In my b5m I run a reedy 17.5 at 42 degrees timing 72/32. Thing is fast! 12 minutes on med size tight track with a 70 foot straight coming off at 125 after 8 minute. Ran for 13 mins yesterday came off at 135. Have a new souprd up fantom haven't installed yet because the reedy is so fast for a 90$ motor
Not running the 12.5 rotor, or are you not running the 1s?