If you don’t want to micro-manage:
Community-collaborative spreadsheet — “Crowdsourced best setups” nascar+thunder+2003+setups+best
Require a lower ratio (e.g., 3.10 to 3.25) to maximize absolute top-end velocity. Best Setups for Key Track Types 🏁 Short Tracks (Bristol, Martinsville, Richmond) nascar+thunder+2003+setups+best
Springs control how the car handles bumps and weight transfer during braking, acceleration, and turning. nascar+thunder+2003+setups+best