while rolling backwards. Last edited by MysticBlue; 06-24-2008 at 12:01 PM..
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06-24-2008, 11:11 AM	#3
skierman64 Brigadier General 127 Rep 3,071 Posts Drives: E92M3-E46M3-E46Wagon-E89Z4-E36 Join Date: Dec 2006 Location: Greater St Louis Metro area iTrader: (1) Garage List 1994 325is Race Car [0.00] 2011 BMW Z4 [0.00] 1998 M3 Coupe [0.00] 2008 M3 Coupe [0.00]	Excellent question, I was wondering the same thing. I do know there are accelerometers built into the transmission logic, hopefully they disengages the clutch in a spin situation. However I'd like to hear it from BMW or a knowledgeable source. __________________ Invest Wisely...The best mod for your money?? BMWCCA high performance driver's school. The mod that lasts a lifetime and improves the performance of any car you drive[/LEFT]
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06-24-2008, 11:30 AM	#4
GT3 Tim Moderator 94 Rep 1,920 Posts Drives: 2014 MB E63S Join Date: Feb 2008 Location: Sacramento, CA iTrader: (0)	Somebody has to test it out...simple as that. We won't know until somebody does it. lol __________________ Tim <--- apparently likes "3" cars 2014 E63S -- The Rocket 2014 F30 328i -- Kids car 2008 E90 M3 -- Sold 2004 GT3 -- Sold 1997 M3/4 -- Sold 1995 M3 -- Sold
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06-24-2008, 02:58 PM	#7
man02195 Lieutenant 19 Rep 492 Posts Drives: e90 M3 M-DCT, SG-status 111 Join Date: Jan 2007 Location: NC iTrader: (0)	Both feet in, um, ok 1 foot on the brake and one foot on the foot rest? __________________ E90 M3 Sedan
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06-24-2008, 03:44 PM	#8
skierman64 Brigadier General 127 Rep 3,071 Posts Drives: E92M3-E46M3-E46Wagon-E89Z4-E36 Join Date: Dec 2006 Location: Greater St Louis Metro area iTrader: (1) Garage List 1994 325is Race Car [0.00] 2011 BMW Z4 [0.00] 1998 M3 Coupe [0.00] 2008 M3 Coupe [0.00]	I will test it out, but only on ice or snow. I don't feel like learning the hard way that the clutch doesn't disengage. __________________ Invest Wisely...The best mod for your money?? BMWCCA high performance driver's school. The mod that lasts a lifetime and improves the performance of any car you drive[/LEFT]
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06-24-2008, 10:47 PM	#9
Dascamel Lieutenant Colonel 48 Rep 1,664 Posts Drives: 2008 e92 M3, 2010 e91 328i Join Date: Jul 2007 Location: Bakersfield, CA iTrader: (0)	Expecting the car to stall? __________________ 2008 E92 M3 Jerez Black,DCT,Fox Red ext,Prem,Tech,19", ipod/usb, CF roof and trim 2010 E91 328i Space Gray,Black int, M sport, most options 2007 Montego Blue 335i (retired)
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06-24-2008, 11:09 PM	#12
reinaldo335 First Lieutenant 22 Rep 351 Posts Drives: m3 ZCP 6MT, on order 09 m3 6MT Join Date: Aug 2007 Location: puerto rico iTrader: (0)	i think it should be the same way as smg
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06-24-2008, 11:23 PM	#14
sayemthree Major General 597 Rep 5,448 Posts Drives: ‘20 X3mC ‘20 Raptor ‘04 X3 6mt Join Date: Aug 2007 Location: usa so cal , AZ iTrader: (0)	both feet in.....uh....er, both hydro-electrons in? __________________ Fore Sale Rare 6 speed manual X3 3.oi silver over grey. PM me
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