|Champion Spark Plug RC9YC|
| Thread||Reach||Hex||Tip||Heat Range|
|14 x 1.25mm||0.750"||3/4" *||Projected||Hot|
|* This hex allows more clearance in the SCCA aluminum head |
than the standard Champion N6YC plugs, which have a larger
This gap style positions the spark an additional 1/8 inch into the chamber and, providing there is sufficient clearance to valves and piston, provides the ultimate in performance. Initiating the flame front closer to the piston top at a given spark has the same effect as advancing the timing. Therefore, maximum timing may be reduced, which helps to reduce detonation and octane requirement and still provides good part throttle response. For normally aspirated engines only; not recommended for turbocharged, supercharged, nitrous oxide or nitro burners.