1974 Silver Porsche 914 2.0! Targa 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.

Porsche 918 Spyder pre-production version in all its almost-done glory

Porsche continues the long tease of its upcoming 918 Spyder, with the latest instantiation here at the Pebble Beach Concours, with the car presented in pre-production form to the throngs on the golf course.
Just a few days ago Porsche dropped an image of the car on its official Twitter feed. True to that leak, this 918 looks damn near what we expect the full customer version to be when it is officially debuted in Frankfurt. The neon-green brake calipers are items new to this version of the 918, and seem to be an identical color to those found on the Panamera S E-Hybrid.
When it shows up as a drivable piece, expect the Porsche supercar, with its gasoline-electric drivetrain, to be pretty insane. Horsepower in excess of 800 ponies will be available with a toe-tap, while the price of entry is expected to come within shouting distance of $850,000. A good deal for Porsche to bring the thing to Pebble then, where buyers with that kind of cash are think on the ground (and most likely wearing sherbet-colored trousers).

McQueen's Porsche 917 from Le Mans races to the auction block

Steve McQueen may have been the headline actor of the motorsport cult classic film Le Mans, but we all know who the real star was. Or rather, what: the Porsche 917. More specifically, it was the Gulf-liveried #22 - not McQueen's #21 - that won the race, making it one of the most iconic cars ever to drive across the silver screen. And now it's going up for auction.
This 1969 Porsche 917K, chassis 917-024, has a storied history both on and off the screen, even if it didn't win any (off-screen) races of note. This example was the first 917 to be campaigned in an actual race when Porsche handed it to Jo Siffert to drive against the Ferrari 312P and Ford GT40 at the Spa-Francorchamps 1000 Km race in 1969. Siffert found the early example too unstable and ultimately drove an earlier 908 to the checkered flag, but after 917-024 set the fastest time at the following year's Le Mans test day, Siffert acquired it outright.
The Swiss racing driver loaned the car to Solar Productions for use in the film, after which it returned to Siffert's collection until he was killed in an F1 exposition race at Brands Hatch in 1971. In a testament to how much he loved the car, it was 917-024 that lead the funeral procession. The car subsequently fell off the radar until it resurfaced in 2001 as one of the greatest barn finds of the new millennium. Now fully restored and resplendent in its original baby blue and orange, 917-024 is headed to the auction block at Pebble Beach where you can be sure that Gooding & Company will bring in a suitably high price for arguably the most iconic example of one of the most iconic Porsches of all time.