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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.

Fiat 124 Coupe could join Spider line next year

While Mazda's content to tease coupe lovers with the last-gen MX-5 Power Retractable Hardtop and the upcoming RF, the company is loath to offer a version of its lovable roadster with a permanent hardtop. But Fiat isn't so fickle. According to Autocar, the Italian brand could unveil a proper hardtop Fiata as early as next year. Likely called the 124 Coupe – duh – Autocar reports the addition of a fixed roof will spice up the current Spider. But what kind of spice is more difficult to predict. AC reports that FCA could stay the course, offering the new hardtop with the same powertrain lineup as the Spider – 138 horsepower in the UK and 160 hp (164 hp in Abarth trim) in the US – or drive the 1.4-liter turbocharged four-cylinder higher. As for how the car will look, Autocar points to the handsome 124 Abarth Rally Concept from the 2016 Geneva Motor Show. Don't expect integrated rally lights or a standard yellow-on-red paint scheme, but the new model will likely borrow that concept's roofline – more notchback than the MX-5 RF's fastback-like look. That'd fit with the 124 Coupe's ancestors, which wore a traditional notchback roofline. Fiat offered a 124 hardtop between 1967 and 1975, giving a new hardtop Fiata much more historical precedence than a comparable MX-5. AC reports the new 124 Coupe will likely carry a 10-percent premium across the pond, with a similar increase in the US. But predicting the impact of that price hike is a little bit trickier than multiplying the 124 Spider's price by 1.1, since we don't know what trims the Coupe will come in. The Abarth is likely a shoe-in, starting around $31,000. If, and it's a big if, Fiat sells a 124 Coupe Classica, expect a $27,500 starting price, while a hardtop Lusso would be a smidge over $30,000. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

2015 Mazda3 finally pairs 6-speed manual with larger engine

With all of the hype and anticipation surrounding the 2016 Mazda MX-5 Miata, the Japanese brand was able to sneak another driver-oriented model into its lineup. The company's spec page for the 2015 Mazda3 hatchback and sedan have been updated to list the Skyactiv-G 2.5-liter four-cylinder as finally being available with a six-speed manual transmission, in addition to the previous six-speed automatic. The automaker had promised the row-your-own gearbox with the bigger engine back when it first announced the new Mazda3, but it waited a model year to actually put the combo on sale.
According to Mazda's specs, the manual gearbox trims 40 pounds off of a hatchback or 54 pounds off of a sedan in s Touring and s Grand Touring trims. However, shedding that weight doesn't necessarily boost fuel economy. The six-speed hatch is rated at 26 miles per gallon city and 35 mpg highway, compared to 27/37 for the automatic. The manual sedan is rated at 25/37 city/highway mpg, versus 28/39 with the auto. Buyers can save a little money by opting for the manual, though. Regardless of body style, it's about $1,050 cheaper than the automatic.
Autoblog reached out to Mazda and learned that the 2.5L 6MT models started hitting dealers in August. The 2.5 wasn't initially available with the stick because, "We had to prioritize engineering resources and the 2.5L 6MT was not a high priority combination. Globally, smaller engines are preferred in terms of sales," a Mazda spokesperson explained via email. The automaker also notes that Austrailia will probably be the only other market outside of North America to get the six-speed gearbox with the larger engine.