2021 Bmw X3 M Awd Competition & Executive Pkgs Matte Wrap 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.

Recharge Wrap-up: BMW X5 PHEV debuting in Shanghai, Proterra sets up shop in CA

South Carolina-based Proterra has received funding to build electric buses in California. The California Energy Commission has awarded the company, which is headed by former Tesla executive Ryan Popple, a $3-million grant. Proterra will use the funds for a facility in the LA suburb the City of Industry, where its largest customer, Foothill Transit, also operates. Proterra has also opened an office in San Bruno, just south of San Francisco. Read more at SFGate or at ValueWalk. Despite its "urban mobility" design, the BMW i3 has become popular outside of large cities. Rather than singular urban centers, "The strongholds in this country are parts of California, Texas and southern Florida," said BMW North America CEO Ludwig Willisch. He also says the electric car hasn't been particularly successful in the Northeast, with cities like New York perhaps not being as mindful of sustainability as California. BMW is also nearing i3 sales of 12,000 a year, which Willisch calls "a sustainable rate." Read more at Automotive News. BMW will debut its X5 xDrive40e plug-in hybrid at the Shanghai Motor Show this month. It is the first PHEV from BMW's core brand (not from its i sub-brand). It uses a turbocharged four-cylinder engine and electric motor for a total of 313 horsepower, and a combined fuel economy of about 70 miles per gallon (according to the ECE test cycle). Press days for the Shanghai Motor Show are April 20-21. Read more in the press release below. BMW at Auto Shanghai 2015. At a glance •BMW at the 16th International Automobile & Manufacturing Technology Exhibition (Auto Shanghai) from 22 – 29 April 2015 (Press Days from 20 – 21 April). •BMW presents a world premiere, four Asian premieres and two Chinese premieres in Shanghai. •World premiere: the BMW X5 xDrive40e Sports Activity Vehicle is the first plug-in hybrid series-production model from the BMW core brand. •Asian premiere: the new BMW 2 Series Gran Tourer is the first premium model in its segment to offer maximum variability and room for up to seven people. •Asian premiere: the new edition of the BMW 1 Series is even more expressive, sporting and efficient than before. •Chinese premiere for the three athletes in the luxury class: the new BMW 6 Series Convertible, the new BMW 6 Series Coupe and the new BMW 6 Series Gran Coupe. •Chinese premiere with top-notch driving dynamics, efficiency and exclusivity: the new BMW M6 Coupe and the new BMW M6 Gran Coupe.

BMW i8 with 500+ horsepower in the cards?

While BMW makes plenty of machinery to keep enthusiasts interested, its most enticing models are often based on more ordinary ones. That's what made the arrival of the i8 so captivating, emerging as the first stand-alone BMW sports coupe since the M1. But if its dual purpose - trying its best to both embrace the earth and traverse it rapidly - somehow left you disappointed, the next development could prove to fix that.
According to Automobile, BMW is working on a more potent i8S model. The hardcore version of the hybrid sports car would offer more power and a stiffened chassis to make it that much more aggressive. The Bavarian automaker is reportedly still evaluating two potential powertrain options: The first would pair a 2.0-liter twin-turbo four-cylinder good for 320 horsepower to an electric motor with another 204 hp. The second would use a 3.0-liter straight six with 480 hp and an electric motor with 109 hp. Both would be mated to a nine-speed dual-clutch transmission and an integrated starter motor packing an extra 27 hp.
Either way, we'd be looking at a combined output well in excess of 500 horsepower - far more than the existing i8's 228-hp turbo three and 129-hp electric motor - dropping the 0-62 time down from 4.1 seconds to an estimated 3.5. Couple that to a more advanced carbon chassis, wider tires and other goodies, and the i8 would be transformed into a far more capable performance machine than it already is.