you said you only touched full throttle for like a second. did you run out of room? I'm thinking since your pushing the limits of what the r/c is physically capable of your spool up and top speed are probably similar and you just need a place where you can really open her up and let her fly.
BTW: it's awesome you joked with me and didn't get your tighty whities in a bunch over my first comment. A+ motor mount and ride. I like you already!