Mamba max getting HOT fast!

[BrianG]

Basically, you need lots of power to launch something that big and heavy. Power is generated by voltage and current. Usually, to get high power, it's better all the way around to use higher voltage. Unfortunately, the MM is limited to around 4s. At that "low" voltage, you will need quite a bit of current to launch it with also the top speed you want.

Reducing the gearing would be your best choice. No matter if you get a fast motor and gear down, or get a slower motor and gear up, the same amount of work is being done and the ESC/batteries will be working just as hard. The only advantage in a slower spinning motor at this point would be a slightly better efficiency IMO.