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NASCAR tests news configurations in attempt to create more passing

  • c42fd813a7ea3222400f6a706700b286.jpg

    Drivers, from left, Trevor Bayne, Jeff Burton, and Denny Hamlin race through Turn 4 during a testing session for NASCAR Sprint Cup series auto race cars at Charlotte Motor Speedway in Concord, N.C., Monday, Oct. 14, 2013. (AP Photo/Chuck Burton) (The Associated Press)

  • 251a5cf4a7d03122400f6a70670009ef.jpg

    A crew member checks out the front spoiler of driver Denny Hamlin's car during a testing session for NASCAR Sprint Cup series auto race cars at Charlotte Motor Speedway in Concord, N.C., Monday, Oct. 14, 2013. (AP Photo/Chuck Burton) (The Associated Press)

  • 19a039baa7ce3122400f6a706700deb0.jpg

    Driver Denny Hamlin, left, talks to a crew member during a testing session for NASCAR Sprint Cup series auto race cars at Charlotte Motor Speedway in Concord, N.C., Monday, Oct. 14, 2013. (AP Photo/Chuck Burton) (The Associated Press)

A six-car NASCAR test at Charlotte Motor Speedway focused on the aerodynamic package for 1.5-mile tracks.

NASCAR had three different configurations that covered seven significant changes at Monday's test. The goal was to help drivers pass easier through more rear downforce or the creation of more turbulent air.

The manufacturers brought two cars each. Ford had Brad Keselowski and Trevor Bayne, Jeff Burton and Jamie McMurray were there from Chevrolet and Toyota brought Denny Hamlin and Brett Moffitt.

NASCAR vice president of Innovation Gene Stefanyshyn said the configurations came from computer simulation and wind tunnel testing, and the ideas needed to be tested on the track. Stefanyshyn's role at NASCAR's Research & Development Center is on the development of the race cars.