2006 Porsche Boxster 2.7 (987) 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.

Recharge Wrap-up: 2015 Fuel Economy Guide available, how Porsche ships 919 Hybrid

The EPA and Department of Energy have released the 2015 Fuel Economy Guide. Unsurprisingly, the groups say that this year features more fuel efficient and low-emissions vehicles than previous years, and they span a greater variety of vehicle types. The guide also provides "best-in-class" lists, greenhouse gas ratings and estimated fuel costs for each vehicle. The EPA and DOE hope that car buyers will use the guide to help choose cars that are better for the environment and the climate. Check out the guide for yourself or read more in the press release below. To get from one WEC race to the next, Porsche ships its 919 Hybrid LMP1 cars by air. As the team travels around the world - from continent to continent - it must take 35 tons worth of cargo with it, including two LMP1 cars. That means draining fluids, partially dismantling the cars, and fitting everything into a 747. The team also ships items by sea, which requires shipping extra sets of items due to the longer shipping times. "It's all about efficiency," according to Porsche. Read more in the press release below. Terra Motors is unveiling the A4000i electric scooter, which it will sell in Europe, at the EICMA motorcycle show in Milan. The A4000i, which features smartphone connectivity, will be the company's European flagship model. Terra Motors will begin selling in Italy, and plans to make arrangements to sell in several more countries shortly after. Terra hopes to set up manufacturing in Europe, as well. Also on display at EICMA is the company's Bizmo II electric scooter, which has a driving range of 93 miles on a single charge. Read more in the press release below. Volkswagen is providing a 2015 e-Golf to Stanford University for research. The car will be used to study electric mobility, improvements in the driving experience and people's driving behavior and attitudes toward EVs. "Volkswagen's longstanding relationship with Stanford has allowed us to push the boundaries of automotive research and innovation," says Volkswagen's Ewald Goessmann, "and we look forward to extending our work together to drive advances in electric vehicles." See the video and read more in the press release below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. EPA, DOE Release 2015 Fuel Economy Guide for Car Buyers The U.S.

The mood at this year’s Paris Motor Show: Quiet

The Paris Motor Show, held every other year in the early fall, typically kicks off the annual cavalcade of automotive conclaves, one that traverses the globe between autumn and spring, introducing projective, conceptual and production-ready vehicle models to the international automotive press, automotive aficionados and a public hungry for news of our increasingly futuristic mobility enterprise. But this year, at the press preview days for the show, the grounds of the Porte de Versailles convention center felt a bit more sparsely populated than usual. This was not simply a subjective sensation, or one influenced by the center's atypically dispersed assemblage of seven discrete buildings, which tends to spread out the cars and the crowds. There were not only fewer new vehicles being premiered in Paris this year, there were fewer manufacturers there to display them. Major mainstream European OEM stalwarts such as Alfa Romeo, Fiat, Nissan and Volkswagen chose to sit out Paris this year, as did boutique manufacturers like Bentley, Aston Martin and Lamborghini. This is not simply based in some antipathy on the part of the German, British and Italian manufacturers toward the French market — though for a variety of historical and societal reasons that market may be more dominated by vehicles produced domestically than others. Rather, it is part of a larger trend in the industry. Last year, Mercedes-Benz announced that it would not be participating in the flagship North American International Auto Show in 2019 — and that it might not return. Other brands including Jaguar/Land Rover, Audi, Porsche, Mazda and nearly every exotic carmaker have also departed the Detroit show. Some of these brands will still appear in the city in which the show is taking place, and host an event offsite, to capitalize on the presence of a large number of reporters in attendance. And even brands that do have a presence at the show have shifted their vehicle introductions to the days before the official press opening in an attempt to stand out from the crowd. In many ways, this makes sense. With an expanding number of automakers, with diversification and niche-ification of models and with wholesale shifts that necessitate the introduction of EV or autonomous sub-brands, there is a growing sense that, with everyone shouting at the same time, no one can be heard.