ORIGINAL: Jacked69
I would highly suggest the 55ax and a jett muffler, you will NOT be unhappy
On a GP Revolver or H9 Sundowner yes, on an Escapade no.
While I haven't owned or flown an Escapade, I have seen a couple up close and personal and in the air. They are a relatively small plane designed for sport flying. A strong .40 is probably good, a strong .46 will likely be very lively. Don't get me wrong, I like power and I like going fast. Don't be surprised if your Escapade has some sort of airframe failure with that high performance engine and muffler combo though. I'm not saying it will but it could.
Also, what kind of battery were you trying to stuff in it that wouldn't fit? 6V golf cart battery?