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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.

Travis Kvapil tells Twitter his Sprint Cup car was stolen

There's a bizarre story coming out of Atlanta today, as NASCAR racer Travis Kvapil is reporting that his Sprint Cup Car was stolen from a lot at the Drury Inn in Morrow, GA. Kvapil announced the theft, which included the black pickup that was hauling the trailer and the #44 Chevrolet SS Sprint Cup Car – shown above, with driver JJ Yeley at the wheel – on Twitter. According to Kvapil, the car wasn't going to be ready for the Thursday test session at Atlanta Motor Speedway, although forecasts of snow forced the team to dispatch their main trailer and tools to the track ahead of the car, which left for Atlanta later yesterday. According to ESPN, police in Morrow have video of the "incident," which happened at 5:34 AM Friday, with police investigating it as as criminal in nature. "Sometimes what happens when thieves see trailers, they might just assume there's something in the trailer they can go off and sell," Sgt. Larry Oglesby, of the Morrow PD, told USA Today. "Sometimes when things like this occur, they will drop off the items in a parking lot somewhere – like a Walmart parking lot – once they realize what they have." "All we know is it was a silver jeep," team owner John Cohen told USA Today. "One guy got out and they pulled off together." Earlier, Cohen told ESPN that the theft will force the team out of this weekend's race at the Folds of Honor QuikTrip 500, at Atlanta Motor Speedway. Kvapil, meanwhile, has taken to Twitter to appeal to his followers to be on the lookout for the truck, trailer and race car. Here's hoping it turns up all together. Check out the driver's tweets, below. Wow. Anyone near Atlanta find my stolen Cup car let me know! Unreal - Travis Kvapil (@TravisKvapil) February 27, 2015 I bet when whoever has it, opens the trailer and is going to be like 'oh snap' - Travis Kvapil (@TravisKvapil) February 27, 2015 Ok, to clarify. @Teamxtreme44 transporter is @amsupdates. The guys stayed and worked on the car Thursday at the shop in NC. They drove.... - Travis Kvapil (@TravisKvapil) February 27, 2015 down last night in a Ford dually and enclosed trailer with racecar inside. That was stolen out of hotel parking lot this am in Morrow, GA - Travis Kvapil (@TravisKvapil) February 27, 2015 Black Ford dually, white enclosed tag behind trailer. New Jersey plates - Travis Kvapil (@TravisKvapil) February 27, 2015 Dang.... I'm wishing we had LoJack or something on it!

Lutz dishes dirt on GM in latest Autoline Detroit

Bob Lutz sits down for Autoline Detroit - Click above to watch video after the jump
Autoline Detroit recently played host to Bob Lutz, and, as is always the case, the former General Motors vice chairman dished out some great commentary. Lutz was promoting his new book Car Guys vs. Bean Counters: The Battle for the Soul of American Business, and talk quickly turned to his role as it related to product development and high-level decision making at GM. While on the topic of brand management, Lutz revealed a few rather interesting tidbits about his former employer:
All Chevrolet vehicles were required to have five-spoke aluminum wheels and a chrome band up front, as part of the Bowtie brand's overall image.