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Next-gen Porsche Panamera loses its buttons

We have our first interior images of the next-generation Porsche Panamera. Caught undergoing testing in what looks like the area around Ann Arbor, MI, Porsche's second-gen sedan ditches the multitude of buttons found on the center stack of today's cars in favor of touch-capacitive controls. The new look works on the interior. It's clean and stylish, and the overall layout is clearly inspired by the Panamera Sport Turismo concept. We're particularly fond of of one of the features absent on the concept car – the wide, high-resolution infotainment screen. Judging by the lack of a dedicated controller on the center stack and the screen's proximity to where the driver's right hand would be, this is almost certainly a touchscreen. According to our spies, the software on that screen will be shared with Bentley, as will the Panamera's underlying platform. The new steering wheel, meanwhile, looks like it's been plucked straight from the 918 Spyder. There's a very visible protrusion at the four-spoke wheel's four o'clock position, and the button layout on the spokes looks identical to the hybrid hypercar. On the 918, this controller manages the hybrid systems, but as our spies claim this is the gas-powered Turbo S model, we aren't really sure what role it will play as we can clearly see drive mode controls on the center console. Speaking of the Sport Turismo, this prototype backs up the argument that the next Panamera will adopt the cleaner look of the 2012 Paris Motor Show concept. Even with the camouflage, the C-pillar and rear quarter window, squared-off trunk aperture, and the four LED accents in the headlights are clearly inspired by the Sport Turismo. However, the concept's most dramatic feature – its strong hatchback profile – doesn't seem to have made the transition into this prototype. We'd expect to see the new Panamera in either Geneva or Paris. The Swiss show is the unlikely choice, though, considering it's just over a month away and Porsche already has another big debut planned. So expect the new Panamera in the City of Light. Sales should begin some time in 2017.

Conquest and controversy conclude the 2014 Rolex 24 at Daytona [spoilers]

If you don't wish to know who won the 2014 Rolex 24 at Daytona, you should avert your eyes right now. We'll even give you a double-space to skedaddle...
For those of you still with us, the first race in the United SportsCar Championship (USCC) is done, but the discussions about it certainly won't end for a while. Daytona Prototypes claimed the first four overall places, the top spot taken by the No. 5 Action Express Coyote-Chevrolet Corvette DP driven by Joao Barbosa, Christian Fittipaldi, Sebastien Bourdain and Burt Friselle. The 16th and final caution of the race bunched the field up for an eight-minute sprint to the flag, so the first place getter finished just 1.4 seconds ahead of the No. 10 Wayne Taylor Racing Dallara-Chevrolet Corvette DP driven by Max Angelelli. Third place went to Brian Friselle in the No. 9 Action Express Chevrolet Corvette DP, 20 seconds down. Chevrolet power hasn't taken the overall win since 2003, eleven years later it scores a one-two-three-four. The No. 6 Muscle Milk/Pickett Racing ORECA-Nissan 03 scored fifth place, the top LMP2 finisher.
The Prototype Challenge class win went to the No. 54 CORE Autosport team of Colin Braun, Jon Bennett, Mark Wilkins and James Gue.

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.