1996 R33 Nissan Skyline Gtr Lm Limited Vspec - 1 Of 98 Made - 1 Of 14 Vspecs 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.

Nissan recalling 13k Versa Note hatchbacks

Nissan is recalling 13,000 of its new 2014 Versa Note hatchbacks due to an issue with various bolts used to assemble the vehicle. Considering the Versa Note was only recently put on sale, this news must be driving Nissan nuts (we couldn't resist), but presumably the lion's share of these vehicles are still at dealerships.
According to a report from The Detroit News, there are two separate issues. The first has to do with the latches for the rear seats, which include bolts that may not be strong enough to keep the seats upright in the event of a crash. The second relates to the bolts that attach the body to the undercarriage. Apparently they may not have been tightened properly, and in rare cases may be missing altogether. No injuries or accidents have been reported from either issue.
Owners are being told to report to dealers for the fixes, with notifications coming in mid-August.

2014 Nissan 370Z pricing announced, MSRP reduced by $3,000

Nissan is up to something. The company announced pricing for the 2014 Nissan 370Z, 370Z Nismo, and 370Z Roadster, which isn't out of the ordinary. What is, is that the standard, hardtop 370Z has received a $3,130 reduction in price for 2014. The upmarket Touring model, meanwhile, has been dropped $2,550.
That means, excluding the $790 for destination and handling, a base, six-speed manual 370Z is only $29,990. That is an excellent deal. Adding an automatic will bump the price to $31,290, while the Touring model starts at $35,270 for DIY shifters and $36,570 for autos. The top-of-the-range Nismo runs $43,020. The Roadster, meanwhile, starts at $41,470.
So what does this mean in the grand scheme? Automakers don't just slash $3,000 off the price of a desirable sportscar because they're feeling generous.Could this be a move to clear out stock before a replacement to the current Z arrives?