NASCAR will debut a new aerodynamic rules package for the NASCAR Cup Series in March at Phoenix Raceway, aimed to enhance the racing product at short ovals and road courses, the sanctioning body announced Tuesday.
The package features slight modifications to the Next Gen car that significantly decrease the downforce created by the vehicles. This configuration will be utilized at all tracks where “wet weather equipment” will be required: Charlotte Roval, Chicago Street Course, Circuit of The Americas, Indianapolis Motor Speedway Road Course, Martinsville, New Hampshire, North Wilkesboro, Phoenix, Richmond, Sonoma and Watkins Glen.
Chief among the changes are a two-inch rear spoiler (a reduction from the current four-inch blade on the rear deck lid) in addition to several tweaks underneath the car. Those include the removal of three diffuser strakes, engine panel strakes and trimming the diffuser’s outer fencing. All changes were run together during the second day of a January test at Phoenix.
“That basically adds up to about a 30% downforce reduction,” Dr. Eric Jacuzzi told NASCAR.com. “We’re now in a downforce level we haven’t been at since pre-2000s for sure — like mid ’90s.”
— NASCAR.com —