big prop but want bigger for spartan

[Boss777]

i got 1.9x3.0 48x76mm prop and i would say something around 60mph with castle 1600kv motor and t180 esc runing around 100-110f on motor and esc prop is big and takes of hard but i wanted to try 1800kv motor and maybe bigger prop but which one let me know if you done any mods to yours to make it go 70mph thanks all

[Boss777]

i wanted 3 blade prop any know good 3 blade for spartan help out thanks