Grand Nationals are based on Nascar from the 60's through 80's. That Richard Petty style racing is always good fun. Get those big block Chevys, Fords, and Mopars ready cause its time to go racing.
Chassis Specifications
Aurora or Model Motoring copper T-Jet chassis only
Motor plate rail can be cut to lower body
No venting or lightening allowed
No metal bearings allowed
No weight maybe added
Guide Pin maybe be guide
Armature
Any Aurora
Minimum ohm of 5.0
Balancing is allowed
Truing is allowed
No rewinds or de-winds
Electrical System
Pick up shoes - open (maybe restricted)
Skis are not allowed
Pick up springs - open
Brushes - open (maybe scored)
Magnets
Ceramic magnets only/Any Aurora/MM/JL/AW/Dash
Magnets maybe sanded
Magnets maybe shimmed with non ferrous material
No polymer
Gears
Brass - open
Crown gear - stock replacement/plastic/15 tooth,
Boss can be shaved spacers permitted inside and outside of the chassis
Gears maybe polished
Axles
Any axle allowed
Wheels - any that support wide slip on tires
Brass or Plastic wheels are allowed
Shimming is allowed
Tires
Front tire - width 3/16 inch minimum
Rear tires - open and slip on variety
Bodies
USAC/ARCA/NASCAR Late model type that ran from 1960-1980, replicas suggested.
Hard shell, resin, wide bodies permitted
Cars shall have front windshield
Rear windshield is optional
Body must have 3 numbers
Two Screws are Required
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