2002 Bmw Z3 2.5i Roadster 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.

First Ride: 2015 BMW M3 and M4

Getting Our Butts In The Seats
Both the non-M BMW 3 Series sedan and 4 Series coupe have so far brought much pleasure to us at Autoblog. The terrific four-cylinder 328i trim has become our favorite of the 3 Series line, while we have yet to get a chance at the 428i coupe. That said, the 35i trim powered by a 3.0-liter TwinPower Turbo inline six-cylinder engine is not exactly to be sniffed at.
We all know the ones you're really waiting for, though. The F80 fifth-generation M3 sedan and the supremely sexy F82 M4 coupe. Rumors have been buzzing for a couple of years now that the engine would be another V8, only turbocharged this time, or else a tri-turbo six. Well, today BMW confirmed that the mill under the hood's power bulge is a 3.0-liter inline six-cylinder TwinPower Turbo of the biturbo variety, referred to internally as "S55B30 variant."

How tariffs in China could cause a meltdown in the American South

While BMW is clearly a German company, the crossovers that are exceedingly important to it are actually made in Spartanburg, South Carolina. And more than that, the Spartanburg plant (physically located in the town of Greer) is where the corporate know-how and capability for those vehicles is concentrated. These are the vehicles – specifically, the BMW X3, X4, X5, X6, X7 – that drove record growth for the company in 2018, according to BMW. But whatÂ’s most notable about BMW Group Plant Spartanburg, given current events, is that according to the U.S. Department of Commerce it was the largest automotive exporter by value for the fifth year running in 2018. ThatÂ’s worth emphasizing: largest automotive exporter by value. Not GM. Not Ford. BMW. And where might one assume that more than a few of those X vehicles are shipped to? China. Some 360 miles southwest of Spartanburg is Mercedes-Benz U.S. International, Inc., in in Tuscaloosa County, Alabama. It started building vehicles in 1997. Since then, Daimler AG has invested in excess of $5.5 billion in the facility. It manufactures the crossover now known as the GLE, formerly the ML-Class. It also makes the GLE coupe and GLS. Daimler describes the Tuscaloosa facility as “the traditional home of SUV production” for those vehicles. When it reported its global 2018 sales, Daimler noted that on a global basis SUVs account “for more than a third of all Mercedes-Benz sales.” According to the Chinese finance ministry, on December 15th the Chinese government will impose a 25% tariff on automobiles (and a 5% tariff on auto parts) from the U.S. Certainly this is going to have a direct effect on the sales of vehicles that are manufactured in the U.S. and exported to China. BMW and Mercedes are going to take it on the chin for the vehicles that they make in plants that they invested in so heavily in the U.S. Which could potentially mean that people in places like Greer, South Carolina, and Vance, Alabama, are going to find themselves in the crosshairs of the combatants. Soo too could Lincoln, which produces vehicles in places like Louisville, Kentucky (Navigator), Chicago, Illinois (Aviator) and Flat Rock, Michigan (Continental). Although the Tesla Gigafactory 3 is rapidly nearing completion in Shanghai, it is worth noting that vehicles built in Fremont, California, are being sold in China in numbers that donÂ’t make Musk unhappy.