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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 GTS gets Rennsport Reunion Edition

Porsche is taking over Mazda Raceway Laguna Seca this weekend to celebrate Rennsport Reunion V. In addition to some beautiful cars on display, it's giving the brand's superfans something extra special by unveiling the 911 Carrera GTS Rennsport Reunion Edition there. Limited to only 25 examples, they're exclusively for customers in North America. As the model's name implies, this special edition is mechanically based on the 430-horsepower 911 GTS, and gets a manual gearbox and PASM Sport Suspension. Porsche Exclusive then applies special styling bits to each one. For the exterior, paint is a custom shade called Fashion Grey, with black-and-red decals applied to the hood, roof, decklid, and doors. To complete the fashionable look, gloss black adorns the radio antenna, around the LED headlights, the lower part of the mirrors, and 20-inch Sport Classic wheels. The interior offers some sportiness with carbon fiber dashboard trim, a SportDesign steering wheel, and 18-way Adaptive Sport Seats Plus. A little extra flash comes from Carmine Red for the seatbelts, tachometer and much of the stitching. As a nod to the event, a Rennsport Reunion V logo is also on the center console lid. With such a low production run and a price of $149,330 with the $995 destination charge, this is a way to proclaim a serious passion for Porsche. Related Video: PORSCHE 911 CARRERA GTS RENNSPORT REUNION® EDITION DEBUTS IN MONTEREY 25/09/15 Special edition model limited to 25 units worldwide built by Porsche Exclusive Atlanta, Georgia. In honor of the fifth Rennsport Reunion®, Porsche has unveiled a special edition of the 911 Carrera GTS at this year's gathering at Mazda Raceway Laguna Seca. The Rennsport Reunion Edition is limited to 25 units worldwide and will be sold exclusively in North America. Built by Porsche Exclusive, the Rennsport Reunion Edition is based on the 430 hp 911 Carrera GTS. The limited edition production model is painted in the custom color Fashion Grey. Decorative black and red decals cover the front hood, the roof, and the rear decklid. The driver and passenger doors are decorated with black and red decals featuring the PORSCHE logotype. 20-inch Sport Classic wheels painted in high-gloss black give the Rennsport Reunion Edition a very striking appearance. The lower exterior trim of the side mirrors as well as the satellite radio antenna are also finished in high-gloss black. LED headlights in Black including PDLS Plus complete the black accents on the exterior.

24 Hours of Le Mans an on-and-off love affair

There was little usual about this year's 24 Hours of Le Mans - intermittent rain in the weeks before the race meant cars didn't get on track as much as they wanted, and intermittent rain during the race meant cars went off track a lot more than they wanted. The race started with a wet track, and one of the records broken because of the random downpours was the number of times the safety car led the field - 11 times this year - although the record of two hours and 53 minutes of lapping behind the safety car, set in 2011, was not eclipsed.
None of that served to dampen the action. With little more than an hour left in the race there were cars still only a few seconds apart fighting for position, leads still changing because of pit stops and everyone drafting anyone they could.
Things didn't go the usual way up front, either - well, not exactly...