*NISMO (#1) was forced to change the engine mapping of 3rd fresh engine just before the Saturday final race.
*Soft tire of Michelin didn't match the situation, and Warm-up performance of medium compound tire was inferior. So Michelin teams were forced to choose no-tire-change strategy. This decision was made after Saturday race. It was first time for Michelin to choose no-tire-change strategy.
http://www.as-web.jp/supergt/66817?all