2008 Chevrolet Silverado Chevy 2500hd Crew Cab Duramax Diesel 4x4 Lifted Truck! on 2040-cars

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Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

Auto sales in March and first quarter down nearly across the board

Nearly every major automaker reported weak U.S. sales for March and the first quarter of 2019, citing a rough start to the year, but said a robust economy and strong labor market should encourage consumers to buy more vehicles as 2019 rolls on. GM, which no longer releases monthly sales figures, saw first-quarter sales fall 7 percent, with declines across all brands. Sales of Silverado pickup trucks fell nearly 16 percent and the high-margin Chevy Suburban large SUV dropped 25 percent. Ford also no longer releases monthly sales numbers, but is due to release its first-quarter sales figures on Thursday. According to industry data, Ford's sales fell 2 percent in the quarter and 5 percent in March. Ford representatives did not immediately respond to requests for comment. FCA reported a 7 percent fall in U.S. sales in March and a 3 percent drop for the first quarter. All of FCA's brands dropped in March, except for Ram, which saw a 15 percent increase in pickup truck sales. "The industry had a tough first quarter, but with spring finally starting to show its face and continued strong economic indicators ... we are confident that new vehicle sales demand will strengthen going forward," FCA's U.S. head of sales, Reid Bigland, said in a statement. Toyota reported a 3.5 percent fall in U.S. sales in March and 5 percent for the first quarter, hurt by declining demand for its Corolla sedans and Camry vehicles. "While some of our competitors are abandoning sedans, we remain optimistic about the future of the segment," Toyota said in a statement. Nissan posted a 5.3 percent drop in sales in March, and its first-quarter sales were down 11.6 percent. Honda and Hyundai bucked the trend. Honda's U.S. sales rose 4.3 percent in March and 2 percent in the quarter, while Hyundai's were up 1.7 percent and 2.1 percent, respectively. Passenger-car sales suffered throughout the January-March quarter compared with the same period in 2018 as Americans continued to abandon them in favor of larger, more comfortable pickup trucks and SUVs, which are far more profitable for automakers. The battle for market share in the particularly lucrative large-pickup truck market intensified in the quarter, as Fiat Chrysler Automobiles' Ram brand outsold the U.S.' No. 1 automaker General Motors' Chevrolet-brand trucks. The two automakers have both launched redesigned pickup trucks.

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.