CAR SPECIFICATIONS ( ammended 2 /2025)
In order to allow as many genuine 50s cars as possible to join us we have established a base Specification of “how they left the factory”. ALL CARS MUST COMPLY WITH THE PERIOD FIA APPENDIX J REGULATIONS WHICH WERE IN FORCE DURING THE YEAR OF MANUFACTURE. They must also be in compliance with Appendix K regulations as in force in the current year of competition.
In effect this means that the cars must be presented in the form and specification thye were in when raced in Internationaly recognised races ( Le Mans etc. ) in the time period when the cars were still being produced. Cars modified after production of the model ceased will need to be returned to their original specification options.
From this base we have abstracted a number of criteria, which we feel our cars should retain, some are in our opinion “sacrosanct”, and some are desirable where we are aiming to develop the regulations, but are currently not mandatory. They are listed below with side notes, which describe their importance.
Engine / Gearbox
Cars MUST use the original engine block that was attributed to that model of car. The Cylinder heads should be to original specifications, replacement Alluminium heads are not allowed unless used for racing in the period when the cars were still being manufactured.
Gearbox internals are free, but must retain the original number of gears. Overdrives are permitted, but only if originally supplied by the manufacturer for that model. LSD’s are only allowed if they were fitted in period by the factory
Carburettors
The original type and number of carburettors are required,.
Brakes
Original types of brakes are required. Only brake systems available from the factory whilst the model was in production are allowed.
Wheels
An additional 1/2” increase over the original manufacturer’s specified width will be permitted free, but original diameter would be a requirement.
Tyres
The preferred tyre is Dunlop Racing Vintage R 5. The Committee understand that a number of competitors do in fact compete with other Series that allow the Dunlop “L Section” tyre to be used. With this in mind, and to keep racing costs to a minimum, we are persuaded to allow a special dispensation for the Dunlop “L Section” tyre to be with FISCAR. All Dunlop Racing tyres are to be in 204 compound.
For cars using 16” wheels only other tyres may be considered on application.
Exhaust manifolds
The original type of manifolds are required.
Suspensions
These need to be as supplied from the factory in period for your particular car. No modern upgrades of components may be added on either axle
Overall Weights
We have specified each model’s overall end of race weight, and we feel that this is one of our Series requirements. Cars will be weighed at race ends, and they will be required to come up to the “Specified” weight.
Some of the “relaxations” mentioned above, may require Modification Ballast to be carried, and this would increase the overall weight that the car should come to. This additional ballast would be agreed with the entrant and Committee prior to the start of the season, and will be done on a car-by-car basis.
The above Specification criteria will enable us to create a more “in period” race and a more level playing field for all our competitors and their cars. Prior to accepting any car for the Fifties Inter-Marque series (now registered with the MSA), a car Declaration Form will require to be completed and submitted to the FISCAR Eligibility Committee for their consideration and approval. This will be done in conjunction with the Eligibility panel, with further clarification, if required, back to the owner / entrant.
MC October 2025
