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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.

Watch these Nissan 350Zs set a record for world's longest twin drift

In July, Harald Muller notched a Guinness World Record by drifting longer than any lone tire-burner ever had: 89.55 miles. This month, Nissan Middle East broke the Guinness World Record for the longest twin drift when two drivers slithered through a figure eight for 17.7 miles. The feat came about to commemorate the opening of the Nissan 370Z Drift Experience in Dubai, which will teach eager punters how to abuse slip angle, but the actual drifting was done with two 350Zs. Nissan opened the center in partnership with ProDrift Academy, a European school for wannabe drifters, and when it comes time for actual instruction that will be done in the eponymous 370Z. You can check out a video snippet from the event and a press release from Nissan Middle East below. Nissan Middle East sets a new Guinness World Records title for the "Longest Twin Vehicle Drifting" Record set during the "Nissan 370Z Drift Experience" launch event DUBAI, United Arab Emirates, Dec. 15, 2014 – Nissan Middle East today has set a new Guinness World Records title for the longest twin vehicle drifting. Two Nissan Z cars drifted around a track at the same time without stopping for 28.52 kilometers. The record was set in the second attempt during the launch of the "Nissan 370Z Drift Experience" which will offer anyone the opportunity to learn and perfect the art of drifting. Speaking at the event, Samir Cherfan, Managing Director, Nissan Middle East, said: "With today's accomplishment of setting a new Guinness World Records title, we have proven again the strength of our vehicles by adding another Guinness World Records record to our list. The Nissan Z is a very popular car in the drifting scene, and this new record is yet another proof on the ability of this car to make drifting look so easy." "Nissan 370Z Drift Experience" is a partnership between Nissan Middle East and the Prodrift Academy, which is carried out using Nissan 370Zs alongside the Prodrift Academy's professional drift instructors in a safe and controlled environment. "Nissan has a strong focus on motorsports in the Middle East. Since safety is our priority at Nissan, we have partnered with the Prodrift Academy to provide a legal and safe platform for drifting fanatics in the region," Cherfan added. Nissan Motorsports History For nearly 80 years, Nissan has been pushing the boundaries of innovation within the Motorsports industry.

Nissan's crowdsourced Project Titan is ready to tackle Alaska [w/videos]

Alaska still offers Americans the chance to really experience the wilderness, and Nissan is challenging its Titan pickup to its offroad extremes with a little help from its fans. After crowdsourcing a heap of mods, the company is handing it over to two Wounded Warrior Project Alumni to do their worst in the backcountry to see what the truck can do.
Nissan last experimented with the crowdsourcing idea on its Project 370Z in 2012 but might have taken things even further this time. For Project Titan, the automaker let fans vote on 10 different areas to customize on a 2014 Titan Crew Cab PRO-4X. To fit the rugged look, the company covered it up with a custom digital-camouflage wrap with a Wounded Warrior Project emblem and even outfitted its all-terrain camping trailer in a similar scheme. An LED lighting rig was also added to the new bull bar and roof rack to brighten the night. For a just little more grunt, the 5.6-liter V8 was outfitted with a Nismo cold-air intake and Borla cat-back exhaust, and to keep from getting stuck, the pickup got an upgraded suspension with more travel and 18-inch wheels with 35-inch Nitto offroad tires. The interior was also slightly revised with big GPS system and custom embroidered seats.
Now, it's time to see if the truck's mods can handle what the Alaskan wilderness can throw at it. The two Wounded Warrior Project Alumni are just starting their expedition and are expecting snow on the way. Scroll down to watch three build videos for the Titan and read Nissan's official announcement. You can also follow their journey on Nissan Trucks' Facebook page.