The ammo you're thinking of is a 2600, 36-56-2600. It's much better suited for an emaxx, but still has a tendency to get hot. Anything smaller in an ammo and it would not be enough. I've never ran the 36-50-3300, so I can't comment on it in particular, but I wouldn't have thought to try it either. I have been through 2 of the 56-2600 motors though. I liked them well enough. Not quite feigao, but very similar. I'd place the 36-56-2600 right alongside a 9L. About the same power, heat, and durability.

J.