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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.

2013 BMW M3 Coupe Lime Rock Park Edition

Sic Transit Gloria
I like difficult cars. I like turbo "moments," dramatic weight distribution, low-grip, peaky power delivery, and overly quick steering, along with ultra-short wheelbases and any number of other non-racecar-perfect dynamic foibles. I love the newest generation of BMW cars and engines - all turbo'd up with tons of torque and power everywhere in the rev range, too. But what I think the enthusiast community will miss when this 2013 M3 Coupe becomes the 2014 M4 Coupe - replacing its idiosyncratic, small-displacement, revvy V8 for something like a triple-turbo, directly injected, inline six-cylinder powerhouse in the process - is the work it takes to drive the car fast and perfectly. Sometimes small flaws just make things better; my mistress' eyes are nothing like the sun, and all that.
The idea of this E92 M3 going away then, magnified by the loss of the M3 badge for the coupe, is at best bittersweet for me. This generation of M car is already surpassed in terms of raw thrills by the better-than-ever Mercedes-Benz C63, a car that doesn't ask its driver to sacrifice low-end grunt or the very latest in amenities in return for stellar backroad performance. Yet any time I've been lucky enough to lap a track in the M3, it has quickly become clear that the Bimmer is the better on-edge tool. With the freedom to wring the neck of the 4.0-liter V8 and room to exercise the lovely balance of the car, the E92 is hard to match (even six years after its debut).

2013 Dinan S3 BMW 550i

Steve Dinan has been enhancing BMW models since 1979. But don't throw his company into the ring with the dozen or so other tuners who tweak, tinker and piggyback upgrades on the famed German marque. Dinan is a tuner, but it's also an engineering firm that writes its own software, builds its own parts and then backs everything it does with a factory-grade warranty. That sort of fastidiousness comes at a price, but most of its customers - including the powerhouse of BMW Motorsport - rely on Dinan to help them come out on top.
In stock form, BMW's 550i is a formidable four-door with a twin-turbocharged 4.4-liter V8 rated at 400 horsepower and 450 pound-feet of torque. While those figures allow it to run with quick company (0-60 in 5.0 seconds, according to the automaker), Dinan puts the sedan's kettle on full boil with its S3 package. Starting with the engine, the performance engineering firm bolts on larger turbochargers, air-to-water intercoolers, a trick strut tower brace cold air intake, a quad-pipe free flow exhaust and its own engine management software. Pump in some premium fuel, and the result is 542 horsepower and 587 pound-feet of torque. Power is sent through the stock eight-speed automatic to a limited slip rear differential (Dinan will upgrade xDrive all-wheel drive models, too).
The Dinan S3 also features and extensive suspension upgrade that includes new front camber arms and low compliance rear control arms (engineered to reduce understeer and improve turn-in). The stock dampers are retained, but new bump stops are installed along with new springs. Overall, the car rides about a half-inch lower than stock to improve roll rate. To reduce unsprung weight, forged 20-inch HRE Performance wheels are fitted at all four corners (wearing Michelin Pilot Super Sport tires - 275/35ZR20 up front and 295/35ZR20 in the rear). Lastly, the company remaps the factory Electronic Damper Control (EDC) software with its own Dinan Shockware to work in conjunction with the new enhancements.