2007 Infiniti G35x (like-new, Low Mileage, Dealer-serviced, Prem/nav/tech Pkgs) on 2040-cars

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Final Recap: Days 2 and 3 notes, quotes, and takeaways from the US Grand Prix

The Texas grass no longer rustles with 2.4-liter V8 exhaust blown at 18,000 revs, the Texas dust is no longer raised by hard-compound Pirellis. We saw a lot and learned a lot while we were there as guests of Infiniti, and after our Day 1 and race recaps, here are the bits left over from our time spent with the carmaker and Red Bull Racing, including thoughts on a "wicked" race, Christian Horner's quest for a more level playing field, Infiniti "going longer and deeper," and why Mario Andretti should get a police escort at the beginning of a race but not a microphone at the end...

Nissan's dismal 2019: Where does Japan's struggling brand go from here?

Auto sales have gradually slowed from their peak during the boom years that followed the global recession, but Nissan's rapid decline stood out even in a year when few high-volume manufacturers had much to be excited about.  Of the "Japanese 3," Nissan's 2019 performance was by far the most troubling. Through November, when the company last posted its global sales figures, its volumes were down 8 percent compared to 2019. Here in the United States, its full-year numbers were down 9.9% in an industry that slid just a hair more than 2 percent overall.  Meanwhile, Honda managed a slight increase in U.S. sales (0.2%) and Toyota, much like the industry in general, finished the year down approximately 2%. Like Nissan, Honda and Toyota have remained committed to cars — including compact and midsize sedans — and have a comprehensive portfolio of offerings in the key SUV and crossover segments.   On paper, Nissan's lineup checks all the right boxes. From the subcompact Kicks up to the Armada, it has something for sale in virtually every possible nook and cranny of the people-mover segment, but almost all of these trucks (and trucklets) took a beating in 2019. Only the baby Kicks managed to improve on its 2018 sales, which isn't saying a whole lot, considering it was barely sold in 2018 to begin with.  In fact, the bonus volume contributed by Kicks helps obscure just how poorly some of Nissan's key offerings performed last year. Combined Rogue and Rogue Sport sales slid 15%; Murano was down more than 18%; the Pathfinder and Armada managed to pace the general industry, dropping 2.8 and 1.9%, respectively, but the astute reader will note at this point that we've yet to single out any bright spots. The news was even worse on the truck side. Frontier was down 9.1%. Titan? Down 37.5%. Crossovers and SUVs are selling. Trucks, even from import brands, are also selling. Toyota's mid-size Tacoma was up in 2019; both it and the full-size Tundra still more than tripled the volume of their Nissan competitors. Further muddying the waters, Honda managed its year-over-year volume increase without selling a full-sized pickup at all.  What, then, is Nissan's problem? To borrow an oft-used phrase, "It's the product, stupid." The most striking evidence of this issue is the Rogue, which competes in the compact crossover segment — a collection of vehicles that essentially sell themselves.

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.