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Honda, Chevy reveal low-drag speedway aero for Indy 500

As the two automakers currently participating in the IndyCar Series, both Chevy and Honda were invited this year not only to provide engines to the teams on the starting grid, but to develop their own aerodynamics packages as well. Both revealed their designs for the road-course races a few months ago, but with the Indy 500 approaching at break-neck speed, they've now unleashed their aero approaches for speedways. Both are based on the Dallara DW12 chassis introduced to the series a couple of years ago, but sacrifice some of their downforce at the altar of speed. And you can tell as much from looking at them: both Honda (above) and Chevy (below) have streamlined their designs, with single-plane front wings, lower-profile rear wings and fewer winglets on the body and around the wheels in between. The idea is to allow the cars to reach higher top speeds with less drag, while offering the necessary amount of downforce for the banked turns. With the four opening road-course rounds complete, teams using either automaker's equipment will keep the existing aero kits on their cars for the Grand Prix of Indianapolis on the infield course next week, then switch to the speedway package for the Indianapolis 500 later this month. Then it'll be back and forth for the rest of the season as the circus switches between road courses and speedways. Honda Unveils 2015 IndyCar Super Speedway Aero Kit Apr 30, 2015 - SPEEDWAY, Indiana - To be used at the Indianapolis 500 - Manufacturer seeking 11th Indianapolis 500 victory since 2004 - First public running to take place Sunday at Indianapolis Honda today debuted the "Super Speedway" aero kit of aerodynamic upgrades and components its teams will use at this year's 99th running of the Indianapolis 500. The Honda Super Speedway Aero Kit, produced by Honda Performance Development, Honda's racing arm in North America, includes a variety of individual aerodynamic components fitted to the existing Honda-powered Dallara Indy car chassis. All are intended to give Honda's six Indy car teams – encompassing a potential 17 '500' entrants - the ability to maximize performance at the 2.5-mile Indianapolis Motor Speedway oval and other large ovals ( over one mile in length) on the 2015 Verizon IndyCar Series schedule. "We're excited to unveil our Super Speedway aero kit, the newest element in this era of enhanced manufacturer competition in the Verizon IndyCar Series," said Art St. Cyr, president of HPD.

'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).

There's an impending shortage of new trucks in America's heartland

URBANDALE, Iowa — Jerry Bill is worried the novel coronavirus could hurt business at the Des Moines auto dealership he runs, but not because of a shortage of buyers for the big Ram pickups on his lot. "Our biggest issue will be if we don't get more inventory," said Bill, general sales manager of Stew Hansen Chrysler Dodge Jeep Ram, which sells around 2,700 new vehicles a year in Urbandale, a suburb of Iowa's capital Des Moines. After a drop in sales in April when consumers stayed home, Bill expects pickup truck sales to end May similar to where they were a year earlier. And if demand remains strong, Bill said he will run out of popular models in June. Fiat Chrysler began slowly restarting Ram truck assembly lines on Monday after a two-month shutdown. The U.S. economy contracted in the first quarter at its sharpest pace since the Great Recession of 2007-2009 because of lockdown measures aimed at slowing the spread of the coronavirus. Economists warn the second quarter will be much worse. Still, far from the lockdowns of states like New York, Michigan or Ohio, dealerships like Stew Hansen have provided FCA and Detroit rivals General Motors and Ford a rare bright spot: strong sales of pickup trucks in America's heartland. Overall U.S. sales of cars and light trucks crashed to the weakest pace in 50 years last month. But sales of big Detroit brand pickups, particularly in southern and western states less affected by the outbreak, significantly outperformed the market, industry executives and analysts said. Pickup trucks are one of the most profitable automotive segments in the world. They account for a huge portion of the Detroit automakers' profits and formed a huge lure for Peugeot, which expects to merge with FCA by early 2021. The pressure is now on to boost pickup truck production and send vehicles to dealers in parts of the country with dwindling supplies. That is particularly true for GM, which is running short of certain truck models after losing 40 days of production to a strike last fall. "If you don't have what someone wants, they can choose to go to another brand," said Cox Automotive analyst Michelle Krebs. 'Easiest swap ever' Detroit automakers in March rolled out large discounts — such as interest-free loans for seven years — to keep vehicles rolling off dealer lots.