Does anyone know how to do this? I want to take the AFG KA300 and up it's speed to match that of the new PT6A-52 engines that the new KA200's have...Thanks!

There's no "speed setting" for any of the aircraft that determines the cruise speed.If you're wanting to set up different engines, you need to change the engine's max thrust value.

Ok, here's the engine part of the .cfg...thoughts?[GeneralEngineData]engine_type = 5Engine.0 = 9.35, -8.537, 0Engine.1 = 9.35, 8.537, 0fuel_flow_scalar = 0.68min_throttle_limit = -0.25 // -0.85[propeller]thrust_scalar = 1propeller_type = 0propeller_diameter = 8.75propeller_blades = 4propeller_moi = 25.6beta_max = 65beta_min = 18min_gov_rpm = 17958 //22447.5prop_tc = 0.01gear_reduction_ratio = 17.6056338fixed_pitch_beta = 25low_speed_theory_limit = 80prop_sync_available = 1prop_deice_available = 1prop_feathering_available = 1prop_auto_feathering_available = 1min_rpm_for_feather = 700beta_feather = 79.5power_absorbed_cf = 0.9defeathering_accumulators_available = 1prop_reverse_available = 1minimum_on_ground_beta =10 //5 //1minimum_reverse_beta = -14rotation = 1, 1[TurbineEngineData]fuel_flow_gain = 0.022 //0.011inlet_area = 0.646rated_N2_rpm = 29930static_thrust = 157afterburner_available = 0reverser_available = 0[turboprop_engine]power_scalar = 1maximum_torque = 3244

If you want to increase cruise speed, you need to increase the thrust of the engine.To increase engine thrust in a/c.cfg increase the variable "thrust scaler".Note that increase in thrust scaler also increases your idle thrust, thus you need to use brake more during taxi