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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 RSR stops just long enough to have its photo taken

When it comes to Porsche and its rapidly escalating endurance racing program, all eyes may be on the new 919 Hybrid - and with good reason: that's the vehicle with which Porsche will be challenging the likes of Audi and Toyota for wins in the top-tier LMP1 class of the FIA World Endurance Championship and at Le Mans. But it's the 911 RSR that does and will continue to form the backbone of the factory's effort.
The 470-horsepower racing version of the road-going 911 took a one-two finish in its class at Le Mans last year, and also won its class at the Daytona 24 this past January as well. This year Porsche will field two of them in the WEC, another two in the United SportsCar Championship here in the US and will sell countless more to customer racing teams that will undoubtedly continue to rack up trophies in racing series around the world. This, then, might be a unique chance to see one standing still. Check it out in our gallery of live images above from the Geneva Motor Show.

Porsche has doubled US sales to women [w/videos]

Porsche is having a good sales year in the US, with 25,129 vehicles delivered year-to-date coming off the automaker's best July sales ever. That's a 31-percent increase over the same period last year (19,253 deliveries). With year-to-date Panamera sales a surprising 36 percent lower than last year, what possibly could be driving Porsche's sales surge? If you answered Cayman and Boxster sales, you're right. But dealerships are noticing another factor: more women are coming in to buy Porsches, CNBC reports, the bulk of whom picked up new Cayenne SUVs. The German automaker's sales to women in the US have more than doubled in the past two years, increasing from 7 percent to 15 percent. This has helped year-to-date Cayenne sales reach 11,082 - 31 percent higher than the same time last year.
Porsche executives have been trying to tap into the women's market, as evidenced in part by the company's move to pick professional tennis player Maria Sharapova as a brand ambassador. Porsche maintains it has not moved to dramatically change its brand image, but it has shown a number of ads in recent years that uncharacteristically emphasize its vehicles' practicality under the "Engineered for Magic. Everyday" banner - some featuring female drivers.
Be sure to watch CNBC's video report on Porsche's female movement below - you'll also find one of the aforementioned Engineered For Magic ads as well as an interesting case study video on the campaign from ad agency Cramer-Krasselt.