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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.

Autoblog Podcast #326

Easter Jeep Safari concepts, Shelby 1000, 2014 Cadillac CTS and Mercedes CLA45 AMG leaks
Episode #326 of the Autoblog Podcast is here, and this week, Dan Roth and Zach Bowman talk about this year's Easter Jeep Safari concepts, the 1,200-horsepower Shelby 1000 and leaked images of the 2014 Cadillac CTS and Mercedes-Benz CLA45 AMG. We wrap with your questions and emails, and for those of you who hung with us live on our UStream channel, thanks for taking the time. Keep reading for our Q&A module for you to scroll through and follow along, too. Thanks for listening!
Autoblog Podcast #326:

2014 Cadillac CTS Vsport [w/video]

Bridging The Gap With Power And Poise
As you read these words, West Coast Editor Michael Harley is preparing to drive the brand-new 2014 Cadillac CTS along the gorgeous, sun-drenched roads of Southern California. And while I'll wait for Harley's full report before I put words in his mouth, I'm willing to bet he enjoys the hell out of Cadillac's new CTS. In fact, I'm sure of it.
I say this with confidence because, about a month ago, I spent the better part of a day flogging the new CTS Vsport around the 2.9-mile Milford Road Course - a challenging circuit laid out in the infield of an oval test track at GM's proving grounds in southeast Michigan. The MRC was built about a decade ago after Bob Lutz was lured out of retirement to work closely with GM's product development team, and thus, this circuit is known informally as the "Lutz Ring." The main objective of the MRC was to have an in-house facility for engineers to fine-tune vehicle dynamics, without having to constantly schlep cars over to Germany's infamous Nürburgring. (Of course, they still do.)