2. Safety Requirements
Note that the North America Chapter SRCC does not sanction races. Rather, it is simply a points championship of events sanctioned by other organizers, for example, VARAC, SVRA, HSR, or CFCR. Modifications for safety will be permitted and will be required as specified in the regulations of the sanctioning body organizing each event.

3. Chassis
3.1 Unrestricted except that the use of carbon fibre composite structural materials is prohibited. No engine oil or water tubes are permitted within the cockpit. The engine will be mounted upright and aligned fore and aft in the chassis.

3.2 It is the intent of these rules to minimise the use of ground effects to achieve aerodynamic downforce on the vehicle. Thus the chassis and body surfaces which comprise the underside of the car shall not deviate from a flat plane by more than 2.5 cm or 1 ". This deviation may not be used to create an aerodynamic device. For this purpose the underside is defined as being within the rectangular area along the length between the front edge of the front wheels and the rear edge of the rear wheels and across the outside of the front and rear rims. No aerodynamic devices e.g. skirts, bodysides etc., shall extend below this surface anywhere on the car to the rear of the front wheels. The area of this surface must extend to the full width of the body, it must be of minimum width 142.24cm over a length of 91.44cm (i.e. there must be a rectangular solid surface of at least 142.24cm measured across the vehicle by at least 91.44cm measured along the longitudinal axis of the vehicle).

3.3 There must be no stressed part in the longitudinal section of the chassis structure between the steering wheel and the seat back may exceed in height 30cm (11.8in) above its lowest point. Rollover bars braced to the front are exempt from this rule.

4. Bodywork including aerofoils.
4.1 The body shall provide a cockpit for 2 seats and cover all mechanical components including wheels and suspension members except for the exhaust pipe, induction system and camshaft cover which may protrude through the engine cover.

4.2 Between the front and rear axle lines the body shall:

4.2.1 maintain over a minimum of 70% of the length of the wheelbase and over a depth of 20cm (7.9") a minimum body width exceeding the greatest overall width across the tyres less 15cm (5.9").

4.2.2 exceed in height the top of the tyres over a width of 50cm (19.7') excepting only cockpit and engine openings. There shall be no gap between the main body and the mudguards which must comply with Vehicle Regulations.

4.2.3 Maximum vehicle length forward of the front axle centreline: 84.5cm (33") (including aerofoil/spoilers) Maximum vehicle length rear of the axle centreline: 94cm (37") (including aerofoil/spoilers).

4.2.4 The body above the chassis level in the region of the cockpit shall not be reinforced in any way which would complicate or hinder the rescue of the driver. The cockpit opening seen in plan view shall be symmetrical about the longitudinal axis of the car and shall be large enough for a horizontal rectangle of 80cm (31.5") by 40cm (15.75") to be passed through with its minor axis aligned with the vehicle's longitudinal axis.

4.2.5 Space for 2 seats shall be provided each of at least 40cm (15.75") width and shall be positioned symmetrically about the vehicle's longitudinal axis. There shall be at least 25cm (9.9") wide foot space for both driver and passenger measured at the pedals. The passenger space should provide as much seat space, elbow room, foot and leg room in terms of length, width and height as that of the driver. Battery boxes and fire extinguishers are permitted in the passenger seat area.

4.2.6 Maximum height with driver on board excluding safety rollover bar and mirrors shall not exceed at any time 90cm (35.4") measured from the ground.

4.2.7 Aerofoils and/or spoilers mounted at the front of the vehicle are permitted. Those aerofoils and/or spoilers may only be adjusted in a horizontal plane.

4.2.8 Adjustable aerofoils and/or spoilers mounted at the rear of the vehicle shall be in the form of a flat plane and may only be adjusted within +/- 20' of vertical. There must be no gap between these surfaces, or any other aerofoil, and the main bodywork.

4.2.9 No bodywork/diffuser panel is allowed between the inside faces of the rear wheels below a horizontal plane connecting the centrelines of the rear axles to the rear extremity of the car.

4.2.10 Ground clearance at all times must be at least 4cins as defined in E12.19.10

4.2.11 All ducted air for heat exchangers (water/oil) shall pass through those heat exchangers.

5. Engine
Where Ford Motor Co are no longer able to supply replacement parts, it is acceptable, within these rules, to use parts from other sources so long as they are direct replacements and do not increase the engine performance. A direct replacement, in these rules, means the part, and any sub components within the part, will be dimensionally within the original Ford drawing tolerances and otherwise would conform to the relevant Ford material and test specifications. The only permitted engine is the Ford 2 litre single overhead cam NE series engine.

5.1 Cylinder bores may be increased in size by no more than a + 0.5mm rebore on the standard 90.84mm, giving a maximum bore size (include 0.02mm wear allowance) of 91.36mm.

5.2 The camshaft and rockers shall remain entirely unmodified. They shall be fully manufactured and ground by the Ford Motor Co. Offset keys are permitted. It is prohibited to grind from blanks, regrind or re-profile. Tuftriding or parkerising is permitted. Maximum valve lift at determined points by camshaft rotation will be established. The use of low rate substitute valve spring is permitted. The load characteristics of special checking spring 121bs at 1.417" and 301bs at 1.000". Maximum valve lift against cam angle with zero tappet clearance is 0.400" +/- 0.005".

5.3 A standard crankshaft shall be used. Spot machining to achieve balance is permitted. Tuftriding, parkerising, shot peening, shot blasting and polishing are permitted. Minimum weight is 12.47Kgs (27.51bs).

5.4 The flywheel shall be a standard component. The clutch may be a standard unit or an AP Cover plate assembly CP2511-1 with driven plate CP2374-1. Spot machining to achieve balance is permitted. Flywheel bolts are free and locating dowels are permitted. A Ford 'Kent' 1600 GT starter ring may be fitted. Flywheel and clutch assembly minimum weight 13Kgs.

5.5 Maximum compression ratio will be controlled as follows:

5.5.1 Minimum cylinder head combustion chamber volume 50cc (not including head gasket). Polishing and/or grinding of the cylinder head to achieve only the required combustion chamber volume is permitted.

5.5.2 Standard Ford gasket minimum thickness 0.9mm minimum diameter of cylinder aperture 92mm.

5.5.3 Pistons shall not protrude above the cylinder block surface at TDC.

5.6 It is permissible to reshape inlet and exhaust ports by removal of metal within limits. Addition of material in any form is prohibited. The maximum diameter of inlet port at manifold head face 39.5mm. Maximum dimension of exhaust port at manifold face 35.5mm x 27mm. The distance between the valve centres and the angles of all the valves shall not be altered.

5.7 Piston KS part no 90606600 (Std) or 90606610 (+0.5min). AE part No: 21426, Mahle part No 01421/00 (Std) or 01421/01 (+0.5min) or Ford part No: 6171403(Std) or 6171404 (+0.5). Unmodified in any way except for balancing as follows:- To achieve balance material may be removed from the internal surfaces at any location below the lowest point of the gudgeon pin. All external surfaces, dimensions and profiles must remain standard for the nominal size of piston being used, with the exception of the top surface of the piston crown which may be subjected to simple machining to achieve balance and the objectives of the above clause regarding compression ratio. Standard Ford connecting rod with bolts and without bearings minimum permitted weight = 1255 grams

5.8 All 3 piston rings shall be fitted compression rings and scraper second rings shall be one piece single homogeneous material type with conventional plain gaps. Chromium plating of the top ring is optional; oil control rings shall be either single piece twin land type or apex 3 piece (2 rails and an expander).

5.9 Valves shall remain standard. No re-profiling or polishing is permitted. The original 45º seat angle shall be maintained. Maximum face diameter inlet is 42.2mm Maximum face diameter exhaust 36.2mm Minimum valve stem diameter 8.4mm. Overall length inlet 111.15mm ±0.5mm. Overall length exhaust 110.55mm ±0.5mm.

5.10 Connecting rods shall be standard Ford parts.

5.11 Machining is permitted to remove metal from the balancing bosses to achieve balance only. Tuftriding, parkerising shot peening, shot blasting, polishing etc. are permitted. It is permitted to radius the area around the big end cap retaining bolts. Alternate connecting rod and big end bolt assembly part no. M6200C200 are permitted. Big end bolts part no. 905500 are permitted.