hawkman-RCU

anybody flying their mxs on 4 cell pack ? using 2200mah 3cell on my mxs gives me about 3 minutes of flight time, not long enough. cant find specs on motor to know if the motor will handle a 4s pack. will put a 60 amp e.s.c in it if motor can handle it. im running 3s 3000 mah now and still short flight time. thanks