pokerville

Hi, probley a silly question i have 2 cars a TC3 and a stock old Tamiya king blackfoot 4X4 i changed the motor on the TC3 as soon as i got it and im wondering if i could put the stock 19T motor on the Tamiya to give it some speed (i hardley use the thing because its sooo slow) or would i need a new speed controler or somthing? thanks guys