will the 80mm medusa fit in an erevo?

[suicideneil]

70mm, 2000kv. You could get away with the 2200kv motor also, as that would be equal to the 1515 1y almost, and those do fine on the MM (with a fan and extra capacitor usually). On a stock Erevo, that should be more than enough power- endless wheelies and back flips galore..