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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 ATS Coupe spy photos show more sedate two-door

Remember when the Cadillac CTS Coupe debuted, and we were all like, "Oh hello there?" Well, don't expect the same thing to happen when the new ATS Coupe is unveiled - these brand new (overexposed) spy shots show a two-door that's decidedly more sedate than the angular yet curvaceous and all-around good-looking CTS Coupe. This isn't to say that the smaller Caddy Coupe won't be attractive - the four-door version is plenty pretty, to be sure - it just likely won't have that extra somethin'-somethin' to truly set it apart from the sedan.
Fine, then. We don't doubt that the two-door ATS will be just as enjoyable to drive as its sedan sibling, with a lot of the mechanical stuff likely carrying over unchanged. That includes the powertrain options, meaning buyers will be able to choose from the naturally aspirated 2.5-liter inline-four, turbocharged 2.0-liter four, or larger free-breathing 3.6-liter V6.
Look for the 2014 ATS Coupe to enter production in January of next year, meaning a reveal later this year (LA Auto Show, perhaps?) would be in order.

Ford Mustang Shelby GT350R named Road & Track Performance Car of the Year

With a 526-horsepower, 5.2-liter V8 that roars to 8,250 rpm, it's really hard to consider the 2016 Ford Shelby Mustang GT350R an underdog in any fight. However, the Shelby held the lowest as-tested price and was only middle of the pack in terms of power in Road & Track's 2016 Performance Car of the Year challenge. The 'Stang's numbers clearly didn't tell the whole story about the potent coupe because Ford's muscle car grabbed the title in this year's test. A model needs to be new or significantly updated to be eligible for the honor, and R&T found an impressive slate of eight candidates this year. The challengers included the Bentley Continental GT3-R, Cadillac ATS-V Coupe, Chevrolet Corvette Z06, Dodge Viper ACR, Mercedes-AMG GT S, and Porsche Cayman GT4. The Ferrari 488 GTB was the most expensive of the bunch with an as-tested price of $347,942, which is five times more than the Shelby. Once the group was together, R&T hustled them over curving roads and on the National Corvette Museum Motorsports Park. There was a lot to love about the Shelby, even in this impressive crew. "With a flat-plane crank and Sport Cup 2 tires, the GT350R is a Mustang turned up to 11," editor-in-chief Larry Webster said in the announcement of the results. The GT350R joins some great company. Past winners include the Porsche 911 GT3 last year and the Corvette in 2013. For some fantastic photography and the complete appraisal of these performance machines check out R&T's website for the full story. Related Video: ROAD & TRACK NAMES THE FORD MUSTANG SHELBY GT350R THE 2016 PERFORMANCE CAR OF THE YEAR New York, NY (November 9, 2015) – Road & Track today named the Ford Mustang Shelby GT350R the 2016 Performance Car of the Year, beating out seven of the world's best new sports cars. The article appears in the December/January issue, on newsstands November 17, and on RoadandTrack.com. "With a flat-plane crank and Sport Cup 2 tires, the GT350R is a Mustang turned up to 11," said Larry Webster, editor-in-chief of Road & Track. "Not only does the car have soul and harness so much firepower with such ease, but the real achievement here is that it's so approachable. It's a car you can't help but love." The Mustang Shelby GT350R was the winner by a runaway vote.