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DRAFT!
7.6 Driver-Passenger Compartment/Trunk
7.6.1 The driver and passenger seats, seat tracks and/or brackets may be replaced, removed or reinforced. All driver’s seats shall be firmly mounted and braced as per Redline Time Attack Standards.
7.6.2 Any steering wheel or shift knob complying with the Redline Time Attack Standards may be used.
7.6.3 Gauges, instruments and radios may be removed, replaced, or added in any location. The dashboard maybe be modified or removed.
7.6.4 Any interior mirror may be used. Exterior mirrors must remain stock.
7.6.5 Any interior parts or panels within the passenger compartment and/or trunk may be removed provided all other rules are met. Non-structural sheet metal may also be removed. The doors may be modified per rule 5.11.
7.6.6 The addition of a dead pedal/foot rest and heel stop are permitted and recommended as are modifications to the foot pedals, including pedal covers, to improve the comfort of and control accessibility to the driver. Pedal covers must be securely fastened.
7.6.7 All holes in floors and firewalls must be sealed according to Redline Time Attack Standards.
7.7 Ballast
Ballast can be added in order to meet the power to weight ratio of the MPTCC classes. Ballast may be placed in any location provided it is securely fastened and approved by Redline Time Attack tech and safety officials. Each ballast piece may not be taller than three inches or stacked higher than three inches.
7.8 Catch Tanks
All engine breathers and coolant overflow lines must vent to a catch tank of adequate capacity to hold any potential overflow. Catch tanks may not be mounted in the driver’s compartment.
7.9 Engine Coolant
The only engine coolant used in the radiator shall be water, though surfactants such as Redline “Water Wetter” or Neo Synthetics “Keep Cool” are allowed. The intent of this rule is to avoid slick track conditions produced by spilled antifreeze, not to limit water additives.
7.10 Brakes
Brake systems are unlimited if they are commercially available to any competitor.
7.10.1 Brake pads, brake linings, and brake fluid are unrestricted. Brake rotors may not be made of carbon carbon or MMC
7.10.2 Front brake backing plates may be removed or modified. Air ducts may be fitted to the brakes provided that no changes are made in the body/ structure for their use, except where permitted in these rules.
7.10.3 Brake lines may be replaced with steel lines or Teflon lined metal braided hose. Non-stock brake proportioning valves may be used. Any master cylinder may be fitted in place of the stock master cylinder; provided that its location and mounting is the same as stock (i.e. must be a ‘bolt-in’ installation). Racing type, dual master cylinders, pedal assemblies and balance bars are not permitted.
7.10.4 ABS systems can be disabled.
7.10.5 The parking brake and associated mechanisms and components may be removed
7.11 Suspension
7.11.1 The suspension configuration must remain as stock, for instance Beam axles cannot be converted to IRS, Strut type suspension cannot be converted to multi link or A arm. The factory suspension pick up points must be retained and used.
7.11.2 The suspension pick up point locations on the factory unibody or sub-frame can be relocated within a 1 inch circle from the stock location.
7.11.3 Factory pick up points can be reinforced as long as the stock unibody or sub-frame structure remains.
7.11.4 Shock absorbers and springs are open. Shock absorbers must stay in their stock location, for instance, converting the shocks to inboard with progressive rocker arms and push rods would not be allowed. Converting divorced spring and shock assemblies to coil-over such as what is common with the Nissan 350Z and 370Z is allowed. Active suspension is not allowed.
7.11.5 The fitment of aftermarket camber-caster adjustment plates is permitted. Modification of the top of the strut tower to facilitate installation or increase range of adjustment plates is permitted.
7.11.6 The stock spindles and uprights must be retained. Hubs can be modified.
7.11.7 Anti-swaybars are open with the exception of no in cabin adjustment.
7.11.8 The suspension arms and links can be replaced with adjustable aftermarket parts with spherical bearings or harder bushings if they are available for purchase by any competitor.
7.11.9 The suspension cross members cannot be replaced, repositioned or altered beyond 7.11.2. Any bushing is permitted, but the location and method of attachment to chassis cannot be modified.
7.12 Transmission/Clutch
7.12.1 Dog engagement transmissions and sequential shifters are not allowed
7.12.2 The fitment of any aftermarket limited-slip differentials is permitted.
7.12.3 Any shift lever may be used, including aftermarket ‘short shift’ kits that change the shift lever’s fulcrum point. Shift linkage and shift linkage mounting points are to remain stock.
7.12.4 Any surface treatment (cryo-treating, WPC, shotpeening, etc) can be applied to the gears, as long as their material and dimensions remain stock.
7.12.5 Clutches and flywheels are open.
7.12.6 A transmission oil cooler may be added. These are unlimited in design, provided that the sole purpose is to cool the transmission fluid.
7.12.7 Any commercially available transmission, differential, limited slip or differential gear ratio may be used. Transmissions must be production based. Racing transmissions like Xtrac, G-Force, Quaife, Wiessman etc. are not allowed. Constant mesh gear set conversions are not allowed. No alternative transmission gear ratios are allowed other than swapping different OEM factory gears between transmissions of the same type. No bespoke parts are allowed although different parts may be swapped from other cars as long as they are production based. Front engine, front transmission cars may not be converted to a rear mounted transaxle unless originally equipped as such.
7.12.8 The fitment of a transmission bell housing scattershield is recommended but not required.
7.13 Cooling System
7.13.1 The vehicle’s cooling system, including fans, radiator, fluid pumps, and oil/fluid coolers, is unregulated, provided that the sole intent of such modifications is to increase the vehicle’s reliability and durability in hot weather conditions
7.13.2 The vehicle’s structure (including radiator core support) can be modified in order to accommodate cooling system modifications.
7.14 Wiring/Electrical
7.14.1 Vehicle wiring may be added, removed, re-routed, or in any way modified provided that it is done in manner that does not compromise safety.
7.14.2 Any battery may be fitted, and its location may be moved relative to stock provided it is securely fastened. Batteries located in the passenger compartment must be in a battery box consistent with the Redline Time Attack rules unless a “dry cell” battery is used.
7.15 Data Acquisition Systems
Any Data Acquisition system is allowed. Two-way active-telemetry is not allowed.
