ORIGINAL: 123Cat
Do you run the airboat with the flat bottom that kind of slides in the turns , Ive had a ST45 in one and its good , The heli mufflers have that big volume and they claim some good power , I dont doubt it , I run a mini pipe so I have not tried big volume , but it looks good
I have had my Enya SS30 on a hydrofoil lately. It's a great running engine and puts out some good power. I do not use air rudders much as I prefer the sharp control a wet rudder provides. They turn like cars this way.