1968 Chevelle Malibu on 2040-cars

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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.

Looking back at the Citation IV concept that likely shaped the GM EV1

Those who forget history are condemned to repeat it. We're not sure how that applies to the GM EV1, but we'd still like to share something from Autoline Daily, an online automotive new show with our friend John McElroy. He's been covering the business for decades now and recently found something interesting: pictures of the 1984 Chevrolet Citation IV concept, seen above. Displayed half a decade before the first electric concept that would become the EV1 (inset), McElroy says it's now clear that the elegant, aerodynamic EV1 took a lot of styling cues from the Citation IV, which was developed in part thanks to GM's new-at-the-time Aerodynamics Laboratory. We agree with him that the spats over the rear wheels, the flush glass, and the covered headlights all bear a certain kind of similarity between the two cars. That the colors almost match is a nice coincidence. The Impact (the concept version of the EV1) looked "frumpier," McElroy says, because it wasn't as long as the Citation. You can read a lot more about the Citation IV here and check out McElroy's thoughts in the video below. Find the Citation starting at around 3:45. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2016 Chevy Camaro performance figures released

If you want to make a car faster, there are two sure-fire ways to get the job done – add power and/or reduce weight. Chevy has done both for the 2016 Camaro, putting as much as 455 horsepower into its muscle coupe and shaving a few hundred pounds from every trim. That range-topping power comes courtesy of a 6.2-liter V8 engine, and it's enough grunt to push an automatic-equipped Camaro SS to 60 miles per hour in just 4.0 seconds flat (4.3 seconds with a manual) and down the quarter mile in 12.3 seconds at 116 mph (12.5 at 115 for the stick). Not coincidentally, those acceleration specs, at least on paper, put the V8-powered Camaro SS just above the Mustang GT on the muscle-car pecking order. When the road gets twisty, Chevy claims the Camaro SS can generate as much as .97 g on the skidpad. And, thanks in part to its Goodyear Eagle F1 summer tires, the SS can stop from 60 in as little as 117 feet. We look forward to finding out how nimble the new Camaro feels when compared to its primary competitors. <p>Your browser does not support iframes.</p> Moving down one notch to the 335-hp 3.6-liter V6, properly equipped 2016 Camaro coupes can hit 60 in as few as 5.1 seconds and cover the quarter in 13.5 at 103. Perhaps even more intriguingly, the 2.0-liter turbocharged four-cylinder and its 275 horsepower (the only configuration quicker with a manual transmission, incidentally) can propel the Camaro to 60 in 5.4 seconds and through the 'ol 1320 in 14 seconds flat. That's seriously quick, but buyers comparing the Camaro to the Mustang will find that the EcoBoost 2.3-liter is a bit more powerful (310 hp and 320 lb-ft) and quicker (5.1 seconds to 60). Chevy is making lots of noise about the efforts its engineers went through to shed weight from the 2016 Camaro, going so far as to shave down suspension bolts so that no thread went unthreaded. The weight-saving obsession pays off – base Camaro models are down 390 pounds while the SS model drops 223 pounds over the 2015. The 2016 Camaro SS boasts a power-to-weight ratio of 8.1 lbs per pony, a 14-percent improvement over the last-gen. Even though weight is down, chassis stiffness is said to be up by 28 percent over the fifth-gen Camaro coupe. Also of note: The Camaro is now lighter than the Mustang across the board when comparing like-to-like configuration levels. The 2016 Chevy Camaro starts at $26,695 (including $995 for destination).