INLINERS INTERNATIONAL
Drag Competition Class Rules
(March 24, 2008)
GENERAL REGULATIONS
- Driver must be a club member in good standing.
- Line locks permitted.
- Trans break permitted.
- Shift light and play back tech allowed. No data recording devices (mechanical or electronic) allowed.
- Only one high-end rev limiter allowed.
- Nitrous oxide allowed only when activated by a single pole switch, either by pedal or push button. No electronic or mechanical timers allowed.
- When power add-ons (turbo, superchargers, NOS) are allowed in applicable classes, no combined uses permitted.
- Cars will be weighed with 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. 100 lbs maximum, 2 each ½” bolts per 50 lbs.
- Weight, fuel or other infraction of the rules not requiring engine disassembly may be protested without charge.
- Protest 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.
- 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 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.
- 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.
- 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 safety inspection at sanctioned drag strips.
- 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.
15. General inquiries and assistance in interpreting regulations and/or classifying vehicles and submission of record setting information, to include an official weight slip and time slip marked with class record set, should be sent to the Inliners Racing Director.
CLASSES
Stock/Super Stock
- Cars will be classified by car weight (less driver) divided by advertised brake horsepower (bhp)
- There are 8 classes for American made cars
Stock (Early Engine) Super Stock (Late Engine)
Class A/S – 0 to 22.5 lbs/bhp Class SS/A – 0 to 22.5 lbs/bhp
Class B/S – 22.6 to 28.5 lbs/bhp Class SS/B – 22.6 to 28.5 lbs/bhp
Class C/S – 28.6 and up lbs/bhp Class SS/C – 28.6 and up lbs/bhp
Class D/S – 4 cyl stock head Class SS/D – 4 cyl stock head
- Must run service station pump gas, with no octane boosters or additives.
- Each car’s engine must be of the specific type and model as the car in which it is being run.
- Generators and fans must be connected and in operation.
- Cylinders may be bored a maximum of .060 of an inch larger than the standard bore size.
- Dual exhaust pipes with mufflers will be permitted.
- Cast iron headers such as Fentons, Nicsons or split manifold type are permissible but must be routed through mufflers. No tube-type headers will be allowed.
- Cars must run full upholstery and may not be gutted.
- Convertibles must run with the top up and may be chopped a maximum of four inches.
- Drag slicks will not be allowed in this class.
- 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.
- Engine modifications other than standard production equipment will automatically advance car into the gas coupe/sedan class.
- Cars entered in this class are subject to engine displacement and other protests as outlined in general regulations.
#1 Modified Coupe/Sedan Early Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” - 5 lbs/cu. in. minimum
“S” Head
“A” Head
Class “B” and “BB” - 7.6 lbs/cu. in. minimum
“S” Head
“A” Head
Class “C” and “CC” - 10.1 lbs/cu. in. minimum
“S” Head
“A” Head
Class “D” and “DD” - 12.1 lbs/cu. in. minimum
“S” Head
“A” Head
Class “E” and “EE” - 5 lbs/cu. in. minimum, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- Must run gasoline. Octane boosters or racing gas is permitted.
- Must have a coupe or sedan body produced by an automotive manufacturer. Aftermarket fiberglass or plastic bodies are permitted. Top may be chopped a maximum of four inches. Must have stock shaped hood, fenders and grill.
- Wipers optional.
- Exhaust system optional.
- Headlights need not work.
- Plexiglas and lexan windows OK, window controls optional
- One tail light required for night racing.
- Interior may not be gutted. Must have minimum upholstery.
- Open headers permitted for racing.
- Must have full transmission. Quick change rear ends permitted.
- Maximum 10% engine setback.
- Drag slicks are allowed. Wheel wells must be radiused for tires.
- Nitrous oxide not permitted.
#1A Gas Coupe/Sedan Late Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” - 5 lbs/cu. in. minimum
“S” Head
“A” Head
Class “B” and “BB” - 7.6 lbs/cu. in. minimum
“S” Head
“A” Head
Class “C” and “CC” - 10.1 lbs/cu. in. minimum
“S” Head
“A” Head
Class “D” and “DD” - 12.1 lbs/cu. in. minimum
“S” Head
“A” Head
Class “E” and “EE” - 5 lbs/cu. in. minimum, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- Must run gasoline. Octane boosters or racing gas is permitted.
- Must have a coupe or sedan body produced by an automotive manufacturer. Aftermarket fiberglass or plastic bodies are permitted. Top may be chopped a maximum of four inches. Must have stock shaped hood, fenders and grill.
- Wipers optional.
- Exhaust system optional.
- Headlights need not work.
- Plexiglas and lexan windows OK, window controls optional
- One tail light required for night racing.
- Interior may not be gutted. Must have minimum upholstery.
- Open headers permitted for racing.
- Must have full transmission. Quick change rear ends permitted.
- Maximum 10% engine setback.
- Drag slicks are allowed. Wheel wells must be radiused for tires.
- Nitrous oxide not permitted.
#2 Comp Coupe/Sedan Early Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” - 4 lbs/cu. in. minimum
“S” Head
“A” Head
Class “B” and “BB” - 6 lbs/cu. in. minimum
“S” Head
“A” Head
Class “C” and “CC” - 8 lbs/cu. in. minimum
“S” Head
“A” Head
Class “D” and “DD” - 10 lbs/cu. in. minimum
“S” Head
“A” Head
Class “E” and “EE” - 4 lbs/cu. in. minimum, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- May run gas, methanol, aviation gas, racing gas, additives OK.
- Must have coupe or sedan body, fenders and upholstery optional, plastic, fiberglass, carbonfiber bodies OK.
- Original size grill shell required, radiator optional.
- Tops may be chopped and/or bodies channeled, but not to exceed a maximum of six inches total height reduction.
- May use standard or automatic trans, quick change or locked rear ends OK.
- Maximum 25% engine set back, measured from center of spindle to #1 spark plug.
- Drag slicks permitted.
- Nitrous oxide not permitted.
#2A Altered Coupe/Sedan Late Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” - 4 lbs/cu. in. minimum
“S” Head
“A” Head
Class “B” and “BB” - 6 lbs/cu. in. minimum
“S” Head
“A” Head
Class “C” and “CC” - 8 lbs/cu. in. minimum
“S” Head
“A” Head
Class “D” and “DD” - 10 lbs/cu. in. minimum
“S” Head
“A” Head
Class “E” and “EE” - 4 lbs/cu. in. minimum, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- May run gas, methanol, aviation gas, racing gas, additives OK.
- Must have coupe or sedan body, fenders and upholstery optional, plastic, fiberglass, carbonfiber bodies OK.
- Original size grill shell required, radiator optional.
- Tops may be chopped and/or bodies channeled, but not to exceed a maximum of six inches total height reduction.
- May use standard or automatic trans, quick change or locked rear ends OK.
- Maximum 25% engine set back, measured from center of spindle to #1 spark plug.
- Drag slicks permitted.
- Nitrous oxide not permitted.
#3 Modified Street Roadster Early Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” – 5.0 - 7.5 lbs/cu. in.
“S” Head
“A” Head
Class “B” and “BB” - 7.6 - 10 lbs/cu. in.
“S” Head
“A” Head
Class “C” and “CC” - 10.1 lbs/cu. in. and up
“S” Head
“A” Head
Class “D” and “DD” – 5 lbs/cu. in. and up, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- Must be equipped with a roadster type body, cannot be altered in either height, width, length or contour.
- May run pump gas, methanol, aviation gas, additives OK.
- Must have all equipment to be street legal, all four fenders and head lights required. Windshield may be removed for competition at owner’s option.
- Must have street legal exhaust, open exhaust permitted for competition.
- Must be equipped with production type radiator shell, must be as large in frontal area as original grill or shell, mounted in conventional location.
- Interior may not be gutted, must run full upholstery.
- No relocation of engine allowed.
- Drag slicks allowed in this class.
- Open touring and roadster pickups may run as street roadsters provided they meet the class requirements. Pickup beds must be of standard height and width and a minimum of 36” in length.
- All cars must have an approved roll bar.
- Nitrous oxide not allowed.
#3A Street Roadster Late Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” – 5.0 - 7.5 lbs/cu. in.
“S” Head
“A” Head
Class “B” and “BB” - 7.6 - 10 lbs/cu. in.
“S” Head
“A” Head
Class “C” and “CC” - 10.1 lbs/cu. in. and up
“S” Head
“A” Head
Class “D” and “DD” – 5 lbs/cu. in. and up, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- Must be equipped with a roadster type body, cannot be altered in either height, width, length or contour.
- May run pump gas, methanol, aviation gas, additives OK.
- Must have all equipment to be street legal, all four fenders and head lights required. Windshield may be removed for competition at owner’s option.
- Must have street legal exhaust, open exhaust permitted for competition.
- Must be equipped with production type radiator shell, must be as large in frontal area as original grill or shell, mounted in conventional location.
- Interior may not be gutted, must run full upholstery.
- No relocation of engine allowed.
- Drag slicks allowed in this class.
- Open touring and roadster pickups may run as street roadsters provided they meet the class requirements. Pickup beds must be of standard height and width and a minimum of 36” in length.
- All cars must have an approved roll bar.
- Nitrous oxide not allowed.
#4 Modified Roadster Early Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” – 4.0 - 5.9 lbs/cu. in.
“S” Head
“A” Head
Class “B” and “BB” – 6.0 - 7.9 lbs/cu. in.
“S” Head
“A” Head
Class “C” and “CC” – 8.0 lbs/cu. in. and up
“S” Head
“A” Head
Class “D” and “DD” – 4.0 lbs/cu. in. and up, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- May run pump gas, methanol, aviation gas, racing gas, additives OK.
- Must be equipped with a roadster-type body, plastic, fiberglass, carbonfiber or composite, must have unaltered height, width, length or contour.
- 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.
- Street equipment and upholstery optional.
- May run standard or automatic transmission, quick change or locked rear ends OK.
- Maximum engine setback 25%, measured from C/L of spindle to #1 spark plug.
- Drag slicks permitted in this class.
- Open touring and roadster pickups may run as roadsters provided they meet the class requirements. Pickup beds must be of standard height and a minimum of 36” in length.
- All cars in this class must have an approved roll bar.
- Nitrous oxide not allowed.
#4A Roadster Late Engine
- Cars will be classified by car weight divided by cubic inches
- There are 4 records in each class
Class “A” and “AA” – 4.0 - 5.9 lbs/cu. in.
“S” Head
“A” Head
Class “B” and “BB” – 6.0 - 7.9 lbs/cu. in.
“S” Head
“A” Head
Class “C” and “CC” – 8.0 lbs/cu. in. and up
“S” Head
“A” Head
Class “D” and “DD” – 4.0 lbs/cu. in. and up, for 4 cyl and flathead 6 cyl
“S” Head
“A” Head
- May run pump gas, methanol, aviation gas, racing gas, additives OK.
- Must be equipped with a roadster-type body, plastic, fiberglass, carbonfiber or composite, must have unaltered height, width, length or contour.
- 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.
- Street equipment and upholstery optional.
- May run standard or automatic transmission, quick change or locked rear ends OK.
- Maximum engine setback 25%, measured from C/L of spindle to #1 spark plug.
- Drag slicks permitted in this class.
- Open touring and roadster pickups may run as roadsters provided they meet the class requirements. Pickup beds must be of standard height and a minimum of 36” in length.
- All cars in this class must have an approved roll bar.
- Nitrous oxide not allowed.
#5 Dragster Early Engine
T/D: Any head/fuel blower/turbo open
A/D-A: Nitro (any head)
B/D-S: Nitro/stock head
C/D-S: Gas/alky (stock head)
D/D-S: 280 cu. in. gas/alky (stock head)
E/D-S: Gas/alky
E/D-S: Nitro
E/D-A: Gas/Alky
E/D-A: Nitro
#6 Dragster Late Engine
T/D: Any head/fuel blower/turbo # of engines
A/D-A: Nitro (any head)
B/D-S: Nitro/stock head
C/D-S: Gas/alky (stock head)
D/D-S: 260 cu. in. gas/alky (stock head)
E/D-S: Gas/alky
E/D-S: Nitro
E/D-A: Gas/alky
E/D-A: Nitro
#7 Fuel Altered Nitrous Oxide Class
Use altered coupe/sedan rules and weight breaks
A/FA: 4 lbs/cu. in. min.
B/FA: 6 lbs/cu. in. min.
C/FA: 8 lbs/cu. in. min.
D/FA: 4 lbs/cu. in. min.
- 4 and 6 cylinder stock L head.
- May run nitrous with gas or alky.
- May run nitro with gas or alky.
- Any induction system legal.
DEFINITION OF TERMS
12 Port: The early (1950s style) cross flow 12 port heads manufactured for 216-235-261 Chevrolet engines and 270-302 GMC engines. Includes: Wayne Chevrolet, Wayne GMC, Horning-Fisher GMC, Fisher GMC, Howard GMC, Algon GMC or reproductions of aforementioned heads; aluminum or cast iron.
Early Engine: Domestic and foreign engines generally designed and produced before 1960 by major automotive manufacturers. Aftermarket blocks are not allowed and will be classified as a Late Engine. Approved engines are listed in Table 1. Engines can be added to the list by petitioning the Drag Race Rules Committee.
Late Engine: Domestic and foreign engines generally designed and produced starting in the early 1960’s by major automotive manufacturers. Aftermarket blocks and heads based on these engines are also included. Approved engines are listed in Table 2. Engines can be added to the list by petitioning the Drag Race Rules Committee.
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.
Contemporary Engine: Domestic and foreign engines generally designed and produced starting in the 1980’s by major automotive manufacturers and not designated as Early or Late engines.
Nostalgia Classes: Body styles generally associated with Early and Late engines. Chassis must be front engine/rear drive. Engine modifications are restricted to older technology levels. Computers are allowed for data collection only. Electronic and crank trigger ignition systems are allowed.
Contemporary Class: All vehicles that do not fit into the Nostalgia Classes
Power Adders:
- Supercharger – permitted in all classes
- Turbocharger – permitted in all classes
- Alcohol/Nitro fuel – permitted in specific classes
- Nitrous Oxide (NOS) – only permitted in fuel altered class
Stock Head: Any cylinder head which was original equipment manufactured (OEM) for a particular engine
Specialty Head: Any aftermarket, export, fabricated or original equipment manufactured (OEM) cylinder head installed on a block for which it was not designed (e.g., Chevy small block V-8 cylinder head installed on a 153 cu. in. Chevy 4 cylinder block)
“S” Head: Stock head, any modification
“A” Head: Aftermarket and contemporary head, any modification
Flathead: Valves in block
F-head: One valve in head, one valve in block
OHV: Overhead valve
SOHC: Single overhead cam
DOHC: Dual overhead cam
RULES COMMITTEE
Harry Blecha, #661 (Chair/Racing Director)
Bob Corbett, #1654
Jim Hawk, II, #1339
Ray Hedstrom, #5
Greg Koesel, #3261
Larry Page, Jr., #3220
Leo Santucci, #587
Walt Skoczylas, #722
Cliff Tibbetts, #3482
Refer to appropriate sources for Land Speed Racing Rules:
www.scta-bni.org
www.ecta-lsr.com
www.saltflats.com
www.dlra.org.au (Australia)
Table 1 Early Engines
Manufacturer |
Cubic Inches |
Year(s) |
Valve Layout |
Buick |
248, 263, 320 |
thru 1953 |
OHV |
Chevy |
216, 235, 261 |
thru 1962 |
OHV |
Chrysler |
250, 265, 323 |
thru 1954 |
FH |
DeSoto |
236, 250 |
thru 1954 |
FH |
Dodge |
230 |
thru 1959 |
FH |
Ford |
Model A, B, C, 226 |
thru 1951 |
FH |
Ford |
215, 223 |
thru 1961 |
OHV |
GMC |
228, 236, 248, 270, 302 |
thru 1962 |
OHV |
Hudson |
202, 232, 254, 262, 308 |
thru 1956 |
FH |
Nash/Rambler |
172, 184, 196 |
thru 1955 |
FH |
Nash/Rambler |
196, 235, 253 |
thru 1958 |
OHV |
Olds |
257 |
thru 1950 |
FH |
Packard |
288, 327, 356, 359 |
thru 1954 |
FH |
Plymouth |
218, 230 |
thru 1959 |
FH |
Pontiac |
239, 248, 268 |
thru 1954 |
FH |
Studebaker |
169, 185, 245 |
thru 1958 |
FH |
Willys/Jeep |
134, 148, 161, 226 |
thru 1958 |
FH |
Willys/Jeep |
134, 161 |
thru 1958 |
F-head |
Table 2 Late Engines
Manufacturer |
Cubic Inches |
Year(s) |
Valve Layout |
AMC |
232, 258 |
starting 1963 |
OHV |
Chevy |
194, 230, 250 292 |
starting 1963 |
OHV |
Ford |
144, 170, 240, 300 |
starting 1960 |
OHV |
Jeep |
230 |
1963-1967 |
OHC |
Mopar |
170, 225 |
starting 1960 |
OHV |
Pontiac |
195 |
starting 1961 |
OHV |
Pontiac |
215 |
starting 1964 |
OHC |
Studebaker |
170 |
starting 1961 |
OHV |