Lipo shouldnt heat up too much as its rated for 100 amps constant
You will have less problems on 4 or 5 cells. If it got hot on the road you should also look at gearing but definately get a higher cell count battery.
does the car roll easily with the motor out - spur gear will turn pretty easily even if there is minor binding in the drive train
My lipo is rated for 100amper constant.As ı can see the car moves fine without motor but I have not much exprience. This is my second car. Other one is a 4x2 Slash.
After your suggestions I'll try the car on 4s and 5s before ı get my bigger pinion (on international transit) Thanks a lot..
I'll inform if the problem solved or not..