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BMW M3 and M4 will rock 430 hp from twin-turbo six with standard manual [w/video]

We're not sure which spec we're most intrigued by for the new BMW M3 and M4: the twin-turbo six-cylinder with 430 horsepower and "far beyond" 369 pound-feet of torque, the 3,300-pound curb weight or the standard six-speed manual transmission with automatic throttle blipping on downshifts. That engine is fitted with both Valvetronic and Double-Vanos, twin-wire arc-spray coating in the cylinders instead of liners to save weight, a track-ready cooling system with additional radiators, a forged crankshaft, dry-sump lubrication and a magnesium oil sump. BMW says its "high revving concept" has a redline beyond 7,500 rpm.
In the M4, it will be pulling a coupe with "a weight of just under 1,500 kilograms," which is 3,300 pounds to you and me. That number is said to include no driver and 90 percent fuel, but we're still waiting on the exact number and specs. BMW says it's "around 80 kilograms lighter than a comparably equipped predecessor model," putting the power-to-weight ratio at something like 7.68 pounds per horsepower at the same time as it helps reduce fuel consumption by 25 percent. The use of carbon fiber reinforced plastics (CFRP) for the roof, drive shaft (with no center bearing), trunk and front strut brace, and forged aluminum for suspension components, have aided in the weight loss. This time around, the sedan - the M3 - will also get a CFRP roof.
The default option will be a six-speed manual.

BMW to offer carbon fiber wheels in a year or two

The Citroën SM sat on the first set of production glass fiber and resin wheels in 1972 when parent company Michelin developed the exotic hoops in order to take the SM rallying. It wasn't until 2008 that we got the first all-carbon-fiber wheel for passenger cars in the form of a prototype model from Weds Sports in Japan that remained a prototype. Australian company Carbon Revolution followed that a year later with its CR-9 all-CF wheel, first introduced on the Shelby Ultimate Aero and now available for independent purchase for about $15,000 per set. BMW could be the first OEM to offer entire wheels in carbon fiber reinforced plastic in two years.
The wheels - either all-CFRP or using a CFRP rim and alloy spokes - were shown off during BMW's Innovation Days in Munich and are products of the development work done on its i-branded cars. The full-CFRP wheel is 35-percent lighter than a forged alloy wheel, the hybrid alloy and CFRP wheel is 25-percent lighter, making for a decent drop in unsprung rotating weight. As demonstrators during a tech day the wheels aren't yet in the pipeline for production and EU approval, but an article in Auto Express claims that they could be on the market as soon as two years from now.
Other possible parts include a full carbon fiber steering wheel and propeller shaft, the latter of which is coming as a single-piece component on the new M3 and M4. BMW is also talking up its use of secondary carbon fiber - waste material from i3 and i8 production - that can be used for items like IP support structures, seat frames and spare wheels in place of traditional metals like aluminum and magnesium. There's an excerpt of the Innovation Day press release below with more details.

EPA: Four 2014 Mini Cooper models need to drop mpg numbers

After the huge problems that Hyundai/Kia experienced with its mislabeled fuel economy labels, you'd think that any time an automaker has to adjust its mpg numbers, heralds would be shouting from the rooftops. But, after Ford admitted to three big mistakes with its numbers for the 2013 C-Max Hybrid and Mercedes-Benz had to lower the fuel economy rating for the C-Class, we understand if those heralds are a bit tired by now. The models affected include the 3-door and the 3-door S. Still, today's news is that BMW has to lower the fuel efficiency numbers for four versions of the 2014 Mini Cooper thanks to an audit conducted by the EPA and then some joint re-testing. The models affected include the 3-door with the 1.5-liter engine and the 3-door S with its 2.0-liter powerplant, with both manual and semi-automatic transmissions. As with the Benzes, the rating changes are not big ones, around one or two miles per gallon. The big exception is the manual S 3-door's highway number, which lost four mpg from 38 to 34. You can see all the numbers, new and old, in the press release below, but the EPA isn't saying what caused the problem this time. The Agency's new test procedures can't come fast enough. It should be noted that the 2015 Mini Cooper was recently delayed a bit because of the extra time it took to get the EPA numbers right. There's no confirmation that these two items are connected, but we would not be surprised to hear they were. EPA Requiring BMW to Correct Fuel Economy Labels for Four Mini Cooper Vehicles Washington - The U.S. Environmental Protection Agency (EPA) is revising estimates for four 2014 BMW Mini Cooper vehicles to ensure consumers are given accurate fuel economy values. The EPA performed a fuel economy audit on the BMW Mini Cooper and obtained values that differed from those BMW submitted to EPA for certification. With EPA oversight, BMW conducted new emissions and fuel economy testing, and EPA conducted its own testing at its National Vehicle and Fuel Emissions Laboratory in Ann Arbor, Michigan. As a result of this subsequent testing, EPA is requiring BMW to relabel four of its 2014 Mini Cooper models with lower fuel economy values. The specific changes to fuel economy stickers are listed in the table below.