Pearl White, New Tires Runs Great And Cold Ac on 2040-cars

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Cadillac CT4 and CT5 get meaningful updates for 2021

It's common for vehicles to get an update here or there in between full redesigns every five or six years, but the changes being made for the 2021 Cadillac CT4 and CT5, each just introduced last year, represent more than just a little nip and tuck. For starters, Cadillac's excellent Super Cruise will show up on the options sheets for the two sedans early next year in Enhanced form with with Lane Change on Demand functionality. Super Cruise will be offered on Premium Luxury and V-Series trims only. As we already knew thanks to early order guides, a new 12-inch digital instrument cluster that features driver-selectable themes is also on the menu for 2021. A traditional Tour theme is probably what most drivers will default to, while a Sport theme will likely include red accents and performance-monitoring readouts and a Stealth theme will offer minimal information and what we'd guess are non-distracting colors. CT4-V and CT5-V models will get an exclusive Track theme. New for the CT5 Sport trim level is a V Performance package that adds upgraded suspension bits, Magnetic Ride Control and a mechanical limited-slip differential. V Performance front brake calipers from Brembo are also optional on Sport models. Additionally, a new Diamond Sky special edition package will be offered on Premium Luxury CT4 and CT5 models, adding interior and exterior styling upgrades along with all-season run-flat tires on unique wheels. The package also gets the aforementioned V Performance brakes. Additional updates include wireless Apple CarPlay and Android Auto, SiriusXM with 360L with more than 200 live SiriusXM channels and on-demand programming choices, and a console-mounted rotary infotainment knob that enables left and right clicks to more easily navigate the CUE infotainment system. Buckle to Drive will come enabled from the factory (it can be disabled after purchase) and won't allow the driver to shift into drive unless the seatbelt is buckled. A Teen Driver mode will encourage safe driving from — you guessed it — teens. Forward collision alert, front pedestrian braking, automatic emergency braking and the patented haptic Safety Alert Seat are now standard equipment across the board for both sedans. Check out the image gallery above to see many of the updates, including Super Cruise, the digital instrument cluster and the Diamond Sky edition. Related Video:    

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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