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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.

Hennessy wastes no time in supercharging the 2015 Cadillac Escalade

The ink is still drying on the all-new 2015 Cadillac Escalade sales brochures, but that hasn't stopped Texas-based Hennessey Performance (HPE) from leaping out of the gate with its own high-performance variant. In stock form, the big fourth-generation Cadillac flagship arrives with a new small block naturally aspirated 6.2-liter Ecotec3 V8 delivering 420 horsepower and 460 pound-feet of torque. Fresh out of the showroom, the 5,900-pound SUV will sprint to 60 mph in 5.9 seconds.
While that is plenty fast for some owners, others don't want to be shamed by a 550 horsepower Mercedes-Benz GL63 AMG or a 510 horsepower Land Rover Range Rover Sport - both will leave the stock Escalade at a stoplight.
The team at HPE has come to the rescue with its HPE550 supercharger upgrade, which includes a belt-driven supercharger, air-to-water intercooler, recalibrated engine management software and a three-year/36,000 mile powertrain warranty. With 6 psi of boost, the direct-injected 6.2-liter is tuned to deliver an impressive 557 horsepower and 542 pound-feet of torque - gains of 32 percent and 18 percent, respectively, over stock. Although HPE isn't releasing performance figures as of yet, our math says that should be enough power to put the two Europeans in the Cadillac's rearview mirror. The company also offers a set of 20-inch lightweight H10 forged monoblock wheels, to further improve performance.

Almost half of US Cadillac dealers say no to ELR plug-in hybrid

If you've got $75,995 (or so) burning a hole in your pocket and a hankering for the new Cadillac ELR, you'd better call your local dealer before you burn up shoe leather and gasoline to head down there. According to a report on Edmunds, only about 56 percent of the brand's 940 dealers have signed up to carry the premium plug-in hybrid. As much as we'd like to see the more affluent among us driving on electricity, we can certainly understand the dealers' apparent lack of enthusiasm. The article cites costs of up to $15,000 for tools and training to sell the ELR. Show floor real estate is another consideration for dealers who aren't enthusiastic about sacrificing space for a for a vehicle with initial sales – just 46 units nationwide in the first two months, but that volume is expected to increase – that are as mediocre as our first drive impressions. Still, for those locations that co-habitate with Chevrolet dealers who already participate in the Volt program, the extra expenditure shouldn't be too onerous. The two vehicles share the same basic electro-mechanical drivetrain, so those dealerships should have most of the needed infrastructure already in place. The bulk of ELR sales, according to Cadillac's global marketing director Jim Vurpillat, are expected to be in along the coasts, in places like California, Miami and New York. Featured Gallery 2015 Cadillac ELR: First Drive View 25 Photos News Source: Edmunds Green Cadillac Electric cadillac elr