Frank
Did you say that you were going to put 25 size engines onto your c-160 if so i think it will do just fine i guess alot depends on where you also live along with the alt. is most important, you may not have the power to do some of the things that you want to, it takes me full power to do a big nice loop bt i am sure that the 25 will do just fine and will have good power to fly it nicely, rollie