MCA Suspension SA TIME ATTACK 2017 - CLASS REGULATIONS

Last updated: Tue Aug 15, 2017 11:43 am

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VEHICLE CLASS REGULATIONS / MODIFICATIONS:
All vehicles must comply with Schedules A & B of the General Requirements for Automobiles of the current CAMS Manual of Motor Sport. Open Wheel vehicles are eligible for Competition. All Vehicles must retain the original firewall. Any freedoms permitted in a lower class are also permitted in the higher classes. Ie. If Clubsprint class allows carbon bonnet all other classes can also use a carbon bonnet along with additional freedoms documented in each category.


BODY
• All convertible type vehicles must be equipped with a hard top or a roll cage that complies with CAMS General Requirements for Automobiles, and/or meets the approval of the Chief Scrutineer.
Street Class
• Alternative materials are permitted for the Front Bar, Bonnet, Side Skirts, Rear Bar and Boot provided they follow the same shape as the original part.
• The remainder of the vehicle body must remain as original from the manufacturer. (no wide body kits / flares etc).
Clubsprint:
• Alternative materials are permitted for the Front Bar, Bonnet, Side Skirts, Rear Bar and Boot provided they follow the same shape as the original part.
• Alternative materials are permitted for front and rear flares however the fender must be of the original material.
• The top 1/3 of the tyre must not protrude outside the guard/flare when the wheels are facing forwards.
• The remainder of the vehicle body must remain as original from the manufacturer. (no wide body kits).
Open:
• Alternative materials are permitted for removable panels, however all bodies must follow the same shape and retain the original look and style of the vehicle. Front and rear bars may be modified to incorporate aero design. Front bar may not extend further than 150mm forward and rear bar no further than 100mm rearward than the vehicles bodywork.
• Total Vehicle width in front view (measured at its widest point, excluding mirrors) must not exceed 250mm wider than original.
• Headlights may be removed but replaced with suitable decals where possible in the original location, however vehicles participating in the night sessions must have working front/rear lights.
• Windows may be replaced with Lexan, however original glass windscreen must be retained.
Pro:
• Alternative materials are permitted however all bodies must follow the same shape and retain the original look and style of the vehicle.
• Front and rear bars may be modified to incorporate aero design. Front bar may not extend further than 150mm forward and rear bar no further than 100mm rearward than the vehicles bodywork.
• Total Vehicle width in front view (measured at its widest point, excluding mirrors) must not exceed 250mm wider than original.
• Headlights may be removed but replaced with suitable decals where possible in the original location.
• Windows may be replaced with Lexan, however original glass windscreen must be retained.


CHASSIS
• All vehicles must retain the original firewall.
• Modifications can be made for transmission clearance, wiring or roll cage, however the resulting bulkhead must resemble the original and continue to be both structural and create seal between the forward area and the cockpit. Any replacement material must be of the same thickness as the original firewall and of similar material (e.g., steel for steel, aluminium for aluminium).
• Original shock towers must be retained.
• No fully tubular construction or composite monocoques are allowed.
Open:
• The rear most part of the engine block may be no more than 2 inches rearward of the most forward point of the firewall. If the vehicle is rear engine, the front most part of the engine block may be no more than 2 inches forward of the most rear point of the mainly vertical firewall.
• The Firewall may be modified for clearance of engine but must remain in original position.
• Aftermarket sub frames are permitted to be used provided they are bolted in.
• Wheel arch “tubbing” with the sole purpose of providing clearance for tyres on full bump is permitted front and rear
Pro:
• Composite/ Carbon fibre materials can be used only in non-structural components unless originally fitted.
• Forward retention of the original chassis: Original frame rails (see definitions) and shock towers must be retained from the upper portion of the shock towers and back. Modifications are allowed solely for the addition or relocation of suspension pickup geometry.
• Rear retention of the original chassis: Original floor pan and frame rails must be retained from the firewall to the forward most point of the rear wheel arch.
• Modifications are allowed only as needed for exhaust, driveshaft clearance, mounting of roll cage, seat or other safety items. Under no circumstances can any portion of the frame rails or floor pan be removed or modified from the rear of the driver’s seat forward to the firewall except as required for exhaust clearance or the detailed addition of bushes or brackets in mounting under surfaces.


FURTHER NOTE
Any vehicles that do not meet the definitions listed will need to be considered on a case-by-case basis. If your vehicle does not have shock towers, frame rails, or any other items listed or you are unclear (for example a vehicle which came equipped with push rod suspension) you must submit your vehicle modifications for approval. The World Time Attack Challenge technical regulations will be used as guidance.


AERODYNAMIC AIDS
All aerodynamic additions must be within the body parameters outlined for the relevant vehicle class. Strength and method of aero component fastening will be checked thoroughly at scrutineering and if found to be unsuitable the vehicle will not be permitted to start until improvements are made to meet approval of the chief scrutineer. Active aero includes hydraulically or electronically actuated or movable components are not permitted in any class.

It is permitted to fit the following:
Street Class
• No aftermarket aerodynamic aids are permitted in Street Class.

Clubsprint:
• Front under tray/splitter must follow the outline of the front bar and may extend 50mm ahead of the vehicles bodywork, no further rearward than the front axle and no wider than the front OEM guards.
• Front canards/winglets are permitted but must not extend wider than 50mm beyond OEM coachwork.
• OEM rear wings or aftermarket rear wings with up to two separate elements may be used in an unmodified form. The width of the wing must not exceed the widest part of the body. Only one aftermarket wing per vehicle is permitted.
• Rear wing must be fitted as such to be over the body or boot in plain view, except in case of a hatchback, the rear wing assembly is only required to begin over the body. No portion of the wing can be higher than the horizontal line from the highest point of the roof except in the case of a hatchback where the wing can be no higher than 150mm from the highest point of the wing to the roofline and must be on the rear portion of the roof.
• Rear diffuser/ under tray must not extend beyond the vehicles bodywork and forward only to the rear axle.
• Aftermarket side mirrors are permitted.
• Side skirts may not extend inboard more than 250mm under the vehicle.
Open:
• Front under tray/splitter must follow the outline of the front bar and may extend only 150mm beyond the original coachwork longitudinally forward. It can extend rearwards to the front axle centreline.
• Front aero is permitted but must not extend higher than the top of the bonnet or 100mm beyond the vehicle bodywork at its closest point; whichever is smallest.
• Front canards/winglets are permitted but must not extend more than 75mm beyond the coachwork. And must remain within the maximum vehicle width defined in vehicle modifications – Body section.
• Rear Wing assembly design is free and may have up to two elements. It must extend no higher than the horizontal line from the highest point of the roof, no wider than 100mm per side wider than the body width and 100mm further rearward than the original coachwork except in the case of a hatchback where the wing can be no higher than 250mm from the highest point of the wing to the roofline and must be on the rear portion of the roof.
• End plates are measured separately with a maximum thickness of 10mm.
• Rear diffuser/under tray may extend up to 100mm beyond the vehicles bodywork and forward only to the rear axle.
• Original under body floor between the axles is required, no flat bottoms, diffusers, etc may extend forward of the rear axle or aft of the front axle.
• Side skirts may not extend inboard more than 250mm under the vehicle. [Note: Slight difference from WTAC]
Pro:
• Front under tray/splitter may extend up to 300mm forward of the vehicles bodywork.
• Front appendages may not be fitted higher than the bonnet. Front/rear winglets/canards cannot extend more than 300mm per side past the splitter/under-tray maximum overhang. End plates are measured separately with a maximum thickness of 10mm.
• Rear wing assembly design is free and may extend up to 150mm per side wider than the original coachwork in front view and above the horizontal line from the highest point of the roof. End plates are measured separately with a maximum thickness of 10mm.
• Rear diffuser/under tray may extend 300mm rearward beyond the furthest point of the vehicles bodywork.
• Flat floors are permitted in Pro class. The flat floor is not permitted to be part of the structural monocoque. Mechanical force is not permitted to be used with the design of the floor.


ENGINE
Engine modifications are free with the following exceptions:
• All vehicles must use unleaded or E85 fuel. Fuel additives are not permitted.
• Engine changes during the event are permitted subject to the approval of the chief scrutineer.
• Nitrous systems are not permitted in open and Pro class only.
Street Class
• Vehicles must retain the originally designated engine.
• Bolt on accessories to the engine are permitted however the original specification of turbocharger must be retained.
Clubsprint:
• Engine modifications are free except that the vehicle must retain an engine from that vehicle OEM and that has the same number of cylinders or in the case of a rotary engine, rotors must remain as per the original.
Open & Pro:
• Engine modifications are unrestricted save for the engine must be from a recognised vehicle manufacturer.
• The crankshaft centre line may be lowered. The engine positioning and mounts being free provided that its relationship to the firewall is not exceeded (see chassis section above).


EXHAUST
The complete exhaust system may be modified or replaced.
Street Class and Clubsprint:
• The exhaust must exit within 100mm of the original location and shall not protrude more than 100mm beyond the rear most portion of the bodywork.
Open and Pro:
• For rearward facing exhaust the outlet(s) shall be between 75mm and 600mm above the ground and within 100mm longitudinally of the rear of the bodywork. If the exhaust is directed sideways the outlet(s) must be located rearward of the midpoint of the wheelbase and shall not project beyond the maximum width of the coachwork or terminate more than 50mm inwards of the coachwork. A side exit exhaust must exit in a direction away from the centreline of the vehicle.


TRANSMISSION AND DIFFERENTIAL
• Clutches and flywheel are free.
• Gearbox and differential may be replaced by another of free design.
• Internal components of transmission and differential are free.
• The bell housing is free.
• Gearbox and differential oil coolers are permitted.
• Automatic transmissions if provided optionally by the manufacturer for that model are permitted.
Street Class and Clubsprint:
• Original mounting points for Transmission and Differential must be used.
• Sequential change systems are not permitted unless originally fitted.
• Sequential shifting is permitted but Paddle shifting mechanisms are not permitted unless originally fitted.
• Transmission tunnel modifications necessary to allow the fitment of a transmission are permitted.
Pro:
• Paddle shifting mechanisms are permitted.


DRIVELINE
Street Class and Clubsprint
• Original mounting points must be used.
Open:
• Replacement tail shafts are permitted.
Pro:
• Driveline is free save for original configuration must be retained eg. 2WD, 4WD.
• Mounting points are free.


SUSPENSION
• Springs and Dampers may be replaced by others of the same type and working principle. However the number of dampers per vehicle must remain as original.
• Suspension bushes are free.
• Original mounting points may be reinforced and altered in design but not in location (except Pro).
• Minimum ride heights apply as listed below. Each fully sprung part of the automobile must be at least the specified height above the ground when measured at any point within the wheelbase. The automobile ride height will be measured without the driver and tyre pressures at a minimum of 20psi.
• Sway bars are free.
Street Class
• Minimum ride height of 80mm measured as described in the suspension rule above.
• Coilovers are prohibited in Street Class – upgraded springs and dampers can be used.
• OEM Hubs must be retained on the vehicle.
• Aftermarket suspension subframes are not permitted.

Clubsprint:
• Minimum ride height of 80mm measured as described in the suspension rule above.
• Vehicle must use original chassis mounting points and uprights but suspension geometry and arms are free.
• OEM Hubs must be retained on the vehicle
• Aftermarket suspension subframes are not permitted.
Open:
• Minimum ride height of 65mm measured as described in the suspension rule above. This includes all side skirts, splitters, bodywork BUT NOT the exhaust.
• Suspension is free.
Pro:
• Minimum ride height of 50mm measured as described in the suspension rule above.


BRAKES
• The complete braking system is free with the exception of computer controlled diagonal or transverse braking systems, which are not permitted in any class unless originally fitted.
Street and Clubsprint:
• Original mounting points must be used.


TYRES
• All tyres must be marked by the organisers at scrutineering.
• The use of any tyre softening chemical on tyres is strictly prohibited and will result in immediate exclusion from the event.
• Random tyre checking will be conducted throughout the event, failure to comply will result in a penalty up to exclusion.
Street and Clubsprint:
• Tyre selection refer to Tyre list at the end of this appendix
• Maximum of 8 tyres may be used throughout the event.
• Tyres on all wheel drive vehicles must be no wider than 265 unless specified by the manufacturer for that particular vehicle in which case the tyre must match the manufacturers size specification. Two wheel drive vehicles must be no wider than 295 unless specified by the manufacturer in which case the tyre must match the manufacturers specification. With the exception of “guard rolling” or “lip rolling” no modifications are to be performed to the body or chassis to allow fitment of tyres.
Open:
• Tyre selection refer to list.
• Maximum of 12 tyres may be used throughout the event.
Pro:
• Tyre selection refer to list.
• Maximum of 24 tyres may be used throughout the event.


WHEELS
• Wheels are free and size is unrestricted however size must be appropriate for the tyres fitted.
• A maximum of one metallic spacer of maximum 30mm may be used behind each wheel. Consideration must be given to wheel stud length when fitting spacers.
• No part of the tyre may protrude outside the wheel arch when the wheels are pointing forward.


INTERIOR
• Local modification to interior for fitment of a roll cage is allowed.
• Interior is free save for the following exceptions:
Street Class and Clubsprint:
• Complete original dash must be retained; additional switches and gauges may be added.
• Original door trims must be retained.
• Replacement instrument cluster is permitted.
• Vehicles fitted with a roll cage are permitted to be fitted with a removable steering wheel.
• Heater core, air conditioning and related components that are not visible on the dash must be retained. [Note: This differs from WTAC regulations]
Open & Pro:
• Replacement door trims in alternative material are permitted. Door trims MUST be fitted.
• Driving position may be moved rearwards, but not beyond the rear foot well.
• All vehicles must retain a full length dashboard.


VEHICLE SIGNS
• Event organiser’s decals and compulsory event sponsor decals as supplied must be placed on the vehicle as per instructions provided at documentation.

• Vehicles MUST be presented at scrutineering with all compulsory decals to be passed as scrutinised. Note vehicles will not be permitted onto the track unless all decals are attached and positioned in the prescribed location. A breech of the requirement at any time during the event will result in immediate disqualification from the results of the event.


VEHICLE SUPERCAR LIST (ineligible for Street and Clubsprint Class)
Audi R8
Ferrari All
Lamborghini all
Nissan GTR(R35)
Porsche All except 924/944


NITROUS OXIDE
Nitrous Oxide is permitted on all vehicles in Pro Class and normally aspirated engines in Open.
The following details the requirements to use Nitrous Oxide. Any vehicle that does not meet these requirements will need to seek approval PRIOR to the Event for any variation.

Competitors are reminded of the dangers associated with the incorrect use of nitrous oxide. It is highly recommended that systems are sourced in complete form, from a recognised manufacturer. The following regulations apply;
a) Nitrous Lines: Must be outside of cockpit for the driver, except where the bottle is mounted in the driver's compartment, in which case the line must be plumbed outside the compartment as near as possible to the bottle outlet. Where lines pass converter or flywheel area, they must be encased in 3mm (1/8 inch) minimum thickness steel tubing. High pressure rated hose of minimum 1500 psi is required, and a sintered bronze filter, fit for purpose, must be fitted in the gas supply line.

b) Bottle Mounting: Bottles must be mounted outside of the engine compartment. Any bottle located in the driver's compartment must be mounted with metal brackets secured to a structural point of the vehicle, and a relief valve, vented outside the driver's compartment, to the atmosphere. Bottles must be upright or semi upright. Inverted bottles not permitted. Bottles must be equipped with on/off taps. Bottle shut-offs requiring special keys are not acceptable. Bottles used must be purpose built for use with nitrous oxide. Electric devices used for raising the temperature of nitrous oxide bottles must be produced for that purpose by an industry manufacturer, and may not be modified in any way.

c) Switching: Both solenoids must operate from a common switch and the system must be capable of being switched off by three means: (1) when the throttle is closed; (2) by a special arming switch that provides power to the solenoids; (3) through the normal ignition switch.

d) Markers: All vehicles using Nitrous Oxide must display special markers located on the outside of the vehicle, in the area where the supply bottle is located and adjacent to the vehicles competition No. on the side of the vehicle The marker shall be a yellow diamond with 125mm sides, with N20 printed in black letters.

e) Warning Light: A prominent blue warning light, located on the dashboard of the vehicle and visible through the windscreen, must indicate when the system is armed.


TYRES
Street Class / Clubsprint Class
ONLY tyres with UTQG rating 120 or higher are permitted for Street Class and Clubsprint Class.

This includes the following High Performance Street Tyres: Hankook Rs-3 (Z222)
Federal RSR, Toyo Proxes R1R,
Bridgestone Potenza S-02, Yokohama Advan AD08, Kumho KU36 (EcstaXS), Dunlop Direzza ZII, Dunlop SP Sport 600, BFGoodrich g-Force Rival,
Bridgestone Potenza RE-11A, Goodyear Eagle GS-D3, Falken Azenis RT615,
Nitto Invo

In general tyres "below" these in a particular Brand/Company are also eligible provided UTQG rating is 120 or higher.

Open Class / Pro Class
ONLY treaded Semi-Slick / R-Compound Tyres are permitted in Open / Pro Classes.

As a guide to true semi-slick DOT performance tyres, the following are eligible (CLASS DEPENDENT):

Bridgestone: RE540S, RE55S, RE01R, RE070
Dunlop: D01J, DZ02G, DZ03G, D83J, D93J, SP Sport Maxx
Toyo: Proxes R888, Trampio R881, Proxes RA-1 Yokohama Advan: A048R, AO50R, A032R Silverstone: FTZ RR, S585, S575
Hankook: Ventus Z221 TD
Falken: Azenis RT615, Ziex ZE-912, Ziex ZE-512, Ziex ZE-329, FK 452, Ziex S/TZ04, Azenis ST-115 BF Goodrich: G-Force T/A KDW, G-Force Sport
Nitto: NT555R
Pirelli: P Zero C, P Zero Corsa Federal: 595 RS-R, FZ-202, FZ-201
Kumho: Ecsta V700, Ecsta V70A, KU36 Michelin: Pilot Sport Cup, Pilot Sport PS2

Grooved Slicks and Full Slicks are prohibited in ALL CLASSES.

If competitors wish to confirm their Time Attack tyre choice complies or wish to add to the above list, please contact the event organisers at entries@gsr-evo-club.net

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