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Cadillac is returning to endurance racing with a new prototype in 2017

In two months, Cadillac will return to top-tier endurance racing with its all-new Daytona Prototype International racecar after 14 years away. The car, which adheres to IMSA's new DPi regulations, looks as long, low, and Cadillac-like as anyone could have hoped. It's set to debut at the Rolex 24 at Daytona and will compete head to head with the likes of Mazda and Nissan in what is shaping up to be one of the most diverse and exciting forms of American motor racing in years. The new car will be run by Wayne Taylor Racing, the team that previously fielded the Corvette Daytona Prototype. Wayne Taylor himself has won the 24 Hours of Daytona twice, in 1996 and 2005. He now manages the team and leaves the driving duties to his two sons, Ricky and Jordan. They'll be joined in the cockpit by Max Angelelli, Wayne Taylor's teammate in 2002 at Cadillac's last unsuccessful attempt at endurance racing. To understand Cadillac's new car, officially called the DPi-V.R., you need to understand IMSA's DPi category. Basically, manufacturers are allowed to base their car on one of four chassis that follow the FIA LMP2 regulations. The chassis come from either Dallara, Onroak Automotive, ORECA or Riley/Multimatic. Cadillac will base their car on the Dallara platform. The DPi regulation differ from the LMP2 in two major ways: non-standardized engines and the ability to change certain parts of the bodywork. The DPi regulations are intended to give the variety of the top-tier LMP1 cars at a fraction of the cost. When it came to choosing an engine, Cadillac wanted to power the new car with something kinda sorta production based. The new car will use a naturally aspirated 6.2-liter pushrod V8 that shares some base architecture with the engine in the current CTS-V. While the power output hasn't been announced, expect about 600 horsepower. While that's down compared to the CTS-V, there is far less mass to move around as the Dallara chassis is a svelte 2,050 lbs. Since all the teams will be running different engine configurations, expect restrictors of some sort to help balance the power disparity. The parts of the body work that can be modified - The nose, sidepods, rear wheel arches and rear valance - have all been designed to mimic Cadillac roadcar design elements. Even the wheels look like they were pulled straight from the CTS-V. The front splitter, the floor, and the diffuser are common elements shared with other DPi cars.

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

2016 Cadillac ELR gets more power, $9,000 price drop

Cadillac has announced a series of updates to the ELR for 2016 that promises to make the plug-in hybrid luxury coupe a more desirable proposition. Perhaps chief among them is a price drop of $9,005 compared to the slow-selling 2014 model. The news follows an announcement yesterday that the Chevy Spark would get a $1,500 price drop. Cadillac is quoting a net price for the updated ELR at $58,495, which is obviously substantially less than the $75k it was asking for the previous version. But it's important to note that the new price is listed after US federal tax credits. The 2014 model came in at $67,500 after the full $7,500 tax credit, so math tells us that Cadillac has slashed the price on the 2016 ELR rather dramatically by about nine grand with a new MSRP of $65,995. One big upgrade on the performance front is a 25-percent boost in output from the hybrid powertrain that marries a pair of electric motors to a 1.4-liter inline-four gasoline-burning generator. The increase is said to be enough to drop 1.5 seconds off the 0-60 time, now quoted at 6.4 seconds. It'll travel for up to 39 miles on electric mode alone, but with the generator spooled up will go up to 330 miles before needing to stop. The engine management software has also been updated and the regenerative braking system reconfigured as well, but GM's luxury division didn't stop at the powertrain, fitting the 2016 ELR with a raft of other enhancements. Visually there's a new grille with the marque's latest emblem embedded. The suspension has been stiffened, the steering recalibrated and the brakes optimized for better feel. Cadillac is also throwing in the previously optional Driver Assistance package of active safety systems as standard, with adaptive cruise control available as an option. And the infotainment system comes with OnStar, 4G LTE connectivity and on-board Wi-Fi. There's even a Performance Package available with 20-inch performance tires offering 10-percent better lateral grip, four-piston Brembo brake calipers up front to help reducing stopping distances by 12 percent, recalibrated dampers and steering and a thicker-rimmed steering wheel. Because of the higher rolling resistance tires, however, the Performance Package kills four miles off of the electric driving range.