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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.

Porsche 911 hybrid could get green light after all

The prospect of producing a hybrid version of the Porsche 911 has been on and off the table more times than we'd care to count. But before the year is up, the German automaker will make up its mind whether or not it will put the idea in motion. Porsche currently offers more plug-in hybrids than any other automaker. And according to Porsche CEO Matthias Muller in speaking with Automotive News, the opportunity exists to expand the powertrain technology to every model in the company's lineup, including the 911. The sports car would likely be the next in line for hybridization, said Muller, giving Porsche a direct competitor to the BMW i8. It wouldn't be the first time Zuffenhausen would slot a hybrid powertrain into the iconic rear-engined coupe, having previously raced the 911 GT3 R Hybrid (pictured above), but it would be the first road-going version available to customers. "That is a technique which we at Porsche are very familiar with," Muller told AN, "so we can suppose that we could have plug-ins all over the model range, not only to save fuel but also to boost the performance of these cars." Currently the E-Hybrid versions of the Cayenne and Panamera which Porsche offers account for roughly 15 and 11 percent of their respective model lines' sales in the US, while the 918 Spyder, of course, is offered only as a hybrid. If the 911 hybrid gets the green light, that would leave only the Macan, Boxster and Cayman without the option of electric assist. Related Video:

CEO says Volkswagen's buying spree is over

After adding Italian motorcycle icon Ducati to its stable and spending $5.6 billion on the rest of Porsche, Volkswagen CEO Martin Winterkorn says he's done shopping for a while.
"We have enough to do at the moment in taking our twelve brands to where we want to be," Winterkorn tells German newspaper Handelsblatt.