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ALL NEW RULE CHANGES ARE IN BOLD PRINT Cars, engines and fuel will be checked on a random basis at the end of a meeting for eligibility. When referring to the engine or construction rules and regulations, the principal will always be:- unless permission is specifically granted to make modifications or any variations, nothing may be done to alter or change in any way the standard parts. I.E. Unless these rules state you can do it, you CANNOT do it. Violations will result in an immediate suspension of all racing facilities and any refusal will also result in an immediate suspension. Drivers are reminded that scrutineer checks can be carried out at any time, and most certainly at official championships. If parts are suspected of being illegal make sure you leave them with the promotion if you do not agree, if you refuse it will automatically make the parts illegal. Any running gear, including brakes may be used from the same manufacturers range to a maximum of 1400cc. No parts from a 1600cc may be used.
1. DEFINITION The Stock Car is a standard production vehicle up to 1300cc and with ironwork in and around the car for contact racing. The object is to complete the specified number of laps in the shortest time. You may push a car from behind or spin a car to the inside of the circuit, you must not follow a car to the inside of the circuit and you must not follow a car into the safety fence or lean or spin a car into the safety fence. Unnecessary baulking of a faster car is not permitted. 2. TYPE OF CAR Any four seater front engined saloon or hatchback constructed of steel not exceeding 1300cc when manufactured may be used as listed in cars eligible section as detailed below. Should anybody wish to race a car other than one of those listed must request permission from the Promotion. CHASSIS\IRONWORK\BODYWORK IMPORTANT NOTICE: All ironwork must be 2.5mm to 3.5mm. Where an imperial measurement is given a metric equivalent may be used. N.B. C.H.S. = Circular Hollow Section \ S.H.S. = Square Hollow Section \ R.H.S. = Rectangular Hollow Section. 3. BODYWORK a) Bodyshells and panels must remain as manufactured and must retain the original silhouette, and panels must not be shortened, modified or substituted unless specific permission is granted within these rules. b) Front wings below the ironwork may be removed to ironwork. c) The front inner wing panels must remain to within 15cms of the front panel. d) Front and rear chassis members should not be shortened or cut back, and where possible the front panel should remain. e) The removal or any structural stiffeners is NOT permitted with exceptions of doors, bonnets, boot/tail gate and doors must be welded closed. f) The boot floor may be removed (not chassis members) from the rear axle centre line to the rear panel. 4. IRONWORK Bumpers a) Front and rear bumpers must have 2 horizontal bars with four or five equally spaced uprights, 38 x 38mm S.H.S. or 50 x 25mm R.H.S. b) Bumpers must be flat and horizontal irons must be a minimum of 36mm top to bottom. c) Front bumper hoops must be fitted both ends of the front bumper and three vertical upright should be a minimum of 8cms in height above the top horizontal irons, with a support from the side iron going no further back than the centre of the front wheel, and one support going across the front bumper, no further than the second upright (not including the corner upright). Fence corner upright may be tube or box section - 3mm thick. There must be no small pieces of metal attached to the upright. d) There should be a minimum f 3 pieces of ironwork joining each outer corner upright of the front corner upright of the front and rear bumpers, coming from the front to the rear, excluding the bumper ‘rope’ extension (4.c). Siderails e) All side rails must be constructed of 50 x 25mm R.H.S. and must be a minimum of 30cms apart top to bottom. f) The area between the top and bottom and front and rear wheels may be constructed of 3mm plate and the removal of the original panels in this area is permitted, but if the original panels are left in place, a 3mm thick plate, a minimum of 2/3’s of the total width of the door must be welded on the outside of the chicken bars on both side of the car, the side rails must be a minimum of 30cms apart. Protection bumpering must be constructed in accordance with illustration to ensure even contact between cars. Under Irons g) Must be under body and pass over or under rear axle or subframe or over or under the front cross member of subframe. h) Subframe where fitted may be mounted to the under irons. i) Under irons must follow chassis rails or floor, but must not be above chassis rails or floor at any point. Exceptions to this rule would be when a piece of floor running next to a chassis rail is lower than the chassis rail, it may be pushed up level with the top of the chassis member or cut out. j) Under irons must be 38 x 38mm S.H.S. or 50 x 25mm R.H.S. and may be cross braced. They may connect to the internal ironwork. Front Wheel Protection k) A single piece of either 38 x 38mm S.H.S. or 50 x 25mm R.H.S. may be fitted centrally over both front wheels on the exterior ironwork only, to protect the struts. It must be a maximum of 61cms in length with rounded edges. Rear Wheel Protection l) A) Ironwork must cover the top of the wheel rim. The lower ironwork may be shaped outwards to a maximum of 50mm from the original side ironwork. The 38 x 38mm S.H.S. that protects the rear wheel may continue to the rear bumper.
B) The area between the top and bottom side rails may be covered in part or whole with 3mm plate. C) A heavy duty spring must be fitted if a piece of 38 x 38mm box section is not used. The spring must be securely bolted in front of the wheel, and the slider mounted behind the wheel, with a minimum of one 38 x 12 mm bolt and washers. The spring must not be heated to bend (cold bending only if necessary - welding is not permitted). Extra Protection Ironwork m) This is allowed on the inside of the car only and cannot be “straight through”, there must be a break of 15cms front to rear, either by stepping and joining or diverting, or angling the ironwork. n) A single piece of 38 x 38 mm S.H.S. may be used coming off the passengers door top chicken bar to the dash across bar, this bar must not come further back than the centre of the passenger door window aperture (measure at the lower edge of the window aperture). o) A single section of 38 x 38mm S.H.S. may be fitted format he near side front lower bumper iron, to the rear roll cage hoop cross bar, any connection ironwork must not be above the lower door chicken bar, inside the confines of the roll cage. p) Corner gussets to a maximum of 15cms triangles can be used, but over lapping of gussets is not permitted. q) It is recommended that the drivers floor pan, below pedals, be reinforced with a piece of steel plate 3mm thick. Must remain standard as manufactured with the following exceptions:- Steering Column a) Height can be adjusted to suit the driver, however it is recommended that the upper retaining brackets of the column be strengthened on some cars for safety. b) A quick release type steering mechanism may be fitted. Suspension Top Mounts a) The nearside front top suspension mounting may be repositioned to achieve negative camber and castor and may be strengthened but this must not be adjustable. The offside suspension top mounting may be strengthened only. Shock Absorbers Up rated dampers may be used but not adjustable. All units must originate as non- adjustable. It is not permitted to use original adjustable shock absorbers with the adjustment either disabled or removed.
a) NO Gas Shock Absorbers can be used and all suspension legs must remain as original except where gas shocks were fitted, these must be replaced with an oil filled leg. You may change the oil in oil filled front suspension legs. b) On front (strut type) shock absorbers, if the tube is pressed in to the hub it may be welded and strengthened at this point. c) Front units only with sealed tops may be modified to a screw top closure in order to service the unit.
The foot valve may be modified but must be the original, i.e. Vauxhall to Vauxhall, Toyota to Toyota. Locating holes or eyes on shock absorbers must not be elongated or re-positioned. Springs Springs are free, but an 18cm block must freely enter under the driver side door sill between the front and rear wheels. These will be checked without the driver in the car, if at the end of any race the car fails this check the drivers’ points and prize money will be deducted. Only one spring per corner. Front Suspension On the near side front only, the lower track control arm can be lengthened by 25mm and the roll bar may be lengthened accordingly. There is no tolerance permitted on this measurement. Rear Suspension The Toyota Starlet rear suspension top axle link bars, may be substituted for bars and bushes of a different size, but you must not alter the length. 6. ROLL CAGE Must be constructed of 38 x 38 S.H.S. or C.H.S. 3mm to 3.5mm. The roof may be removed to aid welding and fitting of the cage, but must not be lowered or shortened when refitted. a) A full roll cage 38 x 38mm S.H.S. or 38mm C.H.S. b) The cage must have 1 front hoop, 1 rear hoop. c) 2 roof-connecting bars with the complete top area of the roll cage filled in with 3mm plate welded on all four sides. d) The roll cage hoop feet must be welded to four 3mm thick plates 10cms squared, welded or bolted to the floor, if not an integral part of the ironwork. e) Each door must have a minimum of 2 chicken bars minimum 30cms apart top to bottom with 3mm plated welded to the outside. f) There must be 1 cross bar in front and 2 behind the driver, one at shoulder height to support the seat. g) Any part of the roll cage, which comes into direct contact with the driver, must be suitably padded. h) Each front door must have 3mm plate welded on the outside of the chicken bars or a 3mm plate may be substituted for the original panels between the top and bottom ironwork, between the front and rear wheels. If the original panels are left in place, a 3mm thick plate a minimum of 2/3’s of the total width of the door must be welded on the outside of the chicken bars on both sides of the car, the side rails must be a minimum of 30cms apart. 7. ENGINES The engine must be standard to the car. An oversize bore of 1.5mm maximum is allowed. All engine components must remain standard ( with the exception of the cam shaft which is free )and must not be inter-changed from different models with different engine sizes. a) Air filters may be removed or replaced. b) No ram pipes, bell moths or stubs are allowed. c) Choke butterflies and cold start equipment may be removed BUT ECONOMY DEVICES MUST BE FITTED AS STANDARD. Carburettor d) The carburettor you must use is shown with venturi size in the cars that are eligible list. 1. The slow run, air correction and main jet, where fitted may be drilled to adjust mixture only. 2. The carb’ venturi size must not be altered. 3. The carb’ body must not be altered or modified. 4. The exhaust manifolds with a hot spot under carburettor may be blanked off. e) The standard sump must remain, but many may be baffled and the oil pick up may be modified within the confines of the sump. f) In the case of the Toyota Starlet 3K & 4K engines the cylinder head with ports larger than 29mm must not be used. g) Cylinder block and head may be skimmed on the head gasket surface only. The head gasket must not be modified in any way. 1. If the oil feed to the cylinder head becomes misaligned when head is surfaced it may be realigned. 2. Head bolts may be shortened or washers may be used. 3. 3 angle valve seats on the cylinder head are not permitted. 4. No welding of cylinder head, either repairs or modifications. 5. Valve springs - the original manufacturers part or any standard pattern replacement may be used. No competition types. Solid lifters may be fitted, hydraulic lifters may be welded or modified to be solid and shimmed. h) Engine mountings may be solid, but mountings must not be moved from the cross member or the engine bay. The engine position must not be altered. i) The engine may be tilted (slightly) to stop fuel starvation. Distribution j) No electronic ignition unless as manufactured. Distributors must be the original manufacturers part, and the mechanical advance may be altered, but the vacuum advance unit must be fitted and working, The base plate cannot be fixed. Note: with the Nova/Corsa - you can use either Bosch distributor with contact, or the ACDelco electronic ignition system. k) Head and piston combinations must be as manufactured. The maximum piston protrusion will be 010. Thou. and pistons must have their original identification markings on the crown. l) Engine and gearbox may be restrained. m) Flywheels may be lightened. 8. WHEEL BASE The overall wheelbase of the car must not be staggered more than 25.4 in total. CAR ENGINE SIZE VENTURI SIZES Citroen AX11 1124cc 25 or 23/24 Weber Colt Lancer 1288cc 21/27 Colt 1200cc 21/27 Datsun Sunny 1300 1296cc 20/26 Fiat Uno 1299cc 19/23 WEBER 30/32 Ford Ka 23/24 Ford Fiesta MkII to MkV 1300cc OHV 23/24 Ford Fiesta MkII to MkV 1300cc CVH 24/25 Ford Escort MkI 1300cc & GT 23/24 The GT engine and gearbox may be fitted into the MkII body shell Ford Escort MkII Basic 1300 23/24 Ford Escort MkIII 1300 OHV 23/24 Ford Escort MkIII 1300 CVH 24/25 Mazda 323 1300cc 21/27 Peugeot 205 1294 (OHV engine ONLY) 36 DCN VH17 Weber or 26 Weber 321 BSH or 23/24 Weber Toyota Corolla 1300DX 23/26 Toyota Corolla SR Coupe Twin Carb 18/24 Toyota Starlet 1.3 1290cc 23/26 Toyota Starlet FWD Asian 21.25 Vauxhall Nova 21/23 or 20/24 Pierberg Vauxhall Corsa or Tigra 21/23 or 20/24 Pierberg Volkswagen Golf, Polo and Passat 21/23 or 20/24 Pierberg Should anybody wish to race a car other than one of those listed must request permission from the Promotion. The gearbox and final drive must remain standard, but gears and ratios from the same manufacturer may be interchanged and the gearbox and final drive may be interchanged within the manufacturers range. The differential assembly may be locked by way of welding. All of the above exceptions must be achieved without machining or modifications of the standard part(s). Flywheels may be lightened. Driveshafts: Must be the original fitted to make and model, or any shaft within the manufacturers range and must remain standard. The fitting of spacers is not permitted. Propshafts: May be modified or interchanged from manufacturers range. Gearbox Mounting: The gearbox mounting may be solid but must not be re-positioned. 11. WEIGHT LIMIT ALL Cars must be a minimum weight of 900kgs to a maximum of 1000kgs. Ballast is not permitted. 12. BRAKES Must remain standard as originally fitted to the model, and be working on all four wheels. Handbrakes must remain and must be in working order. No modifications permitted. 13. TYRES AND WHEELS Any standard steel road wheels, to a maximum width of 14cms can be used. Please note that the the use of alloy or any competition wheel is not permitted. The Yokohama 175/70/13 AA01 A-Drive is the ONLY tyre permitted. 14. EXHAUST SYSTEMS The standard exhaust manifold, which the model was produced with, must be used. Exhaust manifolds with a hot spot under carburettor may be blanked off. A single ford silencer Par No E1 ADDN 5320A or AX891 is permitted. A minimum 25cms section of tail pipe must be fitted to the silencer facing rearwards or down. Any exhaust system passing through the drivers cockpit must be fully covered by a metal shield. Exhaust down pipes are free. 15. COOLING SYSTEMS Radiators are free but must occupy their original position. Only one radiator permitted. a) All glass must be removed. b) A metal upright, to a maximum 2.54cms box or tube, minimum 1.9cms box or tube section, must be welded or bolted to the centre of the front windscreen aperture. c) A wire mesh panel covering the drivers side of the screen is recommended. 17. MIRRORS a) Rear view interior mirror may be fitted. b) Door/exterior mirrors must not protrude beyond extreme body/chassis width of the vehicle. c) The size of the mirror approximately 15 x 10cms maximum. and if glass should be covered with a clear plastic, to prevent the glass from fragmenting. 18. CATCH TANKS An oil catch tank with a minimum capacity of 1 litre, must be fitted in the engine bay, and must have a minimum of 2 breather pipes connecting to it, one from the rocker box and one from the crank case. If the catch tank becomes ineffective during racing or practice the car will be withdrawn from the event. 19. BATTERIES AND ELECTRICAL SYSTEM a) Batteries must be securely fixed and covered with a rot proof material if fixed inside the vehicle or cab. b) Contact between the safety harness and battery must not be possible. c) Batteries must be a minimum of 15cms from the fuel tank. d) A battery master switch must also be fitted in the area of the rear left hand window and must be clearly marked - ON/OFF or have an Electrical Danger Decal. e) If an electrical fuel pump is used a switch must be fitted within easy reach of the driver. f) A self starter motor must be fitted and in working order at all times. a) All fuel tanks must have a positive means of fixing (metal straps or bolted). b) Filler caps must not be prone to spillage - not push on caps. Caps must be metal and secure or screw on type. c) Fuel tank including filler caps must be covered by a firewall. d) Fuel outlet must be on top of tank. e) A breather pipe which must be incorporate a one way valve or have a vent pipe terminating below tank, so if inverted would prevent spillage must be fitted. f) All fuel pipes must be inside vehicle. g) If there is a floor under the tank there must be a 4 c 50mm holes in the floor, in case of spillage. h) A fuel shut off tap must be fitted within easy reach of the driver. i) Fuel lines must be metal or metal covered. j) A single electric pump may be used in place of the original. k) Fuel tanks must be metal only or FIA approved. Only tanks with a maximum capacity of 18.18 litres (4 gallons) or less is permitted, this must be fitted inside the boot of rear area. IT MUST NOT BE FITTED BELOW THE CHASSIS RAILS of the car. A firewall between the driver, fuel tank including filler cap and pump must be fitted. An electric fuel pump may be used. 20A. FUEL For the full fuel specification please see the separate sheet 21. NUMBERS Side of Cars The drivers racing number must appear on both sides of the car. Preferably these should be in large American style racing numbers on a contrasting background, background must extend a minimum of 50mm beyond the outline of the number(s). The minimum height and stroke of the numbers must be 41cms high and 8cms stroke. Fin Plate Fin plate(s) must be used if aerofoil is not applicable, and the numbers should be a minimum of 23cms high by 38mm stroke, and a maximum of 30cms x 5 cms - black on white background fitted above the roof line and visible from both sides. The fin plate must be a maximum size of 63cms high x 61 cms wide (there should be no other advertising board/signs above the roof line). 22. DRIVERS NAME a) A sun visor to an appropriate depth of 15cms with your name or nickname clearly sign written must be fitted. c) The drivers name must be clearly sign written on the car. 23. DRIVERS SEAT Must occupy the original position. The standard seat may be replaced for competition type. A head rest must be fitted, to roll cage or seat. 24. SAFETY EQUIPMENT · · Plastic or Polycarbonate helmets (i.e. British, European or Snell) of any type are not permitted. · Helmets must be of a minimum standard as directed by British Oval Racing Safety Executive (B.O.R.S.E). These are BS6658/85 Type A, BS6658 Type A/FR, FIA8860-2004, Snell SA2000, Snell SA2005, SFI Foundation 31.1, or SFI Foundation 31.2. Shatterproof goggles/visors must be worn although tinted visors are not advisable. · Neck braces are recommended. · Fireproof balaclavas are MANDATORY from 2nd January 2007 and must be marked appropriately. · Fire retardant gloves are MANDATORY and must be marked appropriately. · A minimum of 3” (75mm) wide safety belts (1.75” (40mm) sub-strap) are mandatory. This must be a full five point buckle release harness (including NASCAR type) with sub-strap and must be fitted and bolted to the floor and/or the roll cage. Shoulder belts with a sternum protection latch are highly recommended. The sub-strap must be used at all times and all belts must connect to the quick release buckle. In the case of NASCAR lever latch buckles it is advisable to fit a secondary means of detent to prevent overall sleeves accidentally unhooking buckles during racing. A small section of Tubegrip elasticated bandage slid over the hooked buckle serves this purpose. Special attention must be paid to the condition of seat belts and fixings once fitted. An extra bar is to be fitted to roll cage behind drivers seat approx 4” below shoulder height of driver. Your seat belts may be fixed to this bar. The bar is to be of roll cage material specification. · Drivers must wear bright coloured racing overall type clothing of flame retardant Proban or a high specification material and this must be maintained in a clean and tidy condition in view of the public. N.B. If wet weather clothing is used this must be worn IN ADDITION TO and NOT INSTEAD OF the regulation flame retardant overall type of clothing described above. · A quick release cloth window net must be fitted to the driver’s door window aperture. The netting should have holes not larger than 7.5cm or 3” wide. It should come down level with the steering wheel, and should be flexible and easily removable separate to the movement of the door. · A 1Kg Dry Powder Gauge Fire Extinguisher is highly recommended and if fitted, this should be in a tube with a spring top and should be within easy reach of the driver. Old type BCF (green) type extinguishers are not allowed. 28. ROOF GRADING All cars must paint 90% of their roof in their roof grade colours. Finally make sure that in the construction of your car you have not included any flammable material, all original interior and exterior trim, mouldings and wiring must be removed. The external painting of the car must at all times be of professional appearance preferably in bright colours although any colour scheme is permitted. All sign writing must be of a professional nature. 30. TRANSPONDERS Transponders are mandatory and should be working at all times. They should be fitted 1.8 metres back from the front most position of the car. A hole of at least 6” (150mm) square is required in the floor, with the transponder fitted vertically, just below the hole. In the event of a dispute with the transponder result, the Steward of the meeting will make the final decision. Any driver found to have fitted the transponder further forward that the required 1.8 metres will be excluded up from the meeting.
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