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These BMW M6 GTLM racing liveries are great

This weekend we'll see a whole new crop of racing machinery line up for the start of the 24 Hours of Daytona, including the new BMW M6 GTLM. So far we've only seen it in flat black, but now the Bavarian automaker has revealed two special liveries for the two cars it will be fielding in the race this weekend. The number 25 car features a throwback livery that reinterprets BMW's classic racing stripes of red, dark blue, and light blue over white bodywork. It's designed to be reminiscent of – and even features images of – legendary racing machinery from the Roundel marque's history. Those include the 3.0 CSL that wore the same number when it took the company's first win in the US at Sebring in 1975, the M1 sports car from the early 1980s, the V12 LMR that scored BMW's only Le Mans victory to date in 1999, and the M3 GT that dominated the American Le Mans Series in 2011. The second car features a more futuristic livery, wearing the number 100 to mark the automaker's centenary and a multicolor lattice design applied with a luminescent 3D-effect reflective vinyl on a white body. They'll both be fielded by BMW Team RLL, a partnership between the manufacturer and Rahal Letterman Lanigan Racing (of Indy fame), which took a class win at Laguna Seca last year. The new M6 GTLM replaces the previous Z4 GTLM and will proliferate across racing grids in motorsport series around the world following its race debut this weekend. But it won't be the only new piece of racing kit turning a wheel in anger for the first time at Daytona; the new Ford GT and Ferrari 488 GTE will be competing in the GT Le Mans class alongside proven competition machinery. BMW Team RLL reveals 100th anniversary livery for the BMW M6 GTLM race cars in Daytona. Daytona (US), 27th January 2016. BMW Team RLL today revealed two commemorative 100th anniversary liveries for the new BMW M6 GTLM race cars, with which Bobby Rahal's (US) team will compete in the 24 Hours of Daytona (US). The race forms the first round of the 2016 IMSA WeatherTech SportsCar Championship (IWSC). The number 25 car sports a look reminiscent of the iconic BMW 3.0 CSL, which contested its first season of racing in North America back in 1975 and claimed the first victory in Daytona 40 years ago. The second BMW M6 GTLM will race with the number 100. To mark BMW's 100th anniversary this year, its livery looks to the future.

Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

History of BMW touring cars looks splendid in Adrenalin trailer

More high-quality documentaries about the history of motorsports are always welcome. When thinking about racing, we generally focus on moving forward to go a little faster or shave a tenth of a second off a lap. There's not much time to look backward. It's too bad, because there are so many fantastic stories from the sport's history. Thankfully, an upcoming doc is taking on the challenge of telling some of these tales, and it looks like a movie not to miss, especially for BMW fans.
Adrenalin - The BMW Touring Car Story mixes high-quality, vintage footage with new interviews from many of the drivers of these machines to craft what looks like a fantastic experience. Covering the period from the '60s to the modern DTM era, just the trailer shows racing from the 2002, 3.0 CSL and of course the E30 chassis M3 of the '80s. You also get to hear from legends behind the wheel like Hans-Joachim Stuck, Johnny Cecotto and Joachim Winkelhock telling their stories.
Adrenalin comes out in November on DVD, Blu-Ray and on-demand. Check out its trailer above for a taste at what it's aiming for. The documentary definitely looks like one to watch.