1971 Porsche 911e Hotrod - Twinplugged 2.7 With 46 Pmos 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.

2015 Porsche 911 Carrera GTS [UPDATE]

UPDATE: An earlier version of this story referenced the 911's six-speed manual transmission, but of course, Porsche uses a seven-speed manual in this car. The text has been changed to reflect this. There are no fewer than 19 different models in today's Porsche 911 series. While each appeals to the enthusiast, the race-bred GT3 is the pinnacle of the automaker's rear-engined lineup. Unfortunately, and despite the GT3's racing circuit prowess, its rigid track-tuned persona is too grating for many as a daily driver. To satisfy those who put sporty driving dynamics at the top of their list, but don't want to compromise comfort, Porsche has introduced the 2015 911 Carrera GTS. Raising its performance quotient, the GTS model boasts a handful of standard features that elevate it above its Carrera S siblings. Mechanically, it features an enhanced 3.8-liter flat-six bolted into the tail of the widebody platform (shared with the Carrera 4 and GT3). Other goodies include Porsche Torque Vectoring (PTV), Porsche Active Suspension Management (PASM), a black-tipped Sport exhaust system and centerlock 20-inch 911 Turbo S wheels (five-lug wheels are a no-cost option). Cosmetically, the GTS is differentiated by its darkened lights, painted black wheels, Sport Design front spoiler, Sport Design exterior mirrors, black engine grille, rear black louvers (or lights on all-wheel drive models) and a 'GTS' logo on the lower doors. Inside the cabin are standard Sport Plus seats, Alcantera upholstery throughout with contrasting stitching, black gauges and anodized black aluminum trim. Offering us an excellent opportunity to put the second-generation GTS through its paces on a variety of roads, Porsche tossed us the keys in the LA Basin and pointed us towards Willow Springs Raceway, in the Mojave Desert. Driving Notes The GTS is offered in coupe or Cabriolet body styles, each with a choice between rear- and all-wheel drive. Buyers are also offered a choice between a traditional seven-speed manual gearbox or Porsche's seven-speed dual clutch transmission (PDK). The GT3, meanwhile, is only offered as a coupe with PDK. We grabbed the keys to a Guards Red rear-wheel drive coupe with PDK for our outbound drive, and a GT Silver Metallic all-wheel drive Cabriolet with a seven-speed manual for our return trip. Finding another 30 horsepower from the naturally aspirated 3.8-liter flat-six required some old-fashioned tricks.

Bentley tests next next-gen Flying Spur on Porsche Panamera Turbo body

At first glance, the prototype in the gallery above looks like a blacked-out version of the new Porsche Panamera Turbo. But this is actually Bentley's tester for the next-gen Flying Spur. And since the upcoming Flying Spur, among other Bentley vehicles, will utilize the same MSB platform as the new Porsche, seeing the British automaker using a Panamera makes a lot of sense. The Flying Spur is essentially a four-door version of the Continental GT, which has design cues from the EXP 10 Speed 6 concept unveiled at the 2015 Geneva Motor Show. It's safe to assume that the next-gen Flying Spur will get the same treatment as well. Other than the fender flares, the prototype is identical to the Panamera Turbo. So how do we know that this is Bentley's prototype? According to our photographers, the prototype's license plate is registered as a Bentley with the UK's Driver and Vehicle Licensing Agency. With the Flying Spur sharing the same platform as the Panamera, we expect the luxury sedan to get the same choice of engines, including the twin-turbo 4.0-liter V8 and 2.9-liter twin-turbocharged V6 engine. A concept is anticipated to come out in 2017 with a production variant coming a year later. Related Video: Featured Gallery Bentley Flying Spur Spy Shots View 10 Photos Image Credit: CarPix Spy Photos Bentley Porsche Luxury Performance Sedan bentley flying spur