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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.

Dan Gurney, legendary all-American racer, dies at 86

American racer Dan Gurney, who raced and won in Formula One, the 24 Hours of Le Mans, IndyCar and NASCAR in the 1960s and who started a trend by spraying champagne on the victory podium, died in California on Sunday. He was 86. The news was announced by his wife, Evi, and family in a statement. "With one last smile on his handsome face, Dan drove off into the unknown just before noon today, January 14, 2018," they said. "In deepest sorrow, with gratitude in our hearts for the love and joy you have given us during your time on this earth, we say, 'Godspeed.'" The family said Gurney, whose Formula One career spanned one of the most glamorous and dangerous periods of the sport's history from 1959 to 1970, had died of complications from pneumonia. He won seven IndyCar races, five in NASCAR and four in F1, placing second twice in the Indianapolis 500. He raced in multiple series concurrently throughout much of his career. He was the first of just three drivers to win races in four series — sports cars, Indycars, Formula One and NASCAR. The feat was later replicated by Mario Andretti and Joan Pablo Montoya. At the height of his popularity, in 1964, Car and Driver promoted the idea of electing him president. He retired from racing in 1970 but returned for a NASCAR race in 1980. Between 1965 and 2012, his All American Racers, which he founded with Carroll Shelby and Goodyear, built 158 race cars and is the only constructor to have built a winning F1 Grand Prix car, a winning Indy 500 car and a winning Sports Car. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Reporting by Alan Baldwin Featured Gallery Dan Gurney obituary View 20 Photos Motorsports Ferrari Ford Porsche IndyCar dan gurney

Porsche CEO outlines Cayenne diesel US repair proposal

Porsche has announced a plan to fix the emissions issue on the Cayenne with the 3.0-liter diesel V6, and it includes a software update and the replacement of the catalytic converter on some early examples, according to Reuters. The company believes these repairs are enough to make the SUVs emissions compliant, but the automaker's proposal still needs approval from the Environmental Protection Agency and California Air Resources Board before it can implement a recall. This authorization could come by the end of January. Note that the proposed 3.0-liter TDI plan is separate from the 2.0-liter TDI fix that was rejected by CARB on Tuesday. There are around 13,000 Cayennes on the road that the company needs to repair. Models from 2013 and 2014 would require a new catalytic converter and a software update, but those from 2015 and 2016 would just need the new software. "The technical aspects have all been submitted, we will wait whether there will still be proposals for corrections by the Americans," Porsche CEO Oliver Blume said to Reuters. He wasn't sure how long the repair process would take, but suggested less than half of the affected examples would require the upgraded exhaust hardware. Blume indicated to Reuters that Audi actually created this repair plan. The EPA first issued a violation notice against the 3.0 TDI in early November and later broadened it to around 85,000 vehicles from the 2009-2016 model years, including diesel examples of the Cayenne, Volkswagen Touareg, Audi A6, A7, A8, Q5, and Q7. Audi later admitted the engine contained previously undisclosed auxiliary emission control devices. CARB gave the automaker 45 days to come up with a recall proposal to fix the 15,000 affected models in the state. Related Video: