SUPER STOCK CAR CLASS RULES Legal Chassis: BSRT G3/G3R/G3RS/G3RSB Mattel/Tyco 440 X2 Micro Speedworks T+ Slottech T1/T2/T3 and T1X Wizzard-Patriot P2/P3/Scorpion Wizzard Storm/Storm/CH22/Fusion Viper V1 RPMs Ghost Cat 1. The chassis must be stock, readily available, “HOPRA Approved” and cannot be machined, sanded or cut except to provide the following: a. Add, remove or re-add body mounts b. Reinforce and/or replace pickup tabs c. Add adjustable Brush tension d. Add axle retainer 2. The guide pin can be a stock replacement part. It may be glued in place but shall remain in any one of the stock positions. 3. All magnets used shall be stock or stock replacement ceramic “HOPRA Approved” and cannot be cut. 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. TRACTION MAGNETS: 1500 gauss maximum MOTOR MAGNETS: 1200 gauss maximum 4. Mattel/Tyco 440 X2 traction magnets must be of matching polarity. 5. All magnets shall remain in their stock location. No material or method may be used to restrict the movement of the magnets. 6. Any flux collectors used shall be stock and shall remain in their stock location and cannot be modified. 7. The armature must be stock or a hot stock. The minimum ohmage allowed shall be 5.80 ohms. 8. Axle bushings are not allowed unless they are stock. 9. There are no restrictions on the armature bushings, gears, axles, wheels and tires. Ball bearings are not allowed. 10. Electrical systems shall be stock or stock replacement. Adjustable brush tension is allowed. 11. Physically attaching brushes to springs (using glue or other substance) or spring arm is allowed. 12. Plated parts are allowed. 13. Shunts are not allowed. 14. The use of glue shall not be allowed on the magnets or to retain the magnets to the chassis. OFFICIAL HOPRA NATIONAL RULES 2024 REV 1/15/2024 (Copyright 1975-2024)
SPEC RACER CAR CLASS RULES Legal Chassis: BSRT G3/G3R/G3RS/G3RSB Slottech T1/T2/T3 Wizzard Storm/Fusion Viper V1 RPMs Ghost Cat 1. The chassis must be stock, readily available, “HOPRA Approved” and cannot be machined, sanded or cut except to provide the following: a. Add, remove, or re-add body mounts. b. Reinforce and/or replace pickup tabs. c. Add axle retainer. 2. All magnets shall remain in their stock location. No material or method may be used to restrict the movement of the magnets. a. Only “HOPRA Approved” Compression Molded Ceramic Grade polymer traction and motor magnets may be used, see SPEC STOCK CAR CLASS RULES for specific manufacturer part numbers. Magnets are listed by magnet manufacturer and may be used in all chassis adhering to class rules* Manufacture Part Description BSRT #277 G-Force C4 H-D Motor BSRT #290 G-Force C4 Motor BSRT #284 G-Force C4 Traction Slottech #81C G6 Motor Slottech #86C G6 Traction Wizzard WS60 Stock Storm Motor Wizzard WS61 Stock Storm Traction Wizzard FS40 Fusion Level 4 Polymer Motor Wizzard FS41 Fusion Level 4 Polymer Traction Viper Scale Racing 12000 Pro 4 Motor Viper Scale Racing 12001 Pro 4 Traction Viper Scale Racing 22737 Pro 4 Maxi Traction RPMs RPMsHF-LDM4 Hyper-Force Level 4 Motor RPMs RPMSHF-L4-T Hyper-Force L4 Traction b. 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. TRACTION MAGNETS: 1680 gauss maximum MOTOR MAGNETS: 1250 gauss maximum 3. The guide pin can be a stock replacement. It may be glued in place but shall remain in any one of the stock positions. 4. The armature must be stock or a hot stock. The minimum ohmage allowed shall be 5.80 ohms. 5. There are no restrictions on the armature bushings or axles. Ball bearings are not allowed. 6. Gears ratio must be a 7-tooth pinion with a 23-tooth crown gear. No metal gears allowed. 7. The front wheels, tires and axles may be any readily available parts. 8. Rear tires shall be readily available non-coated solid silicone, rubber, or urethane replacement tires. Rear wheels shall be readily available double or single flanged replacement wheels. 9. Electrical systems shall be stock or stock replacement. Adjustable brush tension is allowed. Physically attaching brushes to springs (using glue or other substance) or spring arm is allowed. Plated parts are allowed. Shunts are not allowed. 10. The use of glue shall not be allowed on the chassis, magnets, or bulkheads. Body mounts, guide pin and armature bushings may be glued into place. OFFICIAL HOPRA NATIONAL RULES 2024 REV 1/15/2024 (Copyright 1975-2024)
CMPM CAR CLASS RULES Legal Chassis: BSRT T2/G3/G3R/G3RS/G3RSB Mattel/Tyco 440x2 Slottech Panther/Panther 02/Thundercat T3/T1X Tomy AFX Super G+ Wizzard Storm/Fusion Viper V1 RPMs Ghost Cat 1. The chassis must be stock, readily available, “HOPRA Approved” and cannot be machined, sanded or cut except to provide for the following: a. Add, remove or re-add body mounts. b. Mount any guide pin holder - guide pin shall remain in any one of the stock positions. c. Add armature bushings or ball bearings. d. Drill or cut holes for adjustable brush tension. e. The bottom surface of the chassis and bulkheads may be sanded flat. However, the bottom bulkhead tabs shall remain naturally connected to the end bells. f. The pickup retaining tabs on the chassis may be reinforced and/or replaced in their stock position. g. Add rear axle retainer. h. Add bulkhead/magnet clip retaining screws. 2. All magnets shall remain in their stock location. a. Only “HOPRA Approved” compression molded polymer magnets may be used, see below for specific manufacturer part numbers. Magnets may be sanded flat on the bottom surface only, so they are flush with the bottom surface of the chassis and bulkheads. b. 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. TRACTION MAGNETS: 2300 gauss maximum MOTOR MAGNETS: 2000 gauss maximum “HOPRA Approved” Compression Molded Polymer Magnets for Polymer Modified Car *Magnets are listed by magnet manufacturer and may be used in all chassis adhering to class rules* Manufacture Part Description BSRT #272 G-Force C4 Traction BSRT #263 G-Force P10 Motor BSRT #271 G-Force P10 Traction BSRT #278 G-Force P10 Traction G-Force BSRT #277 C4 H-D Motor BSRT #290 G-Force C4 Motor BSRT #284 G-Force C4 Traction BSRT #276 G-Force P10 H-D Motor BSRT #292 G-Force P10 Motor BSRT #286 G-Force P10 Traction Slottech #64 T3 Motor Slottech #81 G13 Motor Slottech #81C G6 Motor Slottech #86 G13 Traction Slottech #86C G6 Traction Slottech #62-1 PolyMax Motor Slottech #62-2 PolyMax Motor LW Slottech #67 PolyMax Traction Slottech #68 MegaFlux Traction Slottech #61 PolyMax Motor Slottech #66 PolyMax Traction Wizzard WS60 Stock Storm Motor Wizzard WS61 Stock Storm Traction Wizzard MHP60 High Level Storm Motor Wizzard MHP61 High Level Storm Traction Wizzard MHP67 Level 10 Storm Traction Wizzard FS70 Fusion L10 Polymer Motor Wizzard FS71 Fusion L10 Polymer Traction Viper Scale Racing 12000 Pro 4 Motor Viper Scale Racing 12002 Pro 4 High Torque Motor Viper Scale Racing 12001 Pro 4 Traction Viper Scale Racing 12005 Pro 10 Motor Viper Scale Racing 12006 Pro 10 Traction Viper Scale Racing 12008 Pro 10 High Downforce Motor Viper Scale Racing 12007 Pro 10 High Torque Motor Viper Scale Racing 22738 Pro 10 Maxi Traction RPMs RPMsHF-LDM10 Hyper-Force L10 Motor RPMs RPMsHF-HDM10 Hyper-Force L10 HD Motor RPMs RPMsHF-L10-T Hyper-Force L10 Traction 3. All magnets shall remain in their stock location. 4. The use of glue shall not be allowed on the magnets or to retain the magnets to the chassis. Other nonmagnetic materials may be employed to restrict the movement of the magnets. Any chassis clip used to hold the car together must not touch the magnets or affect the magnetic field. 5. Any type of armature shall be legal. 6. Electrical systems shall be stock or stock replacement. Adjustable brush tension is allowed. 7. Physically attaching brushes to springs (using glue or other substance) or spring arm is allowed. Plated parts are allowed. Shunts are allowed. 8. There are no restrictions on the armature bushings/ball bearings (may be glued in), guide pin, wheels, tires, gears and axles. OFFICIAL HOPRA NATIONAL RULES 2024 REV 1/15/2024 (Copyright 1975-2024)