Inliners International’s

DRAG COMPETITION CLASS RULES

General Regulations

 

  1. Cars will be weighed less driver, ready-to-run. Any weight added must be firmly attached to the car. Drums or similar containers filled with liquid may not be used as ballast. Weight may neither be added nor reduced after a car has been officially classified.
  2. Weight, fuel or other infraction of the rules, not requiring engine disassembly, may be protested, without charge.
  3. Protests on engine displacement must be made in writing and accompanied by a protest fee of $100 for overhead valve engines and $75 for flatheads. Protest fee will be forfeited to the car owner if the protested car is found to be legal for its proper class. If the car is found to be illegal, the owner of the protested car will be subject to disciplinary action by the Drag Committee.
  4. Engine Displacement checks will be performed by the tech committee personnel only to the extent of measuring the bore and stroke. A protested engine must be disassembled for inspection and and reassembled after inspection by the car owner and/or his pit crew. Refusal to disassemble an engine upon official protest request may result in suspension of the car owner from further participation in future club-sponsored activities.
  5. Cars will be classified according to the aforementioned requirements as well as general compliance to the "spirit of the rules". The decision of the Inliner Tech Committee will be final on all class placements.
  6. Each car entered will be required to have a safety belt for the driver. Helmets will also be required for all classes other than the stock classes. All open cars are required to have roll bars. Steering mechanism, brake systems, and general construction of cars will be checked visually by the tech Committee. All cars must also pass N.D.R.A. inspection at N.D.R.A. meets.
  7. Immediately after making a record run, a car will be required to drive to the Inline inspection area to be checked for compliance with class rules and be re-weighed. Refusal to do so will result in loss of record.

 

DEFINITION OF TERMS

 

STOCK HEAD Any head which was (OEM) original equipment manufactured for a particular engine.

12 PORT The early (1950’s style) crossflow 12 port heads manufactured for 216-235-261 Chevrolet engines and 270-302 GMC engines. Includes: Wayne Chevrolet, Wayne GMC, Horning GMC, Horning-Fisher GMC, Fisher GMC, Howard GMC, Algon GMC or reproductions of aforementioned heads; aluminum or cast iron.

LATE Modern 230-250-292 cu. in. Chevrolet stock heads or modified versions of same. Also includes special late 12 port heads such as "Duggan", "Skinner", or special 12 port heads fabricated from V/8 heads.

GAS CLASSES

STOCK CAR (S)

  1. There shall be three Eight classes for American made cars, classified according to total car weight (less driver) divided by advertised brake horsepower.

    2. Designation: A/S, B/S, C/S and D/S, preceded by car number.

    Stock

    Early Engine – OHV through 1962

    Class ‘A/S’ – 0 to 22.5 lbs/b.h.p.

    Class ‘B/S’ – 22.6 to 28.5 lbs/b.h.p.

    Class ‘C/S’ – 28.6 and up lbs/b.h.p

    Class ‘D/S’ – 4 Cyl and Flathead

    Super Stock

    Late Engine – OHV 1963 through current

    Class ‘SS/A’ – 0 to 22.5 lbs/b.h.p.

    Class ‘SS/B’ – 22.6 to 28.5 lbs/b.h.p.

    Class ‘SS/C’ – 28.6 and up lbs/b.h.p

    Class ‘SS/D’ – 4 Cyl and Flathead
  2. Must run service station pump gas, with no octane boosters or additives.
  3. Each car’s engine must be of the specific type and model as the car in which it is being run.
  4. Generators and fans must be connected and in operation.
  5. Cylinders may be bored a maximum of .060 of an inch larger than the standard bore size.
  6. Dual exhaust pipes, with mufflers, will be permitted,
  7. Cast-iron headers, such as Fentons, Nicsons, or split-manifold type are permissible but exhaust must be routed through mufflers. No tube-type headers willl be allowed.
  8. Cars must run full upholstery and may not be gutted.
  9. Convertibles must run with the top up, and may be chopped a maximum of four inches.
  10. Drag slicks will not be allowed in this class.
  11. Moderately customized cars may run in this class at the discretion of the Tech Committee, provided the engine meets all the requirements of the Stock Car section.
  12. Engine modifications other than standard production equipment will automatically advance car into the Gas Coupe/Sedan Class.
  13. Cars entered in this class are subject to engine displacement and other protests as outlined in General Regulations.

GAS COUPE/SEDAN (G)
  1. There shall be four classes in this section, classified according to car weight divided by total cubic inches engine displacement.

Designation: A/G, B/G, C/G, or D/G, preceded by car number.

Class ‘A" – Flathead: 0 to 8.16 lbs./cu. in.

Stock Head: 0 to 8.59 lbs./cu.in.

    1. Port: 0 to 9.29 lbs./cu. in

Late: 0 to 9.59 lbs./cu.in.

Class ‘B" – Flathead: 8.17 to 10.06 lbs./cu. in.

Stock Head: 8.6 to 10.59 lbs./cu.in.

12 Port: 9.3 to 11.39 lbs./cu. in.

Late: 9.6 to 11.89 lbs./cu. in

Class ‘C" – Flathead: 10.07 to 11.96 lbs./cu. in.

Stock Head: 10.6 to 12.59 lbs./cu.in.

12 Port 11.4 to 13.59 lbs./cu. in.

Late 11.9 to 14.0 lbs./cu. in

Class ‘D" – Flathead: 11.97 and up lbs./cu. in.

Stock Head: 12.6 and up lbs./cu.in.

12 Port: 13.6 and up lbs./cu.in.

Late: 14.1 and up lbs./cu. in

 

  1. Must run gasoline. Octane boosters or racing gas is permitted.
  2. Must have a coupe or sedan body produced by an automotive manufacturer. After market-fiberglass or plastic bodies are not permitted in this class. Top may be chopped a maximum of four inches. Must have four production-type fenders (steel) hood and grill.
  3. Interiors may not be gutted. Must run full upholstery.
  4. Must have mufflers suitable for street. Open headers will be permitted for competition.
  5. Must have full transmission. Quick change rear ends are permissible.
  6. No relocation of engines will be allowed.
  7. Must have legal equipment required for operation of street and must be registered for current year’s operation.
  8. Drag slicks are allowed but must fit within stock fender wells.
  9. Cars equipped with superchargers will be advanced to the next higher class.
  10. Turbo chargers or nitrous oxide are not permitted.

ALTERED COUPE/SEDAN (A)
  1. There shall be three eight classes in this section, classified according to car weight divided by total cubic inches engine displacement.

    2. Designation: A/A, B/A, C/A, preceded by car number

    No Superchargers, turbochargers, or nitrous

    Class ‘A" – Flathead: 0 to 7.21 lbs./cu. in.

    Stock Head: 0 to 7.59 lbs./cu.in.

    12 Port: 0 to 8.19 lbs./cu.in

    Late: 0 to 8.49 lbs./cu.in.

    Class ‘B" – Flathead: 7.22 to 9.11 lbs./cu. in.

    Stock Head: 7.60 to 9.59 lbs./cu.in.

    12 Port: 8.20 to 10.29 lbs./cu. in.

    Late: 8.50 to 10.69 lbs./cu. in

    Class ‘C" – Flathead: 9.12 and up lbs./cu. in.

    Stock Head: 9.60 and up lbs./cu.in.

    12 Port: 10.3 and up lbs./cu.in.

    Late: 10.7 and up lbs./cu. in

    Class ‘D’ – US built 4 cylinder

    Following altered classes WILL be permitted to run superchargers, turbochargers, or nitrous oxide:

    Class ‘AA/A" –   Flathead: 0 to 7.21 lbs./cu. in.

                            Stock Head: 0 to 7.59 lbs./cu.in.

                            12 Port: 0 to 8.19 lbs./cu.in

                            Late: 0 to 8.49 lbs./cu.in.

                               Class ‘BB/A" – Flathead: 7.22 to 9.11 lbs./cu. in.

                            Stock Head: 7.60 to 9.59 lbs./cu.in.

                            12 Port: 8.20 to 10.29 lbs./cu. in.

                            Late: 8.50 to 10.69 lbs./cu. in

                            Class ‘CC/A" – Flathead: 9.12 and up lbs./cu. in.

                            Stock Head: 9.60 and up lbs./cu.in.

        12 Port: 10.3 and up lbs./cu.in.

        Late: 10.7 and up lbs./cu. in

        Class ‘D’ – US built 4 cylinder

     

  1. May run pump gasoline, Methanol, Aviation gas, racing gas or gasoline with octane booster.
  2. Must have a coupe or sedan body produced by an automotive manufacturer. Fenders and upholstery are optional.
  3. Must be equipped with a production type grill or shell which must be as large in area as original grill or shell. Radiator optional.
  4. Tops may be chopped and/or bodies channeled, but not to exceed a maximum of six inches total height reduction.
  5. May have a standard transmission or an automatic. Quick change and/or locked rear ends are permissible.
  6. Engine may be moved back a maximum of 25% of the wheelbase, as measured from the centerline of the front spindles to the center of the front spark plug hole.
    7.
  7. Cars equipped with superchargers will be advanced to the next higher class.
  8. Turbochargers or nitrous oxide will not be allowed.

STREET ROADSTERS (SR)

  1. There shall be three eight classes in this section, classified according to total car weight divided by total cubic inches of engine displacement.

    2. Designation: A/SR, B/SR, C/SR, preceded by car number

    No Superchargers, turbochargers, or nitrous

    Class ‘A’ - Stock Head: 0 to 7.59 lbs./cu.in.

    12 Port: 0 to 8.19 lbs./cu.in

    Late: 0 to 8.49 lbs./cu.in.

    Class ‘B" – Stock Head: 7.60 to 9.59 lbs./cu.in.

    12 Port: 8.20 to 10.29 lbs./cu. in.

    Late: 8.50 to 10.69 lbs./cu. in

    Class ‘C’ – Stock Head: 9.60 and up lbs./cu.in.

    12 Port: 10.3 and up lbs./cu.in.

    Late: 10.7 and up lbs./cu. in

    Class ‘D’ – US built 4 cylinder, flathead

     

    Following Roadster classes WILL  be permitted to run superchargers, turbochargers, or nitrous oxide:

    Class ‘AA/SR’ - Stock Head: 0 to 7.59 lbs./cu.in.

    12 Port: 0 to 8.19 lbs./cu.in

    Late: 0 to 8.49 lbs./cu.in.

    Class ‘BB/SR" – Stock Head: 7.60 to 9.59 lbs./cu.in.

    12 Port: 8.20 to 10.29 lbs./cu. in.

    Late: 8.50 to 10.69 lbs./cu. in

    Class ‘CC/SR’ – Stock Head: 9.60 and up lbs./cu.in.

    12 Port: 10.3 and up lbs./cu.in.

    Late: 10.7 and up lbs./cu. in

    Class ‘DD’ – US built 4 cylinder, flathead

     
  2. Must be equipped with a roadster type body produced by an automotive manufacturer. Body cannot be altered in either height, width, length or contour.
    3.
  3. Must run gasoline. Octane boosters or racing gas permitted. May run pump gasoline, Methanol, Aviation gas, racing gas or gasoline with octane booster.
  4. Must have legal equipment required for running on the street, including four fenders (steel) and headlights. Windshields may be removed for competition at owner’s option.
  5. Must have mufflers suitable for street use. Open headers will be permitted for competition.
  6. Must be equipped with a production type radiator shell, which must be as large in area as original grill or shell, mounted in conventional forward location.
  7. Interior may not be gutted. Must run full upholstery
  8. No relocation of engines will be allowed.
  9. Must have full transmission. Quick change rear ends are permissible.
  10. Drag slicks will be allowed in this class. Fender wells must not be modified in any way to accommodate tires.
  11. Open tourings and roadster pickups may run as Street Roadsters provided they meet the class requirements. Pick-up beds must be of standard height and width and a minimum of 36" in length.
  12. All open cars must have an approved roll bar.
    13.
  13. Cars equipped with superchargers will be advanced to the next higher class.
  14. Turbochargers or nitrous oxide will not be allowed.

 

 

ROADSTERS (R)

  1. There shall be three eight classes in this section, classified according to total car weight divided by total cubic inches of engine displacement.

    2. Designation: A/R, B/R, or C/R, preceded by car number

    No Superchargers, turbochargers, or nitrous

     

    Class ‘A’ - Stock Head: 0 to 7.59 lbs./cu.in.

    12 Port: 0 to 8.19 lbs./cu.in

    Late: 0 to 8.49 lbs./cu.in.

    Class ‘B" – Stock Head: 7.60 to 9.59 lbs./cu.in.

    12 Port: 8.20 to 10.29 lbs./cu. in.

    Late: 8.50 to 10.69 lbs./cu. in

    Class ‘C’ – Stock Head: 9.60 and up lbs./cu.in.

    12 Port: 10.3 and up lbs./cu.in.

    Late: 10.7 and up lbs./cu. in

    Class ‘D’ – US built 4 cylinder, flathead

     

     

  2. May run pump gasoline, methanol, Aviation gas, racing gas or gasoline with octane booster.