Karsten Defonce is a racing driver who competes in SCCA Majors. Defonce has recorded 1 win and 2 podiums from 6 starts.[1]
A Racer Rating of 1,985 ranks Defonce 17034th of 40,700 indexed drivers, on an Elo scale where the strongest reach the high 8,000s. It is built from every indexed race in the driver's file.
| 2025-04-06 | Virginia International Raceway SRF3 | P11 | +42 |
| 2025-04-05 | Virginia International Raceway SRF3 | P10 | +62 |
| Rating won | Race | Series | Finish |
|---|---|---|---|
| +133 | Watkins Glen Short Course 2023 | SCCA Regionals | P1 |
| +110 | Watkins Glen Long Course 2023 | SCCA Regionals | P2 |
| +62 | Virginia International Raceway 2025 | SCCA Majors | P10 |
| +42 | Virginia International Raceway 2025 | SCCA Majors | P11 |
| +32 | Michelin Raceway Road Atlanta 2023 | SCCA Majors | P8 |
| Season | Series | Team | Races | Wins | Podiums | DNFs | Poles | Points | Pos | Gain/Loss | Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | ▸SCCA Majors | 2 | 0 | 0 | 0 | 0 | 0 | P72 | +104 | 1,985 | |
| 2023 | ▸SCCA Majors | 2 | 0 | 0 | 0 | 0 | 0 | P33 | +531 | 1,881 | |
| ▸SCCA Regionals | 2 | 1 | 2 | 0 | 0 | 0 | P23 | +243 |
| Rival | Rating | Raced | Ahead | Behind | Record |
|---|---|---|---|---|---|
| 🏳️ Dillon Defonce | 1,975 | 6 | 3 | 3 | 50% |
| 🇺🇸 Michael O'DellHigher-rated | 2,940 | 2 | 2 | 0 | 100% |
| 🇬🇧 John RobinsonHigher-rated | 2,888 | 1 | 1 | 0 | 100% |
| 🇦🇺 Mac HarrisonHigher-rated | 2,551 | 2 | 1 | 1 | 50% |
| # | Driver | Series | Rating |
|---|---|---|---|
| 17,024 | 🏳️ Kale Kunicki | SKUSA SuperNationals | 1,986 |
| 17,025 | 🇬🇧 Karim Sekkat | Nürburgring Langstrecken-Serie | 1,986 |
| 17,026 | 🏳️ Norbert Panels | Nürburgring Langstrecken-Serie | 1,986 |
| 17,027 | 🏳️ Rafael Manzini | Turismo Nacional | 1,986 |
| 17,028 | 🇦🇺 Robert Thomson | 24H Series | 1,986 |
| 17,029 | 🏳️ Samuel Thor | Turismo Nacional | 1,986 |
| 17,030 | 🇨🇦 Antonio Costantino | TC America powered by Skip Barber | 1,985 |
| 17,031 | 🏳️ Bernd Kuepper | Nürburgring Langstrecken-Serie | 1,985 |
| 17,032 | 🏳️ Griffin Yellin | USF Juniors | 1,985 |
| 17,033 | 🏳️ Hugo Beccera | Zenith Racing Series | 1,985 |
| 17,034 | 🏳️ Karsten Defonce | SCCA Majors | 1,985 |
| 17,035 | 🏳️ Mike Kelley | SCCA Regionals | 1,985 |
| 17,036 | 🏳️ Natalie Fenaroli | NASA | 1,985 |
| 17,037 | 🏳️ Peter Tonelli II | SCCA Majors | 1,985 |
| 17,038 | 🏳️ Phil Gilsdorf | International GT | 1,985 |
| 17,039 | 🏳️ Selin M. Rollan | SCCA Regionals | 1,985 |
| 17,040 | 🏳️ Todd Pajones | International GT | 1,985 |
| 17,041 | 🇩🇪 Anton Bauer | Nürburgring Langstrecken-Serie | 1,984 |
| 17,042 | 🏳️ Bob Beede | SCCA Regionals | 1,984 |
| 17,043 | 🇮🇹 Cristian Bortolato | Lamborghini Super Trofeo Europe | 1,984 |
| 17,044 | 🇫🇮 Erkka Suominen | Nürburgring Langstrecken-Serie | 1,984 |
Karsten Defonce is a club-level driver competing in national amateur and semi-professional multiclass racing. He races Formula Ford and Spec Racer Ford machinery in SCCA Regionals and SCCA Majors, where up to 25 classes share a single race. His indexed record spans two seasons from 2023 to 2025, with four starts in SCCA Majors and two in SCCA Regionals.[1]
Defonce took one win and two podiums across his six starts, both results coming in SCCA Regionals during 2023, where he finished 23rd in the championship standings. His SCCA Majors starts have produced no podiums to date. He has beaten semi-professional drivers with substantially greater experience; Michael O'Dell, who has raced ten starts in each series, finished behind him twice, and John Robinson, a semi-professional with nine starts in SCCA Regionals and ten in SCCA Majors along with six FIA GT Championship starts, went behind him once. Among regular opponents, Defonce runs closely matched with fellow club-level driver Dillon Defonce, who shares his schedule across both series.[2]