3W-55Xi on 11" header with ES55G Composite tuned pipe..

Sea level
50*F low Humidity
Motor has fresh piston and ring, Has maybe 30 oz. premium 32:1 Stihl Ultra through it so far..
Xoar 23 X 10 PJX EagleNose prop

7500 rpm on the ground set slightly off max.

Instant throttle response with good midrange..

Going to try Menz 24X8 next..

Rick