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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.

Cadillac Elmiraj Concept brings big coupe style to Pebble Beach [w/videos]

Two years ago, Cadillac absolutely floored us with the debut of its gorgeous Ciel concept at the Pebble Beach Concours d'Elegance. And since that droptop four-door's debut, we've seen plenty of its design language worked into the latest Cadillac products. Now, we're seriously hoping that history will repeat itself with this stunning new Elmiraj coupe concept, which makes its first public appearance in Monterey this week.
Cadillac states that the Elmiraj concept simply showcases the next step forward for the brand's Art & Science design DNA, and doesn't necessarily preview an upcoming model. But if you told us the Elmiraj was a conceptual look at the next-generation CTS Coupe, or a smaller, two-door version of a new flagship, we'd believe you. At 207 inches long, 76 inches wide and 55 inches tall, its dimensions are only slightly larger than the current two-door CTS.
Regardless of what the Elmiraj does or does not become, it's certainly a fantastic modern interpretation of the classic GT formula with its short front overhang, long hood, rakish roofline and petite rear deck. The strong character lines running along the sides and exaggerated 22-inch wheels round out the beautiful coupe, and Cadillac's signature vertical LED lighting elements are found at the front and rear. Also take note: the badge on the grille is a crest without a wreath, basically confirming our earlier report.

Cadillac ATS-V Coupe caught undisguised ahead of LA reveal

Vsport versions of the CTS and XTS sedans are all well and good, but what Cadillac enthusiasts have really been looking forward to is the arrival of the next full-on V model. And here we have it.
Spied in the nude during an apparent photo shoot ahead of its anticipated debut at the fast-approaching Los Angeles Auto Show, the upcoming new Cadillac ATS-V Coupe is set to pick up where the old CTS-V left off, only in a more compact form. Unlike previous spy shots of heavily disguised prototypes, this final version is showing a chrome-framed mesh grille, along with a deep lower air dam with what looks to be a carbon-fiber front splitter. That bulging hood with heat extractor vents is tipped to be packing a twin-turbo V6 engine, breathing out of quad exhaust tips.
The aggressive aero kit also encompasses side skirts, a reshaped rear bumper and a lip spoiler on the truck, while the upgraded rolling stock wears serious low-profile rubber and the brakes appear to be carbon-ceramic units. Peer through the window and you can even see the sport bucket seats with slots for racing harnesses. All of which suggests a serious American challenger to the BMW M4 and its ilk, and we're looking forward to seeing the vehicle in the metal in LA next month.