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BMW M4 Convertible poised for Goodwood unveil

It shouldn't be a shock that BMW is working on a convertible version of the M4. Not only have we caught it testing twice, but this is an automaker that seems willing to build a vehicle for nearly every buyer's needs. Evo claims that the high-performance droptop is going to debut at this year's Goodwood Festival of Speed in England from June 26-29.
Judging from the spy shots we've seen, the M4 Convertible will consist of a retractable hard top like the 4 Series cabrio. Other than the roof, there aren't expected to be many changes from the coupe. The engine will be the same turbocharged, 3.0-liter inline six-cylinder engine, but the added weight of the roof and its mechanism may take a small bite out of performance.
We spoke to BMW USA about the rumor and were told that it has no comment at this time. After the M4 Convertible, Evo claims that BMW is working on a M4 Gran Coupe. How that would be all that different from an M3, isn't exactly clear.

BMW announces M235i xDrive, 7 Series Exclusive among summer upgrades

Like any automaker worth its lug-nuts, BMW is constantly striving to improve its products. And so it has announced a series of upgrades for the summer - none of them revolutionary, but a couple of them notable.
For one, the Bavarian automaker has announced that is is offering xDrive traction on the M235i coupe, a model that has been available until now only in rear-drive configuration. The all-wheel drive version comes with the same 3.0-liter twin-turbo inline-six with 326 horsepower (320 in the US market) and eight-speed automatic transmission as the rear-drive version, but now channels that power to all four wheels for a 0-62 time quoted at 4.6 seconds - two little ticks quicker than the existing version. It's the first time that all-wheel drive is being offered on the 2 Series, and will also be fitted on the convertible - at least, that is, in Europe. We're waiting on confirmation of North American availability.
Among the other announcements is a special edition of BMW's flagship luxury sedan. The 7 Series Exclusive Edition upgrades with metallic paint, 19-inch V-spoke alloys, Nappa leather upholstery and a leather-trimmed instrument panel. Buyers will also be able to opt for the Merino fine grain leather and Alcantara roof lining from the BMW Individual catalog, and choose between any available engine or either wheelbase lengths.

Researchers halfway to cutting carbon fiber costs by 90%

Carbon fiber has been utilized for decades to build racecars, as a means to cut weight while maintaining strength. But until recently, the space-age material has been largely absent from the street on anything but supercars because of the expense to use it. Recently, BMW signaled a major shift in that trend when it starting using carbon fiber reinforced plastic panels on the i3 and i8. This relatively small scale start might be just the beginning; the German company believes that a breakthrough to inexpensively manufacture the lightweight stuff is just on the horizon.
MAI Carbon Cluster Management GmbH counts BMW, Audi, Airbus, the German government and many other organizations as supporters, and it's researching how to make carbon fiber cheaper to produce, according to Automotive News Europe. The company thinks it can reduce costs by 90 percent in the near future. "We've certainly reached a halfway point on our cost-cutting target for suitable carbon-fiber parts," said project head Klaus Drechsler to Automotive News Europe.
Unfortunately, it isn't entirely clear just what MAI Carbon is doing to make such a huge leap possible. However, a recent post on the company's website talks about a new form a carbon fiber using a thermoplastic matrix that could be cured in less than three minutes. That's compared to about 90 minutes in the traditional process with an autoclave.