1980 Porsche 911sc Sunroof Coupe Barn Find Project Car 911 on 2040-cars

Auto blog

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 offers design walkthrough of Panamera Sport Turismo

The Porsche Panamera Sport Turismo was arguably the best concept car of 2012, and Porsche has been building upon that momentum by teasing us with videos of its first-ever station wagon design. After showing us some driving shots of the Sport Turismo, Porsche released a more in-depth and behind-the-scenes look at what it took to take the Panamera shooting brake from a full-scale clay model to the final product we saw on stage at the Paris Motor Show. In the video, Michael Mauer, Porsche style director, and Mitja Borkert, general manager advanced design style, both give a little insight about what went into creating the Sport Turismo Concept.
More than just a station wagon version of the Panamera, the Sport Turismo has a totally distinctive look nose to tail. Some of the key elements the designers touch on in the video include the Porsche-signature raised front fenders, the wide rear shoulders, the front wing inspired by the 918 Spyder, and even some of the car's unique touches, including the headlights and the three-dimensional "Porsche" lettering across the liftgate made from glass. One of the more exciting aspects of the concept - which is sadly just glossed over in the video - is the rear liftgate spoiler that features "variable aerodynamics" that sounds like it acts similar to the retractable spoiler on the current Panamera.
We still don't know if the Panamera Sport Turismo will make it into production, but if you want to see what went into creating this exciting concept car and see the different build phases designers went through to create the Paris show car, check out the video by scrolling below.

Watch Jay Leno's Garage work on a Porsche 911 and others

Jay Leno doesn't just own a bunch of cars – he restores them. (Or has people who restores them, at any rate.) For this latest video, he's showing us some of the projects he and his team are currently working on. The tour-de-garage starts with a 1953 Cunningham that had been in storage since '68, complete with a copper grille ready for plating and a 331 Hemi V8. Jay says that every one of the cars that Briggs Cunningham made is still on the road – but that's just one of the dozen or so projects Jay and company are working on. There's a suitably brown '71 Porsche 911 T in near-original condition having sat untouched parked underground in Beverly Hills for decades, and a '58 Chrysler Imperial convertible once driven by Clark Gable and Frank Sinatra, and now getting a brake upgrade. There's a Volvo 122 wagon that's been stripped down, media-blasted, and powder-coated, a thousand-horsepower Rolls-Royce, a 1960 Nash Metropolitan, a supercharged Mercedes-Benz 600 Pullman, and a 1914 Detroit Electric. And those are just the four-wheeled automobiles. Over in the two-wheeler section there's a pair of Brough Superiors, a BSA, an Indian, and a custom racing sidecar that Jay's mechanic Bernard is working on. In short, Jay Leno's Garage isn't just one where vehicles are kept – it's one where vehicles are brought back to life. Related Video: News Source: Jay Leno's Garage via YouTube Chrysler Mercedes-Benz Porsche Classics Videos Jay Lenos Garage bsa