The fastest passenger cars such as Porsche 996, Accura NSX, Audi R8, BMW E46 M3, Dodge Viper and Nissan GTR. Exception: The Super Street R class (formerly Super Stock) uses the same rules as Street with the following rules: The road category is a preparation stage for almost unchanged road vehicles. The rules allow you to use certain spare parts for portable items. Replacement shock absorbers, brake pads, plugs/wires and air filters are “free”. Any wheel can be used as long as it has the same diameter and width as the shaft and the shaft is offset to +/- 7 mm. You can replace the front or rear stabilizer and use a cat exhaust. For road category tires, a minimum profile of 200 pieces is required. Tread dimensions below 200 are not permitted. For more information, see section 13 and Appendix A of the Solos Rules.

E-Production is the fastest of the production classes and offers classic and contemporary sports car racing based on production. Examples of cars are the Datsun 240z, Mazda Miata, Mazda RX-7, Honda S2000, Triumph TR6, Caterham 7 and the BMW Z4. Little fun to drive small cars with minimal preparation. The class aims to offer competitive rides at a lower cost. Vehicle modifications are specified and weight losses are used between different brands to ensure power parity. Examples of cars include the Honda Fit, Mazda 2, Chevrolet Sonic and Mini Cooper. MODIFIED is everything from pure, custom racing machines such as formula cars and sports race cars to cars that started as production vehicles but may have different engines, heavily modified bodies and racing slicks. GT vehicles are bespoke and heavily modified “silhouette” replicas of production sports sedans. GT cars are allowed tubular chassis where performance is balanced by allowing cars with smaller engines to compete with lighter weight. The GT-1 cars are the fastest in the class and come closest to the SCCA Pro Racing® Trans-Am Series®. Some of the current GT-1 favourites are last year`s Trans-Am cars, and many of these GT-1 drivers compete in some Trans-Am events throughout the season.

The GT-2, GT-3 and GT Lite cars become lighter and less powerful. Cars include the Toyota Celica, Mazda RX-7, Nissan 200SX, Honda Civic, and Austin Mini Cooper, to name a few. Formula cars with a Mazda 13B rotary engine sealed for high revs and occasional flames from the exhaust. The cars have a chassis with a tubular steel frame, with the front shock absorbers on board operated by upper rocker arms. The cars also have a front and rear spoiler. Formula Mazda is often seen as a stepping stone to the Mazda Pro Championship and the Mazda Indycar ladder system. If you want Braap Braap in your formula car, this is the race car for you. OTHER REGIONAL CLASSES – Some regions may implement their own classes, such as a road tire class that requires 140 trendy tires, vintage classes for older cars, and even beginner or rookie classes for new competitors.

Many great sports cars race here, including older classics. Examples of cars include the Mazda Miata, Triumph Spitfire, Lotus Super Seven, Lancia Scorpion and Fiat 124 Spider. Below are the 28 classes that participate in SCCA Club Racing Majors events. In some cases, Club Racing class cars have a sister series in the professional ranks, making it easy for many drivers to move from Club Racing`s competitive experience to professional status. In fact, many of America`s top riders, such as Sam Hornish Jr., Buddy Lazier, Boris Said, Scott Sharp, Al Unser Jr. and Jimmy Vasser, have competed in certain categories of SCCA Club Racing programs. These are racing cars specially designed with the Stohr WF1 and the Radical Prosport. These cars are lighter and have less power than GT1 cars. Examples of vehicles are the Porsche 944, Porsche GT3 Cup, Chevrolet Corvette and BMW M3. The Grand Touring 1 is the fastest of the Grand Touring classes and closely related to the Trans-Am Series vehicles. Older cars retired from the Trans-Am series are often in competition.

Examples of cars are the Porsche GT3 Cup, the Chevrolet Corvette and the Ford Mustang. The Street Prepared category builds on stock and street tour rules and allows for further modifications, again mostly bolts. Wing extensions, regardless of wheel size, low torque, Panhard rods and LSDs are allowed. You should not pierce the engine beyond 0.0472 inches, use an alternative cam or a spare turbocharger. They run on DOT R tires like the Hoosier A6. For more information, see section 15 and Appendix A of the Solos Rules. STREET MODIFIED allows engine changes (within the same manufacturer), addition for forced induction and any suspension, as long as it uses the same mounting points. It`s a class for true creatives, and cars sometimes only have a fleeting resemblance to their base. It`s the craziest of classes that runs on DOT approved tires. Great race with classic production sports cars.

HP is the slowest of the production classes and includes examples of cars such as the Triumph Spitfire, MG Midget, Honda CRX, Honda Civic, Fiat X-1/9, Austin-Healey Sprite and the Volkswagen Golf. A newly created segment of racing cars called B-Spec is targeting the subcompact market. Manufacturers have a vested interest in increasing the popularity of this segment by encouraging more customers to drive cars that are smaller, fun, fuel-efficient and easy to handle. The aim of the class is to provide (relatively) cheap access to racing, with the intention of sanctioning authorities to maintain a single “specification” for cars so that they can compete in each series with minimal changes. Classifying your car is fun and easy! The SCCA publishes the solo rules annually to classify a full range of imported and domestic custom sports cars, sedans and race cars and to establish the ground rules for solo competition. Solo vehicle ratings are provided so you can determine what types of cars typically compete in Solo, although there is a class for almost all vehicles. Local event organizers also have ample leeway to add courses based on their specific needs. With the exception of the addition mentioned above, the rules and guidelines for Targa track elements are based on the SCCA time trial rules. The experience, road, touring and production classes follow the PDX and Club test rules, while the Unlimited class follows the rules of the track test rules. Formerly known as Formula Ford with the 1600cc Kent engine, the category has recently been expanded to include a 1.5-litre Honda Fit engine.

The cars have narrow tires and no fenders, making it a great open-wheel race. The class has been around for over 45 years and has a history as a starting series for professional riders. There are a variety of different chassis manufacturers, including Lola, Van Diemen, and Reynard. These open-wheeled cars use 1000cc motorcycle engines with a chain driver that spins high and makes the cars sound like high-performance road bikes or older F1 cars. Some cars are converted from Formula Continental (FC) or Formula Ford (FF), but specific chassis can also be purchased from various manufacturers. These open-top formula cars used two-stroke engines under 500 cc from snowmobiles. New engines are now available, including the Rotax 593cc with additional weight loss. Internal modifications of the engine are not allowed. Cars also use unique elastomer “washers” for suspension instead of conventional shock absorbers. The chassis and bodywork are defined by strict dimensional restrictions. Prepared vehicles in the category are usually SCCA road racing machines. They have weight, carburetor and wheel size restrictions, require roll bars and are generally not allowed to circulate (see regulations for more information).

They also ride on full racing slicks. Unfortunately, otherwise, street class cars with spare cameras or eviscerated interiors have to work here to be legal.