"After evaluating a variety of options and speaking with all engine manufacturers, we feel it is best from a both a competition and safety standpoint to maintain the current superspeedway boost level for our Lotus-powered entrants," said Will Phillips, vice-president of technology, INDYCAR.
"At this point, there are too many unknown variables in allowing an engine to run a full-race distance at the increased boost level, so it's something we are going to need to explore further. At the beginning of the season we mandated there would be no changes to performance regulations prior to June 18, and we plan to maintain that time frame."
Beaux Barfield, president of competition for INDYCAR, added: "From a safety standpoint, we will be keeping a close eye on speeds as the race progresses to ensure that all cars are within 105 percent of the race leader's pace. We want to make sure that we are managing the speeds and car placement as the drivers navigate through traffic."