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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.

Porsche wants you to 3D print your own Cayman

Have you got access to a 3D printer? Well lucky you, because as we're rapidly learning, the possibilities are virtually endless. And if your tastes lean towards the automotive (as we'd assume they do if you're reading this page), we've got good news.
Porsche has just released 3D printing data for the Cayman S so you can three-dimensionally print out your own and customize to your heart's content. Now Porsche hasn't specified just to what scale the data will allow you to print your Cayman, but we have a feeling that'd mostly be limited by the size of the printer at your disposal. Check it out in the video below and follow the link to the Porsche site to download the file.

Porsche rules out Macan, 911 hybrids

Believe it or not, between the 918 Spyder, the Cayenne and the Panamera, Porsche offers more plug-in hybrid models than any other brand. Yes, Porsche. But don't expect that trend to continue. At least, not in the immediate future.
According to Top Gear, the E-Hybrid powertrain in the Cayenne and Panamera is too big to fit into the smaller Macan. A future hybrid system could be small enough to fit, but with the current technology still fresh, that'd still be some ways down the twisting road.
It stands to reason, then, that if the system wouldn't fit in the Macan, it wouldn't fit in the Boxster or Cayman, either. But what of the 911? Surely Porsche would like to stick it to BMW and its new i8, and proved it could do a hybrid 911 when it rolled the GT3 R Hybrid (pictured) out onto the race track over four years ago. But Zuffenhausen is reportedly in no rush to put that idea into production - not for the current 911 and not for the next one, either.