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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > DCT & Launch Control

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      07-03-2018, 04:16 PM   #1
horsepower_and_hounds
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DCT & Launch Control

So question for the guru's,
Anybody know the ramifications of using launch control excessively or have heard of any ill effects? I have scoured the internet and only found speculation & looked up the info in the manual and it does not state much. Now I know is harder on components but so is dumping the clutch on a manual, burn outs, drifting, etc.

I ran at Z-Max last Friday and did aprox 22 launch control passes in 88-94 deg weather and not once did i get an error of trans overheating or anything out of the ordinary..... It just motored on as usual. Just curious what the more experienced owners know or have experienced.

Here is what is in the manual

"Launch Control"

The concept
Launch Control enables optimum acceleration on surfaces with good traction.

General information
The use of Launch Control causes premature component wear since this function represents
a very heavy load for the vehicle. Do not use Launch Control during the break-in,
refer to page 152, period.

Requirements
Launch Control is available when the engine is warmed up, that is, after uninterrupted driving
of at least 6 miles/10 km. To start with Launch Control do not steer the steering wheel.

Activate Launch Control
1.Deactivate Dynamic Stability Control, refer to page 114.
2. Select Sequential mode with gear 1.
3. With the engine running, apply the brake with the left foot.
4. Fully depress the accelerator pedal. The starting engine speed adjusts.
5. If necessary, change the starting engine speed by 500 rpm via cruise control.
6. Release the brake, the vehicle accelerates.

Continue to depress the accelerator pedal. Upshifting occurs automatically as long as the accelerator pedal is fully depressed. Launch Control is available again only after a certain distance has been driven.
System limits
This transmission has an overheating protection mechanism, which protects the clutch from extreme stress
Indicator lamp lights up yellow: transmission too hot. Avoid high engine stress and frequent starts.

Indicator lamp lights up red: transmission is overheating. Further driving at a moderate pace is possible. At the next opportunity, stop the car, shut off the engine and allow the transmission to cool down. Avoid fast starts, and on inclines did not accelerate lightly while letting the clutch slip; otherwise, the transmission may overheat.
During traffic jams or at very low speeds, use the Low Speed Assistant, refer to page 75.
Appreciate 1
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