These are the motors. When wired to the battery the motor run full tilt no problem. Just stuck on how to control on/off with the arduino and the power source being a 18v 20a battery... https://www.amazon.com/Redcat-Racing-Blackout-550-Motor/dp/B00O9MRKIK/ref=sr_1_4?ie=UTF8&qid=1480651088&sr=8-4&keywords=550+motor