Boost and turbo are only available for brushless.. So even if you hooked up your motor and used the 'brushless' motor option it would give and error for wrong motor type. In the 'brushed' mode there is no turbo/timing.
Dynamic timing (ie turbo and boost) can only be used on sensored brushless motors.
Hope this helps
By the way, that 15turn, if its a decent motor, should go pretty hard anyways
Not sure about the 5.3 FDR though... I would go higher (Not sure on xactly how high though)