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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.

Next Nissan GT-R to take cues from GT-R LM Nismo Le Mans entry

For those wondering why Nissan named its coming Le Mans Prototype the GT-R LM Nismo, colliding the two worlds of sports car and prototype racing, an article in Autocar might have the answer. The deeper union is explained by saying that the next-generation GT-R will use "hybrid technology that will closely align it" with the GT-R LM Nismo.
The point could be further driven home by the fact that the GT-R LM Nismo will begin its FIA endurance racing campaign next year, and the next GT-R is due to debut next year as a 2016 model. The expectation is that it will use a hybrid system possibly dubbed R-Hybrid and perhaps developed by Williams. Just like performance car makers Ferrari and Audi, Nissan wants its racing efforts to pay off with road car technology, company vice president Andy Palmer saying they "want to link technological linkages between future evolutions of the GT-R and evolutions of what we do in LMP1, and the two do go in both directions."
The bigger question is, with the GT-R getting hybrid assistance, will it also get the weight gain that usually comes with it? Enthusiasts would love to see the trend reversed, especially on a car that's already no lightweight.

With Nissan dragging it down, Renault predicts a worsening year

PARIS — Renault warned revenue may decline this year, scrapping a previous goal, after first-half profit was hit by weakening car demand and an earnings collapse at alliance partner Nissan in the wake of the Carlos Ghosn scandal. Net income slumped by more than half to 970 million euros ($1.08 billion) in January-June as revenue fell 6.4% to 28.05 billion, the French carmaker said on Friday. Operating profit also dropped 13.6% to 1.65 billion euros. "Given the degradation in demand, the group now expects 2019 revenues to be close to last year's," Renault said — abandoning an earlier pledge to increase revenue before currency effects. A broad-based auto sales downturn has rattled the sector, prompting profit warnings and compounding challenges for Renault and Nissan as they struggle to turn the page on the Ghosn era. Their former alliance boss is now awaiting trial in Japan on financial misconduct charges he denies. Renault's bottom line was hit by an 826 million-euro drop in earnings from its 43.4%-owned partner. Nissan is cutting 12,500 jobs globally after an earnings collapse that it is keen to blame on Ghosn's leadership. But Renault's own performance - reflected in an operating margin that declined to 5.9% from 6.4% the year before - compares less favorably with domestic rival PSA Group. The Peugeot maker bucked the downturn with a record 8.7% profit margin unveiled on Wednesday. Alliance tensions flared after Ghosn's November arrest, worsened when Renault tried in vain to merge with Nissan then Fiat Chrysler, and may be affecting operational performance, investors fear. Citi analyst Raghav Gupta-Chaudhary flagged a lower-than-usual 258 million euros in joint purchasing savings for Renault. "We thought this would be weak in light of the well-documented difficulties with the alliance," he said. Renault blamed falling sales in France, as well as Turkey and Argentina, for a 7.7% revenue drop at its core automotive business, whose profit margin slid to 4% from 4.5%. Operating free cash flow also suffered, coming in at a negative 716 million euros as investment jumped by 742 million euros to 2.91 billion. Renault, which is counting on model launches including a new Clio mini to boost performance in the second half of 2019, nonetheless reiterated pledges to deliver positive full-year cash flow and a margin close to 6%. Renault shares were down 0.5% at 52.02 euros as of 0800 GMT in Paris, after initially falling as much as 2.7%.