2013 Nissan 370z Base Coupe - Leather - 1-owner - Factory Warranty on 2040-cars

Auto blog

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, Renault break up the Ghosn-style almighty chairmanship

YOKOHAMA, Japan — Japan's Nissan Motor and France's Renault said they would retool the world's top car-making alliance to put themselves on more equal footing, breaking up the all-powerful chairmanship previously wielded by ousted boss Carlos Ghosn. The removal of Ghosn, credited for rescuing Nissan from near-bankruptcy in 1999, had caused much uncertainty about the future of the alliance and some speculation the partnership could even unravel. The companies, together with junior ally Mitsubishi Motors, on Tuesday said the chairman of Renault would serve as the head of the alliance but — in a critical sign of the rebalancing — not as chairman of Nissan. "This is a very special day for the alliance," Renault SA's chairman, Jean-Dominique Senard, told reporters after a meeting at Nissan's Yokohama headquarters. He spoke to reporters along with Renault's chief executive, Thierry Bollore; Nissan CEO Hiroto Saikawa; and Osamu Masuko, CEO of the smaller Japanese alliance partner Mitsubishi Motors Corp. Those four executives will meet every month in Paris or Tokyo and oversee various projects, helping to make the companies' operations more efficient, they said. Nissan has said that Ghosn wielded too much power, creating a lack of oversight and corporate governance. It was not clear who would become Nissan's chairman, vacant since Ghosn was arrested in Japan in November. But the automakers gave no indication of any immediate change in their cross-shareholding agreement, one which has given smaller Renault SA more sway over Nissan. The alliance did not announce any changes in mutual stake holdings. The so-called Restated Alliance Master Agreement that has bound them together so far remains intact, they said. "We are fostering a new start of the alliance. There is nothing to do with the shareholdings and the cross-shareholdings that are still there and still in place," Renault Chairman Senard said. "Our future lies in the efficiency of this alliance," he told reporters at Nissan's headquarters in Yokohama. Senard also said he would not seek to be chairman of Nissan, but instead was a "natural candidate" to be vice-chairman. Former Nissan chairman Ghosn was released on a $9 million bail last week after spending more than 100 days in a Tokyo detention center.

Nissan releases GT-R Nismo N-Attack Package workout video at Fuji

Nissan grabbed headlines last year when it debuted the GT-R Nismo and did a blistering 7:08.679 lap around the Nürburgring's Nordschleife. As it turns out, the GT-R that did that round made use of parts that lowered its weight and improved handling. Nissan calls the extras the N-Attack Package, which stands for Nürburgring Attack, and here is a video showing what its upcoming model can do.
The pack makes a variety of changes to make the Nismo GT-R a better handling car. The suspension and brakes are overhauled with Öhlins adjustable dampers, new stabilizer bar and new front brake pads. As you can see the outside is quite different with carbon fiber components replacing the front fenders and hood gurney, plus an adjustable carbon fiber rear wing with angle adjustments and two height settings. The interior gets a carbon fiber rear bulkhead to cut weight as well.
The release date or price for the N-Attack pack hasn't been revealed, but chief vehicle engineer Noboru Kaneko says that the test in the video at Fuji Speedway was to complete "final checks." So the package might not lag too far behind the standard GT-R Nismo. Scroll down to see the Nissan's pinnacle performance car testing on a cloudy day in Japan and read a brief press release about it.