2009 BMW 750i: Yup, There's an App for That
August 14, 2009
Followers of our long-term big Bimmer have probably heard about the throttle tip-in this car exhibits right off the line. I decided to post a graphical representation of it with the help of my iPhone and the Dynolicious application. Dynolicious uses the phone's accelerometers to measure the G load, figures those loads in with their duration and gives a decent calculation of speed, horsepower, torque and braking. The graph shows horsepower in yellow, speed in red and longitudinal Gs in blue.
See that graceful sweep at the beginning of the graph? That's the tip-in, a brief hesitation upon throttle application before the car really gets moving. A good, aggressive launch will give a flatter curve, as shown in the graph below. The top graph represents a launch in Comfort mode, while the bottom graph shows a launch in Sport+ mode. Personally, I like the idea of having the choice between these modes. If I want to drive like a chauffeur, I can glide away from a stop. If I want to drive like Jason Statham in the Transporter, the Sport+ makes that possible (except for the really silly stunts, of course).
Just for fun, here's a bonus graph of a Boeing 737 taking off from Atlanta.
Mark Takahashi, Associate Editor @ 13,881 miles