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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.

Watch the 2014 Cadillac CTS live-stream reveal

Despite many an image leaking onto the Internet over the weekend, today is the official day for the debut of the all-new 2014 Cadillac CTS. You want the nitty-gritty details of Cadillac's new sedan? Click here.
If you want to watch the 2014 CTS makes its live debut in front of a throng of auto journalists, then just watch below, as Cadillac is live-streaming the event at 7:15 PM EST. That's only a few minutes from now, so click here to start watching, and stay tuned for our first live images of the CTS from the New York Auto Show.

Cadillac XT4-V on the way?

An anonymous photographer sent Cadillac Society two tightly cropped images of an XT4 crossover wearing two surprising badges. On the right, above the taillight, there's a 2.7 badge, In the lower right corner there's a V Series badge — the full-fat, multicolored V badge, not the monochrome V-Sport version. The images — assuming they're real — elicit more questions and no answers, the first being, is this the XT4 V-Sport that's been rumored since last October? Back then, GM Authority discovered front and rear images of such a vehicle hiding in plain sight, on a Cadillac site landing page. The backside of a thick-hipped XT4 is graced with the old V-Sport badge. We know the carmaker has split its V Series cars into two tiers, the lower intended to be less intimidating than before, the upper tier the continuation of the mongo V Series cars we've known and loved. The hints have been that the entry level will be called V Series, while the upper level takes the name "Blackwing," after the name of Cadillac's new 4.2-liter, twin-turbo V8 engine. With Mark Reuss himself having said, "We got rid of all the V-Sports," this supposed XT4-V offers more proof that V Series effectively represents a new V-Sport line. The only cosmetic giveaways to increased performance we can see are a carbon fiber trim in the license plate area, and an exhaust treatment similar to that on the recently introduced CT4-V. We're not certain what the 2.7 badge means for V branding on crossovers. The standard XT4 wears a 2.0 badge on the tailgate, representing its 2.0-liter four-cylinder with 237 horsepower and 258 pound-feet of torque. The XT5 gets a number, too, but the XT6 does not. GM's 2.7-liter four cylinder with 311 hp and 348 lb-ft first showed up in the Chevy Silverado, will get 320 hp and 369 lb-ft in the coming CT4-V, and has been predicted for the XT4-V. However, V cars — both Sport and Series — have never worn displacement badges. The new CT4-V and CT5-V go without numerical identifiers on their decklids. If there is an XT4-V on the way this year, we only have a few months before we see it and get some answers.