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Mazda rotary engine returning, in an autonomous Toyota delivery vehicle

With the return of the Toyota Supra, the Lotus Esprit and Mazda RX-7 probably share the trophy for hardcore sports cars we'd most like sequels for. The Esprit's too hopeless to consider. Mazda continues to speak in riddles about a new RX-7, but the company has confirmed that the RX-7's heart will return: The company's building a rotary-engined range-extender engine for an autonomous Toyota. At this year's Consumer Electronics Show, Toyota announced its e-Palette autonomous electric delivery vehicle. The e-Palette will come in bus, shuttle, and car versions to service the delivery needs of companies like Amazon, Pizza Hut, and Uber. They'll also be built in custom configurations such as mobile hotel rooms and emergency command centers. Toyota owns 5.25 percent of Mazda, the two automakers recently signed a deal to open a factory in Alabama, and Mazda's known for ace work with small engines. It's not surprising that Toyota chose Mazda for help with the e-Palette, but the rotary aspect is novel. Mazda U.S. president Masahiro Moro said, "This is a very suitable engine to run a generator because it's compact and lightweight, with no noise or vibration, and it has very good fuel economy." There have been rumors of this development previously, as far back as 2016, then again last October in reference to an electric architecture Mazda intended for release in 2019, but Toyota was never mentioned. As to pining for that RX-7 redux, Mazda's head of powertrain said the company's overcome the technical issues of a sports-car-sized rotary engine — the challenge is making a business case for such a sports car. We think the RX-VISION made the case three years ago, and it's already fitted with the Skyactiv-R rotary. Separately, a Toyota spokesman added that the two companies are looking into whether the rotary can be useful beyond the electric car. That's not much to go on when it comes to pining for another RX-7, but hope lives on a scanty diet. Related Video:

Even Ferrari swept up in latest Takata recall expansion

The scope of Takata's deadly airbag problems continues to widen. Eight manufacturers announced recalls Friday that affect more than 12 million vehicles, according to documents filed with federal regulators. The automakers include Honda, which is recalling 4.5 million units, Fiat Chrysler with 4.3 million, Toyota with 1.65 million, and Subaru, which is recalling almost 400,000. Some of these cars include the Saab 9-2x and Pontiac Vibe that Toyota and Subaru made for General Motors. Mazda will recall 730,000 vehicles and Nissan has 400,000 affected units. The smallest numbers were posted by Mitsubishi, with 38,000 Lancers manufactured from 2006 to 2007, and as a noteworthy high-end manufacturer, Ferrari is calling back 2,800 vehicles. These are all US-market cars. Beyond America, the Japanese Transport Ministry has announced seven million additional vehicles will be recalled, which means 19.6 million vehicles across the globe are affected by recalls announced. The defects have been traced to an insufficiently manufactured airbag inflator, which lacks a drying agent that would prevent the inflators from deteriorating over time. Thirteen deaths have been linked to the faulty airbags, which have become unstable and are prone to exploding and showering vehicle occupants with lethal amounts of metal shrapnel. A private equity firm, KKR & Co., has been named in a possible buyout of the struggling Takata. Related Video: News Source: ReutersImage Credit: Shutterstock Government/Legal Recalls Ferrari Honda Mazda Automakers Mitsubishi Nissan Pontiac Subaru Toyota Saab Safety

Confirmed: Mazda Miata gets more power, higher redline, telescoping wheel

Our friend over at Road & Track, Bozi Tatarevic, has a keen nose for stuff just like today's Miata news, and he spotted an article by the Japanese car magazine Car Watch that details Mazda's upcoming updates. Car Watch actually got to drive the car, too. There's a lot to go through, but the highlight has to be confirmation of what we told you earlier this year about a significant power bump: The Miata will indeed get an increase of 26 horsepower, from 155 to 181. But the power's not the whole story. Mazda has increased the redline from 6,800 RPM to 7,500. It's not clear at this point where torque and power peaks are in the rev range, or how these changes affect low-speed drivability, but more revs are almost always a good thing and aren't likely to detract from the roadster's fundamental goodness. Car Watch reports that lighter pistons and connecting rods are fitted to help reduce rotational mass in the 2.0-liter inline-four. Some valvetrain changes were needed to support the higher redline, mainly stiffer valvesprings to prevent valve float. Mazda also changed the shape of the valves and optimized the intake ports to breathe better at higher RPM. The inner diameter of the exhaust ports were increased to flow better through a new muffler better tuned to the engine's new operating range. This confirms and gives a little more detail to what we reported earlier based on a leaked document from Mazda Canada. Car Watch also confirms that the revised Miata will get a low-inertia dual-mass flywheel, which should help absorb some vibration, noise and harshness from the higher-revving engine without losing too much of the directness that a single-mass flywheel provides. Mazda usually gets stuff like this right, so while we won't know until we get a chance to drive it whether the DMF feels "right," we're not too worried about it. There's also a telescopic steering wheel, a first in any Miata, which has a range of about 1.1 inches. That doesn't sound like much, but it should help folks with longer legs reach the wheel without having to crank the seat forward. Interestingly, Car Watch reports that the telescoping wheel was opposed by some in the company seeking to save every fraction of an ounce of weight, and to get it through, the company apparently had to change some of the material in the upper steering column from steel to aluminum to satisfy the weight-conscious. Little details like these are fantastic.