Hey guys, I've got an acrobatic plane in the works that calls for a .46 2 stroke. I'd like to install a Saito 4 stroke, what would be one to use? Maybe the .56 size Saito, or bigger yet? The plane has a cowl so need to stay with in the .46 2 stroke size.
I seem to like more than enough power, but everything has is limits. Most ARFs have a engine recommendation for either 2s or 4s. This one does not. For more than enough power I will usually step up a knotch from the recommended size, with no qualms about fabrications for fitting.
I guess what I'm looking for is a "Rule of Thumb" for changing a 2s engine for a 4s, I know I need to go bigger, But how much?

Thanks, Mando...........