How to Perform a Launch Control Start in an Automatic Transmission Car?
3 Answers
Here are the steps for performing a launch control start in an automatic transmission car (using the BMW M4 as an example): 1. A launch control start puts significantly more strain on the engine and transmission compared to normal driving. Many manufacturers impose a limit on the number of launch control starts allowed, and exceeding this limit may void the warranty for engine or transmission damage. Therefore, it's essential to warm up the car before attempting a launch control start. 2. Turn off the ESP (Electronic Stability Program), which is equivalent to disabling DSC (Dynamic Stability Control) in the BMW M4. 3. Shift the transmission into manual mode to lock it in first gear. This maximizes the torque output from the engine by utilizing the highest gear ratio in first gear, providing the strongest launch torque. 4. Press the brake pedal all the way down, then press the accelerator pedal all the way down. The KICK-DOWN function here is like unlocking the car's full potential—holding the accelerator pedal down activates this mode, signaling the car that you need maximum performance, which in turn activates the launch control function. 5. Use the cruise control to adjust the engine RPM—up to increase, down to decrease—to control the maximum RPM when the accelerator is fully depressed. The peak torque RPM for gasoline engines is not at the highest RPM; this varies depending on the specific model. For the BMW M4, the peak torque RPM is between 3000-3500, so set the cruise control to a maximum of 3500 RPM. 6. Once the engine reaches the set maximum RPM, release the brake immediately, and the car will 'zoom' forward.
As a passionate motorsport enthusiast, I often perform launch control during track days to pursue the thrill of instant acceleration. The operation is actually quite simple: first park the car in a safe and open area, ensure the automatic transmission is in D or S mode, and turn off all electronic stability and traction control systems, otherwise they will limit power output. Then I press the brake pedal fully with my right foot while using my left foot or the tip of my right foot to press the accelerator, allowing the engine RPM to rise between 2000 and 3000 - just enough to hear the engine roar without hitting the redline. Suddenly release the brake, and the car shoots forward like an arrow. The whole process needs to be quick but rhythmically controlled; doing it too fast can easily cause tire spin. I must emphasize that this method causes significant wear to the transmission and clutch. After each test, I carefully check the fluid conditions and only perform this on professional tracks to avoid accidental vehicle damage or safety hazards.
I always prioritize safe driving. While launch control sounds exciting, it must be performed with caution. Here's my approach: First, check the vehicle's condition to ensure sufficient tire grip and dry road surface. Then start the engine, shift to D gear, disable traction control while keeping ABS active as a precaution. Firmly press the brake pedal with your right foot, while gently applying throttle with your left foot to around 2,500 RPM - avoid higher revs to prevent loss of control. When releasing the brake, be decisive but not abrupt. Maintain a firm grip on the steering wheel during the initial launch to counter body sway. I recommend beginners avoid this maneuver as it may cause transmission overheating, reduce lifespan, and increase accident risks. After testing, conduct a quick inspection to verify normal brake and powertrain operation.
