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2016 Nissan Titan endures more torture testing

The burly, next-gen 2016 Nissan Titan XD made its big debut at the 2015 Detroit Auto Show and promised to launch later in the year with multiple bed lengths, several cab configurations and the choice of a Cummins 5.0-liter diesel V8 pumping out 310 horsepower and 555 pound-feet of torque. While we wait for the truck to arrive at dealerships, the brand is continuing to tell the pickup's development story through the Titan Truckumentary series of shorts videos. Nissan has already used the clips to look back at its pickup history, but the latest entry puts the focus directly on the new Titan, specifically, its torture testing during development. One trial bounced the truck around for months on a durability machine to simulate 370,000 miles of rough driving. Although, the true fun comes from watching the real-life evaluations where engineers slam the model into curbs and drive it off ledges to see what it can take.

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 Qashai gets the Juke R treatment

It would appear that we're a little behind the times on this one, but a UK-based tuner of the Nissan GT-R is creating its own take on the lustworthy Juke-R starting with the Nissan Qashqai crossover. Severnvalley Motorsport claims to be the leading authority for tuning of the current GT-R in Europe. The outfit is now turning its attention to stuffing the drivetrain of a GT-R under the body of a Qashqai+2 - a seven-passenger compact crossover similar in size to our Nissan Rogue - resulting in the Qashqai-R.
The project started back in March when Severnvalley took delivery of a new Qashqai. After stripping the crossover down to its bare essentials and building a custom jig to support the body shell, it was then transferred onto an awaiting GT-R chassis. The crew aimed to keep Qashqai's appearance as stock as possible, but fender extensions and hood vents were required to accommodate the sports car underpinnings.
The white Qashqai-R seen above will be tuned to produce 900 horsepower, while a black version will get bumped up to 1,000 hp. And, looking at the build photos, we surmise that this project will take nothing less than a herculean feat of supercar determination before it's through.