emmaxxnitro what are the front and rear diff gear ratios? What batteries & specs? I was also told by Nic Case when using the calculator use 3.00 volts instead of 3.7 volts per cell. I guess thera is a reason for this maybe under a load the voltage drops.
I imagine the voltage drops more under these kind of loads compared to a normal setup geared for more normal speeds, even with top-notch lipos for power.