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How GM's grueling 24-hour test gets the kinks out of its performance cars

One of the biggest challenges automakers face when designing a high-performance car is making sure that it is both fast and reliable. For General Motors, any car that might be taken to the track by its owner - like the Corvette, Camaro Z/28 (shown above) and the Cadillac CTS-V, for example - undergoes a rigorous and strenuous 24-hour test by engineers at the Milford Proving Grounds, as pointed out by Car and Driver.
We've posted on this topic in the past - on a video showing the Camaro ZL1 being brutalized, for instance - but this article gives a more in-depth look at what actually happens behind the scenes... including what that poor ZL1 went through. Though the test isn't for 24 hours straight, the cars are pushed as hard as possible by some of GM's best drivers with only the brakes and tires replaced frequently.
We don't want to ruin the fun for you, but it is an interesting article that tells just some of what GM does to develop its sports cars. Check out the full article over at Car and Driver for the rest of the story.

2019 Cadillac CT6-V preorders start at $89,785

Cadillac's top-of-range sedan will start at less than $90,000, just barely. At the North American International Auto Show in Detroit, Cadillac announced it is opening preorders for the 2019 CT6-V, which will start at $89,785. Keeping things exclusive, Cadillac has 275 preorder slots available to the U.S. market for the CT6-V. It will briefly join the ATS-V and the CTS-V to give Caddy a trio of powerful sedans before the ATS-V and CTS-V bow out after the 2019 model year to make way for new models. Cadillac offers less powerful V-Sport variants, as well. The CT6-V, formerly the CT6 V-Sport, uses a Cadillac-exclusive powertrain. The twin-turbo 4.2-liter V8 makes a claimed 550 horsepower and 627 lb-ft of torque. This engine is hand-built and nicknamed the "Blackwing." It is linked to a 10-speed automatic transmission, which puts power to the ground through Cadillac's all-wheel-drive system. As an added luxury perk to buying the CT6-V, Cadillac will include 2 days at the V-Performance Academy at Spring Mountain. The trip is essentially all expenses paid, with tuition and luxury accommodation part of the package. Cadillac estimates the first CT6-V models to arrive in mid-2019. Now, it was widely reported that the Detroit-Hamtramck production facility that builds the CT6 would be among those closed by GM. Cadillac President Steve Carlisle told Automotive News, however, that the company is exploring production alternatives to keep the flagship luxury sedan for sale in the United States. Apparently, it was never actually on the chopping block, and instead, officials at the time of the plant closure announcement failed to mention that CT6 production would be moved rather than cancelled. Where that new facility would be has yet to be announced, but Carlisle told Automotive News that moving production to China, where the CT6 Plug-In Hybrid is built, is "the least-preferred option." Related Video:

Driving the 2016 Cadillac CTS-V at the old Elkhart Lake road course

The placid community around Elkart Lake, WI, looks about as far removed from a glorious motorsport venue as you can imagine. A turn of the century downtown gives way to old-school resorts, beaches, and boat launches around the picturesque lake, with farms framing the rolling hills all around. But it was those very same meandering country lanes that gave birth to one of America's greatest racing circuits, some 65 years ago. Between the first race in 1950 and the opening of the dedicated Road America track in 1956, the roads around Elkhart Lake provided the setting for some great post-war racing. Competing on public streets was ultimately outlawed across the country, but not before drivers risked life and limb in the name of glory in the Wisconsin summer. Cadillac asked us out to the area recently, not to talk racing history, but to look forward at one of the most track capable cars the company has ever offered: the 2016 CTS-V. We got to drive the 640-horsepower beastie for an entire morning of hot laps at Road America, but unfortunately, we're not allowed to tell you about all of that right now. You'll have to wait until the embargo lifts on August 3, at which point we promise a full recounting of our adventure. Having the CTS-V for a full two days though, and in the spirit of the motorsport that imbues the air in Elkhart Lake, we took the Cadillac on a drive around the old 6.5-mile road course. Come for the new Caddy, but stick around to find out what the hell Wacker's Wend is. Cadillac Luxury Performance Videos