RE: NEW to FE? BUILDING a boat? What's a LiPo? Look Here FIRST!!
You know i don't worry about amps as my boats don't go above 4S lipos and run a T-120 esc in a 29" BBY mono with UL-1 motor a 440 Octura prop for sport. There's a formular and i don't want to give #'s out. May be Paul785 knows the #'s. Motor kv x volts ????? Ok, you mention 8S which to me signals HV and a 180 esc would fit the bill. I don't know if you have a boat or contemplating on buying one but a 29-31" mono is hard to beat. Motor wise, a 1800 x 4S + 440 Prop with a 3/16" flex and no trim tabs but twin turn fins. Center of gravity 28-30% of which depends on water conditions. Hope Paul chimes in with his vast knowledge. I really like to work with 22"- 26" monos to get the most out of them and really the 22" monos. Have a good day!