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Stewart flagged for not weighing in: #14-Tony Stewart opened Speedweeks with a weighty -- and heated -- issue. Stewart was visibly upset Friday as he stormed through the garage after getting black flagged for failing to step on a scale before getting behind the wheel. Stewart was one of 25 drivers practicing for Saturday night's exhibition Sprint Unlimited, but one of just three who didn't weigh in before the session started. Joe Gibbs Racing teammates #11-Denny Hamlin and #18-Kyle Busch also had to return to the scale after getting in their cars. Stewart didn't heed the initial call. NASCAR eventually flagged Stewart, ordering him back to the garage to get weighed. But he refused, and when he did finally park his car after his practice run ended, Stewart and crew chief Chad Johnston were called to the NASCAR hauler for what likely was a stern lecture about following the rules. They emerged 10 minutes later, and Stewart headed straight for the scale. Stewart refused to answer questions about what happened on the track and in the hauler, but was overheard telling teammate Kevin Harvick's crew that he was called in because he didn't weigh in and didn't heed the black flag. Each driver is required to step on the scale so the minimum car weights can be calculated. Heavier drivers, like Stewart, can have slightly lighter cars.(ESPN)(2-14-2015)

NASCAR no longer regulating minimum air pressure requirements: NASCAR will not regulate minimum air pressure requirements this season, giving crew chiefs more control of how little they put in their tires but also increasing the risk of a blowout. Goodyear will continue to provide teams with a minimum tire pressure recommendation. Previously, NASCAR mandated the right front tire pressure and, in some cases, left-front tires. Now, it is up to teams to determine how low they inflate their tires. Robin Pemberton, senior vice president of competition, said NASCAR is allowing teams to police themselves in this area. "With Goodyear constantly working on their communications with the teams on tire durability, it's putting it in the team's hands for different strategies,'' he told NASCAR Talk Friday at Daytona International Speedway. "How low they think they can go.'' Greg Stucker, Goodyear's director of race tires sale, said: "(Teams) have to make those calls. We try to give them as much data as we can for them to make those types of decisions.'' Pemberton said officials are working on having a tire pressure monitoring system on the dashboard to give drivers a warning when tire pressure is too low. Pemberton said that the system is "a ways away" from happening.(NBC Sports)(2-14-2015)