MMP Start Power

[What's_nitro?]

Forgive me if I've missed it in your post somewhere, but which battery are you using? At 4500mAh even a 15C continuous battery should not have any trouble handling the burst current in a 1/10 TC. How many cycles are on the pack? Have you cycled it on the charger lately to see what usable capacity is left in it? If it's an older pack it might be at the end of it's usable life.

Adding caps might help you get a couple more good laps but if the battery is bad that's only a short-term fix.