Chassis 

IFMAR/ISTC legal 190mm touring car four-wheel drive. (Two-wheel drive to front or rear wheels is also allowed.) Flat Pan (1/12th and 1/10th Track Style) chassis are not allowed. Chassis must have independent suspension on all four wheels. Each driven wheel must have a flexible joint, eg: dog bone/s or universal joint/s in its driveshaft. Drive train and suspension design is free from restriction. The Chassis must not be shaped to gain an aerodynamic advantage. In principle the underside of the chassis must be flat and parallel to the ground along the entire length of the body-shell. Aerodynamic shaped parts (splitters/diffusers/tunnels/etc) may not be fitted to the chassis.

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Motor 

Any ROAR or BRCA approved motor. All brushless motors for the Stock class will be wind rating of 21.5 turns, clearly indicated by the manufacture on the external casing. Stator, Stock Motor: Only three slot “Y” wound stators are permitted. No delta wound or slot less stators are allowed. Only circular (round) pure copper magnet wire permitted. The three slotted stator must be wound with 21.5 turns of 2 strands of a maximum diameter of 0.0724 mm per slot.

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ESC 

Any ROAR or BRCA approved (stock class) Speed controller. Stock classes ESC must provide zero timing advance, along with disabling advanced motor control functions (i.e. Boost, Cheat Mode, Turbo, etc). When the “0 Boost” profile is enabled, it shall be indicated by a blinking LED while the ESC is armed and in neutral position

 

Gearing 

• Open – No restrictions.

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Tyres

• Tyre cleaner permitted.

• Tyre warmers permitted.

• Tyre additive permitted.

• No double-stuffing of inserts

 

In order to make it easier to buy tyres for VTA, GRCR has widened the range
of eligible VTA wheels and tyres to the following;​

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HPI D Compound VTA tyres

• Vintage Racing Tire #4793 (front) and #4797 (rear)

• Vintage Slick Racing Tire  #4791 (front) and #4792 (rear)

• Vintage Performance Tire  #102993 (front) and #102994 (rear)

• Mounted an any HPI VTA Wheels

• Supplied insert must be used

 

Protoform pre-mounted VTA tyres

• VTA Front Tires (26mm) Mounted #10140 17 (white) OR 10140 18 (black)

• VTA Rear Tires (31mm) Mounted #10139 17 (white) OR 10139 18 (black)

 

Gravity pre-mounted VTA tyres (sets of 4)

• G-Spec VTA Tyres #GRC145B (black)

• G-Spec VTA Tyres #GRC145W (white)

 

Tamiya tyres

• 26mm Slick Tyres #50454 (front) on any Tamiya 26mm two-piece rim

• 31mm Slick Tyres #50547 (rear) on any Tamiya 31mm two-piece rim

• Supplied insert must be used for #50547

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Battery

• Any two (2) cell Hard-cased 7.4volt Lipo pack. As per the approved listed on the ROAR or EFRA websites.

 

Body Shell

Pre-1990 Touring Car and Trans-Am bodies.

• Deck lids and spoilers that come out with the car are allowed.

• No additional skirts, raised/extended wings or air controlled surfaces are permitted.

• Body must be trimmed to trim lines.

• Full rear bumpers required. If unsure check before racing.

• Bodies considered outside the spirit of the sport can be excluded without notice.

 

Hop-Ups

• Any hop up available from any manufacturer.

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Weight

• Minimum 1450 grams ready to run including transponder.