I don't believe you mentioned what prop size you are running, but that is one thing that determines the current your motor pulls. One difference between fuel engines and electric motors is that there are three variables with electric: motor size, gear box ratio, and propsize & pitch. Running the same # of cells in the battery pack, one can "regulate", to some practical degree, the current by varying one or more of the three variables.
Specifically you may be able to run full throttle by down-sizing your prop on your plane. The thrust would be down, but the SS might still fly.
The answer to your question about "what motor will these battery packs support" is that it may support several motors, depending on the thrust required for the airframe and what gearing and prop is needed to generate that thrust. You could probably run a 280, or 370, or 380 motor with the appropriate gearing and prop selection and get about the same output results. Perhaps a little far fetched, but the basic concept is true.
Sierra Gold
***** By the way, I don't disagree with the pack recommendation Dr. Kiwi made and I use to run KAN 1050s on my stock SS motor. I was trying to illustrate that with electric there is not always just one correct answer because of the amount of variables possible.