C1 ENDURANCE CHAMPIONSHIP
Car: 2012 CITROEN C1
Championship: Silverlake Citroen C1 Endurance
Build Date: April 2024
Here we go again 2025!
Plan was for us old guys to get back into racing in 2024 just to see if we could still cut the mustard with the current drivers. For 2025 the C1 championship was not on the schedule but looks like we enjoyed it too much as along with the other 2025 race projects we will now going for it again starting with Silverstone in March.
The Silverlake Citroën C1 Endurance Championship is a UK-based motorsport series that features endurance racing exclusively for Citroën C1 vehicles. This championship offers an accessible and cost-effective entry point into endurance racing, attracting both amateur and seasoned drivers. Participants compete in races that can last from several hours to 24-hour events, emphasizing vehicle reliability, team strategy, and driver endurance. The series is known for its competitive yet friendly atmosphere, fostering a community of motorsport enthusiasts who share a passion for racing.
BUILD SHEET
Converting a Citroën C1 road car into a race-ready vehicle for the Silverlake C1 Endurance Series involves several key modifications to meet the series' technical and safety standards. Here's a simple guide to assist you.
1. Vehicle Eligibility: New for 2025 both mk1 and mk11 3 door manual Citroen C1 models are eligible.
Engine: The vehicle should have the standard 998cc 3-cylinder engine, unmodified.
2. Suspension and Steering Components: Use OEM or KYB front struts and rear dampers.
Springs: Install the Apex 70-2400 spring set.
Control Parts: Fit C1 Racing Club-supplied lower front wishbones, driveshafts, and track rod extenders.
Bushes: Powerflex front wishbone rear bushes are permitted.
3. Transmission: Gearbox: Retain the standard Citroën C1 gearbox without any modifications.
4. Braking System: Discs and Pipes: Use standard or standard pattern brake discs and pipes.
Pads: Mintex brake pads supplied by the C1 Racing Club are allowed.
5. Tyres: Specification: Equip the car with Nankang AS-1 155/55 R14 tyres.
6. Safety Requirements:
Roll Cage: Install a mandatory Safety Devices C1 Club standard bolt-in roll cage.
Additional Equipment: Ensure compliance with all relevant Motorsport UK Appendix K Safety Criteria Regulations, including the installation of a racing seat, harness, fire extinguisher system, and electrical cut-off switches.
7. Weight Compliance: Minimum Weight: The car must weigh at least 940kg, including a full, unmodified fuel tank, a washer bottle filled with water-based fluid, and the lightest driver in full racing attire.
8. Documentation and Membership: Regulations: Familiarise yourself with the 2025 Sporting & Technical Regulations available on the BRSCC website.
Membership: All drivers must be members of the C1 Racing Club. Additionally, one team member must have the car listed in their "garage" on the club's platform to enter a race.
For more information visit: https://c1racing.club
2025 Schedule
