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Our favorite mid-engine Corvette theories and rumors

The mid-engine Corvette! We just saw blurry photos through the foliage, and are hearts are all aflutter because it means that this car is real. And it's the most " never before" Corvette since 1984. Which leads us to all kinds of wacky theories and speculation. Everybody knows something or heard from a guy. None of those guys (or gals) from GM are talking to Autoblog, to be clear. But that won't stop us from stirring the pot. Let's go over a few point-by-point. The pushrod engine will be replaced by an overhead-cam V8 Car and Driver has repeatedly reported that an overhead-cam engine will come after the mid-engine Corvette's debut with an old-school pushrod. We've heard the same thing firsthand, albeit from a source with no connection to the development of the Corvette or powertrain. "At some point two valves can't pass future emissions regulations," said the guy we know. While the pushrod engine is compact, the design makes it difficult - if not impossible - for sophisticated variable valve timing (and lift) systems that control combustion with more precision. Hasty conclusion: The pushrod engine has a finite life in front of it. This one's a lock, it's a just a matter of when. Bowling Green's new paint shop is really the mid-engine assembly line Credit to Reddit for this one. Like we said, everybody knows a guy. But let's look deeper. The new paint facility costs $439 million dollars and adds 450,000 square feet, almost half the size of the existing plant. Plus GM announced another $290 million in upgrades at Bowling Green Assembly. That sure sounds like a lot of money, but you can actually spend that much on a paint booth. Porsche spent 500 million Euros (about $561 million dollars) to add the Macan assembly to its Leipzig, Germany plant in 2014. Chrysler shelled out $850 million for a paint shop in Sterling Heights, Michigan. GM spent $600 million for a new paint shop at the Fairfax (Kansas City) plant. Honda, on the other hand, is working on a thrifty $210 million project in Marysville, Ohio that includes a 300,000 square foot expansion, and the low-volume Acura NSX facility only cost $70 million. Hasty conclusion: The square footage and cost could easily mean a new assembly line instead of (or in addition to) a paint line. And if the NSX plant was really that cheap, GM could have hidden a similar sum in its existing announcements.

General Motors could turn Hamtramck into its electric pickup, SUV hub

Electric off-roaders could revitalize the Detroit-Hamtramck factory that General Motors previously announced it will close. While official details remain shrouded in secrecy, analysts believe the plant will be re-tooled to manufacture at least three electric models due out during the early 2020s. The plant's scheduled closure was one of the grievances the United Auto Workers (UAW) union cited when it embarked on a 40-day strike in September 2019. General Motors agreed to keep it open without shedding much light on what it planned to build there. Analyst at LMC Automotive told the The Detroit News they believe an often-rumored electric SUV that will resurrect Hummer's name, image, or both will be one of the models assigned to the Hamtramck plant. Battery-powered variants of the GMC Sierra and the Cadillac Escalade will be made there, too, as will an enigmatic van. LMC Automotive's Jeff Schuster believes the van will come first; it could enter production as early as 2021. The Hummer — which might also be offered as a pickup — will follow before the end of 2022, while the Sierra and the Escalade will both arrive in 2023. We're taking this report with a grain of salt, though, because only one of the aforementioned models has been announced by General Motors. Rumors of a Hummer resurrection emerged in the summer of 2019, just a few weeks before we heard unverified reports of a battery-powered variant of the next-generation Escalade. General Motors confirmed plans to enter the burgeoning electric pickup truck segment, which Ford, Rivian, and Tesla also have their sights on, but it hasn't detailed how or when. The van is a mystery. General Motors refused to comment on the report. It previously announced it will keep Hamtramck open, and invest $3 billion to build electric vehicles there. The investment will create 2,225 jobs. Inaugurated in February 1985, the Hamtramck factory has churned out a diverse selection of models over the past 34 years, including Cadillac's Eldorado, Seville, and Allante, the Oldsmobile Toronado, the Buick Riviera, and more recently, gasoline-electric Chevrolet Volt. General Motors announced plans to close Hamtramck in 2018, but it quickly backpedaled and extended its lease on life until 2020 by keeping the Chevrolet Impala and the Cadillac CT6 around for a few additional months.

GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging