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What a 181-horsepower 2019 Mazda MX-5 Miata means for us, and you

Last month, we reported on a VIN filing dug up by Road & Track that showed that the 2019 Mazda MX-5 Miata's 2.0-liter Skyactiv-G engine would get a power bump, from 155 to 181 net horsepower. As for how the 2019 Miata would make that extra power, we heard rumors it'd utilize a new cylinder head allowing higher revs, accounting for that extra power. Now we have what appears to be a leaked document from Mazda Canada showing exactly where that extra power comes from. According to the document posted at Miata.net (registration required to see the image), Mazda will alter camshaft lift and valve size on both the intake and exhaust side, fit freer-flowing exhaust, and smooth and enlarge the piping on the air intake side. There are also internal engine modifications: lighter pistons with lower crowns for better swirl in the combustion chamber, lighter connecting rods, and a crankshaft balanced for higher-RPM operation. All those extra revs mean extra vibration and noise, so Mazda will ditch the single-mass flywheel for a "low-inertia" dual-mass flywheel – which will attempt to find a nice balance between DMF damping action and SMF directness. Overall, it's a pretty serious engine revision with some driveline changes that will heavily affect the driving characteristics of a fantastic driver's car. Contributing Editor James Riswick and Senior Editor Alex Kierstein, both well versed in Miatas past and present, are here to analyze what this could mean for the little roadster. James Riswick: I don't know much about them lighter crank combustion rods, but I for one welcome the news of more power to the Miata. The jump from 155 to 181 seems like a very prudent Mazda-like thing to do, accomplishing that task through various aforementioned technical wizardry as opposed to slapping on a turbocharger, exclaiming "yee-hah" and calling it a day. Alex Kierstein: That's true. I'm wary of additional power, but you do make a good point that at least this is the right way to do it. Going all-motor will keep the bright responsiveness of the engine intact. But higher revs might make power delivery peakier. Frankly, I'd be ok with moving the torque and horsepower peaks up a bit in the rev range, making it a bit more work to access the engine's sweet spot. The dual-mass flywheel should also help if low-end torque suffers, so less stalling in traffic. JR: Did wonders in the 911 and 718s.

Mazda CX-9 Luggage Test | How much fits behind the third row?

We recently tested the luggage-carrying capability of one of the most spacious three-row crossovers, the Hyundai Palisade, and now it's time for one of the smallest. The Mazda CX-9 may look terrific and drive even better, but that zest comes at the expense of cargo capacity, as we're about to see. The big culprit is that rakish liftgate, which not only robs the CX-9 of luggage space, but third-row headroom as well. It's pretty dungeon-like back there despite competitive legroom, and there aren't any air vents or USB ports, either. But this is about cargo capacity, so let's see how much luggage will fit inside. According to the specs, the CX-9 has 38.2 cubic-feet with the third-row lowered. That's far less than the Palisade's 45.8 and Honda Pilot's 46.8. It's actually even less than the five-passenger Honda Passport (50.5).  The test car came with a $100 cargo mat, which is velcroed to the seats and folds OK with it, but the carpet also takes up some extra space ... and the CX-9 needs as much as it can get.  To raise the seats, lean inside and pull up/back on those two handles. There is 14.4 cubic-feet of space behind the raised third row. On paper, that is indeed one of the smaller amounts in the segment, but in practice, it seems even smaller.  You can free up space by removing the rigid floor panel. If you need to carry multiple pieces of luggage, it's almost a necessity.  OK, so I have two midsize roller suitcases, both of which would need to be checked. Then there's two larger carry-on roll-aboards and one smaller one. As a bonus, there's my wife's quasi-fancy weekend bag. It was a struggle to fit three of them aboard, and Tetrised together two formations. The first uses all three carry-on bags with the cargo floor removed. And no, the fancy bag won't fit atop the blue one because it'll run into the liftgate window. A smaller tote would definitely fit, however.  This is how I could fit one of the bigger check-in bags. The liftgate just barely closed. Again, you could fit a small tote atop the blue bag, plus some other items in the lower outboard regions.  OK, so how could you fit everything aboard? Lowering half of the 50/50-split third row is a must, obviously. Both big check-in bags then stack atop each other, and then stack the other four atop each other with the cargo floor in place.

Mazda files patent applications for inline-six technology, new transmission

We've known for some time that Mazda is one of the OEMs getting back on the inline-six engine bandwagon, and a report from Japan gives us a glimpse of some of the automaker's plans. Mazda has filed patent applications for both new exhaust components (depicted with an inline-six) and a new eight-speed automatic transmission.  The news comes from a blog called T's Media (fire up Google Translate), which located the new hardware in two separate fillings, one for exhaust system components and one for the new transmission.  Mazda's lineup has been exclusively powered by four-cylinder engines since the demise of the last-generation CX-9, which utilized a 3.7-liter V6 sourced from Ford. Since, Mazda has relied on turbocharging to get more power out of its SkyActiv four-pots, but changes may be coming. Prior reports have indicated that Mazda wants a new, larger engine architecture to power vehicles built on a new, larger platform. This new chassis is expected to accommodate longitudinal, rear-wheel drive powertrains, which could spawn larger crossovers and SUVs. It could also potentially underpin a new rear-wheel drive coupe, if Mazda decides to go that route.  While the inline engine itself is not news, what we're seeing here might actually be hints as to Mazda's approach to the next generation of its SkyActiv engine architecture. Mazda's exhaust patent seems to describe a scalable — perhaps even modular — setup intended to be used with inline and potentially even V-engines.  "Provided is an engine exhaust structure capable of securing exhaust efficiency while reducing the size of the engine by changing the structure of an exhaust port," a translation of the patent application's introduction says. "[T]here has been proposed a technique for collecting exhaust gas discharged from each cylinder inside a cylinder head without using a separate exhaust manifold with the aim of downsizing the engine." In other words, Mazda is looking for ways to make its future engines more compact, and the strategy detailed here is the use of an integrated exhaust manifold, similar to what other automakers (such as Honda and Ford) have utilized on their smaller-displacement turbocharged engines. The sketch above of an inline-six engine with just two exhaust ports illustrates this concept.  The eight-speed transmission, while noteworthy in its own right as Mazda currently relies on aging six-speeds, doesn't seem to offer us anything particularly game-changing.  Related Video: