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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.

BMW 4 Series configurator comes online

The best money in the world might be configurator money - you never run out of it and you can never spend it the wrong way. We hope you're ready to dip into your configurator savings account, because it's time to start speccing out the 2014 BMW 4 Series, the coupe having just arrived in the virtual world.
There are four possible opening gambits: the 428i for $40,500, the 428i xDrive for $42,500, the 435i for $46,000 or the 435i xDrive for $48,000. After you've chosen your first move, there are three trim options: the $1,400 Luxury Line that features lots of chrome and wood (shown), the $1,700 Sport Line that adds lots of gloss black and contrasting trim color and stitching, or the $3,100 M Sport that offers the M Estoril Blue hue and lots of M-division specific accessories.
Starting with the 435i xDrive and M Sport, we then added items like the 19-inch wheels ($900), the Dynamic Handling Package ($1,000), Cold Weather Package ($700), Premium Package ($2,200), Tech Package ($3,150) and the Lighting Package ($1,900) on top of any other box we could check. The total, after the $925 destination and handling charge: $66,749.

BMW i8 recalled over possible fuel leak

Some 223 examples of the 2014 BMW i8, built between May 16, 2014 and September 16, 2014, are being recalled over a potential fuel leak. A bolt used to secure a ground cable from the chassis structure to the fuel tank could have been welded improperly; if so, gas might leak from the tank. The recall began in November, so if any of you owner types aren't aware by now, you can take your i8 to the dealer for replacement of the fuel tank if necessary. A bulletin from the National Highway Transportation Administration below has more details. Related Video: Report Receipt Date: OCT 27, 2014 NHTSA Campaign Number: 14V674000 Component(s): FUEL SYSTEM, GASOLINE Potential Number of Units Affected: 223 Manufacturer: BMW of North America, LLC SUMMARY: BMW of North America, LLC (BMW) is recalling certain model year 2014 i8 vehicles manufactured from May 16, 2014, to September 16, 2014. A bolt used to attach a ground cable between the tank and the vehicle chassis may not have been properly welded during manufacturing. CONSEQUENCE: An inadequate weld of the bolt to the fuel tank could cause a fuel leak. In the presence of an ignition source, a fuel leak could lead to a fire. REMEDY: BMW will notify owners, and dealers will inspect and replace the fuel tank if necessary, free of charge. The recall began in November 2014. Owners may contact BMW customer service at 1-800-525-7417 or CustomerRelations@bmwusa.com. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.