One of the cooler additions to the new Nissan GT-R is its multifunction computer, which among other things can tell you exactly how many G's you're experiencing as you fling it around the Nürburgring.

Perfect for Speed Racers and out-of-control Soyuz capsules, this DIY personal G-force meter attaches to your dashboard and enhances the driving experience when a mere speedometer won’t do. The device ...