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Mazda6 GX Grand-Am racer goes where no diesel sedan has gone before

There has never been a four-door diesel sedan in the Grand-Am series, until now: The blunt, bewinged grille of the Mazda6 GX has blown right through that wall. It's said that racing improves the breed, but usually the breed has gone on sale when the racing begins. One of the unusual aspects of the Mazda6 GX, on the other hand, is that while the diesel won't go on sale to the public until later this year, it will already have tasted racing blood by the end of the day. That kind of reversal is more likely found with super coupes like the Lexus LFA and Honda NSX.
Mazda has taken class wins at Daytona's 24-hour race a whopping 23 times since 1975, most recently in 2010 with the RX-8 in the GT class. This year the Hiroshima company decided to show off its SkyActiv technology, then turned things up to eleven by opting for its SkyActiv-D instead of the more conventional SkyActiv-G gas engine to run in the new GX class. It will be joined by competitors like the Lotus Evora and Porsche Cayman in the class, nevertheless, at 2.4 liters, it's the smallest engine on the grid.
Time has not been a friend, either - Mazda said that the first five SkyActiv-D engines off the production line went to Speed Source in Coral Springs, Florida, the company that preps Mazda's race vehicles. Still, race driver Jonathan Baumarito on the #70 car said that although the engine's been on the dyno since February of last year, it's only been in the car for about a month and there have been only a couple of test days.

Mazda considering a 'hyper' Mazda3 with the 250-hp 2.5-liter turbo four

Mazda boss Akira Marumoto said last year there'd be no Mazdaspeed version of the new Mazda3 because the hot hatch segment wasn't a priority for the carmaker. Then Mazda engineer Dave Coleman told Road & Track that without "an engine on the shelf that would fit properly," an MPS variant made no sense. The first reader comment on our Coleman post read, "Engine — you have it; cue up the 2.5T." Mazda might have been listening. Program manager Kota Beppu told Autocar he'd like a "hyper" Mazda3, the outlet figuring the 2.5-liter four-cylinder turbo would make the most sense for power. Autocar wrote "the project had not been officially signed off, [but] insiders suggest that is a formality." When Car and Driver queried Mazda and its sources about the report, the magazine realized "the company is seriously considering a high-performance hot hatch." What's more, "Drew Cary, senior manager for brand communications, said, 'We encourage people to ask for it, though. Our planners and executives are watching and listening to fans.'" The turbocharged 2.5-liter SkyActiv-G four-cylinder — which doesn't sell in Europe — makes 250 hp on premium gasoline and 310 pound-feet of torque in the Mazda6, CX-5 and CX-9. A next-generation SkyActiv-G is predicted on the way next year, bringing more boost and power. Even as is, we're talking a chunky lump of power to send to the front wheels, and Beppu mentioned torque steer. The new Mazda3's all-wheel drive would alleviate that bugbear. Unlike the raw, fast-twitch reflexes of the last Mazdaspeed3 from 2013, Beppu says a new model "needs to be responsible and friendly ... more friendly than a Golf GTI." And, "It should be fast." The polished looks and interior address the necessary perceptions. CD's done the math on the current 2.5-liter and predicts a five-second sprint to 60 miles per hour, which is Volkswagen Golf R and Honda Civic Type R territory, so GTI comparisons could be a case of aiming low. Imagine a 300-hp engine with a touch more torque and a six-speed manual ... If Mazda follows through with such a product, it could take two years to get the green light. However, we're told that Mazda's Los Angeles research and development center has already built a proof-of-concept to encourage and anticipate that green light.

Mazda G-Vectoring Control makes driving better without you knowing

Mazda has just spent eight years developing a new technology that will make its new cars a lot more fun to drive, even if you have absolutely no idea that it's working. And subtlety's the point, Mazda engineers told us at a press event at Mazda Raceway Laguna Seca. In fact, the effects of what they've dubbed G-Vectoring Control are so fine that the marketing and PR teams are at a loss for how to do their jobs with it. "The engineers have done their work," said Mazda Director of Communications Jeremy Barnes, "But how do we get the message across?" The basic premise is this: G-Vectoring activates only when the car's on-board computer reads simultaneous steering and throttle input. The data — including throttle position, steering angle, and, crucially, how quickly you're adjusting the steering angle — are then funneled through an algorithm to reduce engine torque, which transfers vehicle weight, adding more grip to the wheels that need it. The system will appear first on 2017 Mazda6 sedans arriving in showrooms later this year, followed by the 2017 Mazda3. Actually, "subtle" does not even begin to describe the effect. G-Vectoring Control can detect as much as one tenth of one degree of steering angle, and changes the cornering forces only 0.1 to 0.5 g as a result. "That's less than the human body can feel," explained Vehicle Development Engineer Dave Coleman. In practice, G-Vectoring reduces the steering angle at turn-in, as well as the rate at which one turns the wheel. To demonstrate, Director of R&D Kelvin Hiraishi rode shotgun with us in a specially equipped Mazda6 that allowed him to turn G-Vectoring on or off at the push of a button (production cars will always have it on). Hiraishi had us drive a number of courses, including Mazda Raceway Laguna Seca itself, while an engineer measured our steering inputs with a laptop Matrix'd into the car's electronic brain. I drove the same course several times with the same car in the same conditions, with cruise control locked and the system turned on or off. Lo and behold, with G-Vectoring activated, the engineer's output graph showed that my steering inputs were indeed reduced ever so slightly. There were two times that G-Vectoring was markedly noticeable. The first on a turn with a minor banking toward the outside, and the second was during cornering over an artificially wet section of the course — in other words, when the car was at the limits of adhesion.