1970 Chevrolet Chevelle 396 Big Block With Build Sheet And Cold Ac on 2040-cars

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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.

How easy is it to rebuild a Chevy small block V8?

Chevrolet's famous small block V8 stands as one of the workhorse engines in American auto history, with its variants going into vehicles from hot rods to pickup trucks. But do you know that you can fully disassemble and completely restore one of these mills in just under four minutes? Well, as long as there's some assistance from time-lapse photography, that is. Hagerty created this short clip showing a dirt-covered small block turning from a frog into a prince. Thankfully, the time-lapse doesn't speed the process up too much, and it's still easy to see how all of the principal parts fit together. With all sorts of sensors and software helping to drive the modern automobile, viewing the internal combustion engine in its purely mechanical form is still fascinating. Related Video:

J.D. Power study identifies top seats for your tush

File under News your fanny can use: The seating systems in the Ford Escape and Edge, the Audi A3, Chevrolet Cruze, Kia Cadenza, Porsche Cayenne and Toyota Tundra received top marks in a new J.D. Power study on seating and seat belt quality and satisfaction. The J.D. Power 2017 Seat Quality and Satisfaction Study asked more than 77,000 new owners and lessees of 2017 model-year cars and light trucks to rate their vehicle's seats and seat belts within the first 90 days of taking ownership. The survey is broken up into seven vehicle segments and scored on total seat problems per 100 within each segment, with awards presented to the seating system supplier. Canadian auto supplier Magna won three of seven first-place awards for its seating systems in the A3, Escape and Edge. Ireland-based Adient got top marks for its seats in the Cadenza and Cayenne. Lear Corp. won for the Cruze, and Avanzar Interior Technologies scored highest for seats in the Tundra. J.D. Power says its study is intended for automakers and suppliers with quality and satisfaction information to be used in developing and marketing seating systems. "But the results are just as interesting to a consumer audience," the company says. "After all, some drivers spend a considerable amount of time behind the wheel, and it's helpful to know which vehicles offer the most comfortable seats for those long commutes." Ain't that the truth. Ford was the only automaker whose seat systems, both manufactured by Magna, received top honors in two segments: the Escape for mass-market compact SUV and the Edge for mass-market midsize/large SUV. J.D. Power says it used 22 attributes to measure seat quality, three measures of seat belt quality and 12 to measure satisfaction. Awards were presented to the seating suppliers. Related Video: Image Credit: Audi Auto News Design/Style Audi Chevrolet Ford Kia Porsche Toyota Safety JD Power seats