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BrianG
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Join Date: Nov 2005
Location: Des Moines, IA
02.04.2010, 06:45 PM

I didn't read the whole thread, but I have a couple Quark125B's and they are pretty smooth. They do tend to run warm, but that's nothing a little modding, a couple caps, and better heatsinking can't solve. I have always been a fan of Quark because of their smooth starts, but now that Castle has tweaked their software quite a bit, I find the MM/MMM/MMPro is just as smooth as the Quark.

If you haven't already done so, I would disable the LVC completely and try it. That will eliminate any chance of the batteries dipping too low. Also, I would try different batteries as well. I'm not a huge fan of Maxamps due to their real-world performance (I speak from experience) in even a gentle setup; 4s 5Ah 20C pack in a 2WD Slash on a 2200kv motor geared for ~35mph should NOT cause the batteries to get hot. Anyway, if it still stutters, I would start suspecting the ESC.

FYI: despite the 125A rating, the Quark 125 is roughly equivalent to the Mamba Max (regular one) current-wise, so I would probably equate the 80A version closer to that of a Sidewinder, or maybe a tad more. So, if it turns out to be faulty, a MM might be a good choice for replacement as long as you are running 4s (with BEC) or lower.
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