Boost levels unchanged for Indy 500

IndyCar has confirmed that it will not change the boost levels for this weekend's Indy 500 for what it describes as "competition and safety" reasons. The series mandates a boost level of 130 kilopascals for Superspeedway events, although it added an additional 10 kPa for Fast Friday and both days of qualifying last week, resulting in an estimated 40-50 extra horsepower and speeds of more than 226mph