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Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

Nissan GT-R goes 183 mph on ice in Russia

When a pair of Russian pilots wanted to set a local ice-speed record, they chose a stock Nissan GT-R for the task. Roman Rusinov, a Russian race car driver, and Andrey Leontjev, a Russian auto journalist, took Godzilla to Lake Baikal and ran it up to 294.8 kilometers per hour (182.8 miles per hour) across frozen stuff estimated to be 1.4 meters thick.
While the worldwide record of 205.48 mph was set by Juha Kankkunen in a Bentley Supersports Convertible, the mark achieved by Rusinov and Leontjev establishes a new Russian record. Well done, boys. You can watch it all go down in the video below.

Nissan Zeod RC crash test looks like crushing the tip on a pencil

Nissan has already showed us the 1.5-liter, three-cylinder engine 400 horsepower and 280 pound-feet of torque, augmented by an electric motor, that sits in back of the ZEOD RC headed for the 24 Hours of Le Mans. At the ZEOD RC's other end is a carbon fiber crash structure that has to be tested against an immovable object, and Nissan has seen fit to show us that, too.
You know what to expect if you've seen a crash test before, but the really pointy nose on this car reminds us of a Faber Castell HB pencil being sent to its death. Better yet, it's in slow motion, and you can watch it below.