The Junior and Monoposto formulae

To clear the air, note the following :

Junior Formula for International or National Racing (requiring a National and unrestricted driving licence) and for the professional or semi-prolessional or drivers who race as a commercial venture.

1. Engines:  From homologated F.I.A. touring cars (1,000 production models built in one year). Capacity limit 1,100 c.c. but no overhead camshaft engines to be used. Bore size may be enlarged or reduced but no change in stroke is permitted. Induction must be of same principle as production engine (viz., carburetters or fuel-injection). Cylinder block and head must be from F.I.A. approved touring car. Starters must be fitted.

2. Gearbox: From F.I.A. approved touring car, but ratios may be changed, and make can differ from engine.

3. Brakes: Must be in principle (viz., drums or discs) as these of approved car from which engine is taken.

4. Dimensions:  Wheelbase: 78-3/4 inches (200 cm.) minimum.  Track: 43-1/4 inches (110 cm.) minimum. Body width: 37-1/2 inches (95 cm.) maximum.

5. Weights: For 1,100-c.c. engines a minimum of 880 lb; for 1,000-c.c. engines a minimum of 793 lb. (All-up weights, less fuel.)

6.  Forbidden are overhead camshafts; self-locking diffs;  to alter the number of crankshaft bearings; or change the position of the camshaft.

7. Commercial fuel must be used and complete car must have an R.A.C. certificate showing origin of the fundamental parts.


Monoposto Register Formula for Club Racing (requiring ordinary restricted National licence) and for the amateur Club driver who races principally for fun and wants to extend scope beyond 750 c.c. and 1,172-c.c. Formulae.

1. Engines:  From any production saloon car of which 500 examples have been made. Capacity limits are 1,000 c.c. for overhead valves and two-strokes, and 1,500 c.c.. for side-valves. Superchargers and overhead camshafts are barred.

2.  Gearbox: Complete freedom is allowed.

3.  Brakes: Complete freedom is allowed, but two independent systems for front and rear with separate handbrake is recommended.

4. Dimensions: No restrictions, but cars must have all four wheels exposed, be single-seaters, not have wings or enveloping bodies.

5. Weights: No restrictions, but construction must not be of is flimsy nature and must pass R.A.C. scrutineers as regards safety and strength.

6.  Chassis:  Any form of chassis, suspension or engine mountings may be used but must be of non-professional design and construction. “Limited production” chassis from specialist constructors are not allowed, though standard production chassis may be used of a type of which 500 have been built, but this does not mean Cooper or Lotus, etc. Such racing manufacturers’ chassis may be used if built prior to 1953.

7.  No lights, dynamo, starter or battery are required.

8.  Commercial fuel must be used with no additives.

Cars shall, in .principle, be of “one-off” specification and ol non-professional construction and design.

While the future of the Junior Formula rests with the big National Clubs and various commercial ventures, the Monoposto Register is essentially an organisation for Club racers and there will be an open meeting on January 14th at 7.30 p.m. at the Masons’ Arms public house in Maddox Street. London, W.1. where progress to date will be reviewed and members’ projects discussed. All members and friends will attend, and any non-members and friends who are interested will be welcome, but please be sure that you are interested in racing single-seaters in Club events such as Silverstone.