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This is what a 2017 Chevy Camaro Z28 could look like

The latest Camaro Z28, the enthusiast darling of the somewhat frumpy fifth-generation pony car, only hit the scene in 2014. It housed the wonderful 7.0-liter, naturally-aspirated LS7 small block V8 and featured a ton of aero bits. The trickest pieces may have been the dynamic spool valve shocks, legitimately race tech for the road. So with the new Camaro out in the wild, we were wondering what a new Z28 might look like, and thus, commissioned these renders based on our best guesses as to what a future Z28 might be. Since Chevy didn't stray too far from the Zeta-chassis Camaro formula with its new Alpha-based car, our vision of a new 2017 Camaro Z28 likewise is a sequel rather than a reboot. The exterior styling and aero details are similar, but sleeker. The defining and protruding front splitter is back, but it's smoothed slightly and better integrated. It shares quad exhaust pipes with the lowlier SS, but they're of the beveled Z06 variety, and sized up to a howitzer caliber. Instead of a weak faux rear fender vent, our version gains a real brake cooling duct. Some iconic elements, like the hood extractor vent and the large decklid spoiler, remain. What we can't see, we have to speculate on. As the track-focused, hardcore pony car in the Camaro lineup, the Z28 will have to do battle with the Ford Shelby Mustang GT350R. There's simply no avoiding it. And whereas Ford distinguished that car with a 5.2-liter, 526-horsepower, flat-plane-crank V8, Chevy is likely to look to the parts bin to find motivation. This isn't a knock; the LS and LT-series small block V8s are both numerous and power-dense. And there's one engine that seems to do the trick: the LSA, last seen in the old CTS-V and still on sale in the Camaro ZL1 (and of course, still being produced as a crate engine). In ZL1 form, the LSA makes about 580 hp, which is a nice margin over the GT350R. It's also a high-zoot but not top-of-the-line mill, having been mostly superseded by the 650-hp LT4. That puts our probable Z28 far enough behind the new CTS-V and current Corvette Z06 in the pecking order to be a safe bet, without hobbling it with the LT1 shared with the Camaro SS and regular Corvette. Will those trick spool-valve shocks from Multimatic make it to the Z28 again? Ford is taking the GT350R very seriously, and if the expensive but supremely capable suspension system is required to manhandle the Shelby at the track, you can bet that Chevy will pony up for it.

Nissan Leaf sells 1,553 in April, Volt climbs to 905

After three months in the 500 and 600 range, sales of the Chevy Volt climbed to 905 in April. That's up for the year so far – likely due to increasing discounts – but still down 41.5 percent from April 2014. As we've been saying every time the Volt turns in less-than-exciting monthly sales numbers, we suspect a large number of potential Volt buyers are waiting for the next-gen model to arrive in the second half of 2015. While the price for that car has not yet been announced, the updated tech specs show that it will probably be worth the wait for drivers who want the latest and greatest. Over on the Nissan Leaf side of things, April sales were 1,553 units this year. That's the second-best month of the year but down from the 2,088 units sold last April. After the Leaf finally climbed to the top of the cumulative best sellers list for plug-in vehicles last month, the difference between these two leaders is now 1,824 in favor of the Leaf. Nissan says that sales were influenced by the launch of its No Charge To Charge promotion in Indianapolis and Fresno, CA. This deal gives new Leaf buyers and lessees two years of no-cost quick charging in these markets. No Charge To Charge is not available in 15 US markets for (San Francisco, Sacramento, San Diego, Seattle, Portland, Nashville, Phoenix, Dallas-Ft. Worth, Houston, Washington, DC, Los Angeles, Chicago and Atlanta) and will expand to 10 more by the middle of this year. As we do every month, our full wrap-up of US green car sales is coming soon. For now, enjoy discussing these sales figures in the Comments below.

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