Hi Guys
If you use the 3639-1100kv(800 Watts), you can straight change over to a 3648-1450kv(1600 Watts).
So starting with the 1100kv
3s=12,210 rpm
4S=16,280 rpm
The 1450kv
3S=16,095 rpm
4S= 21,460rpm
Only double the power and 5,000 rpm more!!!!
And the 1450kv can handle 6S, if you are brave !!!!!
Canabus