Motorola R7 Noise Settings

Hi everyone. I work in motorsports and recently acquired some R7's and I love them and I am learning more about them everyday and that includes programming. I am hoping to find out what the best recommended audio settings are for a consistent noisy environment (over ~110db) like a race track. I currently have the Intelligent Audio Response on as well as - AF Suppressor, AGC On, Noise Suppressor to AI Level 2.

Are there any other settings I should look into? Also what should my Fast Noise Suppressor Training Period be set to?