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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.

Such Sweet Sorrow: Cadillac's CTS-V gets an Irish wake

As the saying goes, all good things must come to an end. The honkin', stonkin' second-generation CTS-V, powered by Cadillac's brawny supercharged 6.2-liter V8 has been a very good thing. And now that the 500 final coupes – the only CTS-Vs designated 2015 models – have been built (just five remain unsold as of this writing), it is indeed a good thing that's come to an end. But Cadillac is not letting 2009–2015 CTS-V go gently into that good night, even as its replacement is poised to debut in just in just two months at the 2015 Detroit Auto Show. Instead, Cadillac invited us to Austin's Circuit of the Americas racetrack for what it called an "Irish wake" for the model that has proven to be one of the quickest and most charismatic models in General Motors' history. If you don't know what an Irish wake is, if you envision storytelling, songs, debauchery and more than a little liquor, you'll be in the ballpark. In this case, though, adrenaline substituted in for the booze, with squealing tires and shrieking V8s providing the singing. The debauchery took the form of an all-you-can-drive lapping of COTA in all three bodystyles – coupe, sedan and wagon – and the stories were told by the grins plastered on our faces all day. First and foremost, we'll miss the CTS-V's perfect balance of luxury and sportiness. Even after six years with no major changes, the CTS-V is surprisingly spry. Certainly, you never forget that it's a heavy thing, weighing in anywhere between 4217 pounds for the manual-equipped coupe to 4424 for an automatic wagon, but with 0-60 times of about four seconds and the ability to hit about 150 mph on COTA's back straight, the Vs remain an absolute hoot on the track. Sure, some of its details – the blocky front fascia shapes and the spoiler on the sedan and coupe models, for example – look a bit dated, but the overall design still looks sufficiently badass. The interior design has worn pretty well, too, and however Cadillac may feel about center stack buttons being so last decade, we favor them over the capacitive-touch madness of today's CUE system. We're not going to bother doing another full review of the car here, but suffice it to say, there is plenty we will miss. First and foremost, will be the CTS-V's perfect balance of luxury and sportiness. Rumor has it that Cadillac will offer the 6.2-liter LT4 V8 in the next generation (we predict about 600 hp), but we hear that the new car will skew more toward luxury than balls-out performance.

Meet the other Cadillac wagon. It's as American as ABBA

The Cadillac CTS Wagon became a cult classic the second it went on sale. We all knew that it was never going to sell in anything approaching significant numbers, and if that "we" didn't include those actually working at GM, one would have to wonder what they were smoking. Cadillac was still having a hard enough time trying to convince people that it was now a BMW-fighting sport luxury brand rather than the purveyor of Grandpa-piloted land yachts. To many, a sport sedan like the CTS seemed like a stretch. But a CTS sport wagon? It sure seemed like GM was just doing things for funzies, an impression only enhanced by the CTS-V Wagon. Forget cult classic. That thing was an instant legend.  And yet, the CTS wasn't the only Cadillac of that era offered as a wagon. It wasn't even the first. Before GM said "to hell with it, let's have some fun" on this side of the pond, over in Europe, it had already taken a page from its old badge-engineering playbook to create the 2006 Cadillac BLS Wagon. It was available as a sedan, too, but its awkward majesty is best enjoyed as the long-roof model.  There's just something off about the whole thing, right? That's probably because it also looks vaguely familiar, as if you've seen it before. So where the hell does this thing come from? Sweden! Behind that Cadillac Art and Science face is a Saab 9-3, and in the case of the BLS Wagon, the Saab 9-3 Sport Combi wagon. The roofline is the dead giveaway, as no other wagon has ever looked like that. In fact, the roof and windows were the only exterior elements to copy directly over from 9-3 to BLS. No kidding. With the Cadillac front end, doesn't the Saab-funky-boxiness make it look like a miniature hearse? The answer is yes. GM's design team, led by Ed Welburn, was quite pleased with his work. Perhaps it even egged him on to create a real Cadillac sport wagon? "The whole team was very excited to apply Cadillac's design language to a wagon for the first time," said Welburn in a press release from the time. "The V-shaped chrome-plated grille, a Cadillac hallmark, is picked up again by the shape of the rear window, and the body side character lines make it unmistakably a Cadillac." The interior is surprisingly different from the 9-3, including the ignition switch migrating from the center console up to the steering column. It also wasn't exactly in keeping with the Cadillac norm of the time.