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Approved Chassis:
- Must use current, commercially available 41/2” flexi-car production chassis. No prototypes allowed. The approved chassis are listed below:
- Champion 4½” Turbo Flex
- Parma 4½” Flexi II or III
- JK 4½” Cheetah 7, Scorpion I, II & III, one piece
- Trinity/Slot Works 4½” Spyder 2000
Allowed Chassis Modifications:
- May solder or glue motor to chassis
- May add lead or brass weight
- May solder or glue rear oilites
- May reinforce rear uprights with piano wire or Slick 7 “U” brace
- May file holes in motor bracket, but must retain all of the bracket
- May file highest rear axle bushing hole to level rear axle.
- May use a piano wire motor brace no longer than 1” and may connect to chassis motor bracket
- Fixed or floating pin tubes and guide tongue support are allowed.
- Must use oilites/bronze bushings.
- Commercially available aluminum pans designed for the chassis being used are allowed.
- May reverse pan on the cheetah 7 chassis, However, pan cannot be cut or trimmed and front wheels must be free to rotate.
Disallowed Chassis Modifications:
- No ball bearings allowed at rear axle
- No axle tube bracing front or rear
- No cutting or modifying of chassis in any way. Chassis may be ever so slightly filed to increase or decrease movement of the chassis pan. However, beware that lightening a chassis is prohibited. This rule will be strictly interpreted .
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