1988 Bmw M6 No Reserve on 2040-cars

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BMW M6 GTLM already looking mean ahead of Daytona debut

BMW Motorsport is preparing to roll out the new M6 GTLM. And Americans will be the first to see it when it marks its debut during this week's IMSA test session at Daytona International Speedway. After that, two of the new competition machines will be campaigned by Rahal Letterman Lanigan Racing in the IMSA SportsCar Championship. Designed to compete at the top levels of sports car racing, the new M6 GTLM will be the successor to the Z4 GTLM and the M3 GT2 before it. And with its introduction, the quasi-works RLL outfit will have been there for all three. The team co-owned by Indy legend Bobby Rahal, talkshow host David Letterman, and industrial crane magnate Mike Lanigan, has won the IndyCar championship three times, the Indy 500 once, and has recorded dozens of race wins, poles, and podium finishes. RLL branched out into sports car racing in the American Le Mans series in 2009 and has won several titles since. The new M6 racer will have some heady competition to deal with in the IMSA's GT Le Mans class next season. Among the new machinery we can expect to see on the grid in the coming year will be the new Ford GT, Porsche 911 RSR, Corvette C7.R, and possibly the new Ferrari 488 GTE, as well. Another version of the BMW entry is being prepared for privateer teams competing in the GT Daytona class, where it will have to contend with the likes of the Audi R8 LMS, Dodge Viper GT3-R, and Lexus RC F GT3. We're looking forward to seeing what the Bavarians will have to throw at 'em when the M6 GTLM debuts at Daytona this week. In the meantime, you can scope the machine out in its primer coat while undergoing a shakedown at Sebring in the gallery above.Related Video: 2016 BMW M6 GTLM to Make US Public Debut at Nov. 17-18 IMSA Daytona Test Woodcliff Lake, N.J. – November 13, 2015... BMW Team RLL will participate in the Nov. 17-18 IMSA test at Daytona International Speedway marking the first public test of BMW's latest endurance racing challenger, the BMW M6 GTLM. As announced during last season's Petit Le Mans weekend, BMW Team RLL is expected to campaign two M6 GTLM race cars in the 2016 IMSA WeatherTech SportsCar Championship. The M6 GTLM recently completed its first US test at Sebring International Raceway in late October along with a M6 GT3 machine that will provide the foundation for BMW's worldwide customer racing program.

BMW X4 opens up alongside its boxier brother

It doesn't seem so long ago that BMW (not to mention Audi, Volvo and a handful of other European automakers) weren't in the crossover market. But it's been over a decade since BMW began producing the first-gen X5, and in the fourteen years since, the Bavarian automaker has steadily expanded its portfolio to include the X1, X3 and X6.
The next to join the family will be the X4, which is essentially to the X3 what the X6 is to the X5. That is to say, basically the same vehicle, only with an (arguably) more stylish but less utile roofline. Previewed in concept form at the Shanghai Auto Show half a year ago, the X4 has been snapped by our plucky paparazzi in the past, but this is the first time we've seen inside.
Not only that, but the prototype in question was spotted next to the current X3 on which it is based, which gives us ample opportunity to see the differences between them. Of course, that still primarily comes down to the slantback profile, because otherwise, the two are essentially the same inside and out. Or at least they will be: many of the differences between the two are expected to port over to the X3 when it's refreshed next year, including some subtle interior upgrades - just not the roofline.

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.