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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.

Why are all US-bound BMW i3 EVs with range extenders stuck at port?

The first BMW i3 EVs have been delivered in the US, but in a quirk of the rules, none of them have been the range-extended versions. Long-time BMW electric vehicle driver Tom Moloughney discovered this fact the hard way. His i3 REx has been sitting at a New Jersey port for over a week and he's getting impatient. The problem is something Moloughney calls a "Monroney Hold." So, instead of sitting there fuming, Moloughney did a bit of research and discovered that the problem is something he calls a "Monroney Hold." He says that "the EPA certification has not been completed so BMW doesn't have a Monroney label (window sticker) to post in the window before the car leaves the port, which is required by law. The range extender option changes (shortens) the car's electric range, and also requires an official MPG rating so BMW couldn't use the same Monroney label as they did for the all electric i3." You can read more on his website, but it turns out that the story isn't so simple. For one thing, the EPA testing has been finished. Washington State representative Chad Magendaz told Moloughney that he asked the EPA for an official statement and got the following from Linc Wehrly, Director of the Light-Duty Vehicle Center Compliance Division: "EPA tested the i3 REx and provided the results of that testing to BMW on May 13th. EPA is not aware of anything that would prevent BMW from importing the vehicles since May 13th." Then there's the official word from BMW. Spokesman Dave Buchko told AutoblogGreen that: We are moving as quickly as possible to release the first BMW i3 Range-Extender models to BMW i Centers. Receipt of test data from the EPA is one step, but not the final step, in the process of receiving certification from the EPA. Rules do not permit the release of vehicles for sale until EPA labels are finalized, produced and affixed to any vehicle. Barring any unforeseen delays, we expect that to happen by the end of this week. We have never certified a vehicle like this before. We are taking every precaution to make sure that everything is done in a timely, but more importantly correct manner. In that Monroney labels cannot be produced until the EPA certification process is complete, the characterization [of a "Monroney Hold"] is not technically incorrect, but there is more to it than that, as is often true in life. On a lighter note, BMW donated a loaded i3 to Brad Pitt's Make It Right charity foundation as a fundraiser. Read about that below.

BMW pays tribute with Z4 racing livery

Whether it's from Martini or BMW, there's something that makes us a little weak in the knees when we see a racing livery of dark blue, light blue and red stripes over white. Like the one on this BMW racer that will compete at Sebring next weekend. Presented alongside its spiritual predecessor at Amelia Island this weekend, this BMW Z4 GTLM has been decked out in a throwback version of the Bavarian automaker's iconic color scheme. It's a tribute to the BMW 3.0 CSL that scored the marque's first victory at the legendary Floridian endurance race 40 years ago and even wears the same number 25. It's as good a reason as any to bring back a racing livery we love, but then we'd probably take just about any occasion to appreciate it anyway. 40 years after the first win in Sebring: BMW presents anniversary design of the BMW Z4 GTLM for the 12-hour race. Munich (DE), 14th March 2015. On 21st March, BMW Team RLL will contest the 63rd staging of the legendary 12-hour race of Sebring (US) in the US state of Florida. The endurance classic is also the second race of the 2015 United SportsCar Championship (USCC). BMW Motorsport and BMW of North America celebrate a special anniversary on their return to Sebring this season: 40 years ago, BMW Motorsport got its first Sebring victory, with the BMW 3.0 CSL. In honour of that success, the two BMW Z4 GTLMs of BMW Team RLL will sport special designs as they compete on the "Sebring International Raceway". Car number 25 will carry the colours of the winning BMW 3.0 CSL of 1975. At an unveiling ceremony, which was part of the "Amelia Island Concours d'Elegance" in northern Florida, BMW of North America presented the anniversary design of the vehicles to the public for the first time. Many of the successful heroes of that time took the opportunity to attend the presentation. Forty years after the historic victory, then winners Brian Redman (US), Sam Posey (US) and Hans-Joachim Stuck (DE) were reunited on Amelia Island. Jochen Neerpasch, the first managing director of BMW Motorsport GmbH, and BMW Motorsport Director Jens Marquardt were also among the guests. They all had front row seats as current BMW Team RLL driver Bill Auberlen (US) completed the first presentation laps in the BMW Z4 GTLM with the anniversary design. 1975 was a significant year in the history of BMW in North America: BMW of North America was founded, and just a few days later came the historic first victory with the BMW 3.0 CSL in Sebring.