Originally Posted by rcnewb2004
A capacitor will give the vehicle more punch and a smoother acceleration for sure. Its not a requirement, your equipment will function 99% well most of the time because the quality of ESCs today are far better. But if your driving style/track requires you to accelerate and brake constantly, it maybe benefical for you to add a cap.
I have a twister 2.1 and run 19T, adding the cap has definately helped me exit corners a bit quicker. Suits my style of driving (I jam the throttle too much). Infact I have 2x 4700uF caps on mine linked in parallel. Does wonders for acceleration.
Get back to earth mate, caps aren't capable of providing high amps, and the energy they stock will only make the motor turn slightly as has been said earlier. As an example, your 4700 µF caps are capable of stocking 0.12 Joules, this is completely useless to provide power for more than a nanosecond to a motor.