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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.

What hardcore 911 is Porsche working on now?

Porsche has been spotted testing a new hardcore version of the latest 911. The prototype appears to blend the best elements from the recently facelifted 991.2 with those of the outgoing GT3 RS, which both follows logically and bodes well for the German automaker's latest track-focused performance machine. That means new lighting and other touches, but also more ventilation than a toxic chemicals facility. The bigger question, however, is what engine Porsche is hanging off the back. If history teaches us anything, we could be looking at one of several possibilities. For one, this could be a prototype for the updated 911 GT3 RS, carrying a modified version of the existing model's 4.0-liter flat-six, still naturally aspirated, but maybe with a few extra horses kicked in over the outgoing version's 500 hp. For another, it could follow in the footsteps of the previous limited-edition GT3 RS 4.0, but since the existing model already boasts that displacement, this one could go a step further at 4.2 liters. But then it might not be a GT3 at all: we could be looking at the rebirth of the GT2, the primary difference between the two being the absence or presence of turbochargers. Porsche hasn't done a forced-induction GT model since the GT2 RS of 2010, and that was essentially a 911 Turbo sans the all-wheel drive and any shred of sanity. Whatever is lurking under all that aggressive bodywork, we're looking forward to finding out. And we get the distinct feeling that it won't disappoint. Related Video: Featured Gallery 2017 Porsche 911 GT2/GT3 RS: Spy Shots View 14 Photos Image Credit: CarPix Spy Photos Porsche Coupe Performance porsche 911 gt3 porsche 911 gt2 rs

Get lost in Evo's sublime 2013 Car of the Year testing

Every year Evo stages its Car of the Year test, bringing the best performance cars in the world to one location for an epic shootout. This year the magazine pitted eight CotY finalists against each other on Route Napoleon in Southern France - Evo claims it's the "best road in the world" - and then proceeded to nitpick the smallest of faults on each car until the winner could be named. You see, this year's lineup of machines was just so good that only one car obviously wasn't CotY material from the get-go. Can you guess which one judging from the list below?
- Aston Martin V12 Vantage S
- Audi R8 V10 Plus