Porsche: 911 Carrera S 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.

Petrolicious profiles a Porsche 911 hot rod called The Growler

Petrolicious always does a superb job of showcasing fantastic vehicles and their owners. While some of its videos might go a little too far into the personal stories rather than putting the cars on the road for some people's tastes, this latest one is an absolute feast for the senses. The vehicle featured is called "The Growler," and this Porsche 911 hot rod assaults its driver with a wall of sound. The coupe maintains only the tiniest amount of on-road civility to still be regularly usable. Boasting a roll cage and a set of racing buckets inside, The Growler certainly looks all business. An engine tune, suspension upgrade, and 400 pounds of removed weight are enough to turn this 964-chassis 911 into something really sublime behind the wheel, too. As the first air-cooled car for owner Alex Bermudez, he's definitely starting near the top. Filmed on some misty canyon roads, the white coupe roars around sounding more like a racecar than anything road legal, and Petrolicious perfectly captures the this Porsche as it's flung around the narrow path. You can see the rear end just begin to step out before Bermudez catches it. Inside, each shift looks like the movement of a rifle bolt to shoot the car forward. Listening to the engine build revs might be the best thing you hear today, so stop what you're doing and take a listen. Related Video:

Porsche 911 with VW turbodiesel prepares for LeMons assault

LeMons racing is a wonderful example that setting limits can actually breed creativity. The series mandates that all entries must cost $500, not counting safety equipment, and that cap forces teams to be ingenious in how they build a racecar. Take for example this diesel-powered Porsche 911, which its creators have dubbed Ferkel the Nein-11, that will be racing in the Sears Pointless race this weekend in Sonoma, California.
This Frankenstein combines a 911 chassis that was originally bought just for its European powertrain and a Volkswagen TDI diesel engine mounted in the rear. After deciding the shell could still be of some use, the team decided to go racing. "We began brainstorming what replacement drivetrain to use for maximum offense and there was really only one answer: a diesel," said Philipp von Weitershausen, one of the team captains, to Jalopnik. They bought a 1998 Jetta TDI on the cheap and started figuring out a way to hack the engine into the bay. To pay respect to the donor, the VW's trunk was highly modified (and drilled) and grafted onto the back of Ferkel.
This team isn't a newcomer to LeMons. Its last car was a classic VW Beetle with a Subaru engine and dual controls, named Ferdinand the Bug, which could be driven from the left or right side. It's quite a sight.