Event Schedule: Summer Shift
June 10-11, 2023 at Buttonwillow Raceway Park
WERC 5-hour enduro, SERC 3-hour enduro (daylight-only race)
HPDE, Time Trial, Racing
Online registration ends June 7!
Track Map
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Paddock Map
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Track Information
Directions are HERE.
Gates open 24 hours.
Dyno at 7’s Only
Tech: Fri. 3-5; Sat. 7:30-4; Sun. 7:30-3
Track website is HERE.
Teams and Drivers
Make sure all drivers have registered; transponder # is correct; vehicle information is accurate.
Results and grids are ONLINE ONLY.
- Check them HERE.
Here are the rules:
Race Groups
Group A: SE30, SE46
Group B: 944 Spec, Honda Challenge, Spec Miata
Group C: Miata Super Cup, NP01, Super Touring, Thunder Roadster
Group D: WERC, SERC
Saturday, June 10, 2023
| Duration | Start | Session |
| 0:30 | 8:00 AM | HPDE/TT Mandatory Drivers’ Mtg. |
| 0:15 | 8:00 AM | RACE GROUP A-B WARMUP |
| 0:15 | 8:15 AM | RACE GROUP C-D WARMUP |
| 0:25 | 8:30 AM | Time Trial Session 1 |
| 0:25 | 8:55 AM | HPDE 3 & 4 Session 1 |
| 0:20 | 9:20 AM | HPDE Intro, 1 & 2 Session 1 |
| 0:15 | 9:40 AM | RACE GROUP B QUALIFYING |
| 0:05 | 9:55 AM | Course Check |
| 0:25 | 10:00 AM | HPDE 3-4 Session 2 |
| 0:15 | 10:25 AM | RACE GROUP C QUALIFYING |
| 0:20 | 10:40 AM | HPDE Intro, 1-2 Session 2 |
| 0:15 | 11:00 AM | RACE GROUP A QUALIFYING |
| 0:25 | 11:15 AM | Time Trial Session 2 |
| 0:20 | 11:40 AM | RACE GROUP D QUALIFYING |
| 0:20 | 12:00 PM | Race Group Drivers’ Mtg. |
| 0:45 | 12:00 PM | Lunch Break & Course Check |
| 0:20 | 12:45 PM | HPDE Intro, 1 & 2 Session 3 |
| 0:35 | 1:05 PM | RACE GROUP B RACE |
| 0:25 | 1:40 PM | HPDE 3 & 4 Session 3 |
| 0:35 | 2:05 PM | RACE GROUP C RACE |
| 0:05 | 2:40 PM | Course Check |
| 0:25 | 2:45 PM | Time Trial Session 3 |
| 0:35 | 3:10 PM | RACE GROUP A RACE |
| 0:20 | 3:45 PM | HPDE Intro, 1 & 2 Session 4 |
| 0:25 | 4:05 PM | HPDE 3 & 4 Session 4 |
| 0:20 | 4:10 PM | WERC/SERC Drivers’ Mtg. |
| 0:25 | 4:30 PM | Time Trial Session 4 |
| 0:40 | 4:55 PM | Afternoon Break |
| 5 hrs/3 hrs | 5:35 PM | WERC/SERC |
Sunday, June 11, 2023
| Duration | Start | Session |
| 0:30 | 8:00 AM | HPDE/TT Mandatory Drivers’ Mtg. |
| 0:15 | 8:00 AM | RACE GROUP B WARMUP |
| 0:15 | 8:15 AM | RACE GROUP C WARMUP |
| 0:15 | 8:30 AM | RACE GROUP A WARMUP |
| 0:25 | 8:45 AM | Time Trial Session 1 |
| 0:25 | 9:10 AM | HPDE 3 & 4 Session 1 |
| 0:20 | 9:35 AM | HPDE Intro, 1 & 2 Session 1 |
| 0:20 | 9:55 AM | RACE GROUP B QUALIFYING RACE |
| 0:05 | 10:15 AM | Course Check |
| 0:25 | 10:20 AM | HPDE 3-4 Session 2 |
| 0:20 | 10:45 AM | RACE GROUP C QUALIFYING RACE |
| 0:20 | 11:05 AM | HPDE Intro, 1-2 Session 2 |
| 0:20 | 11:25 AM | RACE GROUP A QUALIFYING RACE |
| 0:25 | 11:45 AM | Time Trial Session 2 |
| 0:20 | 12:10 PM | Race Group Drivers’ Mtg. |
| 0:40 | 12:10 PM | Lunch Break & Course Check |
| 0:20 | 12:50 PM | HPDE Intro, 1 & 2 Session 3 |
| 0:35 | 1:10 PM | RACE GROUP B RACE |
| 0:25 | 1:45 PM | HPDE 3 & 4 Session 3 |
| 0:35 | 2:10 PM | RACE GROUP C RACE |
| 0:05 | 2:45 PM | Course Check |
| 0:25 | 2:50 PM | Time Trial Session 3 |
| 0:35 | 3:15 PM | RACE GROUP A RACE |
| 0:20 | 3:50 PM | HPDE Intro, 1 & 2 Session 4 |
| 0:25 | 4:10 PM | HPDE 3 & 4 Session 4 |
| 0:25 | 4:35 PM | Time Trial Session 4 |
Series Leaders944 Spec: Chuck Sharp |
Super Touring: Jean-Luc De Fanti |