T1: rule changes

competitive stature. The proof of legality or illegality shall lie upon any participant seeking action against
another participant.
B. COMPLIANCE
Electric Touring category cars shall be complaint to Federal Standards as specified for each automobile
9.1.9.X ELECTRIC TOURING (ET)
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listed on its Electric Touring specification line and as permitted by these rules.
A Shop/Service Manual (or its equivalent) for the specific make, model, and year of automobile is required
to be in the possession of each entrant. Manufacturer Shop/Service Manuals may come in the form of
printed material, CD, DVD, and/or Internet access to manufacturer website databases. It is the
responsibility of the competitor to provide the electronic device capable of accessing the data for
compliance verification. If Manufacturer Shop/Service Manuals are not available, then the competitor shall
have a copy of the official SCCA® Vehicle Technical Sheet (VTS) with them at each event and shall present it
for reference when officially requested. The manual is intended to aid SCCA® Technical Scrutineers in
identifying parts and the configuration of the automobile.
Additionally, a physical copy of the vehicle’s Emergency Services Guide must be in possession of each
entrant and readily accessible per Section 4 of the Supplemental Common Ruleset for Electric Vehicles
(SCREV)
C. AUTOMOBILE ELIGIBILITY
Only those cars listed on spec lines are eligible to compete. Cars classified will be approved by EPA and DOT
for sale in the United States (or by Environment Canada for sale in Canada) and shall be available to the
general public for purchase. Additions and deletions of automobiles shall be at the discretion of the SCCA®.
The vehicle identification number (VIN) shall correspond with the model automobile classified. At least
one VIN plate or stamping shall remain in place on the dashboard or chassis that corresponds with the
model automobile classified.
D. CLASSIFICATION
Classifications of automobiles eligible for competition will be reviewed on an annual basis and will be
effective as of January 1st.
Vehicles classified as Electric Touring 1 (ET1) must have a power-to-weight-ratio of greater than or equal
to 125W/kg. Vehicles classified as Electric Touring 2 (ET2) must have a power-to-weight-ratio of less than
125W/kg.
E. SAFETY ITEMS
The following represent the only safety items and modifications permitted and are required on
automobiles involved in Electric Touring competition, unless otherwise noted. Cars must comply with the
GCR and the SCREV as noted herein. The addition of safety items not specifically listed is prohibited. No
permitted safety component/modification shall additionally perform a prohibited function.
1. Roll cages shall be contained entirely within the driver/passenger compartment and must comply with GCR Section 9.4, Roll Cages for
GT and Production Based Cars
2. Installation of a fire system as specified in GCR Section 9.3, Fire System, and SCREV Section 4, Fire System. In the case of a conflict
between the GCR and the SCREV, the SCREV takes precedence.
3. The driver’s seat shall be replaced with a one-piece, bucket-type race seat per GCR Section 9.3, Seats. Standard seat tracks/brackets
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may be modified, reinforced, and/or removed to facilitate replacement mountings provided they perform no other function.
4. Installation of a safety harness system as specified in GCR Section 9.3, Driver’s Restraint System.
5. All cars shall run with both front door windows fully open (down), if equipped, and shall have a driver’s side window safety net per GCR
Section 9.3, Window Safety Nets. Window safety nets shall be mounted in such a manner to provide protection in the
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event the driver’s door opens. Rear windows shall be run in the closed (up) position.
6. Tractive System Active Light(s) must be installed as defined in SCREV Section 4 for GT and Production Based Vehicles.
7. Rain and Brake Lights must operate as specified in GCR Section 9.3, Lights
8. Vehicle must be marked per SCREV Section 4, Vehicle Markings.
9. Passive restraint systems shall be deactivated.
10. Air bag systems shall be disarmed and may optionally be removed. If so equipped, the rolling door lock mechanism may optionally
be deactivated by unplugging the components
11. (OPTIONAL) Steering lock mechanisms may be removed or disabled.
12. (OPTIONAL) Inside net running between the main roll hoop and the dash may be installed as specified in GCR Section 9.3, Inside Net.
F. VEHICLE PREPARATION
The following represents the only items authorized in the preparation of a vehicle for Electric Touring
competition other than safety items as required in Section 9.1.X.E Safety Items. Modifications shall not be
made unless specifically authorized herein. No permitted component/modification shall additionally
perform a prohibited function
1. ELECTRICAL
a. All components of the Tractive System (as defined in SCREV 5.0) shall be OEM and shall not be modified. This includes electric
motors, charging systems, DC/DC converters, RESS/Battery Packs, wiring harnesses, etc.
b. Auxiliary Battery (as defined in SCREV 5.0) may be replaced with those of alternate manufacture provided they are of similar
Ampere-hour (Ah) capacity and weight. Battery must remain in stock location. Additional hold-down brackets are allowed.
2. SOFTWARE AND DATA ACQUISITION SYSTEMS
a. All software and firmware builds installed on the vehicle shall be released by the OEM for the vehicle’s specification line. The
software and firmware versions may be updated or backdated on the vehicle as long as it was offered by the OEM to the general
public for the vehicle’s specification line.
b. The OEM source code, logic, or executable for the software or firmware build shall not be modified in any way.
c. Adjustment to vehicle performance parameters (such as drive mode, throttle map, maximum motor output power, maximum
regenerative braking level, etc.) is permitted only if the OEM software or firmware allows for the adjustment through the
vehicle’s OEM user interface (touchscreen, electromechanical selector, push button, etc.). Adjustment to vehicle performance
parameters through external test equipment, third-party devices, or through the OBD2 port is prohibited.
d. Use of secondary or “piggy-back” controllers are prohibited.
e. Devices that perform no function other than to relay lap times to the driver (Longacre Hot Lap, Intercomp Lap Timer, etc.) are
permitted, including the required mounting hardware and connections for the relay lap timer to function.
f. Stand-alone data acquisition systems (GPS or accelerometer-based) are allowed. One connection from the OBD2 port, or vehicle
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CAN bus, to the stand-alone data acquisition system is permitted. The stand-alone acquisition system must be “read-only” and must
not modify any parameter on the databus in any way. Any data-acquisition sensor added to the vehicle is prohibited from
interfacing with the vehicle’s software/firmware and the data acquisition system must not tie into the vehicle electronics in any
other manner beyond this allowance.
g. An official SCCA data acquisition device may be required during practice, qualification, or a race. The data acquisition device may
require an electrical interface with the vehicle and may be used for compliance purposes (e.g. software and firmware versions,
allowable adjustments to performance parameters, etc.). It is the responsibility of the competitor to
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provide any adapter cable(s) required to electrically interface between the vehicle’s data acquisition
output and the official SCCA data acquisition device. Specifications on any official SCCA data
acquisition device, including electrical interfaces, will be provided in the event’s supplemental
regulations.
3. CHASSIS AND BODYWORK
a. Appearance shall be neat and clean. Automobiles that are dirty externally or in the passenger compartments, that show bodywork
damage, that are partially or totally in primer, or that do not bear the prescribed identification marks shall not be approved for
competition. Vehicles may be painted any color(s).
b. The minimum ride height is six (6) inches, to be measured without driver at the lowest point of the rocker panels, but not to
include welded seams or fasteners. A vehicle having a ride height listed in the spec line must conform to the spec line.
c. Sunroofs, Targa tops, and T-tops are only permitted if installed by the manufacturer of the vehicle. If installed, they must be
retained in the closed position and securely bolted in place unless the operating rails adequately secure the panel. Glass panels are
permitted. Glass panels may be replaced with a panel made of the same material and thickness as the roof of the car. Replacement
panels must have the same contour as the glass panel it is replacing. Components (motors, cables, rails) may be removed provided
the panel is securely retained.
d. The vehicle body, when viewed from any axis or measured from any cross-section, shall not be modified from the original OEM
shape. This includes fenders and wheel openings which shall remain unmodified.
e. All mud flaps shall be removed. OEM rigid aerodynamic splats are acceptable.
f. Optional Hood Pins may be added to supplement the original hood latch system. All parts of the original hood latch system
must remain in the car.
4. SUSPENSION AND STEERING
a. Vehicle must use the specific shock and/or strut as listed in the specification line. Modification to suspension components and/or
pick-up points is prohibited.
b. A maximum of 3.5 degrees negative camber is allowed on front and rear suspensions. Strut suspensions may adjust camber using
eccentric bolts (crash bolts) at the strut-to-spindle, slotted strut mounting holes at the spindle, and/or by use of any slotted camber
only adjuster plate at the top of the strut mounting plate. If upper strut slotted plates are used, they shall be located on existing
chassis structure, utilizing the manufacturer’s original bolt holes and may not serve as reinforcement for that structure.
Modifications to the top of the strut tower may be made to allow for camber adjustment only. On other forms of suspension,
camber adjustment may be achieved using shims and/or eccentric bolts (crash bolts).
c. Front and rear toe settings are free. Rear toe adjustments may be achieved using shims.
d. Aftermarket steering wheels, and their required mounting modifications, are permitted. Removable steering wheels are
permitted.
5. COOLING SYSTEMS
a. Air-Conditioner Systems shall not be removed or modified. This includes any air-conditioning system used to cool the passenger
compartment and/or the RESS/Battery Packs
b. Coolant fluids must be OEM, but aftermarket radiators and coolant loop hoses are permitted. A radiator screen of minimum one-
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fourth inch (1/4”) mesh may be added in front of the radiator and contained within the bodywork. The rake angle of radiator(s) is
unrestricted.
c. Dry ice, (a.k.a. solid carbon dioxide), may be used to cool the cooling loop radiators except for when the vehicle is in false grid, in pit
lane, in impound, in motion, or inside any building (including garages). Dry-ice must be in a mesh basket or perforated container
when cooling the radiators (loose dry-ice is prohibited). Electric fans may be used to force air over the dry-ice and onto the
radiators. Dry ice, when not in use, shall be stored in an insulated and vented container outside of any buildings (including garages).
Personal protective equipment, such as safety glasses and cryogenic gloves, should be worn when handling or transporting dry ice.
Liquid cryogens, such as Liquid Nitrogen (LN2) are prohibited.
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6. BRAKES
a. Standard replacement brake rotors/drums may be obtained from sources other than the original manufacturer provided they are
the exact equivalent.
b. Any brake pad or lining may be used. Metal or plastic dust shields may be removed or modified by removing material.
c. Brake ducts are permitted, but they must serve no other purpose. Duct openings may be created by the removal of the fog lights.
Alternatively, duct openings may be created by opening two sections up to 14.5 square inches each of stock false grills originally
located in the front fascia, or radiator shroud, but in this case fog lamps may be removed. Fog light holes must be completely
covered. The stock headlamp location is not permitted for brake ducting.
d. Brake fluid may be substituted with other fluids equivalent (or higher) to manufacturer’s specification
e. Original brake and clutch hoses may be replaced by braided stainless steel brake lines
f. Regenerative braking is permitted but shall not exceed the maximum level permitted by the OEM released BMS software.
7. WHEELS/TIRES
a. All wheels shall be of the diameter and rim width combination as originally offered by the OEM (including optional
equipment) for the year(s), make, model and trim level(s) of the car as listed on the specification line.
b. All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must be the same diameter.
Knockoff/quick change type wheels are prohibited.
c. Aftermarket wheel studs and/or wheel bolts are allowed. Wheel bolts may be replaced with studs and nuts. Wheel spacers are
allowed; the same thickness spacer must be used on all four corners.
d. Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude
beyond the fender opening when viewed from the top perpendicular to the ground.
e. All tires must be of a size (width and aspect ratio) as originally offered by the OEM (including optional equipment) for the wheel
diameter and rim width installed on the vehicle.
f. Tires must conform to GCR Section 9.3 Tires.
g. Spare Wheels and Tires must be removed from the vehicle.
8. INTERIOR
a. Interiors may be removed including seats, seat brackets, carpet, carpet padding, rear door panels, OEM seat belts, interior trim,
and headliners. Front door window glass, front window operating mechanism, inner door trim panel, armrest, map pockets, wiring
harnesses for front door locks, power mirrors, seat wiring, etc., and inside front door latch/lock operating mechanism may be
removed. Heater cores, and hoses, must remain except for duct work under seats. Duct work behind the dash may be removed to
allow for roll cage installation.
b. Trunk mats, covers and/or carpeting shall be removed.
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c. Hubcaps, wheel trim rings, jack, and tools shall be removed.
d. Hatchback “privacy covers” must be completely removed.
e. Interior mirror(s) may be replaced with a multi-panel type mirror but shall not extend beyond the confines of the interior.
f. Stand-alone radios may be removed. Radios integrated into the OEM infotainment system shall not be removed.
g. Audio speakers may be removed.
h. Two-way communication radios may be installed.
9. WEIGHT
a. The minimum weight as listed on the spec line is with driver. If a cool suit system is utilized, the cool suit system shall be weighed with
the car as it came off the track.
b. Ballast may be added to meet the listed minimum weight.
c. The ballast shall be in segments no lighter than ten (10) pounds and no heavier than fifty (50) pounds.
d. Each segment shall be fastened with a minimum of two (2) one-half inch (1/2”) bolts and positive lock nuts of SAE Grade 5/Metric 8.8 or
better, and shall utilize large diameter, load distributing washers.
10. GENERAL
a. All adjustments shall be at the manufacturer’s specification and/or within the manufacturer’s specified tolerances unless they are
specifically allowed in the GCR (example: camber angle).
b. “Special performance” specifications from the manufacturer that go beyond those listed on a specification line for a car are prohibited. Any
manufacturer determined to be supplying false specifications to competitors or to SCCA will be advised that the specifications shall be
withdrawn and/or the eligibility of the car(s) involved will be terminated. The SCCA® Club Racing Board (CRB) is authorized to implement
these terminations on an immediate basis without Board of Directors (BoD) approval. In the case of service circulars, recalls, etc., the
burden of proof of validity will be upon the competitor.
c. Towing eyes per GCR Section 9.3, Towing Eyes, shall be fitted.
d. Lubricants may be substituted with any lubricant. Additives are unrestricted.
e. Removal of OEM Low Speed Audible Alert systems is prohibited.
f. Cosmetic plastic motor covers may be removed.

factory-based models.
Philosophy- The T1 philosophy is to allow balanced competition between racers that approach the class from different scenarios.
1) Some will opt to race a production-based vehicle with safety equipment and common and widely available performance
modifications 2) Due to the increasing complexity of high-performance cars, late model T1-capable cars are primarily being built
by manufacturer-backed programs. Drivers that opt to race these cars will be required to comply with a specific homologation or
spec sheet as defined in their spec line. Examples are GT4 cars or the track-ready Mustang FP350S. 3) Some will choose to
campaign cars built for a different series. An example is the inclusion of Spec Corvettes.
T1 Car Eligibility:
Cars are eligible for the class when the car or the chassis appears on a specification line and with the specific allowances
permitted. New models and allowances will be considered after being properly requested through the CRB’s letter log system.
New model submissions must include Vehicle Technical Specifications (VTS) sheets. Allowances that are permitted are not
mandatory and a vehicle may race without any given positive allowance. T2 cars may race in the T1 category if they meet
minimum safety requirements. Minimum weight for any new T1 classification is 3000 lbs.
The T1 rules are broken into 2 categories: 1) Cars that were once showroom models, which were converted to race cars
conforming to the following category rules, and 2) Cars that were built to meet the homologations of a different series or were
built by a factory as a track-ready car.
Category rules for showroom models begin in at “A. Bodywork” and continue to “N”. Allowed homologated cars must comply
with the second set of category rules found after the first set of spec lines and resume at “Q”.
Only cars listed in the following spec lines are eligible to compete in SCCA Touring 1 races. Not every spec line is automatically
eligible to compete in the National Championship Runoffs. All new spec lines will be required to compete in at least 3 Super Tour
events prior to being able to enter the Runoffs. This provides the club the chance to evaluate new spec lines before they enter.
Old or unused spec lines will be removed from these rules through the following process: If a spec line or engine option is slated
to be removed, it will be marked with “Expiring” and an effective date in the “Spec Line Number” column. If you compete under
one of these spec lines, or intend to soon, please submit a request through the SCCA’s letter system. If a spec line or engine
option was removed, you may request to re-class it.
A. Bodywork
1. Hoods, trunk lids, and front fenders may be replaced with panels of any type material, provided that the panel
maintains the OEM profiles. For the sole purpose of tire fitment, wheel arches may be flared up to 3” and must maintain
the OEM profile. The hood may have heat exhaust vents installed in it. Hood inlets (scoops) are not allowed. The vents
shall not expose the mechanical components of the car when looking down from above. The permitted transmission and
differential coolers may vent through rear license plate frame. There shall be a screen, painted the same color as the
surrounding bodywork, covering the vent opening. Any OEM non-functional, decorative vents/ducts may be made to be
functional provided the exterior body appearance is not modified.
2. It is permitted to roll under or flatten any interior lip on the wheel opening for tire clearance. Cars with
plastic/composite fenders may remove any interior wheel opening lip, but the resulting material edge shall be no thinner
than the basic fender material thickness. Non-metallic inner fender liners may be removed.
3. Standard body appearance must be strictly maintained. Standard body appearance includes the OEM grille and
badge.
4. Body and frame seams and joints may be welded. The OEM radiator supports may be replaced or reinforced to
make repairs easier. The radiator supports shall not reinforce the rest of the chassis or diminish the OEM crush zones.
Tubular/removable front clips are not permitted.
5. Bumper brackets may be modified, but bumpers must remain in OEM locations.
6. Non-essential body items and trim may be removed including attaching brackets and supporting structure. Any
holes in bodywork exposed by the removal of these items shall be covered or filled.
7. All of the vehicle’s doors must be able to be opened from both inside and outside the vehicle. Latches and hinges
for the doors may be modified, but must remain in working order. Electric door latches may be removed and replaced
with mechanical linkage. Mechanical door latch location must be marked to be visible to workers. Aftermarket latches
and hinges may be used but shall not protrude beyond outer surface of bodywork. The stock side impact beams may be
removed when NASCAR style door bars are installed.
8. Hood and trunk pins, clips, or positive action external latches are permitted. Stock hood and trunk latches and
hinges may be disabled or removed; if so, a positive action external fastening method shall be used. Engine compartment
insulation may be removed.
9. Openings in the bodywork may be temporarily covered, wholly or partially, with tape for the purpose of
regulating airflow. Bodywork openings may be closed off using close-out panels mounted behind body openings.
Bodywork seams may not be taped except to temporarily secure it after contact.
10. All bodywork and windows shall be sufficiently rigid, adequately supported and properly secured such that it
does not noticeably flutter, move, or deform while vehicle is in motion.
11. Aftermarket OEM style hardtops are allowed.
B. Aerodynamic Devices
1. Front Splitter
a) A front splitter that is a flat, single-plane may be added. The splitter shall have no vertical
deviations. The permitted splitter may close out the underbody from the leading edge of the approved
bodywork, back to the centerline of the front axle. The splitter may be mounted to the front fascia via a
vertical intermediate mounting surface. If the vertical mounting surface overlaps the front fascia, it may
not overlap more than 2.0 inches. Additionally, a maximum of 4 rods, or cables, may be used to support
the front, and/or sides, of the splitter. No other material(s) may be used external to the body to support
the splitter. A single-plane vertical close-out panel(s) may be used to bridge the gap between the front
fascia and the splitter. Splitter designs may incorporate openings for brake ducts provided it does not
affect the standard body appearance.
b) The minimum ride height of front splitters and air dams is 3.0 inches.
c) The front splitter must not extend more than 2.0 inches past the original or approved bodywork as
viewed from above for the entire profile of the splitter.
d) The splitter shall not extend laterally any further than the widest point of the outside sidewall of the
front tires with the wheels pointed straight ahead. The splitter may not extend more than 2.0 inches beyond the
bodywork, regardless of where the outside edges of the front tires are.
e) The splitter may have vertical deviations, fences, etc., only if they are part of the production body- work
for street use.
2. Rear Wing
a) The wing shall be mounted to the trunk/deck lid or bumper frame with 2 mounting brackets. Each
mounting bracket shall attach to the wing at a point that is at least 2.0 inches inboard of endplates. The wing,
and the portion of the mounting brackets located externally to the trunk/deck lid, may only be rein- forced by a
diagonal strut having no aerodynamic effect, and/or by affixing the external parts of the brackets to internal
parts of the brackets within the trunk/cargo area. The internal parts of the brackets may protrude through the
trunk/deck lid to allow the two parts of each bracket to be fastened together.
b) Factory wings and spoilers are permitted, but must be removed if an approved wing is installed.
c) Wings shall be a single element and single plane with a maximum chord length of 12.00 inches, including
any Gurney flap. (except as allowed in 9.1.9.1.B.2.h).
d) The entire wing assembly may be no wider than the widest part of the car, not including fender
flares/lips and mirrors, or a maximum width of 72.0 inches, whichever is the lesser.
e) The entire rear wing assembly, including the end plates and any Gurney flap, shall be mounted level with,
or below, the peak of the roof.
f) The trailing edge of the rear wing may be mounted no further rearward than the center of the rear- most
part of the approved bodywork unless otherwise noted on specific spec line.
g) Wing end plates must not exceed 144.0 square inches.
3. Any car not using a wing and/or splitter may subtract 150lb.
4. A close-out panel may be mounted behind the grille.
5. OEM side skirts may be used if they were available on the car from the dealer provided they meet the minimum
ride height rule. Aftermarket side skirts may be used provided they meet the minimum ride height rule, have no
openings/ducts in them other than for jacking insert(s), are no wider than the approved fascias, do not extend any higher
than the bottom of the door and do not reinforce the chassis.
6. Canards or dive planes are not permitted unless part of the OEM bodywork or permitted on spec line.
C. Interior
1. The following items may be installed: Safety equipment/structures, seat, controls necessary for driving,
instrumentation, electronic equipment, radio, camera, battery, driver cooling system, driver ventilation system,
replacement door panels/ interior trim, anti-sway bar controls (not within reach of driver). None of the above items may
hinder driver exit from the car.
2. The driver’s seat shall be located in the same lateral location as the OEM seat, unless otherwise allowed on a
car’s spec line. The transmission tunnel may be modified for the purpose of installing a competition driver seat. The floor
pan must remain in its original position, but may be modified 1” to accommodate driver's height.
3. All interior trim may be removed excluding the dash. Original instruments/gauges may be replaced, or
supplemented, with additional monitoring gauges. Accessories, lights and switches may be added or removed. Box-type
extensions from the dash pad may be used to mount switches and controls, in the areas where the OEM insert panels
were mounted, so that they more easily accessible to the driver. Audio and video systems may be removed. Alternative
(i.e. carbon or fiberglass) OEM style and Configuration dashboards may be used with a 25 pound penalty.
4. Vertical bulkheads, and enclosures, within the cockpit shall not be any higher than the bottom of the side
windows. No bulkheads shall cover the rear foot wells. This rule may be superseded in the spec line.
5. Dash pad modification – It is permitted to modify the dash pad in order to run the roll cage tubes through the
dash area as long as the dash pad is modified only enough for roll cage fitment. If necessary, the dash pad may be parted
to ease installation around roll cage. Any such parting shall be done in such a way as to minimize the appearance that
they have been separated once pieces of dash pad are installed.
D. Chassis
1. All cars shall have the OEM rear package shelf and/or rear seat back support structure installed if applicable. As
an alternative, a metallic close out panel may be installed that simulates the rear package shelf and/or the rear seat back
support structure if applicable. If a close out panel is used to clean up the appearance of the rear package shelf and/or
rear material is free.
2. Cables, wiring and fluid lines in the engine compartment and cabin interior may be replaced, rerouted, and/or
protected.
3. Cars that have driveshafts shall have two 360-degree loops of sufficient strength located as close as possible to
the front and rear universal joints to prevent the driveshaft from dropping in case of failure of either universal joint. Floor
materials, torque tubes and cross members may also be utilized to provide this protection.
4. It is permitted to attach one or more plates, or pads, under the car to provide for jacking of the car, provided they
serve no other purpose. It is prohibited to install any kind of device, which protrudes from the rocker panel or side of the
car. However, tubes may be attached to the roll cage or chassis and extend to the inner surface of the rocker panel or
bodywork to act as a receptacle for a jacking fixture. Air jacks are permitted, but no air source may be carried on board.
Jock points are considered when measuring ride height.
5. Ride height will be measured without driver at the lowest point of the rocker panel, not including the pinch weld.
Minimum ride height is 3.5 inches.
6. The OEM firewall between the cockpit and engine compartment shall be intact to prevent the passage of flames
from the engine compartment to the cockpit. Any holes in the firewall must be of the minimum size for the passage of
controls and wires, and must be completely sealed.
7. Both front windows, driver and passenger, shall be down (preferably removed) whenever the vehicle is on track.
The OEM window opening on the front doors shall not be filled in with any material, other than the material required to
mount a NACA-duct for driver cooling. The area closed off to mount the NACA- duct shall not exceed 50 square-inches.
Enough open area for the driver to exit in an emergency shall remain open at all times.
8. All vehicles must use a stock, OEM equivalent, safety glass windshield, or 6 mm minimum thickness Lexan
replacement, mounted in the stock location, at the stock angle and maintaining the stock profile.
9. Windshield clips, per GCR section 9.3 Windshield Clips/Rear Window Straps, are permitted and recommended.
Rear window clips are permitted.
10. Side windows, not including the front door windows, and rear windows may be replaced by clear Lexan-type
plastic material having a minimum thickness of 0.125 inch, but must retain the same shape, size, and location as the
original glass. NACA-ducts may be mounted in the side windows. The rear window must be secured by 2 additional straps
1.0 inch wide by 0.0625 inch thick minimum, bolted or riveted to the body at both the top and bottom of the rear
window. If a Lexan rear window is mounted with multiple, evenly spaced screws around each side of its perimeter, safety
straps are not required. If a DOT spec glass rear window is used in conjunction with the OEM method of mounting, safety
straps are recommended, but not required.
11. Windows may be mounted and sealed with silicone. Any silicone used to bridge the gap between the perimeter of
the window and the chassis shall be neat in appearance and uniform in thickness. Tape may only be used to seal the
windows during wet track sessions for the purpose of reducing the amount of water entering the cockpit.
12. OEM side window framework shall be intact.
13. Acrylic or glass removable/moveable roof panels may be replaced with the same material as the surrounding
roof. All brackets, mounts, and moldings must be removed. Fabric tops are not permitted and shall be removed along
with all associated hardware. It may be replaced with an OEM hardtop if one is available.
14. Unused mounting tabs and brackets that are non-structural may be removed.
15. The OEM “rain gutter/tray” at the base of the windshield shall be intact and in the OEM location.
16. The floor pan may be modified to provide clearance for the exhaust system and allowed alternate trans-
mission/transaxle.
17. Inner fender panels may be modified or replaced.
18. Convertible model cars may compete with a hardtop or as an open car.
19. Fasteners are free. Titanium fasteners are prohibited. Fasteners may be replaced with adhesives.
20. Rounded coverings may be used at the rear of the front window openings to bridge gap between the leading
edge of b-pillar and inner edge of main roll hoop. The material and design of these coverings is free, but shall be neat in
appearance and securely fastened.
21. A third (3rd) tube on each side may extend through the firewall to the chassis in the engine compartment. These
tubes shall not extend forward of the shock towers.
22. An underbody close-out panel(s) may be used in the area behind the rear axle. These panels shall not alter the
external appearance of the car when looking from the rear and sides of the car (i.e. we want to have to lay on the ground
to see them). If the production car uses underbody trim pieces, the OEM trim pieces may be removed or replaced, but any
close-out panel(s) used may not visually hide any more of the mechanical components, when looking from the rear and
sides of the car, than the OEM trim pieces do. The close-out panels shall not completely bridge the gap between the rear
floor pan area and the rear axle centerline. On rear engine cars, any close-out panels shall not extend any further
forward than the rear axle centerline. Cars with a fuel cell, engine, etc. that extend down into external visual range shall
fit the close-out panel(s) around the component in such a way that it does not alter the external appearance of the car.
23. Chassis bushing material is not restricted
E. Engine
1. Engines may be used if they are shown as an engine option on the spec line. Engine options will be considered if
the manufacturer of the vehicle and engine are the same (e.g., an Acura engine installed into a Honda car) and was
available in a car delivered in North America. Engines from vehicles not available in a car delivered in North America may
be considered and approved
on a case-by-case basis. For an engine to be considered, a member must submit to the CRB a Vehicle Technical
Specifications (VTS) sheet with all engine parameters filled out and all supporting documentation. If approved, all
allowances will be noted on the proper spec line.
2. OEM Engine option- Some spec lines are offered the option to utilize OEM engine specifications. This option is
indicated in the “Maximum Displ.” Column of the spec lines. When using this option, it is permitted take advantage of
the durability allowances listed below, including valves, pistons and rods. These parts must be greater than or equal
OEM weight, and must meet the specifications set forth in the factory service manual. OEM engines may use a dry sump
system. The use of an alternate oil pan and pickup tube is allowed.
3. The crankshaft shall be a stock OEM part or an aftermarket part as long as it is of identical dimensions, material,
and within 3% of the mass of the OEM part for the specific engine. The crankshaft may be balanced. The maximum
weight reduction allowance for balancing of the crankshaft is 0.5 lbs. The maximum weight reduction allowance for the
balancing of the reciprocating assembly is 15 grams.
4. Blocks may be sleeved to repair cylinder walls. Engines may be bored to a maximum of .040 inch over standard
bore size.
5. Rocker arm, lifter, follower, pushrod, keeper, retainer, guide, and seat materials are free; Titanium is not
permitted, except for retainers or OEM parts. The head may be machined to fit valve train components. Rocker arm ratio
must meet OEM specs.
6. To increase the compression ratio, the bottom of the head may be machined.
7. Alternate pistons are permitted and/or the pistons may be machined. Maximum compression ratio is 12:1 unless
noted on the spec line. Must use SCCA approved fuel.
8. Alternate connecting rods are permitted given they are within 3% of the OEM weight or greater. Rods must be
ferrous
9. Valves may be replaced with Performance alternatives provided; 1) that the weight of the replacement is equal
to or greater than OE. 2) they are the same size and profile as OE. Valve springs may be replaced with aftermarket
alternatives provided they are the same configuration and size as OE +/-.015”). Valve lift is limited to .600 inches. OEM
engines must retain OEM valve lift and duration.
10. Performance alternate camshafts are allowed. Camshaft timing is free.
11. Cars produced with an electronic throttle body may use the OEM electronic throttle body. The OEM electronic
throttle body may be converted to manual actuation and the actuation cam on a manual throttle body may be changed
to alter the opening/closing rate of the butterfly. Alternately actuated throttle bodies may be considered on a case-by-
case basis.
12. The ignition system is unrestricted.
13. Aftermarket and performance alternative ECU, wiring, and transmission controls are permitted. Engine
calibration (spark and fuel) is free.
14. Performance Alternative TCS is allowed. Reprogramming of OEM TCS systems is permitted.
15. Fuel injectors and fuel rails must maintain the original number and mounting locations, but are otherwise free.
Fuel pumps and fuel filters are free in type, size and number.
16. The location and type of the fuel pressure regulators are free provided they are mounted within the engine
compartment or the OEM location.
17. Vents, breathers, and oil filters may be added, or substituted. All emission control devices may be removed and
the resulting holes plugged.
18. Replacement gaskets and seals are free, including head gaskets. Replacement gaskets and seals must be made
out of material(s) designed to seal the parts of an engine. Replacement gaskets and seals may not perform any other
functions. Head gaskets may be used to adjust compression ratio.
19. The intake manifold on piston engines may be port matched to the head(s), provided no material is removed
further than one inch in from the manifold to head mounting surface(s).
20. Variable cam timing (VTEC, VANOS, etc.) and variable length intake manifolds may be partially, or wholly,
disabled. Variable cam timing systems that use multiple cam lobes for each valve(s) may remove lobes from the
camshaft(s) that are not being used.
21. Cars utilizing forced induction may not have a boost controller within reach of the driver. A car must enter pit
lane to have the boost level changed by the crew if necessary. Competitors must be prepared to demonstrate the boost
adjustment process to officials.
22. All cars shall use the installed engine’s stock air throttling devices (e.g., throttle body, carburetor) and intake
manifold, unless noted otherwise. Components upstream of the throttling devices are free.
23. Unless otherwise noted, the following restrictions apply to turbochargers.
a) The inlet restrictor (if required) shall be positioned within six inches of the compressor wheel.
b) Turbochargers or superchargers that have been added to spec lines are grandfathered in the class, but
will not be considered going forward. Swapping of turbochargers between engine makes and models is
prohibited. Supercharged cars may be approved on a case-by-case basis. Alternate water pump, alternator,
crankshaft dampers, and/or power steering pulleys are unrestricted. Crankshaft pulley is unrestricted for all non-
supercharged engines; supercharged engines must use OEM crankshaft and supercharger pulleys unless
otherwise noted on spec line.
24) All cars may fit the approved carburetor and manifold. The approved manifold may be ported and polished, but
its design and configuration shall not be altered in any other way. The lowering of or boring of holes in the center divider
is prohibited. Removal or obliteration of the manifold part number is prohibited.
a. The approved carburetor shall be a maximum of 650 cfm and 4 barrels. The approved optional insulator
(Holley #108- 12), and manifold (Edlebrock Performer RPM #7101-General Motors / #7121-Ford/Mercury) shall
be fitted to cars.
b. Except as permitted in these rules, the carburetor shall not be modified in any way. Any carburetor jets,
accelerator pump, pump cam, and accelerator pump nozzles may be used. Power valves, metering blocks, and
floats may be altered or replaced. No venturi (including secondary or auxiliary) shall be modified in any way, but
they may be aligned. Idle holes may be drilled in the throttle plates (butterflies). Carburetors may be modified to
allow “four corner” idle adjustment.
c. The external throttle linkage to the carburetor may be modified or changed. Choke mechanisms, plates,
rods, and actuating cables, wires, or hoses may be removed. No removal or alteration of the carburetor air horn
is permitted.
d. All air entering the intake tract shall pass through the carburetor air inlet.
25. Cars may modify, or replace, motor and gearbox mounts provided that the engine and transmission are located
in the OEM location. This includes the use of “torque plates”. All engines will be mounted in the stock position unless
otherwise specified. Where an engine setback is allowed, the OEM firewall may be modified only enough to
accommodate the engine set back.
26. The following cars may set the engine rearward a maximum of 4.0 inches and may lower the engine a maximum
of 1.5 inches: **This rule is set to expire as of Jan 1, 2024.**
a. Cadillac CTS-V (04-07)
b. Pontiac GTO (04-08)
c. Ford Mustang (85-02) 4. GM F-Body (93-02)
27. The intake and exhaust ports on piston engines may be ported at a 3% weight penalty. The valve guide may be
machined as part of this porting.
28. Dry sump systems are allowed. The dry-sump system is limited to 5 stages. It shall consist of 1 pressure stage and
a maximum of 4 scavenge stages. If the OEM style pressure pump is used it shall count as the one permitted pressure
stage. There may be a maximum of 2 two-port scavenge stages, or a maximum of 4 single-port scavenge stages, or any
combination such that oil is not being scavenged from more than a maximum of 4 locations.
29. The oil pan and oil pickup may be baffled, modified, or replaced. The OEM oil pump may be modified, or replaced
with an OEM-style oil pump. It is strongly suggested that oil drain plugs be secured with safety wire.
D. Cooling
1. Water Cooling- Provided that the stock method of cooling is retained, the cooling system is free, including cooling
fans, but the water radiator must remain in the approximate OEM location. The mounting angle may be changed.
2. Engine Oil Cooling- Coolers for the engine oil are free in number, type and location.
3. Intake Air Cooling- Cars utilizing forced induction may install intercoolers. The number, type, and location of
intercoolers are free. Performance alternative Intercoolers are permitted.
4. Water Spray Systems- Water may not be sprayed on any component aside from the windshield.
5. Other Cooling systems; transmission oil, power steering, etc are not restricted
E. Fluid Piping & Fuel Tank
1. Fuel Cells/Tanks- The use of a fuel cell is required unless the stock fuel tank is located between the axle
centerlines and within the main chassis structure (i.e., frame rails, etc.). All fuel cells must comply with GCR 9.3. Proper
bracing to protect the fuel cell in the event of a rear-end crash is required. If a fuel cell is installed in the rear hatch/rear
trunk area, the OEM floor pan in that area may be replaced with metal in order to make it easier to mount the fuel cell
and close out the area around the fuel cell.
2. There must be a metal bulkhead completely separating the cockpit from the compartment containing the fuel
cell. This does not negate the requirement that the fuel cell bladder be contained in a metal container.
3. No line containing engine coolant may pass through the cockpit. No hydraulic fluid lines may have removable
connectors inside the cockpit.
4. All fluid hoses, lines, reservoirs, and tanks that are in the cockpit, or cargo area that is open to the driver, shall be
separated from the driver by rigid metallic and/or non-metallic enclosures and/or deflection shields to prevent fluid from
spraying on the driver in case of a leak. Magnesium is prohibited. Waterproof flexible wraps may also be used to prevent
fluid from spraying on the driver. The floor of these enclosures, or the area under the deflection shields, shall be designed
to prevent the accumulation of fluids.
5. No fuel cooling devices are permitted in the car.
F. Oil System
1. If the oil tank is located in the cockpit area, or a trunk area that is open to the driver, it must be separated from
the driver by a metal enclosure made up of .036 inch steel, or .059 inch aluminum. This is in addition to the 10mm thick
crushable structure that is required in section 9.1.4.I.2. The floor of the enclosure must be designed to prevent
accumulation of fluids.
2. Accusump-type systems may be used.
G. Exhaust System
1. Headers are allowed
2. Exhaust is free, as long as it exits behind the driver. The exhaust pipe may not protrude more than 3.0 inches at
the point where it exits the bodywork (rear) or 1.0 inches (side) when viewed from above. If the exhaust pipe(s) exit the
bodywork at the widest part of the body such that any extension of the exhaust pipe(s) beyond the body would make
pipe(s) the widest point, the exhaust pipe(s) must be trimmed flush (+/- 0.5 inch) with the bodywork at the point that
they exit the body. Minor body modifications are permitted to accommodate exhaust systems. Modifications shall serve
no other purpose. The underbody rocker panels may be modified for the installation of the exhaust system, but these
modifications may only serve to provide clearance for the exhaust system. The exhaust system must be adequately
isolated from the driver’s compartment.
3. If the exhaust system is routed in such a way that damage to it could cause hot exhaust to contact any part of
the fuel system, there shall be a metallic heat shield protecting the fuel system components. It is recommended that this
heat shield be located at least 3.0 inches away from the exhaust system, and there be at least 3.0 inches between the
heat shield and the fuel system components.
H. Electrical System- The electrical system is free provided that:
1. Use any commercially available battery. Batteries may be relocated.
2. For the purpose of cost reduction, standard headlights, headlight operating ancillaries, and parking light
assemblies may be removed and replaced with a plate of identical shape and size of the lens. Standard headlight
assemblies may be replaced with aftermarket units of equal dimension. Vehicles with pop-up and/or hidden headlights
may modify and/or remove the headlight assemblies as long as the headlight cover and any other external hardware are
properly secured in the stock closed location.
3. Fog/driving lights, parking lights and associated attaching hardware may be removed. The resulting openings
may be used to duct air, or may be filled/covered. No ducting may extend beyond the outer surface of the bodywork.
4. Each car must be fitted with at least one effective windshield wiper assembly, which must be in working order
throughout the event. Wiper blades, arms and associated hardware may be substituted freely. Other windshield wiper
assemblies may be removed.
5. Each car must have an effective defogging/demisting system that is capable of keeping the windshield clear
during wet sessions. Anti-fog films meet this requirement.
I. Drivetrain
1. Alternate differential housings are permitted from the same model of vehicle. Differential may be open, locked,
or of a limited-slip type. The internals of limited-slip type differentials may be modified to change the amount of slip
limiting. Differentials with external, or electric, adjustability are prohibited.
2. Driveshaft and half-shafts may be aftermarket, but shall be the OEM-type and use the same types of materials as
stock. Drive shafts may be replaced by one piece drive shafts, and conversely.
3. Alternate flywheels and clutches are permitted. Carbon flywheels and carbon clutches are not permitted.
Flywheel diameter must be the same as the OEM flywheel. Any 7 inch or larger clutch is permitted. Clutch and pressure
plate design is free.
4. Aftermarket sequential transmissions are permitted. Cars with aftermarket sequential shift transmissions shall
utilize a 1:1 ratio in top gear. Transmission location must be OEM. Maximum bell housing length is 10 inches. Cars that
don’t use an aftermarket sequential transmission may decrease their competition weight by 100 lbs.
5. Transmissions and ratios are free. Forward gears are limited to six speeds.
J. Suspension and Steering
1. All suspension members must be made from ferrous and/or aluminum materials. Chromium plating of
suspension members is prohibited.
2. Suspension springs are free. Coil-over units may be added to supplement or replace OEM springs. Attaching
points may be reinforced. It is permitted to use threaded spring seats for adjustability.
3. Shock absorbers and struts are free with a maximum or 4 adjusters per damper. Driver adjustable systems and
electronically controlled shocks are not permitted unless it is an OEM system running with OEM shocks and springs. If a
reservoir/adjustment canister is used, only one may be used per shock. The shocks at each individual wheel may not be
connected in any way. Adjustment canisters may not be within reach of the driver.
4. Anti-roll bars are free, and may be added, removed, or substituted. Driver adjustable anti-roll bars are not
permitted. Adjustment controls for anti-roll bars may be located within the cockpit, but must be out of the reach from the
driver’s seat. Adjustments to anti-roll bars during practice, qualifying and race must be done in pit lane. End/drop links
must use OEM mounting locations.
5. Spherical bearings are permitted on suspension components. Standard suspension bushings may be replaced
with solid or spherical bushings. Alternate control arms permitted.
6. Any anti-roll bar(s) and rear axle traction bar(s), rear axle panhard rod and watts linkage can be added or
substituted, provided their installation serves no other purpose. The mounts for these devices can be welded or bolted to
the car. These devices and their mounts cannot be located in the trunk or driver/ passenger compartment unless fitted as
stock. Rear axle traction bar(s) used to control axle housing rotation must be solid bar or tube.
7. When a car’s anti-roll bar also acts as a suspension locating device, the bar’s attachment points and pivot points
on the chassis and suspension control arms must remain in their stock locations.
8. Slotted plates may be added over original shock mounts on front and rear shock towers for camber/ caster
adjustment. Front and rear strut tower braces are permitted. Camber, toe and caster is unrestricted.
9. All steering components, with the exception of the steering wheel, column and tie-rods/toe-links, must be
original equipment supplied by the manufacturer. These parts may be strengthened provided the original part can still be
identified. Steering column locks may be removed or disabled. Steering column locks may be removed or disabled.
10. A collapsible steering column shall be used. Most recent OEM steering columns have at least 2 universal joints in
them that allow the steering column to collapse on impact. This type of design (with at least 1 universal joint) must also
be used in any steering column extension(s) that may be used to reach the driver’s competition seating position.
11. Power steering may be modified in any of the following ways:
a) disconnected
b) an OEM manual steering rack for that model may be fitted
c) an electric power steering pump may be fitted
d) an OEM electric-assisted steering rack may be used.
12. Cars with live axles may decrease their competition weight by 50 lbs. It is permitted to camber a live axle or use
a non-OEM option. The suspension configuration cannot be changed. Suspension pick up points cannot be changed
beyond allowances elsewhere in the T1 category rules.
13. Unmodified OEM pick up points are mandatory
14. The spindle and/or outer joint on the a-arm and/or strut may be moved to correct bump steer caused by
changing the vehicle ride height. These components are not limited to the 1.0 inch of movement that applies to the
suspension pick-up points located on the chassis.
15. Non-coil over suspensions are permitted to convert to coil over systems.
16. Suspension links are free provided; They use standard ball joint, bushing, or spherical attachments.
K. Brakes
1. Brake lines may be relocated, and rubber lines may be replaced with stainless steel braided brake lines. Hand
brake assemblies may be removed. Brake proportioning valves may be used provided that they are of the in line, pressure
limiting type. Non-pressurized brake fluid lines and master cylinders need not be metal, metal shielded, or bulkheaded.
Pressurized brake fluid lines must be metal, metal shielded, or bulkheaded.
2. Brake proportioning valves may be used provided that they are of the in line, pressure limiting type.
Brake pad friction material is free.
3. Hand brake assemblies may be removed. Backing plates and dust shields may be modified, ventilated, or
removed.
4. Brake duct inlets incorporated in the front spoiler as standard, or in light openings, other than head- lights, may
be used to duct air to the front brakes. Additionally, brake ducts may be fitted into the intermediate mounting surface of
a permitted splitter.
5. Wheel fans are not permitted.
6. When any allowed alternate calipers are used, calipers must be mounted in the same location and orientation as
the OEM calipers. OE caliper mounting tabs may be modified or removed to facilitate installation.
7. Alternative piston inserts are permitted.
8. Anti-Lock Braking Systems (ABS) are permitted. Performance alternative ABS systems or controllers (e.g. Bosch,
Tevis) are permitted. It is permitted to relocate performance alternative ABS systems within the engine compartment.
9. Rotors 1 or 2 piece ferrous rotors permitted. Brake rotor sizes are allowed as follows-
a) OE brake diameter permitted with no penalty
b) Max brake disc size 380mm with no penalty
c) >380mm brake disc permitted with a 50lb weight penalty
10. Calipers- The standard production calipers may be used. Performance alternative calipers are permitted- Max 6
piston 2 pad front caliper may be used. Max 4 piston 2 pad rear.
11. Original equipment master cylinders and pedals may be replaced.
12. Power assisted braking systems are permitted.
13. The balance of braking forces between the two wheels on an axle shall be equal and non-adjustable.
14. The balance of braking forces between the front and rear axles may only be adjusted by the driver through:
a) Direct intervention on the position of the center of the joint, on the linkage lever of the hydraulic pumps
of the front and rear circuits.
b) Direct intervention on a proportioning valve in which the intake pressure is adjusted through a pre-
loaded spring.
15. Any brake ducts are permitted, but they must serve no other purpose. Fender liners maybe modified solely for
routing and attachment of brake ducts. Duct intake openings must conform to “A-Bodywork”, and may be created by the
opening of 2 sections up to 14.5 square inches each in the front fascia. The stock headlamp location is not permitted for
brake ducting. Two alternative duct openings may be created by the removal of the fog lights or 2 sections up to 14.5
square inches each of stock false grills originally located in the front fascia.
L. Tires & Wheels
1. Tires must conform to GCR section 9.3. Tires.
2. Wheels / Hubs- The standard wheels may be replaced with direct, bolt-on racing/aftermarket wheels under the
following provisions:
a) Loose wheel spacers of any type are not recommended.
b) All cars must run the same size wheel on the same axle.
c) As viewed from above at the centerline of the wheel; the fender shall completely cover the “tread”
portion of the tire. Only the tire sidewalls may be visible.
d) The wheel material is free, but they must be constructed of metallic material(s). No modifications
(including grinding) are permitted on a vendor-supplied wheel.
e) Valve stems and caps are free.
3. Wheel Attachment
a) Center-locking type hubs and wheels may be used if vehicle is supplied with them from the manufacturer.
If vehicle is not supplied with center-locking type wheels they may be used in conjunction with an adapter that
bolts onto the OEM, or approved, hub.
b) If a single wheel nut is used, a safety spring must be in place on the nut whenever the car is running and
must be replaced after each wheel change. These springs must be painted Day-Glo red or orange. Alternatively,
another method of retaining the wheels may be used provided it has been approved by FIA.
4. Rear wheels may not exceed 19.0 inches in diameter and 13.0 inches in width. Front wheels may not exceed 19.0
inches in diameter and 11.0 inches in width.
M. Labeling-
1. These rules include many options that affect a vehicle’s competition weight.
a) The competition weight must be shown on both sides of the car. The competition weight is the sum of
the spec line weight and all weight modifiers, penalties and allowances. In the event that a competitor increased
their weight in accordance with the tire size option (section 9.1.9.1.L.1) that weight must be presented.
b) In order to inform competitors, spectators and tech officials, competitor’s are required to declare their
spec line number. Touring 1 spec lines have a column called “spec line number”. This number is to be presented
legibly, behind the driver’s window in a font greater than .75 inches tall. The formats “Spec Line #XXXX” and
“SL# XXXX” are recommended.
N. Approved Cars and Engines
The following car and engine combinations are approved in T1. Send a request to the Club Racing Board
http://www.clubracingboard.com/ to add additional cars or engine variants.

Q. Eligible cars-
1. GT4 and Homologated cars must be based off of USDM models. Only cars listed in the spec lines below are permitted
to compete in Touring 1. Lightweight and Non-USDM models (ie. KTM X-Bow or Ginetta G56) will not be classed.
2. New classifications will be considered pending a complete request through the SCCA’s letter system. Newly created
spec lines will be required to complete at lease 3 Super Tour weekends before the spec line is eligible for Runoffs
competition. This ensures reasonable data collection and comparison prior to qualifying to enter the national
championship race.
R. Approved modifications to homologated cars- All cars must conform to the rules set defined in their spec line unless
otherwise noted below.
1. Cars built with front windows are permitted, but not required, to remove them.
2. Safety equipment: Seats, Belts, Nets, and steering wheels may be replaced with SCCA compliant alternatives. All cars
must meet SCCA cage and safety standards.
S. Fuel- Cars must use fuel that conforms to section 9.3.25 or to the Runoffs Supplemental regulations.
T. Tires- Tires must conform to GCR section 9.3.45 Tires and also must conform to spec line requirements. DOT approved tires
are required.
U. Performance adjustments- The spec lines include specific requirements to achieve parity with other Touring 1 cars. These
may include specific ECU programming, inlet restrictors, weight, etc. Notes in the spec lines supersede rules set forth in these
category rules. Each spec line defines which rules set it must conform to.
V. Labeling-
1. These rules may include many options that affect a vehicle’s competition weight.
a) The competition weight must be shown on both sides of the car. The competition weight is the sum of
the spec line weight and all weight modifiers, penalties and allowances.
b) In order to inform competitors, spectators and tech officials, competitors are required to declare their
spec line number. Touring 1 spec lines have a column called “spec line number”. This number is to be presented
legibly, behind the driver’s window in a font greater than .75 inches tall. The formats “Spec Line #XXXX” and
“SL# XXXX” are recommended.”

conform with the requirements of GCR Section 9 unless this Category is specifically exempted from said
requirements. OEM specifications are as delivered from the manufacturer. In no way are any category rule
modifications, swaps, updating or backdating to be performed to any component of the complete engine including
intake and throttle body unless specifically allowed in the spec line. Specifically, any spec lines that contain the
phrase or acronym OEM in the maximum displacement or engine notes section of the spec line, MUST adhere to
OEM specs, EXCEPT engine bore. These engines may be bored out to a maximum of .040” over standard bore size.
These specifications are presented as an adjunct to your Factory Shop Manual. They are not meant to supersede
the information that is in your manual that legitimately applies to your make, model, and year of car with the
exception of stated allowances on the spec line OR allowances in the category rules. Updating and backdating of
any component is specifically not permitted unless the models are listed on the same specification line or the
category rules allow an open allowance and you choose to use an OEM part. No unlisted models or factory options
are eligible unless the vehicle model is on the spec line. If no specific model or options, option packages are listed
on the spec line, the classified car is the base model with no options. These specifications reflect the best
information available at the time of publication. Any error found will be updated when reliable specifications from
the factory/factory distributor/aftermarket supplier or other sources recognized by SCCA, Inc. In the case of
foregoing exceptions, the TCS will hold priority. Voids or mistakes that may occur in the TCS do not allow you to
change your vehicle to conform to the TCS.
T1 Category Purpose and Philosophy:
The intent of the T1 category is to allow competition of production-based vehicles, at a moderate (limited prep) to
high level (full prep) of preparation and performance allowances, using DOT approved tires. Vehicles in this
category must be identifiable with vehicles offered for sale to the public and available thru manufacturer
distribution channels within the US. Alternate cars may be approved on a case by case basis but will be limited to
factory-based models. The T1 philosophy is taking a production-based vehicle and applying safety equipment and
sensible and widely available performance modifications to create a Limited Preparation spec line. There will be
some case by case Full Preparation vehicles permitted in the T1 category, however the T1 category will become
almost exclusively a Limited Preparation class over time and Full Preparation vehicles or modifications that are not
Limited Preparation in nature will be more appropriate for the GT category and not T1. Cost controls and
complexity controls will be strongly considered with car classifications and permissible allowances or modifications.
Factory produced race cars will be considered on a case by case basis with a bias toward no additional performance
modifications or allowances and classed as Limited Preparation only. Any new vehicle classifications will be classed
as Limited Preparation level only. Non-OEM forced induction requests will be considered on a limited case by case
basis, however if classified will be restricted to a Limited Preparation level. Permitted allowances will first consider
OEM or manufacturer available allowances before aftermarket allowances are considered. The T1 overarching
philosophy is to make Limited Preparation vehicles more attractive in T1 than Full Preparation vehicles while
controlling cost and complexity.
Engine swaps: Will be considered on a case by case basis as cars age or upgrade kits become available. These
engine swaps will only be within the same family of manufacturer (Chevy-Chevy, Ford-Ford) and must be the same
architecture and layout. Engines may not be bored/stroked unless specifically permitted.
T1 car eligibility: Cars are eligible for the class when they appear on a specification line and with the specific
allowances permitted. Allowances that are permitted are not mandatory and a vehicle may race without an
allowance that is permitted (OEM part) within the T1 rules and limitations. In addition, T2 cars may race in the T1
category – one class above their T2 class if they are in a T2 legal configuration that conforms to the T2
specifications and allowances as classified in T2.
Limited T1:
See Limited T1 specification lines for the list of cars permitted to run in T1 in a limited preparation level
configuration. These cars shall be prepared to the T2 level of preparation found in 9.1.9.2. Aftermarket headers
allowed. Limited prep cars running stock OEM manifold/headers as delivered may subtract 50lbs. from the specified
weight.