Frame Off Restored Chevelle 502/502 Hp V8 5 Speed 3.55 on 2040-cars

Auto blog

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

Chevrolet SS previewed by Holden VF Commodore SS V show car

It won't be long before we see the official, production-ready Chevrolet SS sedan (hint: it will be revealed this weekend). And to tide us over until all of the official details are released about the US-spec version, we have this: the Holden VF Commodore SS V show car, a performance-oriented brother to the Calais V that debuted earlier in the week.
What we really want to know about the SS V is what lies underhood, but General Motors' Australian arm is keeping that under wraps until the Chevy model breaks cover this weekend. Nevertheless, it's obvious that the SS V will be a serious performer, with all sorts of aggressive cues driving that home on the car's exterior. Take a look at those 20-inch billet aluminum wheels that hide big Brembo brake calipers up front, the sculpted hood and front fascia, the wide air intakes with LED running lights and the quad exhaust pipes out back. It's like the Pontiac G8 GXP never even left us.
Inside, there's a sporty-looking interior with aluminum accents that mix in with black leather and suede surfaces, all tied together in the middle with an eight-inch MyLink touchscreen infotainment system. It looks great, and again, while we don't know anything regarding powertrain details, it makes us oh-so happy to see a manual shifter smack dab in the middle of the center console.

Watch the live reveal of the 2014 Chevy Silverado and GMC Sierra [UPDATE]

UPDATE: The trucks have been revealed. Click here for all of the official details.
As promised, Chevrolet and GMC are offering a live webcast of the world premiere for the all-new 2014 Silverado 1500 and Sierra 1500. After being teased with spy shots and blurry images like the one above for ages, now is the time to see the trucks in the metal, for real (well, as 'real' as it gets on a webcast, at any rate).
Shift your eyes down just below to see the reveal as it happens, starting at 9:30 AM EST. We anticipate having loads of images full technical information to share after the webcast, too, so truck aficionados should stay tuned. We'll also be bringing you live images of both trucks too, when we see them on the show floor at next month's Detroit Auto Show.