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F22 / F23 2 Series (2014 - Current)
The 2 Series coupe is the replacement for the E82/E88 1 series coupe. Production starts in November 2013 on the 228i (N20) and M235i (N55) coupes. Look for them in dealerships in February 2014. The convertible F23 2 series will follow in the fall of 2014.

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  #1  
Old 12-02-2013, 11:36 AM
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Chris90 Chris90 is offline
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M235i LSD requires disabling DSC

Saw this today:

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A highlight in the suspension area is the BMW M Performance limited-slip differential available for the BMW M235i Coupé. When the dynamic stability control function DSC is deactivated, the torque-sensitive mechanical limited-slip differential in the rear axle ensures traction-optimised distribution of drive torque between the rear wheels.
I sure hope this doesn't mean you have to completely disable DSC to benefit from the LSD. Hopefully it means you can partially disable it and still have stability control active.
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  #2  
Old 12-02-2013, 11:55 AM
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tim330i tim330i is offline
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Sounds the same as the E46 M3. You don't get the full benefits of the LSD unless the DSC is off.

Tim
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  #3  
Old 12-04-2013, 07:45 AM
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need4speed need4speed is offline
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Wow, was not expecting that. N4S
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  #4  
Old 12-21-2013, 08:23 PM
pw4 pw4 is offline
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So does that mean the LSD doesn't work at all until the DSC is off, or it only partly works, or it works all the time but you don't notice it so much until the DSC is off?
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Old 12-22-2013, 09:13 AM
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tim330i tim330i is offline
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Originally Posted by pw4 View Post
So does that mean the LSD doesn't work at all until the DSC is off, or it only partly works, or it works all the time but you don't notice it so much until the DSC is off?
It is a mechanical LSD so it is always 'working'. The full benefits are closer to the limit, which DSC will not let you take advantage of.

Tim
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  #6  
Old 01-25-2014, 10:59 AM
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BentZero BentZero is offline
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I know that this is a n00b question, but why do I want a LSD? I'm never going to track my car. Maybe autoX, but that's it. There just aren't any tracks close enough. With that in mind is a LSD useful on surface roads? Thanks.
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Old 01-26-2014, 11:33 AM
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av98 av98 is offline
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LSD based diffs allow proper wheel slip towards the wheel that needs power. Mechanical are best because they have a linear response similar to a hydraulic powered or non-powered steering system. The DSC system is based off electrical sensors that vary assist; faster responding which is at times un-natural non-progressive interference. The best analogy is if your rear end oversteers aka steps out; with an LSD it's a slow progressive slide, while on a DSC you may have a slide that slows then goes faster and vice versa, as the DSC kicks on and off to help you control the slide; not linearly predictable.


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  #8  
Old 02-16-2014, 06:26 AM
goldenbb goldenbb is offline
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Your explanation is correct except that when the rear-end kicks out, that is known as "understeer" not "oversteer." Understeer is also known as push, or the car wants to head towards the outside of the turn. Oversteer is the opposite, the car literally "steers to much" into the turn and wants to put you into the inside of the turn.
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Old 02-16-2014, 09:43 AM
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sno_duc sno_duc is offline
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Quote:
Originally Posted by goldenbb View Post
Your explanation is correct except that when the rear-end kicks out, that is known as "understeer" not "oversteer." Understeer is also known as push, or the car wants to head towards the outside of the turn. Oversteer is the opposite, the car literally "steers to much" into the turn and wants to put you into the inside of the turn.
Understeer = first generation Pontiac Fiero's (turn the wheel at speed and it keeps going staight)
Oversteer = early 911's (lift in a corner and the rearend tries to pass you on the outside)
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Old 02-26-2014, 05:14 PM
MP87 MP87 is offline
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Quote:
Originally Posted by goldenbb View Post
Your explanation is correct except that when the rear-end kicks out, that is known as "understeer" not "oversteer." Understeer is also known as push, or the car wants to head towards the outside of the turn. Oversteer is the opposite, the car literally "steers to much" into the turn and wants to put you into the inside of the turn.
Actually I think av98's explanation is correct. It's oversteer because when your rear-end is sliding, your front-end is steering more than you asked for like in sno_duc's 911 example.
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  #11  
Old 02-26-2014, 11:41 PM
darcivic00si darcivic00si is offline
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Originally Posted by mp87 View Post
actually i think av98's explanation is correct. It's oversteer because when your rear-end is sliding, your front-end is steering more than you asked for like in sno_duc's 911 example.
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  #12  
Old 02-27-2014, 08:16 AM
hyperzulu hyperzulu is offline
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goldenbb's explanation is correct as well. I don't know why he contradicts himself by saying the kick out is not oversteer but then goes on to say exactly that in his definition. Understeer is when the front end pushes to the outside. Oversteer is when the rear end pushes to the outside (i.e. kicks out). Everyone is right.
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  #13  
Old 02-27-2014, 05:23 PM
MP87 MP87 is offline
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Originally Posted by hyperzulu View Post
goldenbb's explanation is correct as well. I don't know why he contradicts himself by saying the kick out is not oversteer but then goes on to say exactly that in his definition. Understeer is when the front end pushes to the outside. Oversteer is when the rear end pushes to the outside (i.e. kicks out). Everyone is right.
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