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2016 Chevrolet Colorado Diesel First Drive [w/video]

The first thing you notice inside the diesel Chevy Colorado is that it's quiet. Almost too quiet. A lot has been done to quell noise and vibration with this new powertrain, and it shows – or rather, doesn't. There's some characteristic diesel clatter at idle, but even then it's distant and practically disappears as you start moving down the road. At full throttle, when the engine is at its noisiest, the sound isn't particularly diesel-like, just a pleasant intake breath. The accompanying smoothness is almost eerie. When we ask where all the noise went, Chevy's engineers, marketing guys, and PR reps all explain that this refinement is what Americans want. We're still not sure. This is a truck, after all, and the diesel pickup customer is different from the guy buying a diesel Cruze for his highway commute. Chevy contends that they're also not the same as the buyer of a Silverado HD. Although this 2.8-liter Duramax four-cylinder has been in service elsewhere around the globe, its first US application is in the Colorado and its GMC Canyon twin. The engine puts out 181 horsepower and 369 pound-feet of torque, and it does so unobtrusively as a result of a lot of modifications for our market. To keep normal diesel sensations out of the cabin, the intake and oil pan both get acoustic treatments. A new, thicker material is used for firewall sound deadening. Redesigned balance shafts have tighter tolerances to increase smoothness. The diesel powertrain is smoother than the Colorado's gasoline V6. One of the more interesting and certainly unexpected vibration-reduction changes is a special torque converter from German supplier LuK equipped with a centrifugal pendulum absorber. This pendulum spreads from the center of the torque converter as engine speed increases and is tuned to absorb the four-cylinder's second-order vibrations, not just those in a narrow frequency band. It does an admirable job, especially considering the engine's biggish, 0.7-liter cylinders, which lead to bigger vibrations. The result is a powertrain that's smoother than GM's (not particularly smooth) corporate V6, which is available in the standard Colorado. It's quieter than a Cruze diesel and even out-softens some gas direct-injection engines on the market. Paradoxically, it may be the most refined of all of the Colorados. No vibration comes through the steering wheel, pedals, floorboards, or even the rearview mirror. But you can tell it's a diesel when you hit the throttle.

Honda, Chevy reveal low-drag speedway aero for Indy 500

As the two automakers currently participating in the IndyCar Series, both Chevy and Honda were invited this year not only to provide engines to the teams on the starting grid, but to develop their own aerodynamics packages as well. Both revealed their designs for the road-course races a few months ago, but with the Indy 500 approaching at break-neck speed, they've now unleashed their aero approaches for speedways. Both are based on the Dallara DW12 chassis introduced to the series a couple of years ago, but sacrifice some of their downforce at the altar of speed. And you can tell as much from looking at them: both Honda (above) and Chevy (below) have streamlined their designs, with single-plane front wings, lower-profile rear wings and fewer winglets on the body and around the wheels in between. The idea is to allow the cars to reach higher top speeds with less drag, while offering the necessary amount of downforce for the banked turns. With the four opening road-course rounds complete, teams using either automaker's equipment will keep the existing aero kits on their cars for the Grand Prix of Indianapolis on the infield course next week, then switch to the speedway package for the Indianapolis 500 later this month. Then it'll be back and forth for the rest of the season as the circus switches between road courses and speedways. Honda Unveils 2015 IndyCar Super Speedway Aero Kit Apr 30, 2015 - SPEEDWAY, Indiana - To be used at the Indianapolis 500 - Manufacturer seeking 11th Indianapolis 500 victory since 2004 - First public running to take place Sunday at Indianapolis Honda today debuted the "Super Speedway" aero kit of aerodynamic upgrades and components its teams will use at this year's 99th running of the Indianapolis 500. The Honda Super Speedway Aero Kit, produced by Honda Performance Development, Honda's racing arm in North America, includes a variety of individual aerodynamic components fitted to the existing Honda-powered Dallara Indy car chassis. All are intended to give Honda's six Indy car teams – encompassing a potential 17 '500' entrants - the ability to maximize performance at the 2.5-mile Indianapolis Motor Speedway oval and other large ovals ( over one mile in length) on the 2015 Verizon IndyCar Series schedule. "We're excited to unveil our Super Speedway aero kit, the newest element in this era of enhanced manufacturer competition in the Verizon IndyCar Series," said Art St. Cyr, president of HPD.

1970 Chevy Camaro gets 650-hp crate engine for SEMA

The latest edition of the Chevrolet Performance catalog arrives at the 2015 SEMA Show, and to demonstrate the insane creations that are possible with it, the company has a seriously powerful machine in tow. This custom 1970 Camaro RS boasts the new LT4 crate engine that makes a staggering 650 horsepower and 650 pound-feet of torque. The offering gives hot rod builders the ability to put the Corvette Z06's 6.2-liter supercharged V8 into any project where they can make the mill fit. This Hyper Blue Metallic Camaro should offer neck-snapping performance with its massively powerful engine and a T-56 Super Magnum six-speed manual gearbox. Chevy's show car is about more than just packing copious horsepower into a classic shape, though. The builders also overhaul the suspension with coilovers at the front and rear, in addition to a four-link setup at the back. Behind the 19-inch aluminum wheels, the coupe has Z06-based brakes at both ends. For better visibility, it wears LED headlights and taillights. Plus, the interior gets custom gauges and a six-point roll cage. With pieces like titanium intake valves and forged aluminum pistons, the LT4 crate engine comes ready to offer serious performance, but Chevy also gives builders a few options to fit their application. The mill is available with either wet- or dry-sump lubrication. Depending on the version, there are kits to fit front-end accessories, air conditioning, and power steering, as well. The new Chevy Performance catalog features other high-performance components like Z06-based parts for the standard Stingray and an array of performance upgrades for the 2016 Camaro, including suspension lowering kits, brake upgrades, and more. We look forward to seeing this vast collection of goodies at SEMA this year. Related Video: Classic 1970 Camaro Shows Supercharged LT4 Heart Contemporized muscle car highlights new Corvette Z06-based crate engine LAS VEGAS – Chevrolet Performance is showing off the new LT4 crate engine in the most attractive way possible – under the hood of a classic 1970 Camaro RS. The concept vehicle was introduced today at the SEMA Show, in Las Vegas. As the supercharged 6.2L heart of the Corvette Z06, the LT4 is rated at 650 horsepower and 650 lb-ft of torque, making it the most powerful production-vehicle engine ever from General Motors. The new crate engine – offered in dry-sump and wet-sump versions – allows builders to use the high-tech performance engine in their hot rod projects.