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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.

Infiniti teases QX Monograph concept for Pebble reveal

Infiniti is planning on showing a new concept car during Monterey Car Week called the QX Monograph. In case you lost track of time, that’s next week, as the concept car will officially be unveiled on Thursday, August 17. Infiniti is planning on holding a press conference at The Lodge at Pebble Beach where Alfonso Albaisa, senior VP of design, will present the vehicle. Infiniti says the new concept will showcase the “future direction of InfinitiÂ’s design direction.” A single teaser image gives us a glimpse of the grille and the Infiniti logo on the front. There isnÂ’t a lot Infiniti is saying about the QX Monograph yet, but weÂ’re told it features “digital piano key” lighting, bold proportions and the aforementioned double-arched grille. Of course, since itÂ’s a QX model, we should also expect it to be an SUV concept and not any other body style. Beyond the concept car, Infiniti says itÂ’s bringing never-before-seen quarter-scale design models from Nissan archives to display publicly. In total, four of these models will be shown, including the 1916 DAT 41, 1966 Prince Skyline 2000-GTB, 1970 Nissan Skyline H/T and the 1995 Nissan Skyline GT-R. Related video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Roller coaster or racecar, which pulls more Gs?

Looking for a thrill? You're not the only one. You'll find kindred spirits at airfields going up for a skydive, atop bridges and towers with bungees attached to their feet and standing in line for roller coasters at the local amusement park. But you'll also find them in the paddock at the racing circuit.
So what's the commonality? G-force. It's like gravity, only in each of these cases, it's experienced by human invention. But which activity subjects your body to the greatest amount of g-force? That's what Nissan set to find out.
Before putting them back in the cockpit, Nismo sent out two of its young hot-shoes - Jann Mardenborough and Mark Shulzhitskiy - to an amusement park in the UK with a camera and a g-force meter to find out if any of the coasters could produce as much lateral gravitational force as an LMP2 racing car. See what they found in the pair of videos, below.