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Chevy Bolt EV's battery shows big improvements over Spark's

Plug-in vehicle battery technology moves fast, and all you need to do to see this in action is to take a look at the new 60-kWh lithium-ion pack inside the 2017 Chevy Bolt EV. Well, you need to do that and then compare it to the battery packs inside of GM's other plug-in vehicles. And you don't even to go as far back as the EV1 to see progress. Let's start with what we know about the new Bolt's pack. It is supposed to drive the Bolt EV over 200 miles on a full charge. It weighs 960 pounds and is made up of 288 cells. Chevy's other all-electric car, the limited-availability Spark EV, had a 19-kWh pack and offered 82 miles of range. It had 192 cells and weighed 474 pounds. So, in the few years since the Spark EV was released, GM engineers have figured out how to get three times the energy capacity and almost two-and-a-half times more range out of a pack that weighs only about twice as much. And that doesn't even get to the price drops. GM has figured out how to get 3x the energy capacity and almost 2.5 times more range out of a pack that weighs only twice as much. Speaking of those 288 cells, that number might sound familiar to regular readers because that's exactly how many are in the new Chevy Volt. But the packs in the Volt and the Bolt are entirely different beasts. For one thing, while the Volt cells are made by LG Chem in Holland, MI, LG Chem will make the Bolt's cells in South Korea. The cell chemistries are also different. We spoke with GM engineer Tim Grewe (again) and while he declined to answer some of our Bolt battery pack questions until more details are unveiled at the SAE World Congress in April, he was able to explain a few things. "The cell inside the Chevy Bolt EV was specifically designed for EV range so it's up on energy," he said. "That's a different cell chemistry than on the extended range Chevy Volt, which is a smaller pack, smaller energy but more power per cell. We work with all of those vehicle requirements and customer demands and we say how do we meet this and we change the chemistry to make it all work." Comparing the 60 kWh in the Bolt and the 18.4-kWh pack in the Volt is really one of those apples to oranges issues, he said. "If you look at the Volt battery pack, how it went from where it was and where it's up to, from 38 miles to 50 miles, that was basic, overall industry improvement. Now, the 18 [kWh] to the 60 [kWh] is extended range vs. EV.

Watch a 2015 Corvette Z06 run the quarter in 11.7 seconds

We're not writing about this because it's an amazing run, we're writing about it because it appears to be the first run. Someone took a 2015 Corvette Z06 to Royal Purple Raceway in Baytown, Texas and blasted it down through the quarter mile. It's still wearing the dealer number in wax pen on the windshield and dealer plates, so this example is fresh from the mold. It's also a seven-speed manual. General Motors said the row-your-own Z06 can do the 'strip in 11.2 seconds, and they undoubtedly had a professional driver and more than one run to set that time. To have Just Some Guy show up at the raceway and do an 11.7 at 120.54 mph on his first run means we expect good things to come as Z06s get delivered to their owners. Check out the run in the video.

Chevrolet Suburban Luggage Test: How much fits behind the third row?

From the very beginning of doing these luggage tests, I specifically had no intention of doing one for the Chevy Suburban or any extended-length full-size SUVs. Quite simply, there was no question that my six suitcases were going to fit behind the third row. And not only that, I was pretty confident there'd be a ton of space left over, much as there is in mid- and full-size two-row SUVs.  And yet, you know what vehicle I've received more requests for cargo-related information about over the years? That's right, the Chevrolet Suburban. Sure, it's not exactly BTS fan mail volumes, but it's more than anything else. Apparently, people want to know how much fits in the back of a Suburban (or GMC Yukon XL ... or Cadillac Escalade ESV). So, when a Suburban popped up in the press fleet I decided to finally give the people what they want.  As a reminder, this is the amount of cargo space behind the THIRD row of a Suburban. Chevrolet says this is 41.5 cubic feet, and it sure looks like it.  For the record, the most stuff I've ever put into the back of a three-row vehicle is a Honda Odyssey, which has 32.8 cubic feet of space. I never did another minivan after that, for reasons effectively described above. And no one has asked for it. Now, because I'm greedy, I lifted up the floor to see if there's any underfloor space. Wow, there is! Theoretically, it could lower the floor a bit and allow for even more stuff, but the floor's hinges don't allow it. Unlike those in a BMW that can be propped into an upright position, these'll just drop the floor back down again. That's OK, I won't use this then. Let's get to the bags. As with every Luggage Test, I use two midsize roller suitcases that would need to be checked in at the airport (26 inches long, 16 wide, 11 deep), two black roll-aboard suitcases that just barely fit in the overhead (24L x 15W x 10D), and one smaller green roll-aboard that fits easily (23L x 15W x 10D). I also include my wife's fancy overnight bag just to spruce things up a bit (21L x 12W x 12D). So yeah, it all fits. No surprise there. In fact, there's even more room leftover than I anticipated.  Let's go to the extra (and imaginary) items, then! First up, the trusty 38-quart Coleman cooler. This added to my bags, plus maybe a duffle bag, is what big "compact" SUVs like the Kia Sportage and Toyota RAV4 can manage.