tamiya connectors have more resistance than Deans or Traxxas connectors. the more resistance, the less current can flow. and if too much current flows, the connectors can actually melt! so i would suggest switching all plugs to Deans or Traxxas. if you are comfortable with soldering, use deans. if you have no experience with a soldering iron, use the new traxxas ones, as they dont need soldering.

you will find that your vehicle feels more "punchy" as a result of lower resistance, switching the connectors is going to be very worth while versus using a temporary adaptor.