The NASCAR Cup Series has long been regarded as the pinnacle of American stock car racing, but for drivers moving up from the Xfinity Series, the jump is far from straightforward. In a recent interview, Shane van Gisbergen and Connor Zilisch opened up about the steep learning curve they faced when stepping into the Cup environment, emphasizing how the cars behave in ways that feel almost alien compared to their previous experiences.
The leap to the Cup Series
Van Gisbergen, who captured his debut Cup victory on the streets of Chicago in 2023, credits that early success to being thrust into the deep end with Trackhouse Racing. The New Zealand-born driver explained that the transition required a complete re‑evaluation of braking points, corner entry speeds and overall car balance, especially when running in the slipstream of other competitors.
Zilisch, meanwhile, entered the Cup ranks after a dominant rookie season in the O'Reilly Auto Parts Series, where he secured ten wins from 33 starts. Despite that pedigree, the 23‑year‑old struggled to find grip on the new Next Gen platform, with his best finish to date being a modest 14th at Circuit of the Americas and a 16th on an oval at Texas Motor Speedway.
Dirty air and car dynamics
Both drivers highlighted the profound effect of dirty air on the new car's performance. Unlike the more forgiving Xfinity machines, the Cup Series cars lose significant aerodynamic efficiency when trailing another vehicle, causing a sharp drop in downforce and making overtaking a tactical nightmare. This phenomenon, they said, forces drivers to adopt entirely different racing lines and strategies.
The Next Gen chassis, introduced to standardise competition across tracks, brought new geometry, tire construction and aerodynamic packages that fundamentally altered how the cars interact with each other. Van Gisbergen noted that the combination of tighter tolerances and heightened sensitivity to turbulence makes the Cup Series feel like a different sport altogether.
Looking ahead to San Diego
The duo will next meet on the streets of Naval Base Coronado in San Diego on June 22, where the unique urban layout promises yet another set of challenges. Both drivers expressed optimism that the upcoming event could provide fresh insights into the evolving relationship between car setup and on‑track behaviour, and they hope the experience will further hone their adaptation skills for the remainder of the season.