AMSOIL USAC Sprint Car 2025 - Season 4

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2025 Season 4 - Races hourly at :45
Based on its real world counterpart that hearkens back to names like Jones, Foyt, and Andretti, the iRacing AMSOIL USAC National Championship pits top dirt track sim racers against one another in 410 Sprint Cars on some of the most challenging - and famous - dirt tracks in America.

Wings? We don't need no stinking' wings . . . just ask Parnelli, AJ and Mario—or for that matter, Jeff Gordon, Tony Stewart and Kyle Larson.

Overview

  • Category: Dirt oval (3)
  • Track Types: dirt_oval
  • License Group Types: 4
  • Car Classes: [94]
  • Car Types: dirt, dirtoval, sprintcar
  • Allowed Licenses: Class C 4+, Class B, Class A, Pro, Pro/WC
  • Allowed Season Members:

Schedule

Week Track Duration Summary Weather
Week 1
(Sept. 16, 2025)		 Limaland Motorsports Park
(2025-09-20T18:15:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 19.5 to 20.2
  • Wind 12.3 to 16.4
  • Dir 5
  • Skies 0 to 0
  • Rain 0 (0 %)
  • None
Week 2
(Sept. 23, 2025)		 Lucas Oil Speedway
(2025-09-27T13:25:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 25.4 to 26.5
  • Wind 9.4 to 10.5
  • Dir 6
  • Skies 0 to 1
  • Rain 0 (0 %)
  • None
Week 3
(Sept. 30, 2025)		 Lanier National Speedway Dirt
(2026-05-01T19:00:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 22.7 to 23.9
  • Wind 9.4 to 12.6
  • Dir 6
  • Skies 1 to 2
  • Rain 0 (0 %)
  • None
Week 4
(Oct. 7, 2025)		 The Dirt Track at Charlotte
(2025-10-11T13:35:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 21.1 to 21.9
  • Wind 16 to 16.5
  • Dir 4
  • Skies 1 to 3
  • Rain 0 (0 %)
  • None
Week 5
(Oct. 14, 2025)		 USA International Speedway Dirt
(2025-10-18T17:40:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 21.9 to 23.7
  • Wind 20 to 23.3
  • Dir 3
  • Skies 0 to 0
  • Rain 0 (0 %)
  • None
Week 6
(Oct. 21, 2025)		 Fairbury Speedway
(2026-05-01T14:20:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 21 to 21.4
  • Wind 25 to 27.1
  • Dir 5
  • Skies 1 to 2
  • Rain 0 (0 %)
  • None
Week 7
(Oct. 28, 2025)		 Lernerville Speedway
(2026-03-01T16:40:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 18.7 to 18.7
  • Wind 8.2 to 9.2
  • Dir 4
  • Skies 2 to 2
  • Rain 0 (0 %)
  • None
Week 8
(Nov. 4, 2025)		 Volusia Speedway Park
(2025-11-08T12:20:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 20.7 to 21.9
  • Wind 27.8 to 29.4
  • Dir 6
  • Skies 1 to 1
  • Rain 0 (0 %)
  • None
Week 9
(Nov. 11, 2025)		 Eldora Speedway
(2026-04-01T18:40:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 18.5 to 18.4
  • Wind 20.2 to 29
  • Dir 0
  • Skies 1 to 1
  • Rain 0 (0 %)
  • None
Week 10
(Nov. 18, 2025)		 Knoxville Raceway
(2025-11-22T12:30:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 18.9 to 19
  • Wind 13 to 13.4
  • Dir 7
  • Skies 2 to 2
  • Rain 0 (0 %)
  • None
Week 11
(Nov. 25, 2025)		 Kevin Harvick's Kern Raceway Dirt Track
(2026-04-01T18:00:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 19 to 19.2
  • Wind 31.2 to 33.6
  • Dir 6
  • Skies 2 to 3
  • Rain 0 (0 %)
  • None
Week 12
(Dec. 2, 2025)		 Kokomo Speedway Tires in
(2026-04-01T13:55:00 1x ) 		No. Of Laps: 30
  • Start Type: Rolling
  • Start Zone:
  • Temp: 24.1 to 25.7
  • Wind 5.7 to 8
  • Dir 6
  • Skies 0 to 1
  • Rain 0 (0 %)
  • None

Configuration

  • Official
  • Rookie
  • Season
    2025 S4
  • Regional Comp.
  • Race Week
    3 (0)
  • Drop Weeks
    4 of 12
  • Multi Class
  • Fixed Setup
  • Drivers
    1 <> 1
  • Cross License
  • Driver Changes
  • Pit Lane Crashes
  • Incident Limit
    12
  • Warn Mode
    0
  • Warn Param 1
    0
  • Warn Param 2
    0
  • Caution Types
    4 /
  • Caution Laps Count
  • GW Checkered Limit
    0
  • Lucky Dog
  • Conduct Rule Mode
    0
  • HardCore Level
  • Car Switching
  • Start on Qual Tyre
  • Short Parade Lap
  • Start Zone
  • Qualifier Starts
  • Heat Racing
  • Num Opt Laps
    0
  • OP Duration (mins)
    120
  • Send to OP.
  • Ignore OP License.
  • OP Session Type.
    170
  • Starters
    6 <> 20
  • Grid By Class
  • Active
  • Complete
  • Diff. Race Tyres
  • Super Sessions
  • Member Restriction
  • Car Restriction
  • View Restriction
  • Start
    2025-09-16… (1)