Drag racing classes
There are many hundreds of classes and drag racing each should have different requirements and restrictions on things such as weight, engine size, body style modifications etc. etc. NHRA and IHRA share some of these classes, but most classes are sanctioned by one of the aforementioned. The NHRA boasts over 200 classes and the IHRA has fewer. Some of them have multiple subclasses to differentiate by engine components and other features. There are even classes for youngsters called Junior Dragster which typically uses 1/8 mile track.
In 1997, the FIA cars and UEM bikes began sanctioning drag racing in Europe and the establish the European Drag Racing Championship in cooperation with the NHRA. The major European drag strips are Santa Pod Raceway in Podington, England; Alastaro Circuit, Finland; Mantorp Park, Sweden; Bardermoen Raceway, Norway and the Hockenheimring in Germany. The major difference is the nitro class distance, which is 300 m at some tracks but there is a discussion to distance change it in the future.
There is also an arbitrary definition of what constitutes a "professional" class. The NHRA includes five Pro classes; top fuel, funny car, pro stock, Pro modified and pro stock motorcycle. The FIA features a different set of five Pro classes; top fuel, top methanol dragster, Top methanol funny car, pro modified and pro stock. Several other sanctioning bodies have different definitions and a partial list of these classes includes:
Top fuel dragster. The rail directors or diggers are the fastest class. They are the fastest accelerating machines in the world and cover the drag strip in lesson 3.8 seconds with record speeds over 325 mph. Top fuel cars are 25 feet long and weigh 2320 pounds in race ready trend. Methanol fuel mixed up to 90% nitro methane is used.
Top fuel funny car. Similar to their top field counterparts but with a shorter wheelbase and carbon fiber body that resembles a production-based automobiles, funny cars are floppers routinely run in the 4.0's and can exceed 350 mph.
Pro Stock often called factory hot rods because they resemble production-based cars and they have to maintain a relatively stock appearance. They are commonly called Door slammers. Pro stockers can record quarter-mile times in the 6.4 second range with speeds over 210 mph. They can speed to more than 10,500 RPM and make in excess of 1300 hp. The engine can be no more than 500-cubic-inch 8.2 L displacement in the NHRA but in the IHRA cars can run a maximum of 820-cubic-inch or 13.4 L there called Mountain motors. Both classes require the motors to be naturally aspirated.
Pro Stock Motorcycle, these highly modified vehicles run under 6.8 seconds at more than 195 mph and feature a purpose built tube chassis and a lightweight aerodynamically enhanced replica of the original bodywork.
ProModified or Top Doorslammers. Some engine restrictions with very high power these cars can run superchargers or turbochargers or nitrous oxide. Cars running blowers are limited to 527-cubic-inch or 8.6 L while cars would nitrous can run up to 740-cubic-inch or 12.1 L. This class is globally recognized even though the names differ between North America and Australia.
Top Alcohol Dragster, known as top methanol dragster in the FIA competition. These dragster's resemble top fuelers but have significant differences. They use a supercharged methanol burning engine or an injected nitro methane combination and they can run in the 5.1 s at more than 280 mph.
Top Alcohol Funny Car, known as a top methanol funny car in the FIA competition. Similar in physical appearance to their nitro burning funny car counterparts, these cars are restricted to the use of methanol fuel and at three speed transmissions. They can run in the 5.4 s and more than 265 mph.
Competition eliminator. This is the NHRA class of the most variety in each of its 88 sections is assigned an index based on what a well-built car should run.
There is also the Outlaw series and the Pro FWD.
Super Comp/Quick Rod. The quickest of the heads up super classes is composed primarily of dragsters. Most cars are capable of running well in the index but use electronic aids to run close to it without breaking out.
Super gas/super Rod entries run at 9.90 index and are primarily full-bodied cars and street roadsters. No dragster's or altered's are permitted. They also use electronic aids to run as close to the class standard without going under.
Super Street/hot Rod racers compete on a fixed 10.90 index. All vehicles must be full-body cars and weigh no less than 2800 pounds except for the six cylinder cars and four-cylinder and rotary powered cars. Engine and chassis modifications are virtually unlimited.
Super Stock Super Stock vehicles resemble ordinary passenger cars that are heavily modified. Entries are classified using factory shipping weight in horsepower and compete on indexes. The breakout rule is enforced.
Stock cars are similar to Super Stockers, but the rules from engine modifications to body alterations are stricter. Virtually any car is eligible to compete in the entries are classified using factory shipping weight and horsepower.
Top Sportsmen are competitors in these full-bodied entries and choose their own dial for eliminations, generally from 6.00 to 7.99 seconds. Full tree starts are used and breakout rule is enforced. Cars can run in the sixes at more than 200 mph.
Top Dragster competitors in these open will entries can choose their own dial for eliminations, generally from 6.00 to 7.70 seconds. Full tree restarts are used and the breakout rule again is enforced. Cars can run any combination of motor, blown, turbo, nitrous or just all motor.
Top fuel funny bikes are high performance five-second bikes.
Nostalgia super stock
NHRA and ANDRA Summit Racing series Super Pro, Pro and bike.
Junior Dragster include racers between the ages of eight and 18 and may race at half scale version on the sports fastest car, the top fuel dragster. Juniors run as follows: 12.90 slower for 8 to 9-year-olds, 10 to 12-year-olds at 8.90, and 13 to 18-year-olds at 7.90 and slower at a top speed of 85 mph. These cars race at 1/8 mile or 1/16 mile.
NHRA new class for juniors is JR COMP running at 6.90 at a top speed of 110 mph and 1/8 mile or 1/16 mile.