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How Mazda got Skyactiv-X to work is incredible

"Take everything you know about engines and turn it around," Mazda North America Vehicle Development Engineer Dave Coleman says, patiently and with a look of benevolent pity, as he's quizzed about the particulars of the company's new engine. The Skyactiv-X engine is enigmatic — and deceptively simple in operation. And the bottom line for American consumers is that they'll be able to buy a car (or crossover; we don't know yet what vehicle will first get it) by late 2019 that provides diesel-like fuel economy but runs on regular old gasoline. In between diesel and spark ignition, but it's neither To truly understand it, you have to dive into the contradictions. Take that regular old gasoline: Contrary to common sense, the lower the octane, the better it works. In the lab, the Skyactiv-X engine loves 80 octane. The lowest Americans get is 87, so the engine is tuned for that octane. Go higher and you lose some low-end torque. Coleman was right. It's hard to wrap your head around an engine that thrives just at the point when most gas engines would aggressively self-destruct. It uses a supercharger to pump additional air — but not additional fuel. It uses spark plugs to start a combustion cycle that normally doesn't need a spark. And, quixotically, it's not displacing Mazda's own American-market diesel engine, currently languishing in a seemingly endless hell of regulatory approval. More bizarre: Mazda is a tiny automaker facing real existential headwinds, and gasoline compression ignition is a massive challenge. GM and Hyundai announced compression ignition, or HCCI, projects (full name, homogeneous charge compression ignition) to great fanfare, but they never amounted to a production hill of beans, crippled by reliability issues or horrible vibrations. Worse, they only worked at an unusably narrow range — low RPMs and low loads. HCCI research improved direct-injection gas and diesel engine technologies for these companies, but HCCI itself remains untamed. The benefits of lean combustion Why even try to tame HCCI? The answer is much better fuel economy and lower emissions. Less burned carbon-based fuel, less carbon dioxide released. That's simple. But there are some thermodynamic reasons for the lean combustion you can achieve with compression ignition that are worth explaining. The ideal amount of fuel for a conventional engine to burn is about a 14:1 air-to-fuel ratio. That lets every molecule burn nicely, in theory.

Perk up your Mazda Miata with BBR's new 248-horsepower turbo kit

For three decades, enthusiasts have argued whether the Mazda MX-5 Miata needs more power. For its part, Mazda seems fine with leaving the Miata as is, even reducing the horsepower from the third- to fourth-generation models, though the car lost a little weight. That's where tuners like BBR in the UK and Flyin' Miata here in the US step in, offering aftermarket solutions for those that crave a little more grunt. BBR announced today that its new 248-horsepower Stage 1 turbo kit is ready and waiting for the new 2.0-liter-powered ND Miatas, including the new Miata RF. BBR's first Miata turbo kit was released all the way back in 1990. Since then, the shop has been tuning and honing its craft, releasing ever-more potent variations its comprehensive power kit. This new version, like the previous ones, focuses not only on adding more power but maintaining the level of drivability and refinement you expect from all Miatas. The Mazda electronic safety features are retained, and the team is working on CARB emissions approval. That said, with BBR tune an ND Miata will hit 60 mph in just 5.0 seconds, roughly two seconds quicker than stock. To get the peak 248 horsepower and 236 lb-ft of torque, BBR does more than simply slap on a big turbo. In 2014, BBR began using a Mazda3 as a development vehicle in preparation for the new Miata's launch. A twin-scroll turbocharger is mounted onto a custom cast-iron manifold. A front-mounted aluminum intercooler keep things cool and doesn't require cutting up the bodywork. The engine breathes in through a K&N air filter and exhales through a stainless steel downpipe. The whole thing is controlled by BBR's Starchip / EcuTek RaceRom ECU software package. Other upgrades include silicone turbo pipes, an aluminum battery tray, a recirculating piston type dump valve, a carbon-fiber heat shield, and stainless steel oil and water lines. BBR is offering extended warranties from 12 to 36 months. In the US, the sole distributor is Flyin' Miata in Colorado. At $5,695, it's not a cheap proposition, but it is less expensive than one of Flyin' Miata's V8 swap kits. Less expensive (and less potent) performance kits are also available. Related Video: News Source: BBR Aftermarket Mazda Convertible Performance turbo tuner tuning

World Car Awards finalists snub American-branded vehicles — except for Bronco

The list of World Car Awards has been whittled down to 10 finalists, but only one American brand — Ford — appears among the remaining nine carmakers for this yearÂ’s top award. The Bronco is there, and it also is balloted as a finalist in the design category. The other categories are performance car, urban car, electric vehicle and luxury model. Each category has five finalists except World Car, which has 10. One brand conspicuous by its absence in any category: Tesla. The winner in each is scheduled to be crowned March 27 at the New York International Auto Show in Manhattan. This year marks the 20th year of the World Car Awards and the partnership with the New York show. The selection process involves 100-plus automotive journalists from 29 countries who vote, as they review and test-drive the eligible vehicles for the 2024 awards. Their journey is captured virtually on World Car TV. If youÂ’re counting, the brands that appear most on the six finals lists are Mercedes-Benz (four times), BMW (also four), Hyundai (three), and Volvo (three). HereÂ’s the full listing. A video clip showing all of them is here: World Car -BYD Seal / Atto 4 -Ford Bronco -Hyundai Kona / Kona Electric -Hyundai Santa Fe -Kia EV9 -Mazda CX-90 -Subaru Crosstrek -Toyota Prius -Volkswagen ID.7 -Volvo EX30 World Car Design of the Year Ford Bronco Ferrari Purosangue Toyota Prius Volvo EX30 Zeekr X 2024 World Electric Vehicle BMW i5 Kia EV9 Mercedes-Benz EQE SUV Volkswagen ID.7 Volvo EX30 2024 World Luxury Car - BMW 5 Series / i5 - Lexus LM - Mercedes-Benz CLE - Mercedes-Benz E-Class - Mercedes-Benz EQE SUV 2024 World Urban Car  - Abarth 500e - BYD Dolphin - Lexus LBX - Suzuki Fronx - Volvo EX30 2024 World Performance Car - BMW M2 - BMW XM - Ferrari Purosangue - Hyundai Ioniq 5 N - Porsche Cayenne Turbo E-Hybrid