1970 Chevrolet Corvette Base Coupe 2-door 5.7l on 2040-cars

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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

GM 8-speed transmission lawsuit granted class action certification

A story on Autoblog about potentially faulty 8-speed automatic transmissions from General Motors in 2019 has, as of the day this was published, 166 comments, mostly from owners of cars and trucks who say they are experiencing "a hesitation, followed by a significant shake, shudder, jerk, clunk, or 'hard shift' when the vehicle's automatic transmission changes gears." At the time, lawyers were seeking statewide classes in at least six states. As of today, the Detroit Free Press reports that a judge has granted class action status to a lawsuit brought by 39 plaintiffs across 26 states covering the transmission issue. The lawsuit specifically applies to vehicles that are equipped with GM's 8L90 or 8L45 8-speed automatic transmissions made between 2015 and March 1, 2019. Both of these transmissions are similar units, the 8L45 being slightly lighter version used in fewer vehicles than the beefier 8L90, and are designed for front-engine, rear- or all-wheel drive applications. The lawsuit alleges that the erratic transmission behavior makes some vehicles unsafe to drive. Ted Leopold, partner at Cohen Milstein and the court-appointed lead counsel for the case, said in a statement, "General Motors knowingly sold over 800,000 eight-speed transmission vehicles, which they knew to be defective for years, and yet made the business decision not to tell its customers before purchase." He added, "Dealers were directed to tell the customers that harsh shifts were ‘normal' or ‘characteristic.Â’ Such decision making is both highly irresponsible and emblematic of what GM believes it can get away with." The vehicles included in the court order with potentially faulty transmissions includes: 2015-2019 Chevrolet Silverado 2017-2019 Chevrolet Colorado 2015-2019 Chevrolet Corvette 2016-2019 Chevrolet Camaro 2015-2019 Cadillac Escalade and Escalade ESV 2016-2019 Cadillac ATS, ATS-V, CTS, CT6, and CTS-V 2015-2019 GMC Sierra, Yukon, Yukon XL, and Yukon Denali XL 2017-2019 GMC Canyon Some additional details of the lawsuit can be found at the Cohen Milstein site, including claims that "since 2015, GM has issued thirteen versions of a “technical service bulletin,” or “TSB,” related to this shifting issue alone." The statement from Cohen Milstein says that a "second action regarding GM vehicles with 8L transmissions is also underway in Battle v. General Motors, LLC, 2:22-cv-108783.

All of the Bond cars of 'No Time To Die' (caution for spoilers)

Note: The following overview of the cars in No Time To Die contains spoilers. Read at your own risk, or come back after seeing the film to make sure you caught everything.   No Time To Die picks up right around where Spectre leaves us. James Bond (Daniel Craig) and Madeleine Swann (Lea Seydoux) are driving along in Bond’s restored and iconic DB5 in Matera, Italy. Things donÂ’t stay all that cheery for long in picturesque Matera, though. As is tradition in Bond films, the first car chase hits us with an explosion of action in what's a super-long opening scene. Fourth-gen Maserati Quattroporte: The baddies in the beginning are driving a Maserati and chasing after Bond in the DB5. Specifically, theyÂ’re in a fourth-gen Quattroporte, which feels right for a chase scene in Italy. Its squared-off looks are mean enough, and its Italian growl is a good background soundtrack to the DB5Â’s inline-six. In addition to the Quattroporte, the chase scene in Matera is home to a couple of the best stunts of the entire movie, including the arch jump done with a Triumph motorcycle seen in trailers — Matera is extremely hilly. Eventually, Bond and Swann find themselves in the DB5 again together, which is where the famous gatling gun scene from the trailer commences, but not before the bulletproof windows and body of the DB5 are thoroughly tested. RIP to the first-gen Range Rover Classics and Jaguar XFs that joined the Maserati in pursuit of Bond (here's a list of other Bond cars over the years). As the DB5 escape scene concludes, we catch a glimpse of what appears to be a Ferrari from the 1970s. However, the view was far enough away that weÂ’ll need a second look to be sure of the exact model. Land Rover Series III: Next time we see Bond, heÂ’s fishing in Jamaica and driving around a blue Land Rover Series III. ItÂ’s yet another of the many Land Rover products featured throughout the film, and unlike most of BondÂ’s Aston Martins, this one doesnÂ’t seem to have any unique features. The other intriguing vehicle out of Jamaica? An old Chevrolet Bel-Air expertly and effectively piloted by Bond newcomer, Ana de Armas. Next up, we get a few shots of the new and still-not-for-sale Aston Martin Valhalla mid-engine supercar (also seen in trailers). BondÂ’s old boss M is in the scene which appears to have been shot in some secret wind tunnel of sorts. Much to our dismay, nobody ends up driving the Valhalla in the film. Could it be a teaser for what the next 007Â’s car is?