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Chevy Chaparral 2X Vision Gran Turismo concept blends the past and the future

The Chevrolet Chaparral 2X Vision Gran Turismo is the rare concept car that salutes a seminal moment in history, yet also borders on science fiction.
Revealed Wednesday at the Los Angeles Auto Show, the concept uses the name of one of Chevy's historic racing partnerships, with Chaparral Racing, which dates to the 1960s. Chaparrals raced successfully at a range of levels, including IndyCar, Trans-Am and SCCA competition.
But the history ends there, as the concept's main purpose is as a racecar in a downloadable update for the PlayStation 3 game Gran Turismo 6.

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.

GM slashes prices in China as sales falter

Buying a vehicle from General Motors' stable of brands might be a lot cheaper in the near future – at least for customers in China. The effort comes as GM hopes to keep sales there growing, and the decision alludes to yet another sign that the Asian country no longer has the booming auto market of past years. GM and its Chinese joint venture partner SAIC are slashing prices by as much as the equivalent to $8,700 on 40 models from Buick, Chevrolet, and Cadillac, according to The Detroit News. Across all of automaker's nameplates, the overall sales dipped in China in April by 0.4 percent to 258,484 vehicles. Among the drops, Buick was down 8.5 percent, and Chevy shrunk 5.6 percent. Caddy's numbers increased 4.6 percent for the month, though. Buick remains a popular brand in the minds of Chinese consumers, but according to The Detroit News domestic automakers there are starting to eat into the dominance of foreign companies in the market. The country remains important for GM, though. Late last year, it outlined a future strategy that included China as a major pillar, including a $14 billion investment to build five new factories and boost sales. News Source: The Detroit NewsImage Credit: Alexander F. Yuan / AP Photo Buick Cadillac Chevrolet GM Car Buying Car Dealers saic