J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment IRC Rating

I have a J30 in the UK and have raced IRC for the last 10 years with her. The 2005 endorsed IRC rating is 0.924 - We are reasonably competitive on this rating. A fractional J29 with inboard rates at 0.942 giving us 1.8 minutes per 100 minutes of racing. A J92 or X332 rates about 0.990 giving us about 6.6 minutes in 100. I hope this helps.