Group ND Proposal
- Supercharging is not permitted unless fitted as standard to the particular model.
- The supercharger general location and its drive system must remain unchanged.
- The brand of supercharger is free save that the type of supercharger must be maintained (e.g. Roots, Twin Screw, Centrifugal, Sliding vane etc.)
- For any replacement supercharger , the per cycle flow of the supercharger can be no more than 40% greater than the standard vehicle supercharger.
- Boost pressure and all other associated components including pulleys, intercooler/s and boost controller/s are free, however any intercooler pipes must only be used to channel air and no external bodywork alterations are made to accommodate the supercharger, intercooler and its pipes. Any holes drilled in inner panels for intercooler pipes must be no larger than needed for the pipe and fitted with a rubber or similar sleeve.
- Water or alcohol injection is prohibited.
- Water cooling of intercoolers is prohibited.
Justification and Rationale
Similar to the current Group 2B regulations.
