1957 Classic Vintage Speedster 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.

Jay Leno welcomes Emory's outlaw Porsche 356s

Classic cars can have a lot of character, but purposely passing up on some of the enormous advancements made to the automobile over the decades since those classics were made can be a difficult proposition. That's where restomodders like Emory Motorsports come in. Emory specializes in customizing Porsche 356s, modifying them to their clients' specifications and giving them an added dose of performance and refinement, all without losing that timeless appeal. The LA-based company is headed up today by third-generation Southern Californian gearhead Rod Emory. After seeing some examples of his work out on the road, Jay Leno invited Rod by the garage along with a pair of his company's custom creations. Both are based on 356 coupes from the late 1950s, but take pretty different approaches in their comprehensive restoration and extensive modification. Since classic Zuffenhausen enthusiasts are notorious for their rigid adherence to originality, Emory's modified 356s are deemed to be "outlaws" by many on the vintage Porsche scene. But they've also gained quite a following, similar to what Singer has done with 911s. Whether you're more inclined to cling to authenticity along with the purists or embrace the novelty espoused by the restomodders, after scoping out these irresistible specimens, you'll have to admit that Emory does some pretty compelling work. Watch the 25-minute video clip above to see what we mean, and check out Petrolicious' profile of the same company's work from last year for another look.

Porsche to replace chassis components in 918 Spyders

The entire production run of the Porsche 918 Spyder is completely sold out, but 205 of them need to make a trip to the dealer for a repair estimated to take about two days. According to Porsche, it found quality problems with unspecified "chassis components" on the hybrid supercar and has instituted a plan to fix them as a precautionary measure. There were no reported breakages of these parts or complaints from customers. The German automaker already contacted all of the affected owners directly to have the 918s repaired in 2015. When reached for comment, Porsche Director of Corporate Communications Achim Schneider told Autoblog via email that "due to the supplier relationship we did not announce further details regarding the components so far." He also said that 43 vehicles are affected in North America, which includes the US and Canada. The 918 Spyder was affected by a small recall in the US earlier this year when Porsche found that the rear-axle control arms could potentially break. The campaign covered only five cars, though. Porsche replaces chassis components in 205 vehicles worldwide Atlanta. As a precautionary measure, Porsche will replace chassis components in 205 vehicles of the 918 Spyder model worldwide. The reason for this is that for vehicles that were manufactured in a certain time period defective parts were used from a delivery batch, whose functionality cannot be permanently guaranteed. No complaints have been made known (such as a break of a component) from customers up till now. The problem was identified during in-house quality inspections and remedied immediately. The owners of the vehicles, which could be exactly traced, were contacted directly by their competent Porsche representatives. The workshop visit, which will take place by appointment at the onset of 2015, takes about two days to complete at no charge. Featured Gallery 2015 Porsche 918 Spyder: First Drive View 51 Photos News Source: PorscheImage Credit: Copyright 2014 Michael Harley / AOL, Porsche Green Recalls Porsche Hybrid Supercars porsche 918 spyder porsche 918