If you want more speed and less maintenance, then you need to hop-up your SC18 with a Brushless Motor and ESC. A Brushless Motor can take your stock SC18 top speed from about 17-18 mph all the way to 30-40 mph+. Here are some quality Micro Brushless Motor/ESC Combos that will dramatically increase the speed of your SC18 and provide compatibility with LiPo batteries.