2003 Porsche 911 Turbo 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.

Xcar tests Cayman GT4, wonders if it's finally knocked off big brother

Should you buy a Porsche Cayman and save a whole butt-load of money, or just get a 911? That question, friends, has never been as difficult to answer as it is today, where you can get a Cayman that not only undercuts its big brother on price, but in many ways, delivers a better driving experience. Of course, we're talking about the Cayman GT4, a car that pilfers the old 911 Carrera S 3.8-liter, flat-six engine and the GT3's adaptive suspension system and carbon-ceramic brakes. Not only does it borrow from big brother, but it's arranged in what some might argue is a more logical manner, parking that naturally aspirated boxer smack-dab in the middle, rather than at the back like the 911. Oh, and the manual-only GT4 is only a tenth slower to 60 than the new, turbocharged Carrera S, but has a starting price that's $18,800 lower. Yes, you read that correctly, the GT4 is a Ford Focus less than the standard-bearing Porsche. Naturally, Xcar keeps all this in mind as it tests the GT4, a vehicle that it comes to a rather interesting conclusion about. Of course, we won't spoil that for you, so head on up and check out the entire test, as Xcar's Alex Goy tests out what may well be a genuine alternative to the 911. Related Video:

Porsche reveals new 911 GT3 R at the Nurburgring

On any given weekend, you're bound to find gaggles of Porsche 911s zipping around most any race track. Now Porsche has revealed its latest competition model at no less fitting a location than the Nurburgring. The new 911 GT3 R replaces the existing version, slotting in below the 911 RSR. It's based closely on the road-going 911 GT3 RS, and retains the same 4.0-liter naturally aspirated flat-six with direct injection and variable valve timing, but tuned to deliver over 500 horsepower, transmitted to the rear wheels through a six-speed sequential paddle-shift gearbox and mechanical limited slip differential. The wheelbase has been stretched over three inches for better weight balance compared to the outgoing GT3 R, further optimized by more lightweight components and a central radiator to lower the center of gravity. The lightweight bodywork is made of aluminum, steel, and carbon fiber, and for the first time all of the glass (including the windscreen) has been replaced by plexi. Stopping power is provided by six-piston aluminum monoblock calipers gripping 380-millimeter steel discs up front, with four-piston calipers and 372-mm discs at the back. The safety fuel cell can now hold 120 liters of fuel with a cut-off safety valve, the doors and windows can be removed, and the escape hatch is bigger, too. All of this adds up to the promise of a more competitive GT3 R ready to take on the competition, available to privateer racing teams from December for 429,000 euros before tax – working out to about $487k at current exchange rates. World premiere at the Nurburgring Lighter, more economical, faster: the new 911 GT3 R Stuttgart. Based on the 911 GT3 RS production sports car, Porsche has designed a customer sport race car for GT3 series around the world: The 911 GT3 R. In developing the more than 368 kW (500 hp) racing nine-eleven, special attention was paid to lightweight design, better aerodynamic efficiency, reducing consumption, improved handling, further optimised safety as well as lowering service and spare parts costs. Adopted from its production sibling, the 911 GT3 R features the distinctive double-bubble roof, and the wheelbase which had been lengthened by 8.3 centimetres compared to the previous generation. This ensures a more balanced weight distribution and more predictable handling particularly in fast corners corners in comparison to the previous GT3 R.