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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.

Domino's reveals Chevy Spark-based delivery car

Next time you order from Domino's Pizza, check out the delivery car. In an effort to get hot and fresh pizzas to hungry customers, the company is creating a small run of custom vehicles that are tailored for the job. Dubbed the Domino's Delivery Expert (DXP), these 2015 Chevrolet Spark-based hatchbacks pack a plethora of features to provide the perfect pie. When the DXP's on delivery duty, every order should arrive steaming hot thanks to the hatchback's biggest custom upgrade – a warming oven right behind the driver. Accessible from outside, it can keep pizzas at the perfect temperature on the way to your house and hold two of Domino's Heatwave bags. Other than the driver's seat, the rest of the interior also gets replaced with bountiful storage and non-slip surfaces. According to the company, as many as 80 pizzas could conceivably fit inside, and that would be quite a party. The exterior is still clearly derived from the Spark but with some clever additions. An illuminated "Out for Delivery" sign is on the roof, and a puddle light shoots the Domino's logo on the ground. Plus, the company's red-and-blue color scheme is emblazoned over the hood, pillars, and hatch. Underneath all the pizza-related mods, power comes from a 1.2-liter four-cylinder and CVT. Rather than just a one-off stunt, Domino's is working with Roush Enterprises and former General Motors exec Kenneth R. Baker to build 100 DXPs. They're hitting the streets in 25 US cities, and you can check if your locale is included on the project's website. The seed of this idea came from a partnership with Local Motors to crowdsource the ultimate pizza delivery platform. Domino's Launches Purpose-Built Pizza Delivery Vehicle Domino's Innovative DXP™ Created by Three Great Michigan Brands and an International Crowdsourcing Design Competition Ann Arbor, Mich., Oct. 21, 2015 -- In its latest innovation as the recognized world leader in pizza delivery, Domino's (NYSE:DPZ) is launching the Domino's DXP™ (Delivery Expert), a specially designed and built pizza delivery vehicle. The DXP is the combined brainchild of former GM R&D executive Kenneth R. Baker, Michigan-based Roush Enterprises and Domino's. To also include consumers' input, hundreds of concepts were initially identified in an online crowdsourcing design competition hosted by Local Motors. "The Domino's DXP is the first purpose-built vehicle aimed at revolutionizing pizza delivery," said Russell Weiner, president of Domino's USA.

Next-gen Chevy Volt will get 1.5-liter, four-cylinder engine

As General Motors gets ready to unveil the new Chevy Volt at the Detroit Auto Show in January, it's starting to reveal a few more details about the updated plug-in hybrid. Today should be fruitful on that front, thanks to an event GM is hosting today that focuses on the new Volt, and we've just had the first bit of new: a bigger engine is coming. Since the beginning, the Volt has used a 1.4-liter, four-cylinder engine as a range extender when the battery runs dry. The second-generation model will instead get a slightly larger 1.5-liter, four-cylinder engine that will be built in Flint, MI. That's a step up from the various engines that have been a part of the 2016 Volt's rumored mills, everything from a 1.0-liter or 1.2-liter three-cylinder to a 2.0-liter turbo. The confirmation about the new 1.5-liter powerplant was found in Automotive News, where we also heard again that GM is going to start building the new Volt's electric drive unit in Detroit, moving production up from Mexico. We will have more information on the 2016 Chevy Volt later today.