11v 40C isn't that crazy, it's uncommon but not unheard of. I think maciek has some pretty huge batteries that are pretty big, not sure where he's disappeared off to, I kind of expected him to chime in a lot earlier.
Remember that the C discharge is only part of the equation, that battery at 25C and 1200 mah will be discharging a constant rate of 30amps at 11 volts. You'll probably be into the low 30s with that battery and a good fet unit.
Going through some other threads on asm, I see someone was asking about their own 30rps build a few months ago, they wanted to drive 13:1s on a 7.4, and a couple reputable builders say it won't happen with 7.4s unless you use 10:1 siegeteks. Or 18:1 dsg, so you'll have to resort to 11.1 lipos. Which should get you most of the way, if not all the way with what you've got already.
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I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.
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