RE: OS AX 46 needs more power
if the same guy says you are to fast and he is flying faster than you then you need to have him show you in the rules where you can not run that engine. Have him show you what prop he is runnign and ask him if his engine is stock (get some RPM numbers from him).
I would tell the guy to get bent if i was you and not in the rules lol.
can you post a picture of your plane and engine for me. i might see something where i can help you pick up some speed. find out if can run a Jett muffler also. can you get a set of rules for us or is this just club racing?