Anybody here bashing or doing speed runs? Running 4s with 46t spur/20t pinion I'm only geting about 40mph. On 6s I'm hitting 53mph. This is with a 2200kv motor. Does this sound right? According to the speed calculator I should be hitting 57mph on 4s. I'm only close to that on 6s. Do you think 500k fluid in the center diff would make a difference?