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2015 Nissan GT-R Nismo to pack 595 hp, lap N"urburgring in 7:08

With two major auto shows taking place this week on different sides of the globe, the amount of news being posted across the internet is reaching a fever pitch. Naturally, things happen, trigger fingers get itchy and stories get leaked, which is apparently how we came across this spate of premature pictures and information on the eagerly anticipated Nissan GT-R Nismo.
Packing 595 horsepower and 480 pound-feet of torque from its twin-turbocharged, 3.8-liter V6, the Nismo-fied GT-R should be a serious kick in the pants when run hard. The new power is thanks to a number of donor parts from the GT-R Nismo GT3 racecar, bits that include larger turbochargers, revised intake and exhaust systems and new ignition timing.
Thanks to the engine enhancements, and, we imagine, a few other tweaks to the chassis, brakes and aerodynamics that have yet to be published, the GT-R Nismo is said to blitz the Nürburgring in just 7:08, a mere 11 seconds slower than the $845,000 Porsche 918 Spyder. For a car that is rumored to cost well under a quarter of the price, that performance is just immense.

Nissan Leaf resale value expected to take a hit

Nissan Leaf resale values may take a tumble, according to Kelley Blue Book. The vehicle evaluation resource said the 2013 Nissan Leaf will retain around 35 percent of its MSRP after three years; that's down five percent from what KBB gave the 2012 Leaf at the end of 2011. Automotive News reports KBB adjusted the EV's residual value prediction because the used transaction prices for the 2011 model have stuck around 35 percent for the past few months due to relatively cheap gasoline, not to mention the fact that Nissan trimmed the electric's MSRP from $36,050 to $29,650 before the $7,500 tax credit.
Since used buyers are often motivated by more practical buying concerns than early adopters or those wanting to curb their carbon emissions, they may not be willing to pay more for an EV. Meanwhile, early Leaf models are now coming to auction, abandoned by rental car companies after customers shunned them in favor of traditional internal-combustion vehicles. Many of those at auction have less than 10,000 miles and carry an average transaction price of just $13,700.

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.