[E-Revonut]

Great advice so far but I think just regearing your current setup would help you alot. As Arct1k said try gearing for high 30's. A different motor would be ideal but much more expensive than a gear. The 1515 is better suited to MT and truggy, buggies don't have as much weight and a lot less rotating mass, therefor don't need the bigger motors. The Medusa would be a great alternative to the Neu at half the cost and close to the same quality.