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How Indy 500's JR Hildebrand made an emergency pitstop in Goodland, Kansas

INDIANAPOLIS, In. – Race driver JR Hildebrand is an Indianapolis 500 celebrity, but last week on his way to Indy he was just another repair job at AlexÂ’s Radiator and Auto Repair in Goodland, Kansas. Well, not just any repair job. Hildebrand, a true car guy whoÂ’s just as comfortable driving his bagged 1960 Cadillac Coupe de Ville as he is a 230-mile-per-hour Dallara IndyCar, decided to pull the grand old ride out of storage in Boulder, Colorado, and cruise 1,100 miles to Indianapolis Motor Speedway. At 33, Hildebrand loves the classics, especially cruising in a ride nearly twice his age. It helps him separate from the pull of Twitter, Instagram and text messages before two weeks of foot-to-the-floor stress. Interstate 70 would be his perfect world. Except Â…           View this post on Instagram                       A post shared by JR Hildebrand (@jrhildebrand) “It was highly eventful for the first 300 miles,” said Hildebrand, who is practicing this week for his 11th start in the 500 on May 30.  The Caddy, a 390-powered pink beauty he calls Rosie, “had been sitting for a year, but it fired right up” and cruised just fine early in the trip. But as it approached the Colorado-Kansas state line, the suspension's airbag controller started flickering, the windows were slow to roll up, the gas gauge didnÂ’t work and the engine started to stumble. “IÂ’m thinking maybe IÂ’m only getting seven miles per gallon and IÂ’m out of gas,” Hildebrand said. “So I peeled off, ran a light and got to a gas station. It only took 12 1/2 gallons and was dead. ItÂ’s pretty unlikely that the collector in the fuel tank was leaving six gallons in this thing. I took a jump, and once I got it fired up, I got it back on the road and it ran fine for another 40 or 50 miles, and then the same thing started to happen. I pulled in and got another jump." (His wife Kristin was following behind in their Subaru, along with their dog). He stopped in Goodland and bought a new battery, “figuring the battery was toast at that point, whether that was the problem or not,” he said. “They did their diagnostics thing at the parts store, and it wasnÂ’t totally clear what was wrong.” Assuming the problem was somewhere in the charging system, he headed toward a nearby NAPA only to find it was closed. Along the way, though, he noticed AlexÂ’s Radiator and Auto Repair.

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

NHTSA investigating nearly 750,000 GM models over non-deploying airbags

Nearly 750,000 vehicles built by Chevrolet, GMC, and Cadillac are the subject of a National Highway Traffic Safety Administration (NHTSA) investigation due to non-deploying driver-side airbags. While the investigation is ongoing, the agency believes the issue is likely due to rust particles that form on the inflator's connection terminal interface. The list of nameplates included in the investigation includes Chevrolet's Silverado, Tahoe, and Suburban, GMC's Sierra, Yukon, and Yukon XL, plus Cadillac's Escalade, Escalade ESV, CT4, CT5, and XT4. All of the potentially affected vehicles are 2020 or 2021 models, according to a bulletin published on the NHTSA's website. Investigators launched the probe in April 2021 after 15 consumers reported airbag-related issues, including nine who said an airbag malfunction light appeared in the instrument cluster. More alarmingly, the NHTSA is aware of six accidents that caused significant damage to the car's front end yet didn't trigger the driver's airbag. It adds that there are no fatalities linked to the issue, but there are six crashes and eight injuries reportedly blamed on it. No evidence suggests this problem is related to the millions of potentially deadly Takata inflators recalled over the past few years. General Motors is aware of the defect. It sent a technical service bulletin (TSB) to its dealers in March 2021 to address the aforementioned warning light. The note explains the issue is due to "rust particles in the connection terminal interface of the driver's airbag inflator." The company hasn't issued a safety recall yet, however. Whether it will partially depends on the NHTSA's findings. It's currently looking into the scope and the severity of the problem, and it wants to understand its implications on driver safety. Investigators will decide whether General Motors needs to recall the 749,312 cars that are part of the probe when they close their investigation. General Motors has already spent a significant amount of money replacing defective airbag-related parts in its cars. In November 2020, it was ordered by the American government to recall nearly 6 million pickup trucks and SUVs equipped with potentially dangerous Takata airbag inflators. It repeatedly argued that testing proved the inflators were safe, and it petitioned the agency four times starting in 2016 to avoid a recall, which cost an estimated $1.2 billion (about a third of its net income in 2020).