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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.

Why does the Corvette Stingray have so many vents? Here's why

Just looking at the new 2014 Chevrolet Corvette Stingray, it's not hard to see that the car's design was created with aerodynamics at the forefront, but Chevrolet designers point out exactly what went into designing the iconic coupe in a pair of recently released videos. The videos show the Corvette going through early design phases, including clay models and wind tunnel tests, as well as talking to the car's chief engineer, Tadge Juechter.
Both videos help explain various aspects of the C7 Corvette, but it's the aero tuning of the car that is most interesting. This includes extra attention paid to the lower air dam and vented hood to help reduce drag and lift, while the rear quarter inlets are for differential and transmission cooling. Juechter said that some of these aero-tuned elements were inspired from GM's involvement in racing.
If you have about five minutes and you can't get enough information about the new 'Vette, then check out the videos posted below.

Recharge Wrap-up: Tesla's Europe plans, Chevy Bolt details

Hybrid Cars takes a close look at the battery cooling system and gearbox in the 2017 Chevrolet Bolt. While information is still limited, we can make educated guesses about the car's inner workings. The Bolt's liquid battery cooling system appears simpler than that of the Chevy Volt, eschewing active inter cell cooling plates for what appear to be bottom cooling plates. The Bolt has a coaxial gearbox, with the electric motor and the drive shaft on the same axis. It uses a simpler parallel-helical gear set rather than the planetary reduction set used in the Chevy Spark EV. These simplifications have the benefit of helping lower the cost of the Bolt. Read more at Hybrid Cars. Tesla is planning to expand its Supercharger network in Europe in 2016. While a handful of countries in western and central Europe have an established Supercharger network, many European countries still have no Tesla presence. That should change this year, as a map of planned locations includes Spain and Portugal, Ireland, Scandinavian and Italian expansions, and the first Superchargers in many eastern European nations, including Poland, the Balkans, Russia, Ukraine, Romania and even Moldova. By the end of the year, you should be able to take that electric road trip from Lisbon to Moscow you never knew you were planning. Read more at Teslarati. National Biodiesel Board CEO Joe Jobe sat down for an interview with the Tampa Bay Times. In the interview, Jobe discusses biodiesel's environmental impact and relationship with the fuel market. He talks about its production, and its differences from the other major biofuel, ethanol. Jobe says the biggest challenge is dealing with the petroleum industry, which biodiesel needs to work with despite their differences. "It's a threat when you have the largest, wealthiest most powerful industry in human history making it a top priority to eliminate policy that is aimed at helping incentivize renewable energy," says Jobe. Read more from the Tampa Bay Times. Related Gallery 2017 Chevrolet Bolt EV: Detroit 2016 View 10 Photos News Source: Hybrid Cars, Teslarati, Tesla Motors, Tampa Bay Times Green Chevrolet Tesla Alternative Fuels Biodiesel Electric recharge wrapup