Question about which Motor / ESC to use for a Boat

[Make-a-Wake]

Hi killerinc, the boat you have is not really made for high speed, but can be made into a faster, more efficient one. The drive line is the main limiting factor with the U-joint setup as it cant handle huge power. The 1640kv motor penz offered you is really a pretty good choice......needs to be ran on 4s lipo or12-14 cells nimh for some decent rpms, but not too high as to severely abuse the driveline. It should get you into the 25-30mph range which is really all the hull can handle anyways. This setup should also run very cool as it will not be overtaxed with a conservative prop such as an x438/x440.

[penz]

Ill pm you.

[dana]

I understand Dana, there are alot of variable, i was just looking for a starting point and to understand what the jargon meant. Ty for explaining that.

Penz...ok , how do we do this...can we talk in emails about the motor

i know, theres alot to learn, but the motor he is selling is a great starting point.... should get you close to 40mph on two 7 cell nimh packs or two 2s lipos. on two 7 cell nimh you have 16.8 volts X 1640 = 27,552 rpm. a great starting point, right where you want to start

[killerinc]

Hey Wake can u send a link for the prop you think i should get?
Thank you so much Dana, Penz, and Wake and Everyone else for the great info!!

[killerinc]

i know, theres alot to learn, but the motor he is selling is a great starting point.... should get you close to 40mph on two 7 cell nimh packs or two 2s lipos. on two 7 cell nimh you have 16.8 volts X 1640 = 27,552 rpm. a great starting point, right where you want to start

Got a quick similar question, how would you figure out the RPM's of a Brushed motor? its a Monster 550 14.4v with a 8.4 Nimh battery?