2004 Bmw Z4 3.0i Convertible 2-door 3.0l on 2040-cars

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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.

Behind the scenes of BMW's 'Drift Mob,' Part 1

Generally speaking, marketing and journalism don't mix, but every now and then, what goes into the marketing of a car - the 2015 BMW M235i, in this case - is worth documenting. In that spirit, we took BMW up on its offer to bring us behind the scenes of its upcoming "drift mob" video, starring five red M235i coupes frolicking around a traffic circle in a major world city (BMW has asked us to be coy about which one so as not to blow its cover before the shoot).
The five drivers can all be considered legends of modern-day drifting and stunt driving: Rhys Millen, Samuel Hübinette, Dai Yoshihara, Rich Rutherford and Conrad Grunewald.
As the only US media outlet in attendance, Autoblog plans to follow up with a full story on the experience once BMW polishes and releases the video in a month or so. In the meantime, check out our photos of this epic practice session we captured on our first day hanging with the crew, and be sure to watch this space for more behind-the-scenes action.

BMW is ready for our inevitable EV future  

Is "rolling lithium" a thing, yet? Because BMW is trying to make this — the opposite of " rolling coal" — happen at this year's Los Angeles Auto Show. The Bavarian vehicular group is showing five all-new electric-powered concepts or production models in L.A. These include the C-Evolution, a 99-mile range scooter from BMW Motorcycles; the 150-mile range, two-door hardtop Electric Concept from Mini; and three vehicles from its advanced i sub-brand: the i3S, a sportier and more potent version of the brand's electric commuter nodule; the i Vision Dynamics four-door coupe concept, featuring a sporty four-second 0-60 time and a professed 373 mile range; and the long-promised roadster version of the i8 supercar, with just two seats, a bikini top, and an enhanced power pack providing 18 miles of range. The unveiling of these vehicles in Los Angeles makes perfect sense to us. California is one of the world's largest markets for luxury automobiles. It is also America's biggest market for electric-powered vehicles. Studies show that the state's combination of fiscal incentives, trendsetting cultural positioning, legislative requirements and massive population contributed to the purchase of half of the country's EVs and hybrids this decade. "The customers for the brand are mainly on the West and East Coasts, and the California customer especially is interested in sustainability and environmental protection," said Robert Irlinger, head of BMW's advanced i sub-brand. The bigger question revolves around BMW's larger EV strategy. Given the current global regulatory environment, with its rightful pressures on increasing efficiency and decreasing emissions to help soothe our warming planet and save all life on it, luxury automakers seem to be making a push toward developing a range of battery-powered vehicles to be available around or after the start of the next decade. It seems BMW, with its varied subsidiaries — from lightweight scooters to ultra-luxury barges — is uniquely poised to provide an array of such vehicles. "In the first stage of i back in 2013, we brought what you could call 'bookmark' cars to the market — the i3 commuter and i8 sports car — to show the range of what an electric vehicle could be," said Irlinger. "Now, we are seeing growing interest from customers to bring electrification to the heart of the brand, even to a sport sedan like our i Vision Dynamics four-door coupe.