Kyle Larson growing frustrated as Indianapolis 500 prep goes slower than...

Frustration began to build for Kyle Larson on his third day of Indianapolis 500 preparations as work to his Arrow McLaren car kept him off track for a huge chunk of the session.

Rain washed out all day Tuesday and Larson got just two laps on track before the sky opened. Half of Wednesday was lost because of rain and Larson only managed 47 laps with a top speed of 225.245 mph as he learned how to run in traffic.

Larson wanted to use Thursday, the first sunny day and a full eight hours of scheduled track time, to continue to adapt to an Indy car ahead of his debut in the May 26 “Greatest Spectacle in Racing.” But Arrow McLaren made an early-day engine change before Larson got 11 laps on track.

Then McLaren called him back to the garage to make extensive setup changes to the No. 17. With rain scheduled again for Friday, the day before qualifying begins, McLaren wanted Larson to get into a qualifying setup in case “Fast Friday” is a washout.

Larson is trying to become the fifth driver in history to run both the Indianapolis 500 and NASCAR’s Coca-Cola 600 in the same day. Tony Stewart in 2001 is the only driver to complete all 1,100 miles.