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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.

2019 Autoblog Technology of the Year finalists revealed

Every fall, we line up a range of new models with the latest and most compelling automotive technology from the past year. We test everything from semi-autonomous systems like Tesla's Autopilot to trick suspension setups like the Multimatic spool-valve shocks on the Chevy Colorado ZR2. We spend months paring down the list to a small group of contenders. After testing, dinner and healthy debate, we tally up the votes and name our winner. For Autoblog's 2019 Technology of the Year Award, our three finalists are the Cadillac CT6 with Super Cruise, the Infiniti QX50 with Variable Compression Turbo and the Mercedes-AMG E 53 with EQ Boost. Super Cruise is an advanced SAE Level 2 semi-autonomous system, though Cadillac (unlike some of its rivals) is reluctant to push that point. Cadillac would like you to think of this as an advanced driver assistance feature rather than a semi-autonomous system. Super Cruise allows completely hands-free highway driving. Thanks to a driver-facing camera, the system forces the driver to keep his or her eyes on the road even if hands are off the wheel. Although the CT6 is being discontinued, look for Super Cruise to make its way to other Cadillacs soon. VC Turbo is a little more complicated. Basically, Infiniti's 2.0-liter turbocharged inline-four can vary the compression ratio on the fly. In general, turbocharged engines are more efficient than naturally-aspirated engines when on boost, but can perform worse at low revs. VC Turbo allows for a best-of-both-worlds situation, increasing the compression at low revs and backing it off once the turbo spools up. The best part is that it does so seamlessly, with only a dash readout letting you know what's going on under the hood. Our third finalist is the EQ Boost 48-volt system in the Mercedes-AMG E 53. Like VC Turbo, EQ Boost does a lot just beneath the surface. Mercedes has developed a new turbocharged 3.0-liter inline-six and paired it with a small electric motor. While the car can't run on electricity alone, the motor helps improve both efficiency and performance, smoothing shifts and filling in low-end torque before the turbos spool up. Think torque fill, similar to a McLaren P1. Who can complain about better fuel economy and more torque? Look for the 48-volt system to make its way into most of the Mercedes-Benz lineup. The winner will be revealed next week on Autoblog, and we'll present the award Jan. 15 at the Detroit Auto Show. Related Video:

General Motors posts record earnings, but global sales fall

General Motors started the year with record success. The automaker's $2.7 billion in adjusted earnings before interest and taxes was its highest ever in in the first quarter of 2016, up from $2.1 billion in from the same time period a year earlier. Net income grew to $1.95 billion, which was more than double the $953 million in the same period last year. The company's figures also beat analysts' predictions, according to the Detroit Free Press. Despite the financial growth, global sales actually decreased by 2.5 percent to 2.36 million vehicles. "We're growing where it counts, gaining retail share in the US, outpacing the industry in Europe and capitalizing on robust growth in SUV and luxury segments in China," CEO Mary Barra said in the company's financial announcement. GM did well in North America with an adjusted EBIT of $2.3 billion, up from $2.2 billion last year. Sales in the region also grew 1.2 percent to 800,000 vehicles. According to The Detroit Free Press, the company has been especially successful at selling more expensive models in the US. The company's average vehicle was $34,600 in Q1, about $3,000 more than the industry average. Elsewhere in the world, GM also showed improvement. Europe practically broke even after losing about $200 million last year, and Opel and Vauxhall sales grew 8.4 percent to more than 300,000 vehicles for the quarter. South America only lost $100 million, which was half as much as Q1 2015's $200 million loss. China remained flat at $500 million of income. Cadillac volume jumped 6.1 percent there, and Buick's deliveries increased 22 percent, thanks to the Envision crossover's success. GM Reports First-Quarter Net Income of $2.0 Billion 2016-04-21 EPS diluted of $1.24; First-quarter record EPS diluted-adjusted of $1.26 First-quarter record EBIT-adjusted of $2.7 billion GM Europe posts break-even performance DETROIT – General Motors Co. (NYSE: GM) today announced first-quarter net income to common stockholders of $2.0 billion or $1.24 per diluted share, compared to $0.9 billion or $0.56 per diluted share a year ago. Earnings per share diluted-adjusted for special items was a first-quarter record at $1.26, up 47 percent compared to the first quarter of 2015. The company set first-quarter records for earnings and margin, with earnings before interest and tax (EBIT) adjusted of $2.7 billion and EBIT-adjusted margin of 7.1 percent.