More dead zone and a well placed mapping of the full throttle key, should help,,,, if your turning, you will be slow till you stop turning,,, also,, if the f is on your screens right hand side of the circle,, it's at full throttle ,, if not,, push the full throttle button
I've got mine mapped to my WEP in Flight button
Twisting the stick while stoped will make your tank walk slowly, and just keep doing so,, so ,make sure your in full throttle mode by checking for the F