GENERAL RULES

 General Rules applying to all classes. Rules may be changed or updated at any time.

 1     CLASSING

1. Any competitor is subject to approval, and the club reserves the right to disqualify any competitor or vehicle for any reason.

2. Any modification to a competitor’s vehicle must be allowed within the said class and the rule book along with the CCR. If you have any questions, please email race@ongridtrack.com.

3. 1 Driver is allowed per car.

4. The same car may not be used for multiple entries.

5. Times from vehicles not registered for OnGrid Time Attack will not be counted.

6. Times must be set in designated sessions.

7. All drivers must follow the rules found in the OnGrid CCR.

8. OnGrid Race Steward may re-class any vehicle if the vehicle greatly exceeds its class’s performance capability.

2     CHASSIS / AERO

1. Low volume production cars, open wheel vehicles, club racers and race cars that are made street legal are allowed in RACE class. (BAC Mono, Ultima GTR, Factory 5 818, Radical RXC, ETC)

2. Chevy Corvette, C7 or newer, base class is GT+

3     ENGINE / DRIVETRAIN

1. One internal combustion engine is allowed per vehicle.

2. Electric vehicle’s base class is TUNER.

4     SUSPENSION / TIRES

1. Any competitor’s tire must be readily available to other racers for purchase. If the tire is not readily available, the competitor is disqualified.

2. Top portion of the tire must fit underneath the fenders and not be viewable from directly above

5     INTERIOR / SAFETY/ MISC

1. 4 point harness must be Anti-SubMarining (ASM). ex: Schroth Rallye 4 ASM

2. Vehicles equipped with 5 or 6 point harnesses must have a 4 point roll bar at minimum.

3. Brake lights must be fully operational in all classes. Center 3rd brake light may be removed.

4. Sunroof may be removed or replaced with alternate material in all classes.

5. OEM dash may be replaced with an alternative dash if OEM isn’t readily available. Replacement dash must be the same as OEM, but may be of alternate material.

6. Head and neck restraints are highly recommended for everyone.

7. Vehicles are recommended to have a 2.5 pound, or greater, fire extinguisher within the driver's reach or fire suppression system.

8. OnGrid Race Stewards may inspect competitors’ vehicles at any time to ensure vehicle complies to the rules and safety standards.

9. All vehicles must have a front tow hook, strap, or accessible tow point.

   • Tow Point = an area on your car that can be used to tow your car.

10. Competitors must run any and all decals required by OnGrid organizers.

6     POINTS

1. Drivers must compete in a minimum of 3 rounds of competition for points to count towards the season.

2. The round with the lowest points will be dropped from the driver’s season points.

3. After every round, driver points will be given, distributed as follows:

4. Dropped points will be used for tiebreakers.
5. To be eligible for event prizes and have their season points count, drivers must display the OnGrid Time Attack Window Banner and OnGrid Door Cards. There is a one-time exception allowed in the season, but this disqualifies drivers from receiving event prizes for that event.

 SPORT

ENGINE / DRIVETRAIN 

• Engines allowed: 

• Naturally Aspirated: 2.0L Max

• Honda K swaps are prohibited

• Honda F series engines prohibited.

• Rotary Engines must be N/A 2 Rotors Max

• No Forced Induction

• No Electric Vehicles (EV) allowed

• 93 octane gasoline maximum. No other alternative fuels are allowed. No fuel additives are allowed.

• Nitrous is prohibited. 

• Dogbox and sequential transmissions are not allowed. 

• Drivetrain conversions are not permitted

SUSPENSION / TIRES 

• Maximum tire width: 235 (average if staggered)

• Tires must have a UTQG Rating of 100 or higher. 

  • SuperCar 3R, Cup 2 R, and Vitour tires are prohibited. (Updated 3/12/24)

  • Toyo RR is permitted

  Maximum 2-way Shocks/Struts are allowed. 

• Active suspension is prohibited.

• Aftermarket suspension components are permitted as long as they retain OEM geometry pick-up points and roll centers.

•  Bushings, swaybars, end links, ball-joints, and tie rod ends are exempt from this rule

CHASSIS

• No tube-frame, open wheel, or kit car vehicles allowed.

• Cars must keep stock chassis with no modifications unless to add chassis bracing, ie: e46 weld-on chassis bracing. No aftermarket tubular or carbon chassis components are allowed.

• No Aftermarket subframes are permitted.

• The shock tower may be modified only to allow the installation of camber/caster plates, and only as required to obtain the necessary camber and caster.

AERO / BODY

• Adjustable and GT style wings are prohibited. (See image below)

• Aftermarket bumpers, lips, spoilers, adjustable duckbills, and non-adjustable single-piece wings allowed. 

• Non-OEM front bumpers may not have a built-in lip that protrudes more than 3” when viewed from above.

• Canards are prohibited.

• Splitters and aftermarket 3D undertrays are prohibited.

• Aftermarket rear bumpers are allowed, rear bumpers may be trimmed as long as they cover the impact bar and frame rails.

• Diffusers are prohibited (cosmetic rear bumper “lip” style is allowed)

• Hoods, hardtops, fenders, flares, vents and widebody panels are open.

• Doors must remain OEM material

• Glass may be replaced with Lexan, polycarbonate, or other alternative materials.

• Flat bottom floors are prohibited.

 INTERIOR / SAFETY/ MISC

• Weight reduction allowed. 

• Anything behind the driver’s seat, carpet, headliner, and radio/speakers may be fully removed. Passenger seat is required.

• OE Dashboard is required, airbags may be removed.

• Door panels may be replaced by alternate materials but are required unless door bars are present. 

• Side windows may NOT be removed unless a cage with door bars is present.

• Vehicles must have headlights and taillights. 

• Headlights and taillights must be in working order.

SPORT+

ENGINE / DRIVETRAIN 

• Engines allowed: 

• Naturally Aspirated: 3.0L Max

• Forced Induction: 1.6L Max

• Rotary Engines must be N/A - 3 Rotors Max

• No Electric Vehicles (EV) allowed

• 93 octane gasoline maximum. No other alternative fuels are allowed. No fuel additives are allowed.

• Nitrous is prohibited. 

• Dogbox and sequential transmissions are not allowed. 

• Drivetrain conversions are not permitted

SUSPENSION / TIRES 

• Maximum tire width: 255 (average if staggered)

• Tires must have a UTQG Rating of 100 or higher. 

• SuperCar 3R, Cup 2 R, and Vitour tires are prohibited. (Updated 3/12/24)

• Toyo RR is permitted

• Maximum 2-way Shocks/Struts are allowed. 

• Active suspension is prohibited.

• Aftermarket suspension components are permitted as long as they retain OEM geometry pick-up points and roll centers.

•  Bushings, swaybars, end links, ball-joints, and tie rod ends are exempt from this rule

CHASSIS

• No tube-frame, open wheel, or kit car vehicles allowed.

• Cars must keep stock chassis with no modifications unless to add chassis bracing ie: e46 weld-on chassis bracing. No aftermarket tubular or carbon chassis components are allowed.

• No Aftermarket subframes are permitted.

• The shock tower may be modified only to allow the installation of camber/caster plates and only as required to obtain the necessary camber and caster.

AERO / BODY

• Adjustable and GT style wings are allowed but must be 600sqin or less (Updated 3/12/24)

• May be no more than 3” above roofline, excluding stands and endplates

• Hatchbacks and wagons are excluded from this rule.

• Aftermarket bumpers, lips, spoilers, adjustable duckbills, and non-adjustable single-piece wings allowed. 

• Splitter must be 2D, tunnels or diffusers are not allowed.

• Splitter may not protrude more than 3” when viewed from above the bumper.

• Splitters may not be used with non-oem bumpers

• Aftermarket rear bumpers are allowed, rear bumpers may be trimmed as long as they cover the impact bar and frame rails.

• Diffusers are prohibited (cosmetic rear bumper “lip” style is allowed)

• Hoods, hardtops, fenders, flares, vents and widebody panels are open.

• Doors must remain OEM

• Glass may be replaced with Lexan, polycarbonate, or other alternative materials.

• Flat bottom floors are prohibited.

 INTERIOR / SAFETY/ MISC

• Weight reduction allowed. 

• Anything behind the driver’s seat, carpet, headliner, and radio/speakers may be fully removed. Passenger seat is required.

• OE Dashboard is required, airbags may be removed.

• Door panels may be replaced by alternate materials but are required unless door bars are present. 

• Side windows may NOT be removed unless a cage with door bars is present.

• Vehicles must have headlights and taillights. 

• Headlights and taillights must be in working order.

TUNER

ENGINE / DRIVETRAIN 

• Engines allowed: 

• Naturally Aspirated: 3.8L Max

• Forced Induction: 2.5L Max

• Rotary Engines: 2 Rotor F/I Max. NA is unrestricted

• Single Motor (EV) allowed

• Fuel

• NA: 100oct or E85 Max

• F/I: 93oct Max no E85

• Fuel additives that increase octane levels are not allowed

• Nitrous is prohibited. 

• Dogbox and sequential transmissions are not allowed. 

• Drivetrain conversions are not permitted

• Turbos are limited to 68mm compressor and 58mm turbine.

• Superchargers are unrestricted.

SUSPENSION / TIRES 

• Maximum tire width: 275 (average if staggered)

• Tires must have a UTQG Rating of 100 or higher. 

• SuperCar 3R, Cup 2 R, and Vitour tires are prohibited. (Updated 3/12/24)

• Toyo RR is permitted

• Maximum 2-way Shocks/Struts are allowed. 

• Active suspension is prohibited unless OEM. (Updated 3/12/24)

• Aftermarket suspension components are permitted and do not have to retain OEM geometry. (Updated 3/12/24)

  • Components must be readily available and not 1 off custom components. (Updated 3/12/24)

CHASSIS

• No tube-frame, open wheel, or kit car vehicles allowed.

• Cars must keep stock chassis with no modifications unless to add chassis bracing ie: e46 weld-on chassis bracing. No aftermarket tubular or carbon chassis components are allowed.

• Subframes are open. (Updated 3/12/24)

• The shock tower may be modified only to allow the installation of camber/caster plates and only as required to obtain the necessary camber and caster.

AERO / BODY

• Adjustable and GT style wings are allowed.

• May be no wider than car, excluding mirrors

• May be no more than 5” above roofline, excluding stands and endplates

• Hatchbacks and wagons are excluded from this rule.

• Aftermarket bumpers, lips, spoilers, adjustable duckbills are allowed.

• Aftermarket lips and Non-OEM front bumpers may not have a built-in lip that protrudes more than 5” when viewed from above.

• Up to 2 canards per bumper are allowed, no larger than 60 sq in each.

• Splitters are allowed.

• May not protrude more than 5” when viewed from above.

• Splitter can have only a pair of tunnels or diffusers.

• Splitter may only extend until the centerline of the front wheels.

• Splitter endplates and tire spats are allowed.

• Aftermarket rear bumpers are allowed, rear bumpers may be trimmed as long as they cover the impact bar and frame rails.

• Diffusers are prohibited (cosmetic rear bumper “lip” style is allowed)

• Hoods, hardtops, fenders, flares, vents and widebody panels are open.

• Doors must remain OEM

• Glass may be replaced with Lexan, polycarbonate, or other alternative materials.

• Flat bottom floors are prohibited.

 INTERIOR / SAFETY/ MISC

• Weight reduction allowed. 

• Anything behind the driver’s seat, carpet, headliner, and radio/speakers may be fully removed. Passenger seat is required.

• OE Dashboard is required, airbags may be removed.

• Door panels may be replaced by alternate materials but are required unless door bars are present. 

• Side windows may NOT be removed unless a cage with door bars is present.

• Vehicles must have headlights and taillights. 

• Headlights and taillights must be in working order.

GT

ENGINE / DRIVETRAIN 

• Engines allowed: 

• Naturally Aspirated: 6.3L Max

• Forced Induction: 3.2L Max

• Rotary Engines: No restriction 

• Dual Motor (EV) allowed

• Fuel

• NA = No restrictions

• FI 2.9L Max = Unrestricted

• FI 3.0L+ = 93 oct max

• Nitrous is prohibited. 

• Dogbox and sequential transmissions are not allowed. 

• Drivetrain conversions are not permitted

• Turbos are unrestricted.

• Superchargers are unrestricted.

SUSPENSION / TIRES 

• Maximum tire width: 295 (average if staggered)

• Tires must have a UTQG Rating of 100 or higher. 

• SuperCar 3R, Cup 2 R, and Vitour tires are prohibited. (Updated 3/12/24)

• Toyo RR is permitted.

• Maximum 2-way Shocks/Struts are allowed. 

• Active suspension is prohibited unless OEM.

• Aftermarket suspension components are permitted as long as they retain OEM geometry pick-up points and roll centers.

•  Bushings, swaybars, end links, ball-joints, and tie rod ends are exempt from this rule

CHASSIS

• No tube-frame, open wheel, or kit car vehicles allowed.

• Cars must keep stock chassis with no modifications unless to add chassis bracing ie: e46 weld-on chassis bracing. No aftermarket tubular or carbon chassis components are allowed.

• No Aftermarket subframes are permitted.

• The shock tower may be modified only to allow the installation of camber/caster plates and only as required to obtain the necessary camber and caster.

AERO / BODY

• Adjustable and GT style wings are prohibited. (See image below)

• Aftermarket bumpers, lips, spoilers, adjustable duckbills, and non-adjustable single-piece wings allowed. 

• Non-OEM front bumpers may not have a built-in lip that protrudes more than 3” when viewed from above.

• Canards are prohibited.

• Splitters and aftermarket 3D undertrays are prohibited.

• Aftermarket rear bumpers are allowed, rear bumpers may be trimmed as long as they cover the impact bar and frame rails.

• Diffusers are prohibited (cosmetic rear bumper “lip” style is allowed)

• Hoods, hardtops, fenders, flares, vents and widebody panels are open.

• Doors must remain OEM material

• Glass may be replaced with Lexan, polycarbonate, or other alternative materials.

• Flat bottom floors are prohibited unless OEM equipped.

 INTERIOR / SAFETY/ MISC

• Weight reduction allowed. 

• Anything behind the driver’s seat, carpet, headliner, and radio/speakers may be fully removed. Passenger seat is required.

• OE Dashboard is required, airbags may be removed.

• Door panels may be replaced by alternate materials but are required unless door bars are present. 

• Side windows may NOT be removed unless a cage with door bars is present.

• Vehicles must have working taillights.

GT+

ENGINE / DRIVETRAIN 

• Engines allowed: 

• No restrictions

• Fuel

• No restrictions

• Nitrous is prohibited. 

• Dogbox and sequential transmissions are allowed. 

• Drivetrain conversions are permitted.

• Turbos are unrestricted.

• Superchargers are unrestricted.

SUSPENSION / TIRES 

• Maximum tire width: 305 (average if staggered)

• Tires must have a UTQG Rating of 100 or higher. 

• Cup 2 R, Toyo RR, SuperCar 3R, and Vitour P1 are permitted. (Updated 3/12/24)

• Active suspension is prohibited unless OEM.

• Aftermarket suspension components are permitted and do not have to retain OEM geometry. (Updated 3/12/24)

CHASSIS

• No tube-frame, open wheel, or kit car vehicles allowed.

• Cars must keep stock chassis with no modifications unless to add chassis bracing ie: e46 weld-on chassis bracing. No aftermarket tubular or carbon chassis components are allowed.

• Subframes are open.

• The shock tower may be modified, but geometry must remain OEM.

AERO / BODY

• Adjustable and GT style wings are allowed.

• May be no more than 8” above roofline or past rear bumper, excluding stands and endplates

• Hatchbacks and wagons are excluded from this rule.

• Aftermarket bumpers, lips, spoilers, adjustable duckbills are allowed.

• Aftermarket lips and Non-OEM front bumpers may not have a built-in lip that protrudes more than 8” when viewed from above.

• Up to 4 canards per bumper are allowed, no larger than 75 sq in each.

• Splitters are allowed.

• May not protrude more than 8” when viewed from above.

• Splitter may only extend until the firewall.

• Splitter tunnels, endplates and tire spats are allowed.

• Aftermarket rear bumpers are allowed, rear bumpers may be trimmed as long as they cover the impact bar and frame rails.

• Diffusers are open.

• Hoods, hardtops, doors, fenders, flares, vents and widebody panels are open.

• Glass may be replaced with Lexan, polycarbonate, or other alternative materials.

• Flat bottom floors are prohibited unless OEM equipped.

 INTERIOR / SAFETY/ MISC

• Side impact bars may NOT be removed unless a cage with door bars is present.

• Vehicles must have working taillights.

UNLIMITED

• CHASSIS / AERO

• No Restrictions

•  ENGINE / DRIVETRAIN

• No Restrictions

• SUSPENSION / TIRES

• No Restrictions

• INTERIOR / MISC

• Door impact bar may be removed if the cage has door bars.