Global Racing League Association (GRLA)
The GRLA was founded in 1965 to consolidate different motorsport disciplines under one central leadership and better implement rules for motorsports overall.
Essentially, the GRLA took all existing motorsports and split them into a few main categories and combining similar sports together into one sport.
As of 2010, these are the current categories and sports classified by the GRLA
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Circuit
– Super Silhouette (SS) - SS is intended for race-spec versions of dedicated sports cars
– Super Sport (SS2) - SS2 is intended for race-spec versions of sports trim mid/full size sedans and wagons.
– Formula Hybrid (FH) - FH is a higher power rated version of Cup with the addition of hybrid systems.
– Cup - Cup racing is done with modified compact sedans and hatchbacks -
Rally
Popularity
Vehicle Spec Restrictions
Circuit
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SS
– sports bodystyles
– engine placement is not restricted
– suspension type must not be active (for Gen4, allows use of next gen suspension types)
– engines:
-----reciprocating engines cannot have fewer than four cylinders
-----reciprocating engines cannot have more than twelve cylinders
-----turbine engines cannot exceed 1.8L of equivalent displacement
-----rotary engines cannot exceed 2.4L of displacement
-----use of in-hub electric motors was banned starting in the second season of Gen3
-----engines with turbo or super chargers cannot exceed 18psi, 24psi in AP mode
-----rotary engines with turbo or super chargers cannot exceed 12psi, 18psi in AP mode
– engine cannot make more than 400hp (horsepower was increased to 450hp for Gen4)
– intake/exhaust type is not restricted
– must use GRLA approved RRRR spec racing tires
– must use steel or alloy wheels
– must use a minimum of front disc brakes (4 disc brake was mandatory starting midway through
Gen2)
– must meet minimum safety standards
–from Gen4, regenerative braking systems must be equipped on drive wheels ONLY
–from Gen4, allows use of next gen engine technology
–from Gen3, allows use of manual controlled drag reduction system (DRS)
–from Gen4, allows use of manual controlled air brake (AB)
–from Gen4, allows use of Aux Power (AP) system
-----voltage increase from a secondary battery or capacitor, or from induction Tesla coil
-----for hybrid and electric cars, increases voltage input to the electric motor for temporary hp boost
-----for ICE cars, increases ignition system voltage OR increases boost cut ceiling temporarily
-----can be used in DRS zones and cannot be used in conjunction with DRS
-----can be used in AP zones
– must be based on a production car -
SS2
– mid or full size sedans and wagons
– engine must be front mounted
– drivetrain type is not restricted
– suspension cannot be active
– engines:
-----reciprocating engines cannot have fewer than four cylinders
-----reciprocating engines cannot have more than 8 cylinders
-----turbine engines cannot exceed 1L of equivalent displacement
-----rotary engines cannot exceed 1.7L of displacement
-----use of in-hub electric motors is not allowed
-----engines with turbo or super chargers cannot exceed 12psi
-----rotary engines with turbo or super chargers cannot exceed 8psi
– engine cannot make more than 280hp (horsepower was increased to 325hp for Gen4)
– intake/exhaust type is not restricted
– must use GRLA approved RRR spec racing tires
– must use steel or alloy wheels
– must use a minimum of front disc brakes (4 disc brake was mandatory starting midway through
Gen2)
– must meet minimum safety standards
–from Gen3, regenerative braking systems must be equipped on drive wheels ONLY
– must be based on a production car -
Formual Hybrid(created in 1998)
– engines must have 4 cylinders. (After the year 2010, engines must have 4 cylinders or less. No electric vehicles allowed)
– hybrid system maximum output of 180hp (After the year 2003, hybrid system output was increased to 220hp)
– engines cannot be larger than 2000cc (2L), or no larger than 1600cc (1.6L) if using a turbo charger or supercharger
– must use GRLA provided 90AKI fuel
– must use GRLA approved RR spec racing tires
– no race engine components
– vehicles must be front wheel drive
– engine placement is not restricted
– it cannot have a coupe, crossover, van, or SUV bodystyle and the wheelbase must be shorter than 100 inches
– must weight more than 2000 pounds (dry weight)
– wheels must be no larger than 16 inches, must be of a steel or alloy material
– must have standard/progressive springs, twin/mono dampers, and passive sway bar
– front suspension type must be McPherson Strut, no restrictions on rear suspension
– requires anti-lock brakes
– minimum safety rating of 40
– no active features
– cannot use electric limited slip differentials
– brakes must be disc front and rear
– must be based on a production car -
Cup (Cup racing was created in 1985)
– engines must have 4 cylinders. (After the year 2010, engines must have 4 cylinders or less. No electric vehicles allowed)
– engines can only have a maximum of 150hp (After the year 1995, engine power output was increased to 200hp)
– engines cannot be larger than 2000cc (2L), or no larger than 1600cc (1.6L) if using a turbo charger or supercharger
– must use GRLA provided 90AKI fuel
– must use GRLA approved R spec racing tires
– no race engine components
– vehicles must be front wheel drive
– engine placement is not restricted
– it cannot have a coupe, crossover, van, or SUV bodystyle and the wheelbase must be shorter than 100 inches
– must weight more than 2000 pounds (dry weight)
– wheels must be no larger than 16 inches, must be of a steel or alloy material
– must have standard/progressive springs, twin/mono dampers, and passive sway bar
– front suspension type must be McPherson Strut, no restrictions on rear suspension
– requires anti-lock brakes
– minimum safety rating of 40
– no active features
– cannot use electric limited slip differentials
– brakes must be disc front (After year 1995, all brakes must be disc, calipers cannot be more than 4 piston)
– must be based on a production car
Rally restrictions are WIP