1955 Chevrolet Bel Air on 2040-cars

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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.

2016 Chevy Volt rated at 106 MPGe, 53 miles of pure EV range

Following a string of rumors, Chevrolet and the Environmental Protection Agency have released official fuel economy numbers for the second-generation Volt. As was reported earlier today, the new and improved hybrid will cover 53 miles on pure electric power. As Chevy tells it, first-gen Volt owners cover about 80 percent of their mileage on EV power alone, so the 40-percent increase from the second-gen should lead to an even bigger reduction in gas-powered Volt mileage. Chevy expects some 90 percent of mileage to come from a plug with its new 2016 model. This newfound EV range comes thanks to the 2016 Volt's 18.4-kilowatt hour lithium-ion battery. Rated at 106 MPGe by the feds – exactly what was promised by a June leak – the 2016 Volt improves nicely on the current model's 17.1-kWh, 98-MPGe battery back. There's also a marked improvement when relying on the gas-powered on-board generator. The 1.5-liter, four-cylinder engine will happily run on regular fuel and return a still-impressive 42 miles per gallon combined rating once the battery's state of charge is depleted. Expect the freeway to cruise to be even better, although Chevy isn't ready to say by how much. Fully charged and with a full tank, drivers should expect to cover 420 miles, a 40-mile improvement over the current model. Scroll down for the official press release from Chevrolet Related Video: The Results Are In: More Range for the 2016 Volt EPA-estimated pure electric range is 53 miles DETROIT – The 2016 Volt is engineered to offer customers more of what they want: range, range and more range. The Volt's all-new second-generation Voltec extended range electric propulsion system delivers 53 miles of pure EV range, based on EPA testing. That is nearly a 40-percent improvement over the first generation Volt. Chevrolet expects many next-generation Volt owners will use power solely from their battery for more than 90 percent of trips. Today, Volt owners use battery power on 80 percent of their trips. This means that the average Volt owner may expect to travel well over 1,000 miles between gas fill ups, if they charge regularly. For the first 53 miles, the Volt can drive gas and tailpipe-emissions free using a full charge of electricity stored in its new 18.4-kWh lithium-ion battery, which is rated at a combined 106 MPGe, or gasoline equivalent. When the Volt's battery runs low, a gas-powered generator seamlessly operates to extend the driving range for a total of 420 miles on a full tank.

Corvette Stingray Shooting Brake under consideration by Callaway [w/poll]

Callaway has released a few renderings of a design study for a shooting brake version of the C7 Chevrolet Corvette Stingray. The company says it wants to create a long-roof version of America's sports car to offer buyers more interior room and a vehicle with "unique style." The company says it will use structural carbon fiber for the new body bits, which suggests the conversion shouldn't add too much more weight to the Corvette. Along with a few mechanical tweaks, the Callaway Corvette Stingray AeroWagon could breeze past the 200 miles per hour barrier.
Provided that they get enough interest, Callaway estimates they will be able to effect the changes on the Chevrolet for around $15,000, and says the conversion work should be available through its network of dealers. You can check out the brief press release below for more information, or head over to the Callaway site to plunk down a deposit - but before you do, we want to know... do you find this C7 wagon interesting? Vote in our poll below, then feel free to leave a few lines in Comments.
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