1999 Carrera 4 Used 3.4l H6 24v Manual Convertible 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.

2017 Porsche Panamera wagon spotted on Nurburgring

Back in February we showed you spy photos of a Porsche Panamera wagon that suggest the body style is slated for production. With the same car (or a nearly identical test mule) now running on the Nurburgring, we're ready to say the Porsche Panamera Sport Turismo is real. The name comes from a concept shown at the 2012 Paris Motor Show. It's not confirmed whether the Sport Turismo badge will be the official name for this model. We've seen spy photos of the standard Panamera hatchback, and both it and the wagon shares similar body panels. Expect to see the new 2017 Porsche Panamera at Paris this year with new or updated V6 and V8 engines as well as a plug-in hybrid option. The new Panamera is based off the MSB platform that Porsche is leading development on. As we reported previously, the next big Porsche could come as a coupe variant as well. Autocar also reports that the MSB platform will underpin future Bentley models, and the next Audi A8 (or A9 coupe) will probably share the same architecture. Before you bemoan the shared platform as some kind of brand dilution, remember that Porsche claims the Macan SUV shares only one-third of its parts with the Audi Q5. That is, the brands in the VW maintain a lot of differentiation despite common underpinnings. Or to put it another way: if you're going to make a knee-jerk complaint about Porsche, keep it to the standard cliches about making too many SUVs or how the Panamera isn't pretty. But to go back to the wagon seen above, at least the boxy tail lends some elegance to the Panamera's generous dimensions. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Featured Gallery 2017 Porsche Panamera Sport Turismo Wagon Spy Shots View 9 Photos Spy Photos Paris Motor Show Porsche Wagon Luxury porsche panamera sport turismo

The List: Best of Scenic Drives

The List hosts Jessi Combs and Patrick McIntyre have gone on some incredible scenic drives throughout the series, including a drive through the Italian Alps, a cruise on the Pacific Coast Highway, and winding their way across the Tail of the Dragon. Here's a look back at some of our favorite moments of scenic driving. If you like what you see, stay tuned to watch the full episodes, or click here to go directly to our episode archive and pick out some of your own favorite moments of The List to revisit. The List #0100: Drive the Italian Alps The List #0567: Drive The PCH The List #0011: Drive the Tail of the Dragon Have an RSS feed? Click here to add The List. Click here to subscribe to The List in iTunes. Click here to learn more about our hosts, Jessi and Patrick. Bentley Maserati Porsche Driving Convertible The List Videos Original Video