1990 Cadillac Allante Value Leader Convertible 2-door 4.5l 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

Cadillac's Butler announces surprise departure

The Detroit Free Press is reporting that Cadillac's vice president of global strategic development, Don Butler, has resigned. Butler has held the position since April, after a term as vice president of US marketing for General Motor's luxury brand.
As the report explains, the timing here is pretty unfortunate for Cadillac. Butler is the third high-profile member of Cadillac's brass to depart in recent months, following the firing of US sales boss Chase Hawkins and the pending departure of Susan Docherty. Cadillac spokesman David Caldwell told the Detroit paper, "Bob [Ferguson]," global boss for Cadillac, "and other leaders asked him to stay on. Don's here in the office today - and told our team that his decision is purely on a personal level. After three years of putting everything into Cadillac, he is stepping away for some personal time, and to consider new avenues in his life."
Butler says his decision is part of a decision to "recalibrate, reassess my priorities." Whatever the reason, it's an unpleasant surprise for Cadillac, which has been on a surge in 2013, with 30-percent jump in sales on the heels of the hot-selling ATS.

Cadillac Escalade driven by Tony Soprano for sale

If you're a fan of The Sopranos imagining a trip to the Bada Bing, then check out this white 2003 Cadillac Escalade ESV for sale by RR Auction. James Gandolfini drove this luxury SUV in the role of Tony Soprano for the last three seasons of the mafia-themed series. Gandolfini also signed the interior to give you something to show off to your buddies. If you've ever watched the show, you've almost certainly seen this white SUV before. According to the auction listing, the series featured two Escalades, and this one was used for exterior shots. The Caddy even starred in an action scene in season 5 when Tony chased after Phil Leotardo. Gandolfini's signature appears inside twice: once with "Thanks for the truck, James Gandolfini" and again with just his name. The auction also includes a letter of authenticity that's signed by the actor, and a second document asserts the SUV's use in the series. Apparently, Gandolfini had a habit of signing messages in his vehicles from the show – at one point he wrote a threatening "Be nice to my car" message in a red Chevrolet Suburban from earlier episodes. The auction for Tony's Escalade runs from November 12-19, which still leaves plenty of time for a meeting of the families to decide to buy it. Bidding starts at $5,000, and according to The Drive, the consignor estimates a final price between $30,000 and $50,000. This sale should at least come to a more definitive end than The Sopranos did. Related Video: