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Rosamond, CA
No public description is available for this track.
“Whether on a road course or an oval, perhaps the most difficult corner for any race driver is the fast one, the one that can ultimately be taken flat out. At first, ease out of the throttle well before the corner on the straightaway to reduce speed enough to make you confident. Then get back on full throttle prior to turning into the corner.”
Ultimate Speed Secrets — Ross Bentley
T1 at Big Willow is one of the most demanding commitment corners in American motorsport — a long, high-speed left that builds lateral load progressively. Bentley's approach of scrubbing speed early and committing to full throttle before turn-in is the key to T1. Lifting mid-corner at 100+ mph will pitch the car into oversteer. Build up to flat-out entry over multiple sessions.
“Aerodynamic downforce increases the tires' cornering ability, and the faster a car turns the sooner it will see the checkered flag. The significance of aerodynamic downforce to race cars, and the increase in its implementations in recent years, is demonstrated by major improvements in race car performance, especially on tracks with numerous high-speed, unbanked turns.”
Race Car Aerodynamics — Simon McBeath
Willow Springs' extreme lateral loads at sustained high speed make aerodynamic grip a significant factor. McBeath's point about downforce on "high-speed, unbanked turns" describes T1 precisely. Cars with aerodynamic aids will find a massive advantage here; cars without wings must rely entirely on mechanical grip, making tire compound and pressure selection critical to surviving the sustained lateral loading.
“The basic rule with asphalt is that the rougher the surface, the better the grip, because it gives the tires something to bite on. Conversely, the smoother or more worn it becomes, the less grip it has. Visually, when you notice a sheen on the surface, especially in warmer months, you can expect reduced grip.”
How to Drive — Ben Collins
Willow Springs' abrasive surface generates extreme tire temperatures under sustained lateral loading. Collins' surface-grip relationship is amplified here: the rough, abrasive surface provides excellent mechanical grip when tires are in their operating window, but the heat buildup from high-speed cornering can push soft compounds past their thermal limit. Monitor tire temperatures across sessions — when the surface sheen appears in the desert heat, expect reduced grip and adjust your commitment level in T1 accordingly.
Find HPDE organizers, car clubs, and sanctioning bodies that run events at Willow Springs International Raceway.