2001 Nissan Frontier Xe Ext Cab Pickup 2-door V6. 4wd. Ex Cond. Low Res 1 Owner on 2040-cars

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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 some vintage F1 cars blast up a Japanese mountain road

It's a rare treat to see classic Formula One cars racing anywhere, but watching them on a Japanese mountain road is absolutely sublime. The folks behind Motorhead from Japan took over the toll road's twisting stretch of tarmac to turn this impossible dream into a reality. The unusual opportunity of a closed mountain road would be a waste for only two vehicles, and there were plenty of drivers in amazing machines that wanted to blast up the hill. After the vintage F1 cars got their turn, some drifters in a Nissan GT-R and a Toyota GT86 added some tire smoke to the misty mountain air. A couple more GT-R racecars and some modern sports cars eventually joined them. Before the rain hit, this team had quite a party going on. This video features amazing camera work, but the music unfortunately drowns out the chance to hear these amazing racecars. If watching this leaves you wanting more, Motorhead released a video last year of another group of impressive performance vehicles on the mountain road.

2013 Nissan Juke Nismo

Scratching All The Right Itches
Say what you will about the unconventional aesthetics that Nissan employed on the company's Juke. I love the thing. The universe has no shortage of ambiguously styled CUVs, and while I can't exactly say I would have turned to the amphibian world for design inspiration had it been me with the charcoal in my hand, I can certainly appreciate the fact that the Juke isn't just another box-on-box design.
And then there's that engine. The turbocharged 1.6-liter four-cylinder under the hood is one of the best powerplants in the company's toy box, offering plenty of low-range torque and comical levels of thrust. Hell, it even makes the optional continuously variable transmission tolerable. Praise be to the deities of forced induction. But something has always been missing from the mix. From the first moment I got my hands on the Juke, I couldn't help but think how much better the machine would be if Nissan ditched an inch or two of ground clearance and sharpened up its suspension. Think more "hot hatch" and less "Kermit goes to Kroger."