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Hmm.. Here's a couple of suggestions.
Were the cars the same speed when they had the stage 1 motors in them?
Try and swap motors. Put your brother's motor in your car, and your motor in his car. See what happens.
Check to see if you're both set on "high". Look on top of the controller, there is some buttons, look for the one which says hi and low. Make sure that both controllers are on high(or low, whichever your preference).
Other that that, check your connections. I've never heard of one being faster than the other.
Let us know.
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"There is no greater bore than perfection"
Xmods:
Drifter-05 mustang- AWD, PVC drift wheels, bearings.
Racer -Dodge Viper- Custom body, Flipped wheels, suspension upgrade, steering upgrade, tire upgrade, stage two.
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