A BMWs drive belt powers the accessories like the alternator, water pump(except some newer models), power steering pump, A/C compressor and the fan. It would make sense then, that reducing the amount of power these accessories draw from the engines output, the more power you have at the wheels.
Windows Portable Devices. Windows Portable Devices (WPD) is a driver technology that supports a wide range of portable devices such as mobile phones, digital cameras, and portable media players.
HOW TO OPEN A .WPD FILE? Launch a .WPD file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, an application such as Corel WordPerfect X7 will open your .WPD file. It's possible you may need to download or purchase Corel WordPerfect X7 or another application.