If you said you did I'm gonna believe you . 47 was the fastest I had seen a 4.5 on 4s in a fully stock MT,posted or otherwise,and I just pulled my 4.5 from my emaxx and the fastest I radared it in there was 43,but not on totally fresh batteries.I don't think the motor will handle enough amps to push that on even 12volts,but I've been wrong before.But it does amaze me sometimes.Your tires would have to be 7.5 inches if you figure 12 volts and 4500kv.Well from previous tests I can tell you that these perform almost identical to MA cells.But actually will handle more constant load.