Indianapolis Motor Speedway Roadcourse, SCCA config. My best lap over 3 days (too much traffic to ever get open track). Stock LS3 crate engine in 2650 lb. 944 track car "FrankenPorsche". 90 degree temps so 8 track day, 30+ heat cycle DOT RE71R tires quickly heated. Also engine power down a little from heat as I'd seen 150 mph on front straight other sessions. Mid Ohio PCA.