1941 Chevy Pickup Street Rod on 2040-cars

Auto blog

'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).

GM recalls select Chevy Cruze, Sonic and Buick Verano models over airbag issue

General Motors is recalling certain 2012 Buick Verano, Chevrolet Cruze and Sonic models due to a defect in the driver's airbag system. According to the National Highway Traffic Safety Administration, the airbag has a shorting bar which may contact two internal terminals. If that happens during a crash, the supplemental restraint may not deploy, increasing the risk of driver injury. The recall includes a total of 2,949 units.
GM will contact owners and replace the steering wheel airbag coil at no cost. At this point, it's unclear when the recall will begin, though owners may contact the automaker at 1-800-521-7300 for more information. You may also take a closer look at the full NHTSA notice below.

2015 Green Car Of The Year finalists announced, run alt-fuel gamut

The 2015 edition of the Green Car of the Year award is following right in the footsteps of previous years with a variety of alt-fuel powertrains making the just-announced finalists list. You've got your plug-in vehicle (the BMW i3), your compressed natural gas (the Chevy Impala Bi-Fuel), your high-efficiency diesel (the Audi A3 TDI), your 40+ mile-per-gallon gas engine (the Honda Fit) and, finally, a car that can do a little bit of everything (the VW Golf). The Golf is available – at least in some parts of the US – with three different powertrains: a 2.0-liter diesel, a gasoline engine and all-electric drive. The Impala can burn either natural gas or gasoline in its 3.6-liter engine. The A3 is an efficiency champ, able to get 73.5 mpg on some European tests. The i3 can be a pure electric vehicle or come with a short range extending engine. And the Fit brings 41 miles to the gallon in a practical, affordable package. The GCOY award is announced every year at the Los Angeles Auto Show by Green Car Journal. The committee doesn't just take the fuel-saving technology into account, but also a vehicle's "availability to the mass market." Last year, the Honda Accord Hybrid/Plug-In Hybrid won top honors, following up on wins from the Ford Fusion models (plug-in hybrid and hybrid) for 2013, the Honda Civic Natural Gas for 2012 and the Chevrolet Volt for 2011. FINALISTS ANNOUNCED FOR 2015 "GREEN CAR OF THE YEAR"" Green Car Journal to Reveal Winner of 10th Annual Award at LA Auto Show" Press & Trade Days, November 20 LOS ANGELES, CA (October 21, 2014) – Green Car Journal has announced its five finalists for the magazine's high-profile 2015 Green Car of the Year® program. The 2015 models include the Audi A3 TDI, BMW i3, Chevrolet Impala Bi-Fuel, Honda Fit, and VW Golf. The Green Car of the Year® award, an honor widely recognized as the auto industry's most important environmental accolade, celebrates its 10th anniversary this year. An increasing number of vehicle models are considered for the Green Car of the Year® program each year, a reflection of the auto industry's expanding efforts in offering new vehicles with higher efficiency and improved environmental impact. Green Car Journal has been honoring the most important "green" vehicles every year at the LA Auto Show, since its inaugural award announced at the show in 2005.