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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.

Recharge Wrap-up: No Tesla Gigafactory deal with California, BMW i3 recalled

Before the Nevada announcement was hinted at, a deal to incentivize a Tesla Gigafactory in California fell through. Tesla was looking for around $500 million in incentives, which the California Governor's Office of Business and Economic Development was willing to offer in tax breaks along with making the permit and environmental processes easier. According to Senator Ted Gaines, there still remained "a gap between what Tesla wanted and what California was willing to offer," the contents of which were undisclosed. California could still be chosen for another of Tesla's battery plants, should those ever materialize. Read more at The Desert Sun. The California Air Resources Board (CARB) will consider allowing a bit of compliance flexibility to its Zero Emission Vehicle (ZEV) regulations for some automakers. CARB will hold a hearing to discuss giving intermediate volume manufacturers (IVMs) - carmakers that do between 4,501 and 60,000 new vehicle sales in the state - some leniency catching up to the larger manufacturers when it comes to clean vehicle production. The ZEV regulation changes take into account the amount of revenue IVMs have available for developing the cars, particularly plug-in hybrids. Read more at Green Car Congress or see the notice from CARB here. Certain units of the BMW i3 are subject to an airbag recall. For cars built March 31, 2014, the passenger airbag inflator may have been assembled incorrectly, which could keep it from deploying when needed. Owners will be notified by BMW, and the problem will be fixed for free. The recall also affects certain 2014 Mini Cooper models. Learn more at the NHTSA website. The Renault-Nissan Alliance is providing 200 electric vehicles to telecommunications company Orange in France. The cars, which will include the Nissan Leaf, Nissan e-NV200, Renault ZOE and Renault Kangoo ZE, will be used mostly for carsharing. Through the program, Orange employees can book a car for work or personal travel using a smartphone. The Alliance will also help Orange install charging stations for the new cars. The addition of the EVs to the fleet will help Orange achieve its goal of reducing its carbon footprint by 20 percent by 2020. Read more in the press release, below. Jianghuai Automobile Company (JAC) is delivering its first 100 EVs to the US. The shipment is part of a larger order of 2,000 cars to be sold by GreenTech Automotive in the US market. Read more at ECNS.

The next-generation BMW M5 starts here

The next-generation BMW 5 Series hasn't even arrived yet, but BMW is hard at work testing the hottest version of the popular sedan – the sixth-generation M5. Now admittedly, these photos might not look much like an M5. The wheels are big, but not uncommonly so. There's no wild and crazy body kit, or hugely flared wheel arches. But what's that in the back? Are those four exhaust tips? Why yes, yes they are. And take a second look at those wheels. Notice the pizza-pan-sized brakes and huge calipers? Yet another M5 giveaway. But as our spies rightly point out, even though this does represent development work on the next M5, it's a very early prototype. That could also explain the charge port on the driver's side front fender, a feature that we've seen on other 5 Series prototypes. This does not mean the next M5 will be a plug-in hybrid, however. What the next M5 will likely be, though, is all-wheel drive. This isn't a huge surprise, considering that the Mercedes-Benz E63 AMG has already gone AWD, while the Porsche Panamera Turbo and Audi RS6/7 have always had four driven wheels. BMW has even hinted at just such a development, with former M boss Dr. Friedrich Nitschke going as far as saying AWD could arrive on the next M5. "On our cars we are thinking of all-wheel drive, but it won't come before we get the successor of the M5 and M6," Nitschke said in an October 2013 report. "That's the timing and it's not practical to react in the current life cycles." At this point, it's simply too early to guess at when or where the next-generation M5 will debut. We're expecting the next-gen 5 Series at either the 2016 Geneva Motor Show or Auto China 2016 in Beijing. The next M5 could join it, although it's possible it'd get its very own debut at a later date.