1995 Chevy Blazer S10 on 2040-cars

Auto blog

Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.

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

Seventies super-salesman challenges new car-sales record

Some of the fondest memories from my youth were the Sunday afternoons spent walking between rows of new and used cars. This preceded the advent of widely available internet, so the cars didn't sell themselves online: A tentative buyer had to come see the cars in the metal, with old-school salesmen taking well-earned smoke breaks after putting someone behind the wheel of a new Saab 900. All-inclusive subscription services were unheard of. If you open a Guinness records book and look up car salesmen, you'll find Joe Girard. The definitely old-school Detroit salesman regularly sold over 1,000 new cars per year, with a particular high point of 1,425 cars in 1973 guaranteeing him a mention in the Guinness book. To reach that kind of sales figure, you had to be a pretty special salesman, and Girard was. He didn't take breaks unless absolutely necessary, and even his lunch hours were dedicated to selling more cars instead of shooting the breeze with other sales persons. By 1977 he was worn through, having sold over 13,000 cars in his career, and his physique couldn't take it anymore. He's been a motivational speaker since. Now, 44 years later, a Dearborn, Mich., Cadillac and Chevrolet salesman named Ali Reda has reportedly broken Girard's record. The books at Les Stanford Chevrolet Cadillac say Reda sold 1,530 new cars and 52 used cars in 2017, averaging 130 vehicles per month. But after Girard, 89, heard of the sales record, he called his attorney, not letting his record be broken without a fight — or at least an audit. The Dearborn dealer isn't too concerned about Girard's doubts, at least according to Gary Stanford, whose father founded the dealership. "It's very official, trust me," said Stanford to the Detroit Free Press. "Ali is the hardest worker I've ever seen. And if someone doesn't believe the data, well, they're more than welcome to consult with GM. It's all there in black and white." What Girard doesn't get is that Reda was honoring him with the accomplishment. "I read his book, 'How to Sell Anything to Anybody,' and it said it would teach you how to become the best," said Reda, who at age 44 was a newborn when Girard hit his peak. "He's an absolute legend in the industry. Your whole career, you're chasing his name.