Firestone advise against running when track and ambient temperatures don’t add up to 100degF and for most of this week, Speedway, IN has been struggling to reach that number.
This week’s 2.4-liter engine test, conducted by Team Penske-Chevrolet and Chip Ganassi Racing-Honda on a slightly modified version of IndyCar’s standard road course layout, had to be extended to three days after cold and rain hampered meaningful running on the first two days.
