Mark McCann attempts to drive his rebuilt Bugatti Veyron, facing clutch slipping issues and exploring solutions with gearbox experts.
Key Takeaways
- Custom-made clutches may not perfectly replicate original Bugatti parts, causing performance issues.
- Oil flow and heat dissipation are critical in high-performance clutch design to prevent slipping.
- The Veyron’s transmission software is finely tuned to original clutch characteristics and may struggle with new materials.
- Self-learning software adaptations can potentially resolve clutch engagement issues without hardware changes.
- Patience and careful driving are essential during the clutch adaptation process to avoid further damage.
Summary
- Mark McCann rebuilt the Bugatti Veyron gearbox without Bugatti's official help and faced clutch slipping problems after the first drive.
- The new clutch was custom-made as Bugatti refused to sell original parts, leading to differences in material and design.
- Rob Barnes, an expert who helped design the original Veyron clutch, explains the clutch slipping is due to oil hydroplaning between plates.
- The original clutch design included cutouts to dissipate heat, which the new clutch lacks, causing friction and slipping issues.
- The car's transmission software is calibrated for the original clutch, causing mismatch and confusion with the new clutch material.
- Rob suggests the car might self-learn and adapt the clutch engagement through driving and temperature-based learning processes.
- The team attempts to warm the transmission and let the car perform a 'kiss point learn' to adapt clutch pressure and improve performance.
- Driving carefully to avoid overheating and burning the clutch is critical while the car adapts to the new clutch material.
- The video includes detailed technical explanations of the clutch mechanics, software adaptation limits, and troubleshooting steps.
- Despite challenges, the team remains hopeful the car will self-correct without needing to dismantle the gearbox again.
Chapters
- 00:00Introduction and gearbox rebuild issues
- 02:29Clutch material differences and slipping explained
- 05:08Transmission software and clutch adaptation challenges
- 07:32Preparing for clutch learning and testing
- 09:45Clutch adaptation process and initial results
- 17:03Progress update and ongoing troubleshooting
- 19:43Technical insights and system limitations
- 23:13Summary and future steps











