Don't be afraid...
...do more flying...
Per the manual, the Vne for the RV-9 is 210mph. Vno is 180. Va is 118mph
Consider the extra 20hp (assuming that you have an O-360 or IO-360-B variant of 180H.P.) a gift that yields shorter take off rolls, faster rate of climb, higher cruise, more performance margin...
Retired Firmware Guy and Airplane Builder
2020 RV-14 QB -- Under construction - Tailcone & Empennage Complete.
2018 RV-7 QB -- Built, Flying
2007 RV-7 QB -- Built, Drowned, Resurrected and flying
1998 RV-8 QB -- Started, Sold
1986 Mooney 205SE
1980 Mooney 231
Aided and abetted building a number of other RV's.