30k motor with m115 springs for classic army dt4?

[TheRizzCommando]

Anyway I got a classic army dt4 with a krytac 30k motor and upgraded barrels and hopup and I was just test firing it today and the krytac motor started heating up after only one mag on each barrel. I thought that I needed a more powerful motor to work two barrels but after only like 400 shots the motor is already heating up. I am also using a big ass rc battery because i thought that would help the motor but the the motor still seems to be working really hard to fire even thought its shooting around 400fps 20rps. the springs i am using are just m115 and i am getting crazy fps for those springs. Are my springs and gearbox going to be shot if i keep using a 30k motor and should i get a 7.4 battery instead of the big boy?