Are you using Receiver Battery(6.6V LiFe) with your 1 cell ESC?
I am now using LRP SXX V2 with 3.7v 6000mAh 60c. I felt the car lost control suddenly after playing for 3 to 4 minutes. I don't whether the supply voltage from ESC to Receiver cannot be maintained or not.
If the receiver battery is being using, do u use the 6V supply from ESC? or u use them at the same time. I tried to disconnet the black wire from ESC to Receiver. Only white & red wires were connected from ESC to Receiver. It works but I am not sure whether this arrangement is correct or not.