SPEC STOCK CLASS RULES

These are 2022 HOPRA rules. They apply to our former Viper V-SPEC "Hardbody" class of car. Now referred to as V-SPEC "Lite" class. Differences between HOPRA rules are indicated in red.

Legal chassis are: BSRT G3/G3R/G3RS/G3RSB, Slottech T1/T2/T3, Wizzard Storm/Fusion, Viper V1 (V-SPEC)

    1. Chassis must be stock and cannot be modified in any way except to cut off molded-in body posts and drill holes for axle retainers.
    2. All magnets must be “HOPRA Approved” stock ceramic or “compression-molded ceramic grade
      polymer” and cannot be cut.
    3. The gauss reading of the traction or motor magnet shall not exceed the following criteria. This
      is taken after 5 min cool-down period and at the lowest point on each magnet as it runs parallel
      to the rail. Any reading above these figures will be cause for disqualification or rejection at
      tech.

      1. TRACTION: 1680 gauss maximum
      2. MOTOR: 1250 gauss maximum
*Magnets are listed by magnet manufacturer and may be used in all chassis adhering to class rules*
Manufacturer Part Number Description
BSRT #277
#290
#284		 G-Force C4 H-D Motor
G-Force C4 Motor
G-Force C4 Traction
Slottech #81C
#86C		 G6 Motor
G6 Traction
Wizzard WS60
WS61
FS40
FS41		 Stock Storm Motor
Stock Storm Traction
Fusion Level 4 Polymer Motor
Fusion Level 4 Polymer Traction
Viper Scale Racing 12000
12001		 Pro 4 Motor
Pro 4 Traction
    1. The armature must be stock. The minimum ohmage allowable shall be 5.8.
    2. The electrical system must be stock or stock replacement for the car. Plated parts are not allowed unless they are stock for the car. The use of “Big Foot” brushes or twisted end bells is not allowed.
    3. The rear axle and guide pin must be stock. 7/23 only gear ratio only is allowed. The front wheels, tires, and axle may be any commercially-available parts. Rear tires must be commercially-available solid silicone or rubber replacement tires.
    4. Rear wheels may be readily available, double flanged replacement wheels.
    5. Only the following Any mass-produced injection-molded hard plastic bodies are allowed:
      1. For BSRT G3/G3R, Wizzard Fusion and Viper V1 chassis: AFX Ford GT40 with the AFX Super G+ type mounting clip. Clip must be attached to the chassis with or without centerpiece of
        the mounting clip. Stock mounting position only.
      2. Bracket/clip may be glued to chassis.
      3. For Slottech T3 chassis: Tyco Corvette body, which snaps onto chassis’ existing Tyco body
        mounts.
      4. For Wizzard Storm chassis: Wizzard Storm body.
      5. All bodies can use glue dots to more firmly secure the body to chassis mounts.
    1. Track voltage will be set at 15.1 volts.