Acceleration is limited by a car’s slowest part. That said, many people turn to the aid of short shifters to reduce throw times and increase the rate of acceleration, as stock shifters generally have long throws. The reason for the stock transmission’s long throw is simple: leverage. The longer the throw, the less force is required by the driver to shift gears. The willingness to give up a certain amount of leverage, however, will yield shorter shift times and increased acceleration.