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Originally Posted by jhautz
Nick, The trueRc cells are only 10c cells. at 4000mah thats only a 40A cont. 60A burst discharge. Thats not enough. Thats probably why you are having problems. The 8000mah TrueRc packs are fine. 80A continuous and 120A burst is fine.
Starscream, If he goes with the 5s1p pack, he will need much higher quality cells to supply the amps needed. A 4000mah pack would need to be at least 20c cont. 30c burst. to be effective. While they are lighter, they will cost just as much as the 8000mah 10c cells and only give half the run time. Its all a trade off. You are right though... For a pure racer, that may be the better solution, unless he has 20 minute mains to get through.:D
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Racing, being what it is, is not cheap so price is not a factor for me. Since we're specifically talking about racing, weight plays a major factor in the performance of the vehicle so your best over all performance would be achieved by running the lightest and most efficient system. Yes, at 1P you must use 20C Lipo cells. I never stated what C cells to use as I would asume 20C would be used in a 1P application.
I can race 20+ mins on 6S 20C 3200mAh so a 20 min main would not be a concern. I may run into problems though, if the mains were 25+ minutes.
My point being that
4S2P 8000 mAh maxamp pack = 1.6 lbs
my 6S1P 20C 3200 mAh pack = 1.2lbs
a comparable 5S1P 20C 4000 mAh pack ~ 1lb
The key is to determine how long you need to run so that you can adjust your mAh choice accordingly. Why race with more weight if you don't need the mAh...