2007 Bmw X5 4.8i Sport Utility 4-door 4.8l 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 pondering hardcore M4 to celebrate 100 years?

2013 is the year for Lamborghini, Aston Martin and the Porsche 911, but 2016 will be the year for BMW. That's when the Munich-based maker of the Ultimate Driving Machine will celebrate its 100th birthday, with what will probably be a year-long celebration. Part of that 365-day party will, reportedly, be an even hotter version of the new BMW M4, which is set to debut in January at the Detroit Auto Show.
Yes, according to Australia's Car Sales, the über-M4 has been hinted at by higher-ups at BMW's M division, who claim the rear seats will be removed, much like the M3 GTS, while other weight-saving measures will be used to try and bring the M4's weight below 3,000 pounds. There's no mention of engine mods, but if the M4's biturbocharged six is as good as we think it'll be, that's not a deal-breaker for us.
The lightening process on the so-called M4 GTS would involve replacing the hood and front fenders with parts made of carbon fiber, while the doors would switch from steel to aluminum. Besides the deletion of the rear seats, Car Sales is predicting lightweight racing buckets, with a carbon-fiber shell and a minimal amount of padding. Expect lots and lots of Alcantara, in place of leather.

BMW adds on-street parking to DriveNow carsharing in SF

BMW is putting a new spin on the concept of the San Francisco treat. The German automaker cut a deal to clear out 80 street-parking spaces for its DriveNow car-sharing program in the notoriously parking-constrained City by the Bay. Bimmer is also more than doubling its all-electric ActiveE car-sharing fleet in San Francisco to 150 vehicles from 70. Starting later this month, customers will be able to access the DriveNow website or app to find, reserve and park the electric Bimmers on certain streets in San Francisco's Mission district. Once the car is ready to be turned back in, the vehicle's in-car screen will also indicate what "drop-off" zones the driver can use to end the reservation. It's all very high-tech, and BMW is looking to expand the program to other San Francisco neighborhoods like Bernal Heights, the Haight, Noe Valley and Potrero Hill. There's also a contest for users to name the 80 new vehicles, but it involves a really complicated lettering system. "New" here means new to DriveNow, since these ActiveE electric vehicles are really those that were, until recently, used by the Electronauts in BMW's EV leasing program. Since those leases are ending, the cars need to go somewhere. We think carsharing is a great home for them. BMW, which also runs DriveNow in the German cities of Berlin, Hamburg, Cologne, Munich and Dusseldorf, said in March that it was looking to add the service to as many as 15 more cities in Europe as well as another 10 in the US. BMW debuted DriveNow in San Francisco in August 2012, though parking the cars has always been an issue. Check out BMW's press release below. BMW Group's DriveNow Car-Sharing Service Expands to Street Parking in San Francisco. San Francisco Mayor Ed Lee and BMW Group board member Dr. Ian Robertson provided details about DriveNow at a news conference on ... Eighty All-Electric BMW ActiveE Vehicles Added to the DriveNow Fleet to Increase the Convenience of Finding and Parking Emission-Free Cars. San Francisco, CA – May 8, 2014... BMW Group subsidiary DriveNow, a flexible, premium car-sharing program, will expand to offer street parking in multiple neighborhoods in San Francisco, beginning in select areas of the Mission District and will add 80 electric BMW ActiveE vehicles to the existing fleet, increasing the total number of ActiveE vehicles in the San Francisco Bay Area to 150. DriveNow members will have the opportunity to name the 80 electric vehicles in a two-week social media challenge.