I remember reading an article in Racer magazine several years ago (more than 10) where they compared all the connectors available at the time for resistance. If i remember rightly corallys were top with 0.009ohms and deans were a close second with 0.012ohms (or something like that). Since the connector designs havent changed since then i would assume the figures are still the same.
Personally i have always used corallys, and soldered the wires straight on the motor. Dont use tamiya connectors, they are rubbish - i've had several experiences of them getting melted together! (due to their high resistance)
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