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2016 BMW M4 GTS: More power, less weight, ready for the track

BMW calls its new M4 GTS the "most agile, radical, and powerful M4 ever." It's got 493 horsepower, a slick new water injection system, a three-way adjustable coilover suspension, and a weight reduction of roughly 200 pounds compared to a stock M4. Only 700 will be built, with 300 allocated for the United States. And did we mention it looks absolutely killer? Let's talk about that water injection system for a moment, because it's the first time this technology is being used on [an intercooled - Ed.] production road car. Basically, water absorbs heat from surrounding air, so a fine mist is sprayed into the intake manifold where it evaporates, lowering the temperature of the intake air. BMW says this reduces final compression temperature, allowing the turbochargers to operate with increased boost pressure and better spark timing. The end result is increased output – 493 horsepower and 442 pound-feet of torque from the same twin-turbo, 3.0-liter straight-six as the standard M4. That's an increase of 68 hp and 36 lb-ft. But the GTS isn't just about increased power. In fact, the bigger story is its weight reduction. BMW incorporated the use of aluminum and carbon fiber throughout the M4's construction, and DIN curb weight is listed as 3,329 pounds. It's unclear if that's the exact US measurement, and BMW couldn't comment on that as of this writing, but compared to our 3,530-pound stock M4, that represents some 200 fewer pounds of heft. Carbon fiber reinforced plastic (CFRP) is used in the hood, making that part some 25 percent lighter than the stock piece. CFRP is also used for the driveshaft, making it 40-percent lighter than the standard setup. Even inside the car, the new center console is 30-percent lighter than what you'd find in a normal M4. The rear seats are gone, and we're sorry to say that the cool racing buckets pictured here won't be available in the US. Making this thing super capable at the track is a three-way M coilover suspension, combined with upgraded carbon ceramic brakes, set behind staggered wheels and tires. Up front, the GTS rides on 19-inch rollers wrapped in 265/35-series Michelin Pilot Sport Cup 2 tires, and out back, 20-inch wheels are fitted inside 285/30-series rubber. The only transmission available is the seven-speed, M DCT dual-clutch unit, and when all is said in done, BMW says the M4 GTS will run the infamous Nurburgring Nordschleife in 7 minutes and 28 seconds. Another cool feature: organic LED technology.

GRAND-AM, IMSA announce deal to bring DTM racing to US

It won't be until 2015 at the earliest, but the International Motor Sports Association (IMSA), Grand-Am and the Internationale Tourenwagen-Rennen have agreed to a licensing and cooperation deal that could bring a version of Germany's DTM series to the US.
When the American Le Mans Series and Grand-Am are officially combined next year, the resulting body will be called United SportsCar Racing (USCR). IMSA will be the sanctioning body for that series, and DTM races could be run as support events. It was also suggested by an ALMS chief that DTM races could be standalone or join NASCAR and IndyCar weekends.
With the so-called DTM America finally agreed to, there is now a way for manufacturers to run the same DTM-type cars in Europe, the US and Japan - last year Japan's Super GT series agreed to adopt "the basic technical regulations" of DTM for the GT500 class, the top class in the series. That already puts six manufacturers in play: Mercedes-Benz, Audi and BMW that run in Germany's DTM and Honda, Nissan and Lexus that run in Super GT. The DTM oversight body has invited American brands to Germany for the opening round of the 2013 season, and will begin actively courting their participation in the US series. Check out the press release from Audi with comments on the deal below.

AC Schnitzer's hotrod BMW 318ti remembered by MotorWeek

There are plenty of compact luxury cars available in the US today, including the Audi A3, BMW 2 Series, and Mercedes-Benz CLA-Class. In the '90s, the BMW 318ti tried to offer a similar mix of luxury at a reasonable price, but it never quite found much success in America. The 318ti looked like an E36-generation 3 Series in front but featured a stumpy liftback at the rear. The only engine available in the US was a four-cylinder. If you had the money, though, the aftermarket was ready to give you more power and more aggressive looks. AC Schnitzer dropped a bored and stroked 3.0-liter inline-six under the hood to create a pocket-sized hot rod, and MotorWeek took it for a drive. The model in this video was the promo car for AC Schnitzer's US importer, and it had every upgrade possible to show off what the German tuner's produced. Under the hood, the company installed an upgraded engine with 241 horsepower and 228 pound-feet of torque. For comparison, a US-spec M3 of the era had 240 horsepower and either 225 or 236 lb-ft, depending on the model year. AC Schnitzer also sharpened the 318ti with a suspension overhaul and short shifter. According to MotorWeek's tests, the mods got the hatchback to 60 miles per hour in 6 seconds and gave 318ti laudable handling. So much performance wasn't cheap, though. The upgrades on the promo car cost more than twice as much as the 318ti's base price. Watch this Retro Review to find out the massive amount you needed to pay to get M3 performance in a tiny package. Related Video: