The last track i raced on was a beautiful, tight, hard pack/abrasive clay with light white dust (almost like dry quickrete) NO loam (except the backside of a double jump that started breaking up by the main) .
I washed my tires with Dawn as usual, and went back to my TrackBite/Acetone mix on worn AKA soft Impacts (8th buggy). Its an outdoor track under the sun with track surface temp around 105 degrees, and traction was fantastic. I try and drive with minimal wheelspin/diff unloading and the goal is a setup that rotates w/o breaking loose... im not a point and shoot driver and HATE when car or track condition dictates 'wheeling it'.
The main came and the sun went down behind the trees (track temp was 82 degrees 10 minutes before my main). Overall traction felt like it dropped off 30%. Super softs same tread with WD40 would have been my choice if i had experienced this before (first time at the track) and knew the change was going to be so drastic.
With that said i wanted to bring up track surface temp and tire temp. The thing with diesel is most set the tire on fire after application (i use a heat gun if i going to use heat. Fire BAD). Heating a tire after application helps MOST tire compounds accept the additive... but try and run a tire as close to track temp as possible. Next time youre doing some quality practice laps, compare heated tire lap times to cool tire lap times and how the car feels...