I've noticed you put in different sets in the upgrades menu.
Sadly, not many of us can start something with those frequencies data, i'd suggest names like "track", "sport", "normal road" and so on...
And different levels of weight reduction as trackday tuning would be nice and add a lot to the immersion.
Example:
road set, stock springs and dampers
sport set, limited adjustable suspension
track set, fully adjustable.
I hope you understand, some sort of realistic mechanical tuning.
Maybe start with limited credit and "earn" the upgrade credits, like ZR challenge by ISI.