I have about 60oz (4lbs) in the nose of my plane to get it to balance out. I do not know the weight of the ASP 160 but if it is less than or equal to the OS 160 twin then I would put a bigger motor in just to have the extra weight and power. Now I do not have the air retracts of the dumy radial, just fyi if you are trying to compare apples to apples. Good luck on the build!