Prototypes added to GTX
#31948 from Club Racing Board · Recommended to the Board · Minutes (2022-01 Fastrack)
In GTX, Section 9.1.2.H., add Prototypes as follows:
9.1.2.H. GTX CATEGORY SPECIFICATIONS
“A. Purpose and Philosophy
The intent of the GTX category is to allow competition of production-based vehicles that compete in professional road racing
series in the United States.
The GTX class will have annual balance of performance (BOP) changes. Weights may be adjusted, or cars may be subject to
changes in intake restrictors to meet periodic professional series changes. Cars may be required to carry data acquisition
equipment for review of performance.
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B. Eligibility
Vehicles meeting one of the following criteria may compete in the GTX category:
1. FIA GT3:
- Cars will be approved on a case-by-case basis with supporting documentation.
- Competitors must have the FIA GT3 sheet, as approved, available for scrutineers when requested.
- Cars approved to run in accordance with their FIA GT3 specifications must adhere to those specifications.
- See GTX spec line for eligible FIA GT3 cars.
2. SRO GT4:
- Cars will be approved on a case-by-case basis with supporting documentation.
- Competitors must have the SRO GT4 sheet, as approved, available for scrutineers when requested.
- Cars approved to run in accordance with their SRO GT4 specifications must adhere to those specifications.
- See GTX spec line for eligible SRO GT4 cars.
3. TCR:
- Cars will be approved on a case-by-case basis with supporting documentation.
- Competitors must have the TCR sheet, as approved, available for scrutineers when requested.
- Cars approved to run in accordance with their TCR specifications must adhere to those specifications.
- SS ee GTX spec line for eligible TCR cars.
4. GTX Tube Frame:
- GTX tube frame cars will consist of currently classified GT1 cars with improved aerodynamics, wheels, brakes
and limited fuel injection systems. Stock car bodies permitted. GTX tube frame cars must weigh 2780 pounds.
5. GTX Grand Am Tube Frame:
- GTX Grand Am tube frame cars will consist of fuel injected tube frame cars classified in the Grand Am Road
Racing series from 2007-2013. GTX Grand Am tube frame cars must provide their Grand Am rule set and
specifications.
6. Daytona Prototype Gen # 1 (2003-2007):
7. Daytona Prototype Gen # 2 (2008-2011):
8. Daytona Prototype Gen # 3 (2012-2016):
9. Daytona Prototype International (2017-):
10. IMSA GTP (1994-1998):
- IMSA Camel Light (1985-1993)
11. Le Mans Prototype
- Le Mans Prototype 1 (1999-2013)
- Le Mans Prototype 2 (1999-Present)
- Le Mans Prototype 3 (2017-Present)
- Le Mans Prototype Challenge (2009-2018)
12. World Sports Car (1994-1998)
13. Vehicles listed in Table 4 below
C. Bodywork
1. FIA or TCR standard bodywork must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
4. Prototype standard bodywork must comply with their associated specifications.
D. Aerodynamic Devices
1. FIA or TCR aerodynamic devices must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications. Trans Am splitter tunnels and rear wing rules are
permitted. Under panning may be installed under the engine bay and rear end housing.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
4. Prototype aerodynamic devices must comply with their associated specifications.
E. Interiors
1. FIA or TCR interiors must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
4. Prototype interiors must comply with their associated specifications.
F. Chassis
1. FIA or TCR chassis must comply with their associated specifications.
2. FIA or TCR chassis weight must meet the vehicle weight listed on the associated specification line.
3. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
4. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
5. Prototype chassis must comply with their associated specifications.
G. Engine
1. FIA or TCR engines must comply with their associated specifications.
2. FIA GT3 cars must compete with the listed restriction in the specification lines.
3. SRO GT4 cars are permitted to compete without restriction.
4. TCR cars are permitted to compete with 100% engine management.
5. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications. Additionally, the following engines are permitted.
Engine Management is unrestricted.
362 cubic inch engines include:
- Chevrolet R07
- Ford FR9
- Dodge R6
- Toyota Phase 11
6. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
7. Prototype engines specifications are open.
H. Cooling System
1. FIA or TCR cooling systems must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
I. Fueling, Piping and Fuel Tanks
1. FIA or TCR fueling, piping and fuel tanks must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. GTX tube frame cars may install fuel injection system, maximum throttle body size 90mm.
4. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
5. Prototype fueling, piping and fuel tanks must comply with their associated specifications.
J. Oil System
1. FIA or TCR oil systems must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
K. Exhaust System
1. FIA or TCR exhaust systems must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
4. Prototype exhaust systems must comply with their associated specifications.
L. Electrical
1. FIA or TCR electrical systems must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
4. Prototype electrical systems specifications are open.
M. Drivetrain
1. FIA or TCR drivetrains must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
4. Prototype electrical systems specifications are open.
N. Suspension and Steering
1. FIA or TCR suspension and steering must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
7. Prototype suspension and steering must comply with their associated specifications.
O. Brakes
1. FIA or TCR brakes must comply with their associated specifications.
2. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications, except brake calipers and rotors do not have a
size limit.
3. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
4. Prototype brakes specifications are open.
P. Tires and Wheels
1. Tires must conform to 9.3. Tires.
2. FIA or TCR wheels must comply with their associated specifications.
3. GTX tube frame cars shall refer to 9.1.2 GT1 category specifications, wheels may be increased to 12.5” front and 13”
rear.
4. Grand Am tube frame cars must comply with the 2007-13 GA specifications.
5. Prototype wheels must comply with their associated specifications.
Table 4
Marque Model Engine Restrictor
Min Weight
(lbs) Notes
Radical SR8 RPE 2.7L V8 NA 1775
Radical SR10
Ford Ecoboost 2.3LHigh
Output 4 cyl.
Turbo NA 1825
Radical RXC
Spyder
Ford Ecoboost 3.5LV6 Turbo
/ RPE 2.7L V8 NA 2400
Radical RXC 600R Ford Ecoboost 3.5LV6 Turbo NA 2675
Revolution A-One Ford 3.7L V6 NA 1925
Superlite Aero Sealed Katech GMLS3 6.2L
V8 NA 2180
Superlite SL-C GM LS7 7.2L V8 NA 2625
Must comply with specifications
foundhere: https://www.
scca.com/pages/ technical-
forms-and-downloads
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