Questions about SC700

[LJH]

So I have been running my Cesa with a SC700 in it for a few weeks and it is going great. I am either running some old CP2400 (12 cell packs) or 3S Lipos. I am running a X448 and have water cooling on both the brushes and the can (not sure if I needed brush cooling but it looks cool :p ). The motor is really not much warmer then ambient but that might be caused by the fact that I am running in 35-40 degree water. I broke the motor in before running it by running it at 3V for about an hour in water, the water got a little gray but nothing like when you break in a SP400 motor. SO...anyhow I am looking for a bit more performance, woudl a prop change make a significant diffrence? How about adding a few more cells? How many cells can the SC700 take without drasticley shortening its life? Any tips on some better speed would be appreciated.

Cheers,
Jim

[DuckOfDeth]

It will run on 21 cells for about 4-5 seconds before it fries itself. Just a heads up in case you start feeling frisky.

I ran it all summer long on 14 gp3700's.

Duck

[Fluid]

Anything over 12 will result in a shorter life, but if you prop down the impact is reduced. 14 cells with a small enough prop in a free-running boat should be okay. Over 14 cells and the life is definately reduced - but with care you can still get a lot of runs out of it.

In our club LSO boats we are all running either 700SCs or SS-1s and x645s. The boats are very well set up and run free. The motors are under 110F after 6 laps on a 1/6th-mile course on an 80 degree day. Mine is not watercooled - none of my 700 motors are. My last SS-1 lasted over 2 years and only crapped out when I ran it with too much prop for too long on a 106 degree day and got it up to over 185F!!! Warped the comm and it was never the same again....and you cannot watercool the comm. :(


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[boater76]

I have a 700 as well. I was planning to run 14 cells on it. How much shorter could the motor life be?

Ken

[Fluid]

On 14 cells the maximum temperature will determine its life. Keep it under 140 degrees and it will last a long time, just comm wear and a little bushing wear (keep 'em lubed). Keeping it cool means a smaller prop and not running for ten minutes. Watercooling really does little to protect the most critical wear part - the armature. Smart setup and use rather than a bandaid will keep it running longer.

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[LJH]

Sticking with 12 cells and switching to a X645, what kind of improvments would I see? Because of the rocker the CESA runs very loose so I do not think that will be an issue :p ,

Cheers,
Jim

[Fluid]

A lot depends on the cell quality with the 700 motors. Most of our club LSO boats are running 32-36 mph with an x645 or m645...but we are not running "fan packs".


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[Doozie870]

Props, you may have your hands full defending your title, 32-36mph in oval trim!!

[Fluid]

Tony had plenty of mph left in his Drifter in LA, but he was a gentleman and left some room for others to hope... ;)


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[properchopper]

Yup, but wait 'till this years SAWS ! ;)