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Callaway debuts its new C7 Stingray at National Corvette Museum

Callaway showed off its first tuned version of the 2014 Corvette Stingray at the National Corvette Museum last week, giving the rampant enthusiasts of America's sports car a look at the roughly 620-horsepower, supercharged rocket.
Unlike the Corvette SC610 we showed you back in January, this Stingray packs a fair bit more oomph. Horsepower is only up ten ponies, but torque has jumped from 556 pound-feet to "at least" 600 pound-feet. Neither horsepower nor torque is official quite yet, although Callaway is expecting to know just what its creation can do once testing and validation is completed later this month.
The 6.2-liter, supercharged V8 now boasts a new, three-element intercooler, which Callaway claims only allowed the inlet air temperature to increase by ten degrees Fahrenheit during dyno runs. Previous designs saw a 35-degree-Fahrenheit jump. The exhaust system has also been fettled with, and now is even less restrictive.

Sinkhole Opens Up In National Corvette Museum, Swallows Eight Cars

More cars are being moved inside the National Corvette Museum in Bowling Green, Ky. to avoid falling down the same sinkhole that swallowed eight classic sports cars early this morning, Autoblog reported. Museum officials said the hole was discovered when motion sensors activated around 5:45 a.m. The rescue mission can be viewed on the museum's live feed cameras, which weren't working after the sinkhole emerged. A 1993 ZR-1 Spyder and a 2009 ZR1 "Blue Devil," both on loan from General Motors, were among the cars that fell into the sinkhole. The museum owned the other affected Corvettes, which included a 1963 Corvette, a 1984 PPG Pace Car and the 1 millionth Corvette ever produced. The state of the cars at the bottom of the hole isn't known, but trial lawyer and sinkhole expert Ted Corless said the cars may be a total loss for the museum and GM. "Most states, including Kentucky, exclude damage caused by sinkhole activity," he said. "There will be, in all likelihood, a claim made, but a lot of policies would specifically exclude these kinds of damages." Corless has 15 years experience dealing with sinkholes. He said that typically neither the building, nor the cars themselves are protected under their insurance policies. "I would have to say, more likely then not, they're going to have an uninsured loss measured in the hundreds of thousands of dollars." The museum is closed Wednesday while a structural engineer assesses the damage. Related Gallery 2014 Chevrolet Corvette Stingray Test Drive View 9 Photos Related Gallery 2014 Chevrolet Corvette Stingray Test Drive View 9 Photos Weird Car News Chevrolet GM corvette

Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.