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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 recalls diesel X5 models over fuel filter heater

BMW has announced that it is recalling 1,540 examples of its 2009 and 2010 X5 xDrive35d crossovers produced between June 13, 2009 and November 9, 2009.
According to the National Highway Traffic Safety Administration, the model's fuel filter heater, which warms up the diesel fuel at low outside temperatures, can experience an electrical overload condition that may cause it to become permanently activated. This means the fuel filter heater could remain activated even when the ignition is off, which could lead to a dead battery. It could also lead to overheating, possibly resulting in a fire.

BMW i8 added to exotic Dubai police fleet

Apparently the Dubai Police is ready to start expanding its vast collection of exotic cars yet again. After taking a little while off from new purchases, the cops there recently added a Lexus RC F to the stable, and now the force has gone green – well, kind of. The latest high-performance vehicle to wear the green and white livery is a BMW i8. While the video above isn't in English, the clip is self-explanatory by showing off officials getting out of the high-performance hybrid coupe and taking a walk around it. With a total output of a mere 357 horsepower, the i8 is practically the economy entry in the Dubai Police fleet that includes a Bugatti Veyron and McLaren MP4-12C. Pics: #BMW i8 joins #DubaiPolice fleet of Super Patrol #Cars. @BMW #BMWi8 #Dubai #MyDubai #UAE #Police #Luxury pic.twitter.com/u0WK16g6B0 - Dubai Police???? ??? (@DubaiPoliceHQ) March 11, 2015 Related Video: Related Gallery Dubai Police BMW i8 News Source: Twitter, ArabGT.com via YouTube Auto News Green BMW Coupe Hybrid Videos dubai dubai police