I have 24+ years of hot road course laps in various mopars, so i may know something. JCC knows nothing about street driven cars set up for hot laps and how the lap times drop with changes made to the car over time and laps. The deflection is blah blah blah as it's the sum of the parts working together.
The people running road course laps are welcome to pm me and i will share my experiences and information, but since JCC is ruining this I have little to contibute on the thread
The concept is to set up the car so it rotates thru the turns at speed, i have such a car that rotates, has no cage, does not flex, rotates, handles flat, impresses everyone [track workers, instructors and participants] at the track [lol] and it runs the number for hot lap for my track on z rated full tread tires. It's a lot of fun when the car gets "inspected" by the lap time nerds.
Front and rear bars etc................................................................................
Autocross is not a good way to determine a cars total handling manners and never does it test the braking system as a road course does. This is not to offend yuse [sic] guys that like autocross - when you have cars like mine only hot laps will satisfy the craving for speed