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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.

Hoons off-road in a lowrider Monte Carlo in latest Roadkill video

Specialization keeps the automotive world interesting because it creates all sorts of fun niches. For example, if you like hot rods, you can dive deep into the world of rat rods or just focus on cars with a more traditional look. In some cases the myriad styles don't mix very well, of course, and the folks at Roadkill are proving that on video by attempting to take a lowrider Chevrolet Monte Carlo from Los Angeles to Las Vegas on dirt. As you might expect, forcing a lowrider off-road doesn't go well, but the stunt makes for a great chronicle of dumb, automotive fun. Other than some repairs to get the Monte Carlo roadworthy, the only modification here is a set of knobby tires to achieve at least a modicum of traction on the loose rocks. Although, no matter what they do, at the even lowest speeds the hosts inside are still bounced around like they're in an inflatable castle at a kid's birthday party. Still, the guys are clearly amused by it all.

Can DARPA hack into a Chevy Impala through OnStar?

An ex-video game wizard named Dan Kaufman tracked a circuitous route to becoming the head of the Software Innovation Division at the Defense Advanced Research Projects Agency. DARPA normally makes these pages because of its work with autonomous vehicles and automobile technology that overlaps with military applications, but for the past five years Kaufman and his multiple research teams have been working on creating unhackable software code that could be used in military drones. Part of that work has involved hacking into just about everything else, and as a segment on 60 Minutes reveals, that includes cars. The masterminds discovered a way to hack into OnStar, the General Motors telematics system. After figuring out how to hook into OnStar's emergency communication system, they overwhelmed it with data. While the computer was busy trying to manage the overrun of data, the research team inserted code that took control of the sedan's other computers, giving it control. So while reporter Leslie Stahl tooled around in a parking lot, a DARPA researcher with a laptop would occasionally take control of the car, like by applying its brakes or, conversely, removing the ability for Stahl to use the brakes. Hacking into vehicles has been in the news for years: Car and Driver ran a feature on the various ways cars could be hacked in 2011, two hackers released a car-hacking code at the hacker-fest Defcon in 2013 and demonstrated how it worked on a Toyota Prius and Ford Escape, and German researchers demonstrated how they could hack into BMW's Connected Drive remote-services system last week via an attack on the cars' telematics units. This isn't about GM or Onstar or the future; hacking into cars of all kinds isn't coming, it's here, and it doesn't take the half-billion-dollar annual budget of a small DARPA division to do it. Check out the 60 Minutes video on the CBS site (you can watch the entire video from a mobile device without logging in). The OnStar hacking starts at 6:45, but it's worth watching what leads up to that. News Source: Jalopnik Chevrolet Safety Technology Infotainment Autonomous Vehicles Videos Sedan hacking 60 minutes