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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.

Some kind of Porsche 911 spied in Germany

Seeing a Porsche undergoing testing in Germany – even at the Nurburgring – is hardly a rare sight. But this one has us scratching our heads. Though almost entirely devoid of any sort of camouflage, this particular 911 clearly has something going on. It's got LED daytime running lights (similar in appearance to those on the Cayman GT4) integrated into the front end, extra air vents around back, and a pair of exhaust tips poking out the middle of the rear bumper. In the end, we could be looking at the upcoming facelift scheduled for the 911 that will see it shift to forced induction across the entire range (save for the GT3 and GT3 RS) – or this could be another version of the existing model. Porsche has been known to churn out a steady stream of those, after all. One way or another, though, it looks like we'll be finding out sooner than later – judging from how ready this particular Elfen looks to hit the show stand and showroom. Related Video: Featured Gallery Porsche 911: Spy Shots View 18 Photos Image Credit: CarPix Spy Photos Porsche Coupe Performance

Porsche celebrates 50 years of 911 with some excellent pics

The Porsche 911 is one of the most iconic sports cars of all time, and to celebrate the car's first 50 years, Porsche has released a stunning set of photos showing how far the 911 has come from the original back in 1963 to its current 991 generation. Unlike the recent 60-year photo spread that Chevrolet put together for the Corvette, though, Porsche's gallery only shows the original 911 and the current car.
Each time the 911 is redesigned, the car's front fenders, roofline and the shape of the side windows are key focal points. Even some of the interior cues have remained the same over the years, including the positioning of the ignition key on the left of the steering column and the five-gauge instrument cluster layout.
Scroll down for Porsche's press release breaking down the seven generations of the 911, and be sure to check out our gallery with plenty of high-res pics for you to download as a desktop wallpaper. In fact, we're providing these at 1920-pixels-wide instead of our usual 1280 wide. Enjoy!