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DIY fix to lost reverse gear is cheaper than a new transmission

Sometimes in life money gets tight, and the funds just aren't there to make a repair on your vehicle. What proves someone's mettle is how that person deals with it, and this guy deserves a medal for his ingenuity. According to the YouTube description, the man's Nissan Pathfinder lost reverse gear, and this system of chains and rollers has been his fix until he can really get it repaired. Trying this stunt in a crowded parking lot could get a little scary, but for leaving home, this might be all you would need. Also, we have to applaud the father/son bonding on display in this clip. The driver's kid acts as lookout to tell dad when the SUV gets on the rollers. That little boy now has a story to impress his friends for years to come. News Source: hexdude24 via YouTube Auto News Nissan Auto Repair Maintenance SUV Videos viral video nissan pathfinder gearbox reverse

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 heading to Le Mans with 1,250-hp GT-R LM Nismo [w/videos]

Endurance racing faced a pivotal year in 2012. The FIA and the ACO had just come together to form the new World Endurance Championship when Peugeot announced it was shuttering its team, leaving only one manufacturer to contest the top LMP1 class of the nascent series. Fortunately Toyota was able to advance its program to join Audi in the WEC and at the 24 Hours of Le Mans. Two seasons later Porsche joined the fight, and now Nissan has formally announced its return to Le Mans as well. Revealed in Nissan's With Dad spot during the Super Bowl, the Japanese automaker is set to join the grid with the innovative GT-R LM Nismo you see here. It's a hybrid just like the challengers from Audi, Porsche and Toyota, but instead of a mid-engine/rear-drive setup, Nissan's oddball challenger places its engine in the front, driving the front wheels. The 3.0-liter twin-turbocharged V6 is mated to a five-speed sequential gearbox and produces upwards of 550 horsepower on its own, but is mated to an electric Energy Recovery System that kicks in over 700 additional horses for a combined hybrid output exceeding 1,250 hp. That could make Nissan's the most powerful LMP1 on the grid, while still complying with the fuel flow limits outlined in the rulebook that gives participating constructors the latitude to toy with different configurations. Both powertrain components are mounted under the long nose of the oddly styled prototype, behind the canopy of the rearward cockpit that may give it a similar profile to the DeltaWing prototype and subsequent ZEOD RC. But the unconventional GT-R LM Nismo is also innovative in its own way. The front-drive configuration means that the Nissan prototype actually has wider tires up front than in the back, and also allowed for a drastically different approach to aerodynamics. Instead of testing it out at a handful of events in its first season, with the GT-R LM, Nissan will contest the full 2015 FIA World Endurance Championship, starting with the 6 Hours of Silverstone in April and including the 24 Hours of Le Mans in June.