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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.

Porsche 911 GT2 test mule caught in the snow

This may look like a weird, cobbled-together Porsche, but insiders tell us we're actually looking at the forthcoming GT2. Maybe even a GT2 RS. Those schooled in the intricacies of Zuffenhausen nomenclature will be suitably excited by now. But for the rest of us, the GT2 (with or without the RS) represents the pinnacle of the most hardcore 911s. It's essentially a 911 Turbo without the all-wheel drive but some other goodies thrown in – or to put it another way, it is to the Turbo what the GT3 is to the 911 Carrera. Porsche first did a 911 GT2 back in 1993 based on the 993-generation model. It then did another based on the 996, and then on the 997. But the last one we saw was the GT2 RS that came out in 2010, packing 612 horsepower channeled exclusively to the rear wheels through a six-speed manual transmission. The German automaker didn't do a GT2 version of the 991, but now that the entire model line is undergoing a transformation – and an near-complete switch to turbo power – it apparently has another one in store for us. Aside from ditching the Turbo's all-wheel drive, the new GT2 will be lighter and pack more power – as much as 700 hp, from what we hear. As you can see from the spy shots, the test mule spotted romping in the snow is also wearing larger exhaust tips and the signature GT2 RS black hood. Expect the finished product to wear its own shoes and a more extreme aero kit as well. The question on everyone's minds will be whether it will, like the latest GT3 and GT3 RS, be offered only with a dual-clutch transmission, a conventional manual, or the buyer's choice of either. We'll find out sooner or later as the most extreme of Elfens is tipped to surface late next year. Related Video:

Performance cars old and new are headed to auction at Las Vegas Grand Prix

Auction house RM Sotheby's is hosting a sale ahead of the 2023 Las Vegas Formula One Grand Prix, and most of the lots that will cross the block were designed with performance in mind. Whether you want a supercar or a Formula One car, there's a chance you'll find it in Sin City. One of the highlights from the sale in terms of rarity and price is the Mercedes-AMG Petronas W04 that Lewis Hamilton drove in the 2013 F1 season. Assigned chassis number F1W04-04, it's the team's last car powered by a naturally-aspirated V8 engine, and you're on the wrong track if you're thinking of the 4.0-liter unit that powers AMG's road cars. The engine in question is a 2.4-liter unit that develops 750 horsepower and is capable of revving to a screaming 18,000 rpm. The KERS system injects 80 additional horses into the driveline. Hamilton drove F1W04-04 in 14 of the 2013 season's 19 races, and he won that year's Hungarian Grand Prix in the car. RM Sotheby's notes that F1W04-04 is "the sole example to be sold outside of the Mercedes-Benz organization," which explains why it expects the car will sell for anywhere between $10 million and $15 million excluding the buyer's fee and a 2.5% import duty that applies to American residents. That's a lot of money, but modern Formula One cars rarely come up for sale. Several other cars are expected to sell above the $1 million mark, including a 1999 Mercedes-Benz CLK GTR ($8 million to $9 million), a 1988 Porsche 959 Komfort ($1,650,000 to $1,850,000), and a 1996 Bugatti EB110 Super Sport ($2,500,000 to $3,250,000). The 1990 Ferrari F40 GT (one of 21 units built) could bring up to $4 million. You can take home a rare, high-end classic even if you cap your budget at $1 million. How about a 1984 Lamborghini Countach 5000 S that was delivered new to Ralph Lauren and that has been in the hands of its second owner since 1986? RM expects the coupe will sell for up to $900,000. The auction house is also giving enthusiasts two distinctly different ways to spend a six-digit sum on a 30-something-year-old Mercedes-Benz. There's a 1990 190E 2.5-16 Evolution with about 3,400 original miles that could fetch up to $700,000. That's a lot to pay for a W201, but this isn't a run-of-the-mill Baby Benz: It's one of 502 examples built for homologation purposes. Alternatively, the 1989 560SEC AMG 6.0 Wide-Body could sell for up to $900,000. It's one of the most emblematic cars designed by AMG before it joined Mercedes-Benz.