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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.

Evo pits BMW M3 against Porsche Macan in drag battle

If you want to move five passengers in very rapid fashion and you've got a $75,000 budget, two newly introduced four-door models immediately come to mind - both are the highest performing vehicles in their respective segments. But which is faster off the line, to the 60-mile-per-hour benchmark or flat-out over an even longer run? Evo took both to paved aircraft runway to find out.
In lane one we've got the all-new Porsche Macan Turbo, which boasts a twin-turbocharged, 3.6-liter V6 rated at 400 horsepower and 406 pound-feet of torque. The Porsche is fitted with a seven-speed, dual-clutch gearbox, and the 4,244-pound crossover has the traction advantage of standard all-wheel drive. In lane two is the all-new BMW M3, powered by a twin-turbo 3.0-liter inline-six rated at 425 horsepower and 406 pound-feet of torque. It is also equipped with a seven-speed, dual-clutch gearbox, but only the rear wheels of the 3,595-pound sedan are driven. Both the BMW and Porsche arrive with launch control, which helps to remove driver error off the line.
Which automaker's launch control system is better off the line? Does all-wheel-drive grip give the crossover the advantage it needs to overcome its adversary's power-to-weight advantage? Will aerodynamics factor into the results? Which would you put in your garage, and why? The video may surprise you.

Recharge Wrap-up: Uber,'s free BMW 7 Series rides, Belfast's DeLorean EV

BMW used Uber to give people free rides in the new 7 Series. While the new generation of BMW's luxury flagship goes on sale in the US on October 24, lucky Uber customers in New York, Miami, Chicago and Los Angeles got a sneak preview and free ride on October 17 and 18. The partnership also allowed potential customers to test drive the car with a BMW product specialist. "With our new 7 Series being the most innovative vehicle in its class, it's only fitting that we partnered with Uber to offer a unique and exciting way to experience our flagship model prior to retail launch," says BMW's Jason Chan. Read more from BMW. BMW is using manure to power its South Africa production facility. As part of a broader goal to get all its energy from renewable sources, BMW will get as much as 4.4 megawatts of electricity from a biogas plant that produces power from gas emitted by manure and other organic waste. At full capacity, it will supply about 25 to 30 percent of the BMW plant's power. "We are a big consumer, so that's a lot," says BMW spokesman Diederik Reitsma. "It's waste no longer wasted." Read more at Bloomberg. Visa Europe has extended it partnership with Formula E. Visa Europe signed on as the Official Payment Partner of the electric racing series for the European leg of last season, and has now expanded its commitment for the next three seasons. The company lends its name to the championship's Visa Fastest Lap Trophy. "Formula E is driving the change towards an electric future and reinventing motorsport, while here at Visa, we're reinventing payments by pioneering technologies to make payments faster, simpler and more secure," says Visa Europe's sales and marketing chief, Mark Antipof. "We seek partners that match our commitment to innovation and leadership, so it was therefore natural for us to extend our support of this evolutionary sport through a global sponsorship for the next three years." Read more from Formula E. Queen's University Belfast is set to unveil its electric DeLorean DMC-12 on October 21, 2015. The date is notable for being the day to which Marty McFly traveled in Back To The Future using Doc Brown's DeLorean time machine. In what is likely the first DeLorean to be built in Northern Ireland since 1983, students and staff from the university's School of Electronics, Electrical Engineering and Computer Science have restored the car and converted it to run on electricity.