21.5 lipo geared 100/33 with box stock tires rolling out to to 62.6 mm is about a half a second to a full second a lap FASTER than the 13.5 sedans. My CRC is an absolute blast to drive. I could see limiting the C rating for sure.
Sedans were running right around 10 seconds during testing. The CRC cracked a couple 9.2s and a 9.1, but seriously settled in around 9.4 seconds.