The problem with my buggy is the fuel consumption. After only several laps, the tank is empty. We confront with this problem every day with our real cars and the solution would be changing the propulsion system. My plan was to convert my buggy into an electrical car.
I used 2 DC motors (12 V each), one for the front axle and one for the rear one. In this way, the transmission system and the brake system is simplified, losing weight and increasing the performance.
I use a 4600 mA battery pack which resists half an hour at full speed. The car responds faster, has a better acceleration, but in terms of top speed is with 5 km/h slower.