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Originally Posted by RUSTED

i m8 get a couple of zippy or rhino lipos

but should i get a medusa 50 mm 1600 kv or medusa 2200 , because i already have a 18 teeth pinion and i want to use it ,

now , should i keep the setup ( shown in the pics above) and use 2 4s in parallel or should i return it like stock and use 1 2150-2200 mah 4s 20c pack ??

I understand you want to use your 18T pinion, but I wouldn't let a $10 pinion determine which $105 motor I buy. I really like my 3300 on 3S (12T - 14T pinions) and to be close to that in speed and power on 4S would be the 2200. The 1600 seems ideal for at least a 5S or even a 6S system.