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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.

Jay Leno takes an in-depth look at a 1964 Porsche 356C restomod

Look nearly anywhere at Dr. Anand Rajani's 1964 Porsche 356C, even the engine, and you would never realize that it boasts around 50 percent more power than stock. There's no sign of any other mods to make the drive a bit more modern, either, but they're there. The car's invisible upgrades result in an amazing transformation of a car that started out pretty great to begin with, and Jay Leno can't seem to get enough of driving this beautiful, gray coupe with restorer John Willhoit. Before going for a drive, Leno takes a deep dive into the details of this Porsche's modifications, particularly of its engine. The result of all the work is a mill that looks visually stock but actually boasts a significant jump in displacement. Willhoit admits this is particular one is a fairly conservative build but output still reaches 145 horsepower and 145 pound-feet of torque. If you're worried that Jay's CNBC show might have a detrimental effect on the quality of the Jay Leno's Garage YouTube video series, then here's your answer. For vintage Porsche fans interested in the nuts and bolts of making them even better, it's hard to imagine Leno making a better clip than this one.

Prosecutors in Argentina wants Top Gear to stand trial

Jeremy Clarkson may have left Top Gear behind, but some of his actions on the show may come back to haunt him. Prosecutors in Argentina reopened a criminal case against Clarkson last week, which may result in a prison sentence, over last year's now infamous insulting license plate incident, the Telegraph reported. Top Gear, and Clarkson in particular, had a reputation for going out of their way to insult other cultures. Clarkson was already on notice for racist remarks and social media posts when he punched a producer, ending his career at the BBC. So it was not a huge surprise when the team ran into trouble in Argentina while filming a 1,400-mile road trip for the show's 2014 Christmas special. Now for the history; Argentina and England have a long running disagreement that goes all the way back to the age of empire. At various times, a small set of islands off the coast of Argentina, called the Falklands, have had French, British, Spanish, and Argentine settlements. Britain claimed for their own in 1833. In 1982, Argentina and Britain fought a short, bloody war over the islands. Britain emerged victorious and still holds the islands to this day, though Argentina still claims them. Enter the Top Gear lads and their cars. Clarkson was driving a Porsche 928 with a license plate reading H982 FLK. Producers for the show deny up and down that the plates were not intended to cause such ire. Intentional or no, residents took the plate as a jab at the country's defeat in 1982. First, Clarkson was banned from the city where the road trip was supposed to wrap up. Then, angry Argentines threw stones at the hosts, forcing Top Gear to abandon filming and flee the country. In April, a judge deemed the plates intentionally disrespectful and blamed the show for causing a riot. Now the case is being reopened in Argentine courts, partly at the urging of veterans from the Falklands War. Prosecutors are saying that Top Gear changed the Porsche's plates with full knowledge that such actions were illegal. The case could take years to wind its way through the court system and drag all three Top Gear presenters in front of a judge. At the end, if found guilty, Clarkson could face three years in an Argentine prison.