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Class divisions:
DSL: >15.00 seconds over ¼ mile
CSL: 14.00 <-> 14.99 Sec.
BSL: 13.99 <-> 13.00 Sec.
ASL: 12.99 <-> 12.00 Sec.
XSL: 11.99 <-> 10.00 Sec.
Each participant must be in possession of:
- Valid driver’s license
- Valid insurance certificate
- Valid license plate
- Valid TÜV inspection certificate – all technical modifications must be recorded in the vehicle documents
If any of these documents are not presented, the participant may be excluded from participating in the event.
GENERAL
Every vehicle that takes part must be in the same condition as it is when driven on the road. The vehicle should therefore be tidy, as it would be when presented to the TÜV. The interior must be complete, preferably with the original cockpit. The car must not leak any fluids.
EXAMINATION
The driver is obliged to have his car checked in the same condition as at the event/competition.
This means:
- The car must be free of loose parts
- Hubcaps on rims are not permitted
- The correct tires must be fitted
- Have a helmet and any necessary clothing ready for the examiner
If the above points are not complied with, the car cannot be inspected. It is NOT permitted to have the car inspected on a trailer. If you have any questions about the rules, please contact us by email or via the contact form.
1. ENGINE
1.1 Engine
All engine types are permitted, Wankel engines are limited to 2 rotors. All carburetor and fuel injection types are permitted.
Electronically controlled fuel injection systems must comply with NHRA General Regulations 9.1. Engine swaps are permitted if of good build quality.
1.2 Exhaust
Must be gas-tight and equipped with functioning silencers. The prescribed requirement of max. 98db must be observed..
Exhaust systems must be properly mounted under the car, the system must be complete and end behind the rear wheel at the rear of the vehicle.
Furthermore, every participant in OSL races must observe the noise regulations for specific race tracks.
It is not permitted to use a flexible pipe as the end piece of the system.
1.3 Fuel
Gasoline, racing gasoline, LPG, natural gas, alcohol, ethanol, E85, HVO100, (gasohol) are permitted. Nitromethane is not permitted! Racing gasoline may not be produced by the user.
1.4 Fuel system
The entire fuel system must be located outside the driver’s cab, with the exception of OEM. Fuel lines located near the transmission/gearshift must be protected by a steel pipe with a minimum length of 400 mm and a minimum wall thickness of 3.2 mm.
Fuel lines must NOT be routed through the shaft tunnel.
Coolant reservoirs, control blocks, etc. must be located at least 15 cm in front of the flywheel in rear-wheel drive vehicles. In front-wheel drive vehicles, they must be located at least 15 cm to the side of the flywheel.
If these items are located in a different position as standard, this is permitted if the car is slower than 11.99 seconds over 1/4 mile.
In the case of a non-OEM mechanical fuel pump, a manually operated shut-off valve must be installed in the main fuel line (between the tank and the injectors/carburetor) so that it can be closed in the event of an accident. The shut-off valve must be located within reach of the driver. See NHRA
General Regulations 1.5 .
1.5 Cooling system overflow canister
An overflow tank with a capacity of at least 500 ml for the cooling system is mandatory for all vehicles. This must be installed correctly. See NHRA General Regulations 1.6.
1.6 Nitrous oxide
Permitted, provided that the cylinder complies with the DOT1800 standard and is correctly assembled.
All fittings and pipes must be from the same manufacturer. The ventilation must be located outside the driver’s cab (Nitro Info).
If the nitrous oxide cylinder is installed in the driver’s cab or trunk, it must be equipped with a blow-off pipe to the outside.
Nitrous oxide intercooler systems are permitted. The combination of turbo/supercharger and nitrous oxide is permitted.
Commercially available thermostatically controlled bottle warmers are permitted.
Until the line-up, it is permitted to warm the bottle in other ways.
At the line-up, only a commercially available bottle warmer is permitted.
An NOS sticker should be clearly visible on the gas cylinder and near the cylinder. The minimum size is 3“ x 3”. See NHRA General Regulations 1.9.
1.7 Supercharger, turbocompressor
Permitted. Screw and Roots type chargers are permitted for vehicles if OEM.
Intercoolers may be cooled by water, ice, and CO2, provided they cannot leak.
A turbo engine must be equipped with a wastegate connected to the exhaust system or running to the rear of the vehicle.
1.8 Engine Oiling System
Trockensumpfschmierungsanlagen sind zugelassen, alle Ölleitungen müssen sich außerhalb des Fahrerraums befinden.
Ölleitungen die sich in der Nähe vom Schwungrad befinden müssen geschützt sein durch ein Stahlrohr mit einer Länge von mindestens 400mm und einer minimalen Wandstärke von 3,2 mm.
Es ist nicht erlaubt Ölleitungen durch den Wellentunnel zu verlegen.
1.9 Screamer Pipes
Scream pipes must end in the exhaust system.
1.10 Oil Catch Tank
Mandatory for all vehicles where the OEM crankcase ventilation has been interrupted or modified. A separate filter on the valve cover is not permitted.
Tank capacity should be at least 500 ml.
1.11 Pipelines
All fuel, transmission, brake, and steering wheel lines must be securely mounted and leak-proof.
The use of cable ties is not permitted. Non-original lines must be made of steel or plastic with a steel braided outer jacket.
Fuel lines must not be routed through the shaft tunnel.
2. DRIVE
2.1 Drive shaft
Four-wheel drive is permitted if standard equipment.
All cars that run faster than 13.99 seconds in the 1/4 mile with slicks and rear-wheel drive,
or 11.49 seconds and faster with E or D.O.T.-approved tires must be equipped with a safety loop.
This must enclose the drive shaft. Open drive trains near the driver and unenclosed drive shafts are not permitted. Material specifications and drawings are available upon request.
2.2 Flywheel shield
The flywheel shield may consist of several parts and must be secured to the engine and/or transmission with M10 class 8.8 bolts.
See NHRA General Regulations 2:5, 2:6, 2:9, 2:10.
2.3 Clutch
The clutch must be operated by foot in every car.
Manual clutch control is permitted with EU disabled parking permits.
Clutches in cars faster than 11.99 seconds – 1/4 mile must be equipped with an SFI 1.1, 1.2, or 1.4 or similar FIA test sticker.
2.4 Automatic transmission
Every vehicle equipped with a non-OEM automatic transmission must be fitted with a reverse lockout system that prevents the driver from accidentally engaging reverse gear.
A safety switch must be installed to ensure that the vehicle can only be started when the selector lever is in the “P” or “N” position.
2.5 Differential lock
Limited slip differentials such as multi-plate or Torsen differentials and OEM differentials are permitted. Welding on the differential is PROHIBITED.
2.6 Axle restraint system
All vehicles must be equipped with a satisfactory means of drive axle restraint.
At least 0.120-inch aluminum or 0.090-inch steel inner bearing cover on rear-wheel drive vehicles.
2.7 Rear end
See NHRA general regulations 2.11
3. BRAKES AND WHEEL SUSPENSION
3.1 Brakes
A minimum of four hydraulic brakes is mandatory. OEM brakes are permitted. See NHRA General Regulations 3.1.
3.2 Steering
See NHRA General Regulations 3:2, 3:3, 4:1.
3.3 Suspension
Each individual wheel on the vehicle must be equipped with a functional shock absorber and spring.
Rigidly mounted shock absorbers are prohibited. Reducing the weight of standard parts is prohibited.
See NHRA General Regulations 3:2, 3:4, 3:5.
3.4 Wheeli-Bars
The use of wheelie bars is NOT permitted.
4. CHASSIS
4.1 Ballast
Permitted when properly installed. See NHRA General Regulations 4:2.
4.2 Chassis
Tubular frames are not permitted.
4.3 Ground clearance
All vehicles must comply with the following ground clearance requirements.
Minimum ground clearance of 76 mm from the front of the vehicle to 30 cm behind the center of the front axle.
The rest of the vehicle must have a minimum ground clearance of 50 mm.
Does not apply to oil pans and headers if permitted.
4.4 Roll bar/roll cage
Class ASL to DSL: Permitted, but not mandatory.
Class XSL: Permitted for vehicles that already have a factory speed of more than 12 seconds. Mandatory for all other vehicles, in particular vehicles that are deemed by the technical inspector to be unsafe without a roll bar/roll cage. For example, a Golf 4 or a Corsa A must have a roll bar/roll cage installed.
4.5 Driver protection
The roll bar or cage in the driver’s head area must be fitted with a protective cover, the wall thickness of which must be at least 8.5 mm.
5. WHEELS AND TIRES
5.1 Tires
The tires will be checked and must have a minimum tread depth of 1.6 mm. It is not permitted to participate in the race with a spare tire, trailer tire, or motorcycle tire. Tires may not protrude more than 30 mm beyond the bodywork.
During the event, the use of slicks on the drive wheels is permitted. The maximum tire size is 9 inches in width.
In case of wet weather, a red flag will be used to indicate that drag radials/slicks are no longer permitted.
5.2 Wheels
Hubcaps/covers over wheel bolts/nuts must be removed for inspection and during the race.
Motorcycle rims are prohibited. Spoke OEM rims are permitted.
The minimum wheel size is 13″. If the car has smaller original wheels and the original engine is present, small wheels are permitted.
All wheel nuts or bolts must be present and properly secured.
See NHRA General Regulations 5:2.
6. INTERIOR
6.1 Formwork
Removal of the rear side panels is permitted. All holes and sharp edges near the driver must be shielded. Front doors should be completely shielded; plastic panels are permitted.
6.2 Seats
Seats must be securely fastened to the floor or rails with a minimum of 4 bolts and/or nuts.
Rear seats may be removed.
See NHRA General Regulations 6:2, 6:3, and Electrical 8.1.
6.3 Belts
All vehicles must be equipped with at least a 3-point seat belt, attached to the OEM mounting points.
They must not show any signs of damage.
If the original seat and 4-point seat belts are used, it is permitted to route the cross piece along the front of the seat instead of through the seat.
The fastenings of these straps should be separable in one movement.
Exception: The Test&Tune 1/8 Hot Rod class does not require a seat belt if, due to the historical age of the vehicle, a seat belt is not required for participation in road traffic.
7. CHASSIS
7.1 Chassis
Chassis modifications are permitted provided they are approved for use on German roads. The doors must be able to be opened from both the inside and outside.
Magnesium may not be used in the manufacture of body panels. The driver’s compartment must be completely separated from the engine, transmission, and exhaust system.
7.2 Windows
The windshield must be in good condition.
The windshield may only have cracks and other damage that is permitted by the TÜV. Glass may be replaced with Lexan or other shatterproof materials, which must have a minimum thickness of 3 mm.
The side windows must be closed during a run.
See Appendix I and NHRA General Regulations 7.7 and 7.8.
7.3 Start numbers and class designation
The following dimensions apply. Start numbers must be at least 15 cm high and at least 3.8 cm wide. Class designations must be at least 7.5 cm high and at least 2.5 cm wide. Both should be in a contrasting color (black/white or blue/yellow, etc.). The use of shoe polish is permitted provided that the above dimensions are adhered to. Irrelevant numbers should
be masked.
See NHRA General Regulations 7:2.
7.4 Bodywork
Every car must have an OEM bulkhead with a minimum thickness of 0.6 mm steel or 0.8 mm aluminum, and must completely separate the engine compartment from the driver.
See NHRA General Regulations 6:1, 7:4.
7.5 Fenders
Fenders are mandatory. Lightweight replacement fenders are permitted.
Rear fenders may be adjusted to fit the size of the tires.
Homemade fenders should have rounded edges and be flanged.
Inner front fenders are permitted.
7.6 Floor
The original vehicle floor must be present. OEM reproductions may be welded in. There must be no holes in the floor.
7.7 Spoilers
Spoilers attached to the trunk of the bodywork, as well as air dams, side skirts, etc., are permitted.
Hydraulically operated spoilers that can be modified during a run are not permitted, except for OEM systems.
7.8 Hood Scoops
Air scoops or hood scoops are permitted if they do not protrude more than 28 cm above the hood and do not obstruct visibility.
8. ELECTRICAL SYSTEMS
8.1 Battery
Must be secured in accordance with OEM regulations. If the battery is installed in the trunk, it must be installed in a liquid-tight container with a drain pipe to the outside. The battery must not be located in the driver’s area unless the battery is located under the rear seat as standard (e.g., BMW, VW, Beetle, etc.).
If this is the case, the rear seat must not be removed during a race. The battery and battery terminals must be taped or well shielded.
Gel batteries are permitted; these do not require a liquid-tight container.
8.2 Ignition
Two steps, rev limiters, etc. permitted.
Two steps, rev limiters, or any rpm-limiting device with the function of a downtrack rpm controller are prohibited. See General Regulations 8:1, 8:3,
8:4, 8:5.
8.3 Lighting
Both headlights and brake/tail lights must be present.
This also applies to windshield wipers and a defroster system.
9. AUXILARY EQUIPMENT
9.1 Computer
It is permitted to use a computer to optimize the vehicle, but only before or after a run and NOT during the run.
Data recorders may be used to record the values of certain vehicle parameters. These recordings may not change any parameters during a run.
Furthermore, it is prohibited to transmit the driver’s time to the driver in real time.
Drivers are permitted to transmit telemetry data to a ground station as well as audio and video images for broadcast on television. However, this must be requested from DHRA Racing one week before the competition.
Telemetry communication should not be used to collect data or parameters or to change parameter settings. See NHRA General Regulations 9.1, 9.2, and 9.9.
9.2 Fire extinguishers
A fire extinguisher/fire extinguishing system is permitted, but must be installed correctly. Only dry powder or CO2 types are permitted.
9.3 Towing vehicles
Towing vehicles are not permitted.
9.4 Warm-ups
See NHRA General Regulations 9:4, 9:12.
9.5 Advertising stickers
DHRA reserves the right to regulate advertising, stickers, flags, or other materials for participants. A participant may be excluded from participating in the race or event if DHRA believes that the statements on the materials, stickers, etc. cast the race, the sport, or the organization in a negative light.
10. DRIVER / CREW
10.1 Clothing
Drivers and crew members are not permitted to enter the race track wearing shorts, T-shirts, slippers, sandals, etc.
Drivers and crew members must wear a proper pair of jeans, a long-sleeved shirt or racing suit, and appropriate footwear in the lineup.
Nylon or nylon-like clothing is not permitted.
A special fireproof jacket or racing suit is mandatory if the vehicle travels faster than 11.99 seconds over 1/4 mile. This jacket must comply with SFI spec. 3.2A / 1 or similar FIA guidelines. If exhaust fumes are emitted from the front of the vehicle, a racing suit is generally mandatory.
Each team is advised to ensure that the presentation of the vehicle and team does not violate any applicable rules.
10.2 Helm
Helmets are mandatory. Helmets must be approved for motorsports and/or equipped with at least one of the following labels or newer:
- ONS/OMK (Germany only)
- ECE series 22/04 or 22/05 (europe)
- SIS 88.24.11(20Sweden)
- NF S 72.3059 (France)
- DS 2124.1 (Denmark)
- SFS 3653 (Suomi, Finland)
- B.S.I.BS 6658-85 Typ A/FR (GB)
- Snell foundation
- SA 2000
- SA 2005
- SA 2010
- SFI 31.1 (open face type)
- SFI 31.2( closed face/ integral type)
See the general regulations 10.7
The helmet visor should not be darkly tinted and/or severely damaged.
The helmet must be in good condition. A small sun visor on the visor is permitted. The size of the sun visor will be checked by the Technical Inspection Team.
These regulations have been translated in part from the NHRA Street Regulations. The NHRA rulebook should be viewed as a guide.
In the event of technical conflicts, refer to the original NHRA Sport Compact rules (not legal).
APPENDIX
Article 91
Windscreens of cars, vans, and buses with a maximum permissible mass not exceeding 3,500 kg and such vehicles shall not be damaged or discolored in the areas specified in Article 92, as specified in Articles 93 and 94.
Article 92
1. The windshield is divided into the following three imaginary planes, as shown in
Figure 18:
a. immediately in front of the driver’s direct line of sight: this is the part of the windshield that the driver’s seat, the size of the windshield
projection plane with a horizontal length of 0.30 m and a vertical side of 0.20 m;
b. just in front of the indirect field of vision, which is formed as follows
: the direct view is opposite the center of the windshield mirror on the right side of the windshield area. The resulting area is the indirect field of vision;
c. the side area: this is the remaining part of the windshield.
2. The center of the first paragraph under a projected plane must coincide with
the intersection:
a. The imaginary vertical line drawn on the windshield from the director’s seating position
through the center of the steering wheel, and
b. The center of the wiper blade’s orbit on the windshield or a central horizontal tangent of the wiper’s orbit, as shown in Figure 19.
‐ A equals B
‐ M = center point of the projection plane to the head
‐ H = height of the projected head (depending on the angle of the windshield)
Article 93
1. In the area directly visible, the following damage may be present with regard to Article 94:
a. individual cracks of any length
b. superficial scratches no more than 5 mm wide;
c. damage or discoloration whose dimensions are such that an imaginary circle drawn around the entire damage or discoloration has a diameter of no more than 20 mm.
2. In the area not directly visible, the following damage may be present with regard to Article 94:
2. With regard to indirect visibility, without prejudice to Article 94, the following damage or discoloration may be present:
a. individual cracks of any length,
b. superficial scratches no more than 5 mm wide
c. damage or discoloration whose dimensions are such that an imaginary circle drawn around the entire damage or discoloration has a diameter of no more than 50 mm.
3. The first and second paragraphs refer to individual cracks. Cracks mean that the visual fields have no branching between the start and end points, as shown in Figure 20.
4. Damage or discoloration may be present on the side surface.
5. If damage or discoloration continues in the various areas of the window to be assessed, only the part of the damage or discoloration that is present in the area to be assessed shall be taken into account.
6. If the window is damaged or discolored in more than one area, the damage or discoloration shall be assessed separately for each area.
Article 94
The windshield may have several bubbles, discolorations, or damage.
In terms of dimensions, these items must comply with Article 93, provided that the driver’s visibility is not impaired.
The windshield must be made of tempered glass.
Article 95
The requirements in this section shall be checked:
a. by visual inspection;
b. in case of doubt, by measurement with a measuring device with sufficient range.
