Trans Am Class Rules and Specifications: as of 4/4/2021 Chassis Specification: Four Wheel Drive touring car chassis only. Any era or brand 4wd chassis is allowed. ***All Cars must be Full Time 4wheel drive no “1-way” diff or pulley system is allowed*** Ride Height Specification: Minimum ride height is 5mm on Carpet Weight Specification: Minimum 1425g in race-ready trim Battery Specifications: ROAR approved 7.4v- 7.6v 2 cell LiPo hard cased, 6000mAh MAX limit. 8.40v is maximum voltage allowed. All house track rules regarding LiPo usage apply. Approved ESCs: ANY ESC that is ROAR approved and using ROAR approved “Blinky” spec software or on this list Tire & Wheel Specifications: The only tires allowed are PROTOform VTA Rear Tires (31mm) - #10139-00 and PROTOform VTA Front Tires (26mm) - #10140-00, using stock tire inserts provided with tire and any HPI or Protoform Vintage wheels designed to fit these tires. All other tires and/or part numbers are illegal. Wheels and tires designated as "front" must be used as front tires/wheels, "rear" wheels/tires must used as rears. Five or Eight spoke wheels available in various colors. 0mm offset front wheels and 6mm offset rear wheels are intended for 26mm width fronts and 31mm width rear tires. HPI 8-spoke Vintage wheels from #3805 through #3814, 5-spoke Vintage wheels from #3815 through #3822 and Vintage stock car wheels from #3854 through #3860, Vintage Wheel CC Type #33472 and #33473, Vintage Wheel DTP Type #33474 and #33475 are all legal wheels. Protoform wheels 2766-03, 2766-04, 2765-03, 2765-04 are all legal wheels. Grinding of tire tread is NOT permitted. Sanding of mold seam to remove seam is allowed.
Tire traction compounds are at the discretion of the track. No other altering, changing or softening of the tire is allowed. Tires may not be belted or changed to prevent "ballooning". No "double stuffing" of foam inserts allowed—only single stock vintage tire inserts are allowed. All decisions of the race promoter or track owner are final. Motor Specifications: Any ROAR approved 25.5 motor that is on the ROAR list and only 12.3 rotor Novak SS25.5 Pro brushless motor (pn:3425V) or Ballistic 25.5 (pn:3625V-stator only pn:S6625) Club (pn:3331) or Boss (pn:3626V) are grandfathered in and also legal Only physical motor timing advance is allowed, however Ballistic/Boss motors may be advanced beyond the last line of the timing range sticker. 12.3 mm rotor diameter only (no "tuning" rotors are allowed, only stock Novak rotors allowed). Using ceramic bearings in the motor makes you a dork. No modifications or optional parts allowed on motor can, endbell, stator, or rotor other than the Boss #5925 Ballistic 540 Vented Endbell/Bearing Racing Upgrade Kit (replacement) . No cooling holes or other changes allowed to motor. Fans and external clip on heatsinks are allowed, but integral type heatsinks/fans including but not limited to those that require motor disassembly to mount are illegal. All decisions of the race promoter or track owner are final. Race Specification: - 5 minute qualifiers - 8 minute mains - Larger Races IFMAR-type starts are a better option. All smaller “club” heats and mains should be straight-up starts, with random sorts for each heat if desired. Non random sorts should shuffle starting order for each heat. Optional Main Variations: - 12-20 car A-mains, depending on car counts. - Invert qualifying order based on random hat pull (top 6-10 cars).
- "LeMans" type starts where all cars are lined up on an angle to the racing line in order. - Run track in reverse rotation for mains. - Rolling starts MOST IMPORTANTLY: If it's not in the rules, and does not encompass the spirit of slower, controlled racing with realistic looking cars, consider it illegal. This is called the "Spirit of VTA" Rule. The class is based on slower, equal playing field competition with less traction, minimal aerodynamic aids and mostly older carpet racing technology. The final objective is close, fair, wheel-to-wheel racing for all. All decisions of the race promoter or track owner are final. Body Specifications: Late '60s to early '70s American pony car Vintage Trans-Am bodies only Body provided deck lid spoilers allowed (not wings). For the HPI, Bolink/RJ Speed Mustangs, McAllister Cougar and others which are not provided with a spoiler: A lexan spoiler of 16mm total height from trunk deck, and overall chord of 20mm is allowable. All other bodies must use the spoiler included with that specific body set. Built in spoilers may not be enhanced. No additional skirts or raised/extended wings or air control surfaces allowed unless specified by these rules. Body must be trimmed at body trim lines. Front spoiler may be extended into body to provide durability. Full rear bumper required. It is highly preferred that bodies are detailed in race type livery in period-correct paint schemes. Fluorescent colors, wild graphics, chromes and non-period correct paint schemes are frowned upon. All cars must have a number on the hood, both doors and trunk lid. Wheel covers of any type are NOT allowed.
Altering the body for the purpose of lightening by sanding, scraping, or any other method is ILLEGAL.Body minimum weight 95g - any additional weight required for a legal body must be added to the roof of body All cars must include a three dimensional driver figure consisting of at least a head and shoulders. Driver Figure part numbers (ANY suitable 1/10 driver figure is legal-these are readily available examples) HPI #104815 INNER BODY SET FOR DT-1 TRUCK BODY Associated 6180 Driver, unpainted, 1:10 McAllister #423 Stock Interior and Driver #419 SPRINT CAR DRIVER Bolink part numbers: BL2262 '68 Chevrolet Camaro Also known as RJ Speed Part # BOL2262 BL2263 '65 Ford Mustang Also known as RJ Speed Part # BOL2263 HPI part numbers: 17510 - 1970 Plymouth AAR 'Cuda 7494 - 1968 Chevrolet Camaro 17531 - 1969 CHEVROLET CAMARO Z28 17508 - 1965 Ford Shelby GT-350 17519 - 1966 Ford Mustang GT 104926 - 1966 FORD MUSTANG GT COUPE BODY 17546 - 1970 Ford Mustang Boss 302 (scale wing ok) 105106 - 1970 DODGE CHALLENGER BODY McAllister Racing part numbers: #286- 1969 Mustang body #295- 1970 Pontiac Firebird Trans Am VTA body- 1/10- 200mm #304– 1970 CAMARO TRANS AM BODY–1/10th, 200mm, VTA Class #305– 1968 COUGAR TRANS AM BODY–1/10th, 200mm, VTA Class
USGT Class Rules and Specifications as of 3-7-2022 Chassis Specification: Any 1/10 4wd or Fwd sedan with 4 wheel independent suspension Weight Specification: 4wd Minimum 1350g in race-ready trim Fwd no minimum weight Ride Height Specification: Minimum ride height is 5mm on Carpet Tire & Wheel Specifications: Tires- Note: JANUARY 1 2014 The Ride spec tire will become the official spec tire for USGT RIE24025 - set of 4 available through Gravity RC http://www.teamgravityrc.com/ to dealers and retail Tires- RIE24025 - set of 4 available through Gravity RC http://www.teamgravityrc.com/ to dealers and retail Grinding of tire tread is NOT permitted. Sanding of mold seam to remove seam is allowed MUST USE INCLUDED INSERTS Wheels- Any 24mm - 26mm spoke (non-dish) type wheel Motor Specifications: The only legal motor for USGT will be the USGT Spec motor #GRC2000 USGT SPEC MOTOR RULES GRAVITYRC #GRC2000: NO rotors, sensors or stators outside of the below specification provided will be considered legal.Aluminum or stainless steel main can or end bell screws are prohibited for USGT competition. MOTOR TECH CHECKLIST:
MEASUREMENTS TAKEN AT ROOM TEMPERATURE OF 75DEG F* AVERAGE STATOR POLE RESISTANCE: (TOLERANCE 30.0--30.7 ohms) AVERAGE TIMING AT 5,000RPM: (TOLERANCE 30--33deg) TOTAL SENSOR GAP: (TOLERANCE 0--3deg) ROTOR ALIGNMENT: (TOLERANCE 0--5deg) (These measurements were developed by Gravity RC with their in house test equipment.For assistance with motor technical inspection for your race or club track, contact Gravity RC email@example.com) ROTOR: Must use stock rotor - USGT logo engraved on shaft Approved ESCs: ANY ESC that is ROAR approved and using ROAR approved “Blinky” spec software or on the USVTA list Battery Specifications: Any 7.4v - 7.6v 2s ROAR approved hard case batteries. 8.40v is voltage maximum allowed. Race Specification: 6 minute qualifiers 8 minute mains (shorter mains may be specified by race director) MOST IMPORTANTLY: If it's not in the rules, and does not encompass the spirit of fun, controlled racing with realistic looking cars, consider it illegal. This is called the "Spirit of USGT" Rule. Body Specifications: Refer to body list for currently available/approved bodies. FWDMUSTuse FWD bodies. Scale realism consideration: Bodies intended for the USGT class should conform as closely as possible to the full scale car it represents. Added elements, including, but not limited to, cuts, channels, raised or lowered sections of the body, additional air control devices and distortion of the body shape are prohibited. Only the addition of a front splitter is allowed. While recognizing that translation of a
full scale car to a 1/10 radio control model is never perfect, intentional distortion for aerodynamic gain is cause for rejection of a body. A sample of the body may be requested for examination. Body approval is a subjective process. The main aim is to preserve scale looks over ultimate aerodynamic performance. Questions on design can be sent to firstname.lastname@example.org prior to production. Examples of bodies considered for approval: *Can AM or IMSA style bodies, similar to 1/12 or 1/8 bodies using an integrated wing are illegal. EX: Porsche 962 style bodies or LeMans P1. *Japanese GT OK *German DTM OK *NO Trucks vans minivans school buses garbage trucks, utility vehicles, moon landers, zambonis,golf carts, quads, etc allowed. *No fantasy or unproduced concept vehicles. If it’s not a car it’s not legal. DISCONTINUED BODIES: Discontinued unlisted bodies will be added as the USVTA sees fit to add them in based on the spirit of the class. Your Local track can always make adjustments to this rule...Please use the following if you want to deviate from the Body list for local racing DISCONTINUED BODIES general guidelines: *Any 190mm or 200mm body appropriate for this class. *Body can be any body that is NOT or HAS NOT BEEN on the ROAR T2 body list. Track director or race promoter has the final say on legality of discontinued unlisted bodies. Altering the body for the purpose of lightening by sanding, scraping, or any other method is ILLEGAL. Minimum finished body weight : 95 g -- Any weight which must be added to body for minimum weight requirement must be added on the underside of the roof panel Paint: Scale type race liveries encouraged. Ugly bodies will berated and scorned. No clear bodies.
Splitter: Bodies not equipped with a front splitter / spoiler may attach a flat lexan splitter to the front lower fascia. This must protrude from the front end parallel to the ground/track surface. When measured from the vertical surface of the body, it may extend up to 8mm. This device may only be mounted between the forward edges of the front wheel well arches. Bodies with molded in splitters may not extend or improve the molded in device. Wing: Any "SCALE" molded wings can be used. Lexan wings 10mm maximum height / side dam height must match top edge of wing. Side dam may extend below wing. See diagram (courtesy Mike Rydwell). Clear wings not allowed. .