2013 Porsche Cayenne Base Sport Utility 4-door 3.6l 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.

eBay Find of the Day: 1981 Porsche 928 convertible by Carelli

The Porsche 928 was perhaps the consummate European GT of its day. With a powerful front-mounted V8 engine that grew in displacement as the model years went on, it was capable of eating up the miles at triple-digit speeds in great comfort for occupants. It was also an unusual beauty, with its sharp front and curved rear featuring innovative integrated bumpers.
Currently for auction on eBay Motors is one of the rarest 928s you're likely to find, in a handsome combination of Guards Red paint and tan leather interior, though we wouldn't mind a less-showy finish to the factory wheels. According to the seller, this car is one of eight 928 convertibles by Carelli Design, a firm that's still in business.
The auction claims that these cars were made in 1981 as a feasibility study between Carelli and Porsche for a possible production 928 convertible. The seller says he worked at the dealership where the car is said to have been originally sold $103,000. To remove the roof and hide the convertible top, there were significant changes made to the body and interior, including redesigned doors and a completely new trunk. As you can see in the gallery, when down, the top is completely hidden in a very factory-like fashion. When up, it looks slightly awkward, though (and we'd really like to see a rear three-quarter view to check out the blind spots).

24 Hours of Le Mans live update part three

We tasked surfing journalist Rory Parker to watch this year's live stream of the 2016 24 Hours of Le Mans. What follows is an experiment to experience the world's greatest endurance race from the perspective of a motorsports novice. Parker lives in Hawaii and has an associates degree in dropping f-bombs. For Part One, click here. Part Two is here. Really hoped I'd be able to grab an hour or two of sleep before the sun rose over Le Mans. Dark dark dark, couldn't figure out what was going on. Commentators struggled at times as well. But I couldn't do it. Endurance racing is just too exciting. Grabs my attention with both fists. Screams, "watch these men DRIVE!" A neighbor invited me over for drinks. Told him, "Can't do it, gotta watch Le Mans!" Maybe not exactly. I'll admit, at times my attention wandered. I did a load of laundry. Ate some snacks. Half listened to the commentary. Threw a hump at my wife. I learned that Patrick Long, driving #88, is big brother to Kevin "Spanky" Long. Spanky's a bit of a legend in the skate world. Always weird how top notch talent can run in families like that. Kind of surprised I've never heard that before. Worked for a skate mag for a years, met Spanky a handful of times. Someone must've told me that he has an older brother who drives race cars. Dash cams at night are scary. High powered headlights in the P1s reach almost 300 meters. Cars outrun that distance easy. Seems like they're just steering into the black and hoping for the best. But that can't be the case. People'd be dropping dead let and right. Very amused by how the guys in GT are like, "Dude, stop flashing your fucking lights before you pass." But the LMP's are all, "Suck a dick! I do what I want." Top three stayed neck and neck nearly all night long. As the sun gets ready to creep back over the horizon the top three are separated by only eleven and a half seconds. Toyota 5 and 6, Porsche 2. Audi 8 is two laps behind Porsche, beleaguered 7 is dealing with constant trouble eleven laps from the front. GTE Pro sees Ferrari 82 in first, Ford 68 and 69 right behind. To win you've gotta drive perfect, build perfect. Fours cars retired so far. I'm beginning to appreciate the endurance aspect a little more fully. Only really considered the drivers at first. The mental and physical stress driving these cars at these speeds at length would inflict. But keeping the damn things running is the real deal. To win you've gotta drive perfect, build perfect.