The only thing I can see wrong is how hard you drive it and if the gear mesh is too tight. If you are always accelerating 100% and using the brakes constantly I can see where it might cause problems.
Your setup is very similar to Joe Fords setup he has for a Kyosho GT2 for speed runs (100mph+). You can check all the details and videos
here. It sounds like you need to let the car cool down. Joe's car probably weighs a little less than yours. maybe 10lbs.
This is his setup:
6s 5300 30C
2200kv Monster Max combo
2 speed transmission
This is what he said:
Quote:
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With the gearing I am running and current it is drawing the motor does need some time to cool down between runs (but it's ok...so do my nerves!). If I can get a handle on all the power the 2200kv system provides I'll be going up to the 2650kv motor with the same battery and gearing. It's currently geared for about 140mph, the 2650 would take it up to about 170mph according to Mike @ RCM.
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