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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.

Car technology I'm thankful and unthankful for

The past few years have seen a surge of tech features in new vehicles — everything from cloud-based content to semi-autonomous driving. While some of it makes the driving experience better, not all tech is useful or well thought out. Automakers who are adept at drivetrains, ride quality and in-cabin comforts often fail at infotainment interfaces and connectivity. From testing dozens of vehicles each year and in the spirit of gratitude, here are three car tech features I'm thankful — and a trio I could live without. Thanks Connected search: This seems like a no-brainer since everyone already has it on their smartphones, but not all automakers include it in the dashboard and as part of their nav systems. The best ones, such as Toyota Entune, leverage a driver's connected device to search for a range of services and don't charge a subscription or require a separate data plan for the car. I also like how systems like Chrysler Uconnect use Yelp or other apps to find everything from coffee to gas stations and allow searching via voice recognition. Apple CarPlay and Android Auto: It took two of the largest tech companies to get in-dash infotainment right. While they have their disadvantages (you're forced to use Apple Maps with CarPlay, for example), the two smartphone-integration platforms make it easier and safer to use their respective native apps for phoning, messaging, music and more behind the wheel by transferring a familiar UI to the dashboard — with no subscription required. Heated seats and steering wheels: I really appreciate these simple but pleasant features come wintertime. It's easy to get spoiled by bun-warmers on frosty mornings and using a heated steering wheel to warm the cold hands. I recently tested a 2018 Mercedes-Benz E400 Coupe that also had heated armrest that added to a cozy luxury experience. Bonus points for brands like Buick that allow setting seat heaters to turn on when the engine is remotely started. No thanks Automaker infotainment systems: Automakers have probably poured millions into creating their own infotainment systems, with the result largely being frustration on the part of most car owners. And Apple CarPlay and Android Auto coming along to make them obsolete. While some automaker systems, such as Toyota Entune and FCA's Uconnect, are easy and intuitive to use, it seems that high-end systems (I'm looking at you BMW iDrive and Mercedes-Benz COMAND) are the most difficult.

Recharge Wrap-up: drifting Nissan Leaf video, BMW i sponsors Formula E Berlin ePrix

Watch a Nissan Leaf drift. The folks at Autocar got their hands on Nissan's otherwise tame electric vehicle with a set of plastic rear tires, and got it sideways at the British Drift Championship. If that sounds ridiculous, well, it is, but it's also enormously entertaining. If it sounds particularly tricky to pull off in the front-drive EV, yeah, it's that, too. Check it out the drifting Leaf in the video above, and read more commentary at Hybrid Cars. BMW's i division is the title sponsor of the 2016 Formula E Berlin ePrix. The German automaker, which has already put the i8 and i3 to work as safety and medical cars for the electric racing series, is "delighted to be prominently represented with BMW i at the race weekend in the German capital," according to Joerg Reimann, BMW's Vice President of Brand Experience. The 2016 FIA Formula E BMW i Berlin ePrix - as it is now officially titled - takes place on May 21. Read more from Formula E. A Hawaiian biodiesel plant is the first in the US to be certified as sustainable. Pacific Biodiesel's Big Island Biodiesel plant gets its certification from the Sustainable Biodiesel Alliance, covering both the plant's production and distribution of the alternative fuel. The facility uses waste oil, including used cooking oil, to produce its fuel. The certification system is designed to help worthy biofuel producers show that their processes and products are more than just greenwashing. Read more at Utility Dive, or from The New York Times. India's KPIT Technologies has earned the Promising Innovation in Transport Award at the 2016 Summit of the International Transport Forum in Leipzig, Germany. KPIT earned the special recognition for its system to convert diesel buses to all-electric power. The company's retrofits can be applied to a wide variety of bus platforms. Read more at Green Car Congress.