2004 Bmw X3 3.0i Sport Utility 4-door 3.0l on 2040-cars

Auto blog

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 M850i Convertible, VW Tiguan and Easter Jeep Safari concepts | Autoblog Podcast #669

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Consumer Editor Jeremy Korzeniewski. This week, they've been driving the BMW M850i xDrive Convertible and VW Tiguan. In the news, Peugeot isn't coming to the U.S. after all, Harley-Davidson has a CPO program, Jeep teased some Easter Safari concepts and Kia's got a big fire problem. Finally, they help a listener choose a replacement for a Nissan 350Z in the "Spend My Money" segment. Autoblog Podcast #669 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars We're Driving 2021 BMW M850i xDrive Convertible 2021 Volkswagen Tiguan News Peugeot's U.S. return officially canned as Stellantis doubles down on Alfa Romeo Harley-Davidson launches CPO program to entice younger buyers Jeep teases 'Magneto' and other concepts for Easter Jeep Safari Kia tells 380,000 more owners to park their cars outside due to fire risk Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related Video: Green Podcasts BMW Jeep Kia Peugeot Convertible Coupe Crossover Motorcycle SUV Concept Cars Electric Luxury Off-Road Vehicles Performance

BMW M3 gets the video retrospective treatment

With BMW on the cusp of pulling back the sheets on its next-generation M3 (or should we say, M4?), the crew from Electric Federal has taken it upon themselves to give us a generation-by-generation look at the evolution of the most renowned of BMW's sports coupes. The video below features plenty of beautiful shots of each generation of M3, starting with the ever lust-worthy E30 before finishing up with the current iteration. BWS Motorsport's Mark Norris provides the narration, complete with a brief synopsis of what makes each generation so special.
As usual, the clip is fit for big-screen viewing. You can watch the action below for yourself. Meanwhile, we'll be busy figuring out which vital organs we can sell to get our hands on our own E30 M3.