1972 Chevy Custom K20 Long Bed 350 Small Block V8 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

Our favorite mid-engine Corvette theories and rumors

The mid-engine Corvette! We just saw blurry photos through the foliage, and are hearts are all aflutter because it means that this car is real. And it's the most " never before" Corvette since 1984. Which leads us to all kinds of wacky theories and speculation. Everybody knows something or heard from a guy. None of those guys (or gals) from GM are talking to Autoblog, to be clear. But that won't stop us from stirring the pot. Let's go over a few point-by-point. The pushrod engine will be replaced by an overhead-cam V8 Car and Driver has repeatedly reported that an overhead-cam engine will come after the mid-engine Corvette's debut with an old-school pushrod. We've heard the same thing firsthand, albeit from a source with no connection to the development of the Corvette or powertrain. "At some point two valves can't pass future emissions regulations," said the guy we know. While the pushrod engine is compact, the design makes it difficult - if not impossible - for sophisticated variable valve timing (and lift) systems that control combustion with more precision. Hasty conclusion: The pushrod engine has a finite life in front of it. This one's a lock, it's a just a matter of when. Bowling Green's new paint shop is really the mid-engine assembly line Credit to Reddit for this one. Like we said, everybody knows a guy. But let's look deeper. The new paint facility costs $439 million dollars and adds 450,000 square feet, almost half the size of the existing plant. Plus GM announced another $290 million in upgrades at Bowling Green Assembly. That sure sounds like a lot of money, but you can actually spend that much on a paint booth. Porsche spent 500 million Euros (about $561 million dollars) to add the Macan assembly to its Leipzig, Germany plant in 2014. Chrysler shelled out $850 million for a paint shop in Sterling Heights, Michigan. GM spent $600 million for a new paint shop at the Fairfax (Kansas City) plant. Honda, on the other hand, is working on a thrifty $210 million project in Marysville, Ohio that includes a 300,000 square foot expansion, and the low-volume Acura NSX facility only cost $70 million. Hasty conclusion: The square footage and cost could easily mean a new assembly line instead of (or in addition to) a paint line. And if the NSX plant was really that cheap, GM could have hidden a similar sum in its existing announcements.

Want a V8 on the cheap? Buy a work truck

In case you didn't notice, V8 cars have gotten pretty expensive. If you want a modern muscle car like the Dodge Challenger R/T, Ford Mustang GT, or Chevy Camaro SS, you'll need between $34,000 and $38,000 for a stripped out example of one. The cheapest of those is the Challenger, and the priciest is the Camaro. These are also the cheapest V8 cars the companies offer. But if you absolutely have to have a V8 for less, there is an option, work trucks. As it turns out, all of the Big Three offer their most basic work trucks with V8s. And because they're so basic, they're pretty affordable, especially when sticking with the standard two-wheel drive. A Ram 1500 Tradesman with a V8 can be had for as little as $29,840, which is a little more than $4,000 less than a Challenger R/T. For a bit more at $30,275, you can have a Chevy Silverado W/T, almost $8,000 less than a Camaro SS. The most expensive is the V8 Ford F-150 starts at a starting price of $30,670, which is a bit over $5,000 less than the Mustang. Of course you'll be in an ultra bare bones vehicle with few comforts, and the price will go up if you add stuff, but we're bargain hunting here, and sacrifices are sometimes necessary. Besides, what you lose in comfort, you gain in loads of cargo space and towing (try to look at the bright side). Also, as a side note, all three trucks are available with optional electronic locking rear differentials. At the discounted price of these trucks, you still get a heaping helping of power. The most potent of the trio is the Ram 1500 Tradesman with 395 horsepower and 410 pound-feet of torque generated by a 5.7-liter V8. Compared with the Challenger R/T, the Ram is up by 20 horsepower and they're tied for torque. The value proposition is even more stark between the two vehicles when looking at the price per horsepower. Each pony in the Ram costs $75.54, while the Challenger charges you $90.91. The Challenger is also more expensive per horsepower than its close competitors. The F-150's 5.0-liter V8 is just barely behind the Ram with 395 horsepower and 400 pound-feet of torque. That's still more power than the Challenger, and it matches the torque of the 2017 Mustang GT. On the down side, it still would be down 20 horsepower on that same 2017 Mustang, and it's behind by 60 horsepower and 20 pound-feet on the new 2018 Mustang GT. The F-150 also just edges out the Mustang in the dollar per horsepower measure.