I don't think there should be limits on motors, just whatever you can handle on your car. If the motor is too fast then you will be just as bad as if your motor is too slow. As I mentioned before, I see constant podium placings in the magazines of 1st place 7.5 turn, 2nd 5.5 and 3rd 6.5 etc..... as long as the motors are BRCA legal.
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Xray T2'009/B44/B4
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