Tamiya tourers have a limit as to what motor they can run anyway due to their construction. Id rather see this class governed by common sense rather than rules/regulations, ie if your car is not "moderately paced" then it either doesn't run or needs detuning in some way. On the straight line speed front, my ff01 has a 13t brushless (£50 combo) and is as quick as a silver can F1 in a straight line.
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