ok, I can now offer some substance to my comments!
that motor running almost 1:1 will get hot, the 1100kv running on 6 cells needs to be geared down, lets assume our hulls are same, they are pretty damn close!, when I ran the align motor which was 1260kv my best ratio, a combination of speed/runtime/heat/prop was 2.5:1, 30 teeth on the shaft, 12teeth on the motor,
52.5mm "x" prop gave max 21.6mph, max spike 68.9amps (check what your esc is capable of), motor was water cooled with a coil, you cant do that with an outrunner like the t600, I think if we get you over 20mph you will be well chuffed! thats fast for these big heavy old boats! motor was getting very warm, but ok, we found that when you stop running an outrunner, and the cooling slots no longer do anything on the can, the latent heat builds up quickly, if the mount is cooled it will dramatically help as heat is the ememy!, a simple thing to help, run the boat slow before you stop to get rid of this heat build up as the water cooling will still be working.
compare this to the align 600 I used, 800kv, same ratio, same prop, speed is now a miserable 12.08mph
, so now we can change the ratio, as the lower kv motor has more torque (grunt) and lower revs, best ratio was 1.25:1, same prop gave up 21.52mph, 71 amps, but very cool, and longer run time. I tried 1:1, very fast, 25mph, but very hot, 1.14:1 was good, 24mph, but still very hot and short run times, and some very high amp readings
, so gave up some speed for better run times
I bough a real nice 3 blade cleaver prop, cost a fortune!!
and didnt really do anything any better, it was probably too big as the boat suffered from some scary torque roll
hope that helps, boat is very difficult to get at so will send measurements when I get it out later, hope that helps, Paul