2021-Grands-ScheduleThe 2021 Sprint GrandNationals
The ‘Duffy’ is the most prestigious trophy in grassroots kart racing, and once a year the International Kart Federation holds its annual IKF Sprint GrandNationals. The names who call themselves Duffy winners are a who’s who of motorsports and the distinction of being an IKF national champion solidifies any racer’s legacy in the sport.
DATE: October 15-17, 2021
VENUE: Prairie City Kart Track
Pit Passes will be sold on site.
Event Format
- Thursday – Move-In, Unofficial Practice
- Friday – Official Practice.
- Saturday – Morning Warm-Up, Qualifying and 2 Heats.
[Progressive] You will start each heat based on previous finish, post penalties and tech. - Sunday – Morning Warm-Up, 1 Heat and Finals
You will start the final based on finish in Heat 3, post penalties and tech.
Pre-Event Practice
KPX will be hosting their Season Finale at Prairie City the weekend before.
There will be an unofficial Thursday Practice.
Race Classes
IAME Engines will use current SKUSA Rules.
Mini Swift (9-13*)
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LO206 Cadet (7-13*)
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KA100 Junior (11-15*)
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LO206 Junior (11-15*)
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KA100 Senior (14+)
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LO206 Senior (14+)
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LO206 Master (30+)
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LO206 Grand Master (50+)
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80cc Shifter (14+)
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*All drivers 12yo and under must wear a Neck brace & SFI-approved chest protector.
Race Fuel
- LO206: TBA
- All other 2-stroke classes: Sunoco 110 and Elf HTX 909 .
- Sunoco will be available at the track. Use of unauthorized/specified fuel or oil will result in exclusion from event with no appeal. Fuel tests may be conducted at any time during event. Failure to provide a requested sample will result in immediate exclusion from event with no recourse.
Tire Information
- ALL event tires are Evinco, including practice.
- All classes must use same tires for the duration of event (all competition sessions).
- Rain tires must be MG only.