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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.

Motor Trend first to compare Jaguar XE and BMW 3 Series

How many automakers have loaded up how much ammo and taken how many shots at the BMW 3 Series? Yet here we are, decades on and at least a decade away from the 3 Series' halcyon days, waiting for someone to give the sport sedan something beyond a flesh wound. In this most recent episode of Head 2 Head, Johnny Lieberman goes to Spain to figure out if the Jaguar XE is the sedan to do it. Here the champion wears the guise of the 335i M Sport, powered by a 3.0-liter, turbocharged, inline-six with a square 300 horsepower and 300 pound-feet of torque run through a ZF eight-speed transmission. After a short time behind the wheel Lieberman quotes from a familiar hagiography, saying it's evident "just how great this car is and why it defines the segment." The all-aluminum challenger from Jaguar comes in XES trim, meaning a 3.0-liter, supercharged V6 with 340 hp and 332 lb-ft. It uses the same eight-speed transmission as the BMW, but with different programming. According to the specs in the video, some of which are manufacturer estimates, the Jaguar is heavier, more expensive, and much thirstier at the pump. Away from the spreadsheet, Lieberman holds that the XE looks better and feels more special inside. In case you're wondering, the comparo was done before MT could get its mitts on the 320-hp BMW 340i. Lieberman says the English company spent its money on the XE suspension and it shows, but there have been other efforts from other automakers with excellent dynamic chops that weren't enough to threaten the BMW. His final assessment is that one of the two cars is awesome, and one is quite a bit better. Watch the video to find out which is which. Related Gallery 2016 Jaguar XE View 74 Photos Related Gallery 2016 BMW 3 Series Refresh View 57 Photos News Source: Motor Trend Channel via Carscoops, YouTube BMW Jaguar Luxury Performance Sedan motor trend jaguar xe head 2 head

BMW's new i DC Fast Charger will give free juice to i3 drivers

From solar chargeports to the first SAE Combo Fast Charger, BMW is offering or promoting more charging options for the i3 than most people will know what to do with. This is not a bad thing. At the Plug-In 2014 conference happening in San Jose, CA this week, BMW announced a new i DC Fast Charging unit as well as the ChargeNow DC Fast program, which is similar in some ways to Nissan's No Charge To Charge. Let's start with the chargers. Smaller and much cheaper than other DC fast chargers, an i DC Fast Charger costs just $6,548 plus installation. Remember, it was a big deal in 2011 when Nissan's DC fast charger was less than $10,000. The i DC Fast Chargers use the SAE Combo connector, so will also work in EVs from Ford, VW and Chevy and other automakers, when available. They take 30 minutes to charge an empty i3 to 80 percent full. All a driver will need in order to use the charger is a ChargePoint (or ChargeNow) card. Most of the first units will likely end up at BMW i dealers across the US. In a separate announcement, the ChargeNow DC Fast program will allow BMW i3 drivers to get free charging until the end of 2015 at participating NRG eVgo Freedom Stations. The catch is that they need to use the ChargeNow card at least once by the end of 2014. eVgo is promising to install at least 100 compatible DC fast chargers in California by the end of next year, so this should be relatively easy in at least one of the 50 states. We will have more from San Jose soon. BMW Unveils BMW i DC Fast Chargers and ChargeNow DC Fast program at Plug-In 2014. BMW i DC Fast Chargers, developed in collaboration with Bosch Automotive Service Solutions, are half the size of current DC Combo fast chargers, compatible with multiple electric vehicles and significantly more affordable. BMW i DC Fast Chargers run on the ChargePoint network giving BMW i3 drivers access with a ChargePoint or ChargeNow card. ChargeNow DC Fast enables BMW i3 drivers to charge at no cost, at participating NRG eVgo Freedom Stations equipped with DC Combo Fast Charging, through 2015. San Jose, CA/Woodcliff Lake, NJ – July 28, 2014... At Plug-In 2014, a conference dedicated to discussing key issues for the long-term success of electric vehicles, BMW of North America launched its BMW i DC Fast Chargers which can charge the BMW i3 all-electric vehicle's battery up to 80 percent in 30 minutes.