HO Slot Car Racing - Slot Car Track Power Wiring Dedicated to HO Slot Car racing, collecting, restoration, track design, electronics and software. Track Power & Wiring Modern AFX and Tyco slot car motors require a power supply producing 18 to 20 volts of direct current (VDC), while older Model Motoring cars require 20 to 24 VDC. Track Wiring - HC Slots Track Wiring. Below is a nice, standard wiring diagram for a 4-lane layout. Track Review of the AGM Top Racer Set. HC Slots-August 19, 2019. 0. Tyco's "Super Duper Double Looper" Set Review. Viper V1 HO Slot Car RTR Chassis Assembly & Discussion. July 9, 2015.