1978 Cadillac Eldorado 2 Door Coupe White V8 No Reserve!!! 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

Nine cars we wish were convertibles

The snow has melted, the sun is shining, and the days are getting longer. At the Autoblog Detroit office we feel like our winter hibernation is finally over. And with warmer temperatures come visions of opening up a convertible roof and cruising. You know, just turn up the bass and let the Alpine blast. There are plenty of droptops on sale in the US, and more on the way (like the 2016 Mazda MX-5 Miata). That said, we always want more. More! More! More! In that spirit, we cooked up a list of nine cars aren't currently sold as convertible, but ought to be. Check out our picks, below. Summer's just around the corner. Subaru BRZ / Scion FR-S In some parallel universe, this car actually happened. Toyota showed us a FT 86 Convertible concept at the Geneva Motor Show in 2013, and we immediately started licking our chops over the thought of a rear-wheel-drive convertible based on the Subaru BRZ and Scion FR-S twins. These days, the MX-5 Miata is our only option for affordable roadster fun. A competitor to the Mazda seems like a no-brainer to us, especially since we have naught but good to say about the BRZ/FR-S as-is. Unfortunately in our present timeline, this car is as likely for production as a BRZ STI. Which is to say, not very. Dang. Lexus RC F Unlike the FR-S, a convertible from Toyota's luxury division might actually see the light of day. The current IS convertible is about to be phased out, and the Lexus LF-C2 concept from the 2014 Los Angeles Auto Show is really a thinly veiled look at a possible RC convertible. A droptop RC would be plenty good, but let's reach for the starts. What we really want is to run topless in an RC F, complete with that powerful, loud, 5.0-liter V8 engine. Lexus says the RC F is a true competitor to the BMW M4. If that's true, it only makes sense for Lexus to mimic the Germans and offer its performance coupe in a folding hardtop form. Maybach Landaulet Maybach is bach back, recast as an upper crust trim level for Mercedes-Benz. The Mercedes-Maybach S600 is seriously awesome, and more luxurious than a trip to the spa. But why not go a step into the truly ridiculous levels of extravagence and bring back that open-top Landaulet? We think your local princess will love this idea, and with better S-Class bones underneath, Jeeves will have a pretty enjoyable ship to steer, too. Besides, with that slick new Mercedes design language, a Landaulet redux wouldn't be nearly as hideous as the old model, pictured here.

2017 Cadillac CTS-V Drivers' Notes | V is for velocity

The 2017 Cadillac CTS-V is as close to a four-door Corvette Z06 as you're ever likely to get. Underneath the carbon-fiber hood rests one hell of an engine, a 640-horsepower supercharged V8. It's only slightly less powerful than what you'll find in the Corvette. Thanks to GM's chassis wizards, the car's handling is an equal match for the powerful engine. This particular car packs in a number of options, including Recaro seats and the performance data recorder that allows owners to measure lap times and record video. The most expensive option is the $6,950 Carbon Black Package. This nets you a carbon fiber hood vent, front splitter, spoiler and rear diffuser. This car isn't cheap, but it does undercut the less powerful Audi RS7 and Mercedes-AMG E63 S. Associate Editor Joel Stocksdale: This is a seriously fun, if also flawed, car. And the biggest contributor to the fun is the big lump of V8 under the hood. The supercharged 6.2-liter makes 640 horsepower, but Cadillac could've left the number off and just called it "effortless." The gentlest pressure on the gas pedal will result in you picking up an extra 10 mph without ever noticing. And when you stomp on it, you get this huge and immediate surge of acceleration. It's truly giggle-inducing. Although the CTS-V is big and heavy, it handles the power well. It gives you enough info on what's happening so you feel in control, and the chassis is impressively composed. The only real weak points I can find on the CTS-V (besides the low gas mileage) are the interior controls. They are abysmal. The infotainment screen is pretty poor, with a clutter of information at the main screen, and difficult-to-find commands for getting to other menus. But worse than that are the climate and volume buttons. They're all touch-sensitive spots on the center stack. They're not very responsive, and the vibratory feedback it provides isn't noticeable while driving. It doesn't help that the feedback feels pretty inconsistent, too. For me, I think I could learn to live with the infotainment, simply because I love the way the rest of the car feels and drives. But, Cadillac, you need to get to updating this ASAP. Associate Editor Reese Counts: OK, Cadillac's infotainment system sucks. Let's get that out of the way. Touch capacitive interfaces don't work well in cars. This does have the old version of CUE, so I'm hoping the next-gen system will fix some of the interface issues. Like Joel, this wouldn't turn me off from buying the car.