View Full Version : looking for a pair of SICK 550's
08-04-2003, 08:01 PM
i just bought a caribbean cruiser....im kind of dissapointed in its speed, handling is decent and it rides quite nicely. however, i want a pair of high performance 550's, i need to know where to get em. actually, i was wondering to myself if a 775 would work, like if i ran 12 cells to it how fast would it go direct drive?? possibly 2 775's on 12 cells? also, in my caribbean cruiser there are 2 tamiya connectors for the batts, so i can use 2 batts. the thing is, i dont know if each one is driving one motor itself or if they're both driving both motors as a 14.4v setup. i've never understood the whole paralell and series thing with batts, all i know is plug em in and go. but is there anyway i could use 2 batts for one 775 motor and still get 14.4 volts? or would i only be able to wire it through one connector so it would only be 7.2 volts. also, think i'd be able to jerry rig two 775's on a dual 550 mount? thanks a BUNCH for all help recieved.
Honestly man, i'm kinda puzzled by your description.. but since no one has taken a crack at your questions i'll give you my opinion.. but keep in mind i'm only guessing here.
first of all i'd find out what ESC your running in it, and look up its limits. i would bet that its running your two batts in series wich gives you 14.4v's
think of it this way.. if you run two 7.2's in series the voltage doubles to 14.4. if you run them in parallel then your running 7.2v's but they piggy back eachother so you get longer run times.
hope that helps a little.
i would imagine that your boat runs all the voltage thru the esc and then is split back out to each motor.. so not one batt per motor. thats my guess tho.
to run a 775 instead of 2 550's i would think you could hook up the batts as normal, but the leads to the motor you would have to jerry rig..
maybe just hooking both pos and negs to one motor. i dunno tho, i wouldnt try it until you get more feedback from someone else.. this could fry everything..
dunno if that was any help but i wish you luck..
08-05-2003, 07:42 PM
its a mechanical speed control, the mod motors that it lists are 14 turn. i dont know what the max ampage is though. but if i used the same 14.4v output as already goes to my 550's, could i run a single 775 off of that 12 cell setup. and if so, would there be an increase in speed. or a decrease. my boat right now is not direct drive, they say on the box its a 1:1.7 reduction. but it seems a lot more than that. i want a direct drive though with high rpms in the 20k range, that has muscles so it can turn a larger diameter prop than an x440 so as to move more water and go a lot faster. without of course burning up my boat. oh by the way, thanks for the help:D
i dont know man.. if your h*ll bent on trying it, then go for it. i really dont know if it would be an increase or not. if i had to guess i'd say it would have a better top end but not the acceleration that the dual 550's have.
i think i'd just drop a pair of hot 550's in there and save myself the trouble..
08-07-2003, 01:30 PM
If you want to know your what your gear reduction is, just divide the number of teeth on your pinion, and put that over the number of teeth of your spur gear.
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