How do you shake those jets?

You know the ones- they cruise around and aound at about 500ft waiting for
someone to take off and swope down behind you -- now you got to shake them
before thier missles get you. I go up, i go down, sideways, no luck. The
other way around they seem to be able to turn faster than i can regardless
if im going slow or fast. At least ive learned not to use afterburners to
try to get away. -_
Cant seem to find a setting to make the turns faster. Any ideas except quit
flying?
I know there must be a way to increase manuvering speed because ive seen it
done ---- just dont know how to do it. any advice would be appericated
Tom