summer i think the 9x8 would be to much for that airplane with that engine. i run the 60LX on a fast 155+ airframe with the 9x8 and it takes almost a full lap for it to unload some. yes its still strong running but once it unloads it really shines. i would suggest a 9.5x7 APC or Bolly for that airframe and engine. specially at 8lbs.