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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.

Chevy Colorado Z71 Trail Boss 3.0 concept heads to SEMA

Chevrolet is presenting a new take on the Colorado pickup at the SEMA show this year. The show truck picks up where the Colorado Z71 Trail Boss Edition leaves off, with numerous accessories from the parts catalog as well as several custom additions. The SEMA truck is based on a Crew Cab model with four-wheel drive, painted red with rally stripes. Among the features added from the catalog are a sport bar with LED auxiliary lighting, mounted to the cargo bed. It's also stylistically augmented with fender blares, Bowtie emblems, and rocker steps all done up in black to match the 17-inch alloys shod with Goodyear DuraTrac all-terrain tires. Chevy has also equipped this truck with an automatic locking rear diff, a transfer case shield, recovery hooks at the front, a spray-in bedliner, projector-beam headlamps, fog lamps, and all-weather floor mats. Chevy has also fitted this pickup with color-keyed door handles and mirror caps, upgraded exhaust and air intake, rubber floor liners, brushed metal interior trim, and an illuminated grille badge. Public reception will determine how many of these and other additional features will be considered for production. Colorado Z71 Trail Boss 3.0 Concept Shows Off-Road Style New styling accessories, performance parts enhance trail-ready capability LAS VEGAS – The Colorado Z71 Trail Boss Edition is designed for those who want to blaze their own trails and Chevrolet's new Z71 Trail Boss 3.0 concept vehicle enhances its off-road style with new Chevrolet accessories and performance parts. Chevrolet introduced the new concept vehicle at the SEMA Show today, where it joined concept versions of the Silverado 1500 and HD models to demonstrate the depth and breadth of the brand's three-truck lineup. "The Colorado Z71 Trail Boss Edition is made for tackling the tough terrain required to get away from it all and this concept version does it with rugged style," said Sandor Piszar, director of Chevrolet Truck Marketing. "And whether it's the Colorado, Silverado 1500 or Silverado HD, there's a Chevy truck to take you where you want to go, regardless of whether there's a road leading there." The production 2016 Colorado Z71 Trail Boss is offered in extended and crew cab configurations, with a choice of a long or short cargo bed and available 4WD – as well as the all-new 2.8L Duramax turbo-diesel, which takes the maximum trailering rating up to 7,700 pounds.

Recharge Wrap-up: GM, LG Chevy Bolt collaboration, Honda Energy Star plants

Green Car Reports details the relationship between GM and LG in the development and production of the Chevy Bolt. The unique relationship between the two companies began in 2008, and now sees LG producing a multitude of systems for the Bolt, many of which were designed by or with GM. LG's involvement in the Bolt has gone so deep as "defining what will this vehicle be, everything from how we are going to package it, what size it should be, what kind of performance it should have," according to Pam Fletcher, GM's Executive chief engineer for electrified vehicles. Forgoing the traditional automotive relationship for a more collaborative one doesn't just save money, but it also gives GM access to LG's suite of technologies and manufacturing capabilities. Read more at Green Car Congress. The EPA has awarded three Honda factories with Energy Star certification. The automaker's assembly plants in Marysville and East Liberty, Ohio have now earned Energy Star certification ten consecutive years. The Marysville plant added LED lighting, hydrogen-powered tow motors and forklifts, high efficiency HVAC and direct-fired water boilers. The East Liberty facility added new LED lighting and replaced a large water heater with a high-efficiency one. Honda's newest US plant, Honda Manufacturing of Indiana, installed LED lighting and used energy efficient features in its recent expansion. Honda also cites a culture of energy-mindedness – for every associate – for its success. "When everyone involved considers energy efficiency and how they can help the environment, results improve," says Karen Heyob, Honda's sustainability boss in North America. Read more from Honda. The student-led Associated Students of the University of Montana (ASUM) Transportation has ordered two Proterra electric buses. The 40-foot Catalyst Fast Charge buses will serve the campus, and will recharge with a semi-autonomous fast charger. "As part of our ongoing effort to innovate service, align with student advocacy and reduce our carbon footprint, we take great pride in our decision to go electric," says ASUM Office of Transportation Director Jordan Hess. "We hope this encourages – and challenges – other universities to seriously consider the economic and environmental benefits of zero-emission buses." Read more in the press release below. First Student-led Transit Agency in the U.S.