HPI Savage XL Octane with reverse modul!

HPI Savage XL Octane with reverse modul. In the Video the Engien is rich. After leaning, it did a top speed of 56 Kmh with 44/14 pinion. (Stock is 47/14 pinion) He had over 10 tanks of fuel. The car is over 115 decibel loud, thats way to loud :(