Goodyear recommends air pressure be 18 psi in the Left Front, 17 psi in the Left Rear, 37 psi in the Right Front, and 33 psi in the Right Rear.
It is only my untrained eye but it seemed to me that IMS was more crowded and congested Friday than Saturday. It wasn't that difficult getting into the track, and the crowds certainly seemed to have thinned out or spread out considerably. Friday the paddock area around the garages and pit lane was chockablock with NASCAR fans, all waiting for a chance to see or visit their driver. There were all kinds of Photo Ops and driver autograph sessions, show and tell that drew the fans to the garage area. Saturday it was easier to walk around as the fans spread out over the large acreage in the warm sunshine.
During Qualifying the temperature was in the eighties, humidity was 35 percent and the winds 20 mph. By the time Happy Hour was over, some scattered clouds had rolled in and the wind picked up.