Motor Trend’s Jonny Lieberman takes the Porsche 911 Turbo and the Corvette ZR1 out to Willow Springs Raceway and the Mojave Spaceport’s 12,000-foot runway and put both cars through a lineup of instrumented tests. The wheelman for the tests was 24 Hours of Le Mans winner and GT2 world champion Justin Bell. Both cars excelled in different parts of the test but one of the cars broke and was unable to run the standing mile. Lastly, Bell is the first race car driver I’ve seen to really play with the Corvette ZR1’s Performance Traction Management System. Can it make a professional driver better? Get his opinion and more in the video after the jump.