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GM exploring ways to raise half-ton Duramax diesel tow rating

Lots of truck owners cheered when GM announced fuel economy numbers for the 2020 Chevrolet Silverado with the 3.0-liter Duramax diesel inline-six. Even after Ram let loose its EPA mileage ratings for the 2020 Ram 1500 EcoDiesel, the Chevy oil-burner still took the trophy. The victory was years in the making, GM engineers spending an entire four-year development cycle refining the LM2 Duramax to increase mileage. The tradeoff, as well all know by now, is towing; the Duramax in half-ton duty pulls a maximum 9,300 pounds in the Silverado. Rivals across town can do more, the Ford F-150 PowerStroke rated at 11,500, the Ram 1500 EcoDiesel game to pull 12,560. GM engineer John Barta told Muscle Cars & Trucks that more hauling chops could be on the way, explaining, "We’re actually looking at upgrading some of the materials around (the engine bay) to see if we can maybe raise our tow rating." Engine bay materials are at issue due to thermal complexities underhood. John Barta, GM's assistant chief engineer of diesel engine controls, said the Duramax's inline-six configuration allowed engineers to get emissions hardware like the combined selective catalytic reduction, diesel oxidation catalysts, and diesel particulate filter unit closer to the engine, where it heats up quicker, getting emissions down quicker. But that filter puts another heat source in those confines, enforcing a cap on the tow rating to keep the engine and other systems from overheating. "If you look under the hood," he said, "youÂ’ll see a significant amount of silver ‘moon tapeÂ’ around to make sure things arenÂ’t getting overheatedÂ… if we were to go up in higher towing, which we can, we start impacting the possibility of deteriorating some of the components.” There isn't much space for more grille, so swapping for a better grade of "moon tape" or a different kind of material could reduce engine bay heat, extracting a higher tow rating in the process.  It's important to note a point Barta's been making for months about the Duramax figures, though. "Even though itÂ’s nice to brag about big numbers, in reality, light duty customers are not towing that large with their trucks," and, "We do know that (95 percent) of our light duty customers donÂ’t tow over 9,000 pounds." On our First Drive of the 2020 Silverado diesel we called out the tow rating, but emphasized that the Chevy and GMC have more important challenges to overcome.

Fernando Alonso just misses qualifying for Indy 500 on first day

Former Formula One world champion Fernando Alonso will need a clutch run on Sunday to qualify for the Indianapolis 500 on May 26 after he failed to seal a guaranteed spot on Saturday. The Spaniard tried fives times to put his McLaren Racing Chevrolet in the top 30, but wound up one spot short. He can make the 33-car field only through a six-car shootout on Sunday that will determine the race's final three drivers. "We have another chance to be in the race," Alonso, who is seeking to make his second Indy 500 field, told IndyCar TV. The Spaniard twice got inside the top 30 but both times was bumped outside the mark, with JR Hildebrand and Graham Rahal the final two drivers to seal qualifying spots. Britain's Pippa Mann will be the only woman in the race, qualifying 30th in 227.244 mph. Race positions 10-30 were determined during the day-long qualifying with Saturday's nine fastest drivers set to return on Sunday to decide pole. Spencer Pigot, driving the Ed Carpenter Racing Chevrolet, led qualifying with a four-lap average of 230.083 mph. He was followed by 2018 winner Will Power of Australia (230.081) and Simon Pagenaud of France (229.854). The troubles for Alonso, whose top four-lap average was 227.224 mph, were exacerbated by a punctured tire in his first qualifying run. "That didn't help," Alonso told reporters. "But, obviously, our performance has been quite bad all week. Quite poor." The Spaniard crashed his Chevrolet in practice on Wednesday and missed nearly two full days of practice while a backup car was prepared. He returned on Friday. Alonso said he was worried the McLaren team was "not ready for the challenge." "We've been slow. You see Juncos Racing crashing yesterday and being ready at 6 o'clock. That's impressive," he said. "For us, we've been a little bit slow on everything." Alonso is bidding to join Graham Hill as the only drivers to achieve the 'Triple Crown of Motorsport' with an Indy 500 victory. He previously won the Monaco Grand Prix and Le Mans 24 Hours race. He also won two Formula One drivers' titles. (Reporting by Gene Cherry in Raleigh, North Carolina; Editing by Greg Stutchbury)Related Video: Motorsports Chevrolet McLaren IndyCar

Junkyard Gem: 1985 Chevrolet Sprint

For in the 1985 model year, General Motors began selling Chevrolet-badged Suzuki Cultus hatchbacks in California. Sales of the cheap three-cylinder econobox in the rest of North America followed soon after (with the Canadian version known as the Pontiac Firefly), and did pretty well considering the crash in gasoline prices during the middle 1980s. Starting in 1988, the facelifted Sprint became the Geo (and, later on, Chevrolet) Metro. Here's one of the very first Cultuses sold on our shores, found in a San Francisco Bay Area car graveyard. Amazingly, the primitive rear-wheel-drive Chevrolet Chevette remained available all the way through 1987, competing with the thriftier front-wheel-drive Sprint in the same showrooms. For 1988, Pontiac started selling a rebadged Daewoo LeMans, so the Sprint/Metro never lacked for intra-corporate competition. Inside, you'll find the same stuff most mid-1980s Japanese econoboxes got: tough cloth upholstery and long-wearing hard plastics. Suzuki quality in 1985 wasn't quite up to Honda or Toyota levels, but you weren't paying Honda or Toyota prices for the Sprint. MSRP on this car started at $4,949, or about $12,000 in 2020 dollars. The cheapest possible 1985 Chevette cost $5,340, while a new no-frills Ford Escort would set you back $5,620. Subaru, however, could have put you in a punitively unappointed base-model Leone hatchback for just 40 bucks more than the Sprint that year. I think I'd have sprung the extra for a $5,348 Toyota Tercel, a $5,195 Mazda GLC, or— best cheap-commuter deal of all that year— the $5,399 Honda Civic 1300 hatchback. I was 19 years old and driving a Competition Orange 1968 Mercury Cyclone that year, and I recall feeling pity for Chevy Sprint drivers, new-car smell or not. Still, these weren't bad cars for the price, though a Sprint with an automatic transmission was a real character-builder. Got three cylinders and uses 'em all! 48 horsepower from this hemi-headed SOHC 1-liter. The Turbo Sprint — yes, such a car existed — had a howling 70 horsepower. The hood-latch release is a rectangular button that resembles a badge. 1985 Chevy Sprint Commercial The highest-mileage, lowest-priced car you can buy. 1985 holden barina commercial The Australian-market version was the Holden Barina, and the TV ads featured the Road Runner. 1983 SUZUKI CULTUS Ad In its homeland, this car got screaming guitars and a drive through New York City for its TV commercials.