I have 130 hours on N2578B, and have yet to exceed 152 knots true airspeed at 75% power. I’ve figured it out on the 430’s as well as the airspeed indicator, and have flown altitudes up to 10,000 feet.
Others’ experience? Advice as to what can be done? I keep it clean. Could humidity be impacting the speed or the calibration? Forward CG?
Interested in any input.