Three cars shall constitute a Group/Class. When a Group/Class is still not subscribed even after merging upwards the competitor (s) will be allowed to merge into the next Group above. When the competitor (s) merges into the Group above the vehicle (s) will then be classified under the cubic capacity (Cc) regulations for that Group. Competitors will only be allowed to merge up to Group 3. Any Group 1 vehicle merging upwards must still comply with all Group 1 trim and the same applies to a Group 2 vehicle, which may merge to Group 3.

When a Group/Class is still not subscribed even after merging to the Group above the competitor (s) will have to compete against all other competitors and will be penalized one (1) point for every second slower than the person who has the fastest time overall in the stage. Should this competitor (s) have the fastest time overall then they will receive no penalty points.

For a Group to be subscribed, the competitors are only required to start any special stage. To be classified as finishers the competitors must complete two-thirds of the total stages of the rally.

Unless otherwise stated in the ASR's, only pump fuel as sold to the public from service stations will be allowed. No additives will be allowed in this fuel.

f. SAFETY

See Appendix A.

g. EXHAUST NOISE

The check which is done by the TTRC for exhaust noise is as follows: 1/2 meter from the end of the tail pipe at an angle of 45 degrees @ 4500 rpm under no load to a maximum of 108 dB’s on ‘A’ scale (slow).

h. FOUR - WHEEL DRIVE VEHICLES

a. Blueprinting of engine is allowed as is balancing (i.e. weight matching, not lightening) of reciprocating and rotating components.

b. Machining of the following items to within manufacturer’s specifications for engine rebuilding/maintenance - cylinder head, cylinder block, crankshaft, valves, valve seats. Up to a 0.040" oversize re-bore will be allowed. After-market pistons must comply with manufacturers’ engine specifications - i.e. weight, ring size and number of rings. Compression ratio must remain within plus or minus 10% of standard.

c. The material in the elastic part of the engine mountings is unrestricted.

d. Cooling fans may be added but not removed.

e. Radiators, providing they remain in the same general location.

f. The engine cooling system thermostat is unrestricted as well as the temperature at which the fan operates. Thermostats may be removed completely.

g. The removal of air-conditioner compressor belts.

h. The fitting of oil coolers and pressurized oil reservoirs.

i. Exhausts are free beyond the manifold, however silencing must be maintained as per exhaust dB limit.

j. Recognized replacement consumables are free i.e. air filter elements, spark plugs, points, condensers, lubricants, oil filters, ht. and lt. leads, clutches (not competition units), fuel lines & hoses (if safety considerations are met and fuel volume/pressure limits are not exceeded), distributor caps & rotors, brake hoses & pipes, engine hoses & pipes, engine bearings (not competition units), piston rings (not competition units), gaskets and seals.

k. Speed limiting/warning devices may be disabled, in the presence of the chief scrutineer or his representative, providing this can be achieved without affecting any other engine management component function.

a. Must be as listed in the vehicle manufacturers’ brochure/option package for the particular model of car entered.

 

 

a. The main spring material and dimensions are unrestricted but not their type (coil, leaf, torsion bar, rubber etc.) or number (this shall not preclude altering the number of leaves in a leaf spring). The spring seats may be relocated or be adjustable along the spring axis. When presented for scrutineering and during competition, however, any adjustment mechanism must be either welded or suitably bonded/fixed in place by such permanent means as to satisfy the officials that adjustment is no longer possible.

b. Shock absorbers/dampers are unrestricted but not their number, type (telescopic, arm etc.), system of operation (hydraulic, friction, mixed etc.) or mounting points.

c. The material in the elastic part of McPherson/Chapman strut upper turret mount/bush is unrestricted as long as the design of the mount/bush is not changed and no metallic material is used to replace elastic material.

d. Strut tower braces will be allowed for the front and rear strut/shock absorber towers. All braces must be above the wheel centre line at ride height.

a. Replacement of wheel rims, whether steel or alloy is allowed. Wheel rim diameter may be changed if not offered as an option in the original brochure. If this is done, the fitted wheel diameter (wheel rim with fitted and correctly inflated tyre) must not be less than the overall diameter of the original standard wheel with OEM tyre. Up to a maximum of 6" width is permitted or as offered as standard or an option by the manufacturer.

b. Spacers are free but track width must not be more than 2" wider than standard.

c. All wheel rims fitted to the vehicle must be the same diameter.

a. Brake pad and brake lining material is unrestricted as well as their mountings (riveted, bonded etc.) provided that the contact surface of the brakes is not increased.

b. The fitting of brake servos.

c. Anti-lock braking systems may be disabled in the presence of the chief scrutineer or his representative, providing this can be achieved without affecting any other function.

a. The removal of carpets and floor mats.

b. Fitting of nonstandard front seats and steering wheels providing they are able to satisfy the scrutineer’s safety requirements. No go-kart type seats will be allowed.

c. Fitting of additional instruments.

d. The removal of the spare tyre, jack and wheel tool.

e. Rear seats may be removed if a 4-point or greater roll-cage is fitted.

f. The absence of breakable & detachable trim, internal & external, up to a maximum of 5 Kgs.

g. Sump and tank shields are unrestricted.

Cars will be divided into four Groups - Groups 1, 2, 3 and S. Cars in Group 1 will be classified according to power to weight ratio. Cars in Groups 2 and 3 will be divided into classes as follows:

GROUP 1 -

CLASS 1. Less than 80 BHP/Tonne

CLASS 2. 80 BHP/Tonne to less than 100 BHP/Tonne

CLASS 3. 100 BHP/Tonne to less than 120 BHP/Tonne

CLASS 4. 120 BHP/Tonne to less than 140 BHP/Tonne

CLASS 5. 140 BHP/Tonne to less than 160 BHP/Tonne

GROUP 2 -

CLASS 1. 0 to 1300 Cc’s.

CLASS 2. 1301 to 1600 Cc’s

CLASS 3. 1601 to 2000 Cc’s

CLASS 4. 2001 Cc’s and upwards

CLASS N. 4WD cars

GROUP 3 -

CLASS 1. 0 to 1600 Cc’s

CLASS 2. 1601 Cc’s and upwards

CLASS A. 4WD cars

Rotary engines cc equivalent = 2 x swept volume

e.g. 12A = 2292 Cc’s 13B = 2608 Cc’s

Weight Factors

- For a conventional 2 or 3 valve per cylinder engine - 0.70 Lb./Cc

- For a conventional 4 and up valve per cylinder engine - 0.85 Lb./Cc

- For Rotary engines - 12A 1820 Lbs. minimum, 13B 2050 Lbs. minimum.

 

 

GROUP S -

Weight Factors

a. Change of engine is allowed and the car will be classified according to the size in Cc’s of the engine fitted. Engines used must retain the same number of cylinders and configuration i.e. in-line 4 cylinder for in-line 4 cylinder. All engines must be production car engines.

b. No Nitrous Oxide injection is allowed.

c. The block, crankshaft and connecting rods must be standard production items for the engine chosen. The block may be bored by up to 1 mm and be classified according to original cubic capacity, or be bored/sleeved in excess of 1 mm and be classified according to its actual cubic capacity. Bearings, bolts, gaskets, seals, oil pump and oil pump pick-up are unrestricted.

d. Alternative pistons may be used provided they comply with original manufacturer’s general specification - i.e. weight (5% tolerance) and number of rings. Compression ratio is free and machining of the piston is allowed.

e. The head fitted must be the production head used by the manufacturer for the block utilized and oriented in the same way. Machining, porting and polishing of the head is allowed. Valve springs, guides, lash caps, seats and collets are free. The valve head diameter must remain standard but the shape and material may be altered.

f. It is permitted to close any unused apertures in the cylinder head and block where these may be redundant.

g. Camshafts, their material, timing, type and dimensions of the pulleys, chains and belts are free. The camshaft followers, shims, rockers and push-rods are free. Cars fitted with four or more valves per cylinder engines with non-standard cams will be moved up one Class (e.g. a twin-cam 16-valve 1300 Cc engine with modified camshafts will run in Class 2 - 1301 - 1600 Cc). Standard cams must be retained for four or more valves per cylinder engines over 2000 Cc. Under 1000 Cc multi-valve engines remain in Class 1.

          h. Exhaust manifolds and exhaust systems are unrestricted.

i. Only original manufacturers’ standard flywheels may be used but these can be machined.

j. Non-standard clutch discs and pressure plates are allowed.

k. Crankshaft doweling and flywheel bolts are unrestricted.

l. Forced induction systems are unrestricted.

Engines with forced induction will have 50 % added to the cubic capacity; This calculated capacity will determine which Class the car will run in.

m. Engine management systems and electronics (ignition, fueling etc.) are unrestricted.

n. Dry-sumping is not allowed, however, modifications to engine wet-sump are unrestricted.

o. Rotary engines competing in this Group will have 100 % added to their measured Cc’s to determine the Class in which they will compete. No bridge or peripheral porting allowed. No competition gear sets allowed. All engine seals must be standard.

          p. Cooling fans are unrestricted.

q. Intake manifold, carburetors and fuel injection are unrestricted.

a. Standard production gearboxes must be used and must fit the chosen engine without alteration to, or replacement of, the bell housing, use of adapter plates or alterations to the block.

b. In the case of RWD cars the rear axle must be the original axle supplied with the body shell used or, if changed, the axle supplied by the manufacturer for the engine used. Differential units and final drive gears fitted to FWD gearboxes must do so without alteration to, or machining of, the gearbox casing.

c. Limited-slip and welded differentials are allowed.

d. Final-drive ratios are unrestricted.

e. Drive shafts, universal joints and C.V. joints are unrestricted.

f. External gear selection mechanisms are unrestricted as long as the standard shift pattern is retained.

a. The position of the rotational axis of the mounting points of the suspension to the wheel uprights/axles and to the bodyshell (or chassis) must remain unchanged - this shall not preclude the use of strut top mounts that allow for camber/castor adjustment and fit without alterations to the bodyshell. All suspension members must retain their original function (except in e.).

b. The suspension mounts may be modified by using different bushing material, brackets, bolts or rose-joints.

c. The main spring material and dimensions are unrestricted but not their type (coil, leaf, torsion bar, rubber etc.). The spring seats may be relocated or be adjustable along the original spring axis. A spring may be replaced with two or more springs of the same type, concentric or in series, provided that they can be fitted without any modifications to the mounting points other than those specified in this article.

d. Shock absorbers and struts are unrestricted but not their number, type (telescopic, arm etc.), system of operation (hydraulic, friction, mixed etc.) or mounting points.

e. Anti-roll bars may be replaced (provided that their mounting points remain the same), added (where there was none before or to supplement an existing anti-roll bar) or removed entirely.

f. Panhard rods and anti-tramp bars may be added but not by of moving, or removing, any original suspension member (other than in e.).

g. Ride height may be altered but not by way of altering the suspension mounting points.

h. Steering mechanisms and their mountings are unrestricted.

i. Wheel hubs/uprights may be modified/changed to facilitate the fitting of different brakes, bearings, driveshafts, struts etc. where allowed.

a. Maximum wheel rim width of eight (8) inches is allowed. Diameter optional up to a maximum of 2" over standard.

b. Only tyres listed in Appendix B and C are legal for use in Group 2. No tampering with tyres is allowed including grooving or application of chemicals. See. Competitors are advised that if they would like to use a tyre in Group 2 which is not listed in Appendix B or C then the Classification & Regulations Committee should be provided with all the relevant details of the tyre for consideration for possible inclusion in the list. This list will be updated as necessary, there will be a 6 month waiting period before any newly approved tyre can be used. See Appendix C for the list of legal tyres in Group 2.

c. Track width will be limited to 4" over standard.

a. Brakes are unrestricted except for brake discs which are only limited in their diameter. Front brake disc diameter can only be increased by one inch over standard. Rear discs cannot be any larger than maximum allowed front diameter.

a. The cars may not be lightened in any way other than the allowances made under "free of penalty in all groups".

b. Fender extensions are allowed provided that no more metal than is necessary to install the extensions is removed and the modifications to the wheel arches/fenders are carried out in such a way as to maintain the structural integrity of the vehicle. Where the rear outer wings/fenders are cut to allow greater wheel clearance the inner wheel-arch must be re-welded (no fiberglass panels) to the outer wings/fender with fabricated panel etc. Inner wheel arches may not be altered other than to extend them to be re-welded to the outer wing (no fabricated tubs).

          c. Roll cages must be fitted as per Appendix A, item 4.

d. Firewall may not be moved or altered. To facilitate the fitting of a roll cage, holes may be made in the bulkhead to allow the passage of roll cage bars. These holes must be completely resealed to prevent the passage of flames or liquids. Beating, not cutting, of firewall is permitted to facilitate fitting of engine ancillaries (e.g. Carburetors).

          e. No after-market aerodynamic devices allowed.

f. The location of the battery and reservoirs/tanks (not fuel) may be changed.

g. Certified fuel cells may be used as long as bodywork is not altered to facilitate fitting and the original fuel tank is not removed.

a. In each Class all cars will meet or exceed an official minimum weight as raced but without fuel. It is not the intention of these rules to allow tubular frame (or the like) chassis to compete in this Group.

b. In consideration of safety the following is a guideline to lightening and preparation of Group 3 vehicles. The original roof and A, B and C pillars must be retained. Lightening by drilling holes may be considered provided strength is not compromised. Forward bulkhead cannot be lightened but only modified to facilitate fitting of engine ancillaries. The bulkhead must, however, be airtight between engine and passenger compartment. The same applies to rear engine vehicles. The floor in the area between the forward bulkhead and forward of the "B" pillar cannot be lightened, however it may be modified to attach seats, roll cages, exhaust etc. All other panels can be lightened or substituted. The passenger compartment must be maintained so that stones etc. cannot enter the passenger compartment from below or from wheel arch area. See Appendix A for further details.

a. Engines must retain production car blocks and remain in the same general location and in the same mode (i.e. transverse or longitudinal etc. ) as the production vehicle.

b. 50 % will be added to the cubic capacity of forced induction engines with regard to calculating vehicle weights.

c. Forced induction Rotary engine cars must weigh 2366 Lbs. for 12A engines and 2665 Lbs. for 13B engines. No after-market forced induction will be allowed on rotary engines.

a. Gearboxes shall be unrestricted.

        a. Suspension shall be unrestricted.

        a. Maximum rim width is 10 inches. Diameter unrestricted.

a. Brakes shall be unrestricted.

a. The silhouette of the vehicle as seen from the side elevation above wheel centers must be maintained except for the bonnet and trunk/tailgate.

b. Aerodynamic devices, such as spoilers, skirts etc. will be allowed subject to the regulations.

1) Front spoilers/splitter may be added below the plane of the front wheel hubs, within the perimeter contour of the coachwork as viewed from above, however it can extend forward up to a maximum of 9" ahead of the original bodywork. The underside of the front spoiler may be shrouded or covered with a plate.

2) Skirts fitted between the front and rear wheels may not extend beyond the outer edge of the wheels or wheel arches, whichever is greater.

3) Rear wings/spoilers may have a maximum area of 780 sq. inches, including lips, tabs and side plates, and be no wider than 74". The wing must fit within the contour of the car as seen from above. The top most part of the wing must be no more than 6" above the highest point of the roof. These wings must be attached to the tailgate/trunk lid or "C" pillar. Only in the absence of a tailgate/trunk lid may the wing be fixed to the rear bodywork.

c. Door bars must be fitted to the roll cage where driver/navigator door is lightened, bars must be the same size and thickness as roll cage.

a. Electrical system shall be unrestricted.

Will consist of any entirely locally fabricated chassis or production-car based four-wheeled vehicle with four wheel brakes which complies with the following regulations:

4WD vehicles will not be allowed in this group.

          a. Engines must use production blocks.

b. Nitrous Oxide injection is allowed with a 15 % increase in Cc’s of the engine used.

c. Forced induction will incur a 50 % increase to the Cc’s of the engine used.

Please note that the weight per Cc of any car using Nitrous Oxide injection or forced induction will be based on the corrected Cc’s of the engine as outlined above. Also, any combination of Nitrous and forced induction will incur a cumulative percent increase in Cc’s i.e.- 15 % for Nitrous Oxide PLUS 50 % for forced induction.

        a. Transmission and final-drive shall be unrestricted.

a. All welded joints must be seen to be free of cracks and slag.

          a. Maximum rim width is 8 inches. Diameter optional.

b. See Appendix B and C for a list of legal tyres in this Group.

          a. All four wheels must be observed to be locking.

          b. There must be a functioning handbrake.

SAFETY

List of legal tyres for Group 1.

TARMAC TYRES

Avon CR28, CR22, CR18

Bridgestone RE88, SF321, 310 Turbo, SF350, RE71, RE710, Conselfa

          Kumho 711, 756, 768

          Michelin MX, MXL, MXV, MXV2, MXV3A, Pilot Series

Pirelli P6, P8, P600, P700Z, P44, P500, P77, P4000, P2000, P Zero, P6000, P5000, P200, P1000, P400, P7R, P7F

          Goodyear Eagle, GT, Ducaro

Yokohama Y350, Y352, GT Special 350/351, A509/510, A008

          BF Goodridge Radial T/A, Euroradial T/A, Comp T/A ZR

          Hankook Ventus Plus 4

        LOOSE/RALLY TYRES

        Michelin M4, M5, L5

        Bridgestone RE39R, RE43R, RE46R, RE360

        Pirelli SG90 (T), ASG (K)

        Colway Rally Plus, MS, Rally Plus 4

        Hankook 909 (studs removed)

List of legal tyres for Group 2 (NOTE: Gp. 1 tyres are allowed).

        TARMAC TYRES

        Bridgestone RE61S, 610S, 520S, RE71S

        Michelin MXV Coupe

        Pirelli P-Zero, P-Zero Porsche Club

        Goodyear Eagle GT+4

        Yokohama A008R, RS, TU, II

        Hoosier Street TD, Autocross, Dirt Stocker, Street TD Radial, Autocross Radial

        Kumho V700

        LOOSE/RALLY TYRES

        As for Group 1.