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Mazda files patents for a sequential twin-turbo setup

Mazda has a history of interesting engine technologies, from yesterday's rotary engine to tomorrow's compression ignition engine, and new patents show it still may have some internal combustion tricks up its sleeve. The one on display in these patents isn't especially new in concept, though. A sequential twin-turbocharger setup is something Mazda itself used on the third-generation RX-7. But it's something we haven't seen much of lately. It looks like it could have some possible advantages over older sequential systems, and it has some potential advantages for enthusiasts. First a quick and dirty primer for what makes a sequential twin-turbo system distinct from other twin-turbo systems. In many twin-turbo engines, there are simply two turbos that work together as one bigger turbo. They're the same size, and they spool up at the same time. With a sequential setup, at low rpm, a smaller turbocharger is spooled up first at low-rpm for quicker throttle response, and as the rpm and exhaust pressure increases, a valve opens up that allows a larger turbocharger to also spool up and provide high-rpm boost. That's basically how the Mazda design shown above functions. A big flap blocks off the larger turbocharger exhaust inlet, channeling all the exhaust to the smaller turbo. When more exhaust is available at high rpm, it looks like that flap opens up to spool up the big turbo, too. What's interesting here is that the way the turbochargers are packaged takes up less space than past systems. It looks like both turbos are contained in one unit that shares the same exhaust outlet, meaning the exhaust manifold could be kept simple and compact. In fact, the piping for compressed intake air could also be shared, reducing the amount of piping, which would further decrease the amount of materials and possible failure points. There are a number advantages of making this system smaller. The potential applications of the system are much greater, since it could fit in smaller cars with smaller engine bays. Making the system smaller also means that there won't be as much weight, which is important from both fuel economy and performance standpoints. Finally, the smaller setup likely uses fewer materials, which could make the system cheaper and thus easier to offer on a wider range of vehicles, or at least more profitable for Mazda.

Most reliable cars and trucks of 2022

Related: Least reliable cars and trucks of 2022   For years now, Consumer Reports has been one of the most prolific sources of vehicle reliability data around. The organization tests a number of vehicles each year and surveys its members on various automotive topics, including reliability. The results of its 2022 annual auto survey are in, and the list of most reliable vehicles has been revealed. Unsurprisingly, Toyota and Lexus dominated the list of most reliable vehicles, but BMW and Mini snuck into the top 10 as well. The list includes: Toyota Corolla Hybrid: 93 Lexus GX: 91 Mini Cooper: 89 Toyota Prius: 89 Mazda MX-5 Miata: 85 Lincoln Corsair: 82 Toyota Corolla: 81 Subaru Crosstrek: 80 BMW 3 Series: 80 Toyota Prius Prime: 77 In terms of the most reliable vehicle type, Consumer Reports says that sedans remain the best choice. Their average score is 58, which is notably better than SUVs’ average score of 51. Minivans and pickup trucks are lower, at 44 and 39, respectively. As Consumer Reports notes, many sedans are older models that have allowed their manufacturers to iron out the wrinkles, making them more reliable. Domestic automakers' SUVs and trucks performed better in the survey than their imported counterparts, with scores of 45 and 41, respectively. The study also showed that hybrids and plug-in hybrids are becoming more reliable, and have climbed the score ladder to the tops of their segments in many cases.  Consumer Reports says its study includes 17 trouble areas, including small stuff like creaks and rattles and much larger problems like drivetrain failures. The organization states that it weights each issue based on its severity to create its predicted reliability scores, with 100 being the best. A car must be in production for at least two model years to be considered for the list. Related video: Green BMW Lexus Lincoln Mazda MINI Subaru Toyota Car Buying Maintenance Ownership Convertible Coupe Crossover Hatchback SUV Hybrid Sedan Consumer Reports reliability

Electric Miata smokes Tesla Model S at the track

Yes, folks, you read that headline right. A souped up battery-electric version of a Mazda Miata took down a Tesla Model S on a quarter-mile drag strip. And it wasn't even close. Road Test TV was kind enough to post a video of a forest-green Miata (and its very stoked driver) doing a quarter-mile run in a rather brisk 9.27 seconds, beating the Model S sedan by a whopping 3.5 seconds in the process. And the Mazda crossed the finish line moving at 142 miles per hour, or 40 miles per hour faster than the Tesla was going when it finished the race. It's a good thing for the Tesla owner that they weren't racing for pink slips. Granted, the comparison is probably an unfair one because the Tesla was a stock, production vehicle (the P85 Performance model, but still), whereas who knows how the Miata was juiced up and how much cash it took to do the job. It's sort of like putting, say, an automotive writer against Usain Bolt because we ate the same breakfast and share 99 percent of our DNA. Still, the video does lend a certain credence to the idea that a battery-electric, super-light, rear-wheel-drive Miata would be a lot of fun, or at least a heck of lot more fun than any other Mazda out there. We're just sayin'. Check out the 100-second video below, and remember not to blink. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.