Mamba XL ver2?

[Raydee]

Ok so you are running a 1520 motor on 22.2 volts (6s)? If that is the case you are running a good amount more RPM than the 2028-8s setup. maybe it is possible that with such a long run time that you are letting the batts get to low on voltage causing the amperage to climb which in turn is doing harm to the ESC? What do you have your voltage cutoff on the ESC at?
1520=1600kv X 22.2v= 35,520 RPM
2028=780kv X 29.6v= 23,088 RPM

If possible can you post your Data log??