2004 Bmw Z4 2.5i Convertible 2-door 2.5l Excellent Cond. 28,900 Origina Miles 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.

BMW showcases M2, M4 with M Performance Parts at SEMA

The halls of the Las Vegas Convention Center may be filled this week primarily with customized automobiles from one side of the Pacific or another. But that's not to say that European automakers can't come out to play too. Take these two custom rides from BMW, for example. They're each based on Munich's latest performance coupes, but taken further with the addition of extra M Performance parts. The larger, more potent, and more thoroughly revised of the two is based on the M4. For the SEMA show, the Bavarian automaker has fitted it with a carbon aero kit including new front elements, diffuser, and spoiler, as well as wing mirror caps. The side sills are done in plastic, and the grilles have been blacked out. The whole thing rides on a lowered coilover suspension, and features a new two-mode stainless-steel exhaust system with titanium silencer and carbon tips. Meanwhile, the interior is trimmed out in carbon fiber and Alcantara with new a steering wheel, shifter, pedals, and LED door projectors. The SEMA show also presents BMW with the opportunity to present its first M Performance parts for the new M2 coupe. The smaller model has been decked out with new grilles, carbon rear spoiler and mirror caps, as well as new suspension components and exhaust. The interior has similarly been done up with new control surfaces, carbon accents and Alcantara trim. Related Video: BMW at SEMA 2015. 03.11.2015 The Speciality Equipment Market Association (SEMA) in Las Vegas (Nevada, USA) is regarded worldwide as the leading trade show for customisation and sports tuning. The new products presented at SEMA to trade experts influence the entire scene and set trends. At this year's SEMA show from November 3rd to 6th 2015, BMW presents a selection of distinctively sports-oriented BMW M Performance Parts to the trade fair audience. Located on the lower level of South Hall (Stand 40247), trade fair visitors will see a BMW M Performance modified BMW M4 Coupe as well as the first BMW M Performance Parts for the new BMW M2 Coupe. What is more, the new "M Performance" inscription in dynamic technical design is to be seen on selected parts. The inscription reflects the increased dynamic flair of BMW M Performance as well as underscoring the essential functional orientation of all BMW M Performance Parts. Evidence of this is also to be seen in the new, extremely sporty parts and components with which BMW has fitted the demonstration vehicle.

BMW names new head of M division

BMW's performance division has been run by Dr. Friedrich Nitschke since 2011, developing, among other products, the new M3 and M4. But soon the good doctor will be retiring, and BMW has just named his successor.
Taking Nitschke's place as chairman of BMW M GmbH will be Franciscus van Meel (pictured at right), who until recently served as managing director of Audi Quattro GmbH - the rival outfit that makes Ingolstadt's performance models, including the R8 supercar and RS line of performance models.
Van Meel will join BMW on October 1, presumably to learn the ropes from Nitschke before the 59-year-old executive steps down at the end of the year. Back in January, Audi named Heinz Peter Hollwerweger as head of Quattro GmbH and reassigned van Meel to its Beijing R&D center, a role which evidently didn't suit him as well as creating Autobahn-storming German muscle cars.