Hi, I have an Stampede XL5 with the older yellow ESC (upgraded connectors to high current ones). The truck only goes about 17 mph with a venom 7.2v 2400mah battery. I am wondering what will give my truck more speed and torque. I am willing to spend around 100$. I would like to know what ESC and motor should i upgrade to. I have stock gears. Thanks!