Rule Updates

 IHRA Rulebook Revisions and Clarifications

 

6/22/2022

p. 21 Junior Dragster

Engine: Add Huddleston Performance Magnum OHV Engine to the list.

3/17/2021

p. 12 Team Finals Champions Photos

The Division 5 team Finals Champion Photo is Incorrect.  The correct Photo is shown below.

 Division 5 Thunder - US 131 Motorsports Park  

  

1/8/2020

 

CLICK HERE to view IHRA Junior Dragster License Identification Decal Program

 

4/29/19

p. 39 Helmet

Add the following: All open bodied entries must use a closed face helmet.  Delete the line stating; Drivers of any open bodied car wearing and open face helmet must wear protective goggles.

 

p. 15 Motorcyle - p. 16 Snowmobile - p. 17 ATV - p. 20 Jr Dragster:

All entries must use a closed face helmet.

 

p. 27 0 - 11.49 1/4 and 0 - 7.49 1/8  

Helmet

All open bodied entries must use a full face helmet.

 

4/9/19

 

p. 41 Roll Cage

Replace the third paragraph with the following:

Chrome plating of roll cage prohibited on all entries running 7.50 or quicker 1/4 mile, or on entries that want a certification that is within that respective SFI specs E.T. range.  A dash bar is mandatory if the OEM firewall has been modified in excess of 1 square foot for transmission removal. Minimum specifications: 1-1/4” x .058cm, or 1-1/4” x .118ms.

 

2/1/19

 

p.18 Teen Championship Racing

Add the following to the the first paragraph 2nd sentence.  If a compeititor obtains their state drivers licnese after they have started their TCR  racing season, they may finish the season in the TCR program. 

 

1/16/19

 

p. 13  Team Finals Champion Photos

The Divison 9 Raiders Champion Photo and facility name is incorrect.  The champion for the 2018 Division 9 Raiders was Darlington Dragway.

 

Division 9 Raiders Champions - Darlington Dragway

 

 

12/21/18 for 2019 Rulebook

 

p. 32 General Regulations - Cooling System

Replace the section with the following:

All cooling systems must be installed in stock location for body style used. Front engine dragsters must have the system installed in front of the engine.  Rear engine dragsters with radiator mounted in front of engine must install a deflector plate between the rollcage and the engine.  The deflector plate must be installed from framerail to framerail and extend above the top of the radiator.

 

 

6/21/18

p 15. Sportsman Motorcycle rider Requirements (Section 2)

Add the following to the section: Kevlar jackets are also permited in the class.

 

3/26/18 

 

p. 53 General Regulations - Co-Riders

Replace the section with the following: 

Co-Riders allowed in vehicles running 14.00 (8.75 1/8) and slower. Co-Rider must be a minimum of 16 years of age.  Rider must comply with the same safety guidelines as the driver. 

 

3/21/18

 

p. 15 Sportsman Motorcycle

Replace the first sentence in number 7 with the following:

Nitrous Oxide permitted on all entries and must be installed as per manufactures guidelines and include all safety components.

 

p. 29 Hood

Replace the word Mandatory with See General Regulations

 

p. 40 Nitrous Oxide Injection System

Replace the section with the following:

Only systems meeting IHRA approval may be run. All bottle relief valves must have bulkhead fitting on tank. All bottles must be securely mounted, stamped with minimum Dot -1800 pound rating. Nitrous Oxide bottle(s) located in driver compartment must be equipped with a relief valve and vented outside of the drivers compartment. Nitrous Oxide bottles located in the trunk or rear of the entry must be equipped with a relief valve and vented outside of the drivers compartment or be completely isolated from the drivers compartment by a firewall that is properly sealed to prevent gas from entering the drivers compartment. System must be commercially available and installed per manufacturers recommendations. Nitrous Oxide is prohibited from being in any other pressurized container on any entry other than a manufacturer’s nitrous bottle. The system must utilize all manufacturers safety components. The use of any commercially available thermostatically controlled bottle warmer is accepted. The use of any other method of externally heating nitrous bottles is prohibited.

2/27/18

 

p.19 Street Legal

Replace the section with the following:

This group is limited to any 2008 or newer foreign or domestic, production type automobile or truck with unaltered OEM safety equipment that is street driven with proof of registration and valid license plates. OEM tires and wheels are not mandatory, however all tires must be DOT approved models. These vehicles are limited to street events, test & tune and select import events. Competition in facilities normal weekly et bracket series under these parameters is prohibited.

These vehicles may run provided all of the criteria listed within this section are verified prior to participation.

2008 OEM model year and newer production cars running 10.00 1/4 and 6.50 1/8 do not have to meet the requirements and specifications for the Summit ET safety rules except for the following: Convertibles and T-top entries must meet the minimum specifications listed in the ET bracket section for roll bar and roll cage
requirement. Vehicles must pass all state highway safety requirements in which the vehicle is registered prior to acceptance.

The vehicles OEM installed anti-lock brakes, airbag functions and seat belts as well as all other OEM safety related systems must be functional as per manufacturers specifications at all times.

Co-Riders 18 years of age or older permitted 11.00 and slower 1/4 mile and 7.00 and slower 1/8 mile.

If a Competitor wishes to have a Co-Rider then both the Competitor and Co-rider must be 18 years or older.  All Co-Riders must utilize helmet and protective clothing requirements as per the minimum specifications outlined in the 2018 rulebook under ET bracket section. All competitors and co-riders are prohibited from wearing shorts, tank tops or bare torsos or legs while competing. Co-riders are required to sign the event release and waiver and be wristbanded by a track official prior to making a run.

 

 

8/23/17

p. 60 Street Legal and 59 TCR
Add the following at the end of the section: Participants are prohibited from wearing shorts, tank tops that bare torsos or legs while competing.

 

8/15/17

p. 62 Jr Dragster – Engine
Add to the accepted list of aftermarket engines: TRS Race Engine

 

4/17/17

p. 61 Jr Dragster – Restraint System
Add to the First Sentence: A 16.1 or 16.2 certified 5 point minimum, 1 ¾” wide minimum driver restraint system mandatory.

 

3/20/17

p. 24 Super Stock /GT – Roll Bar, Roll Cage

Replace the section with the following: Roll Cage mandatory in GT/A through GT/G, GT AA through GT/GA, FGT/A through FGT/J and on any vehicle running 9.99 or quicker. A minimum of a roll bar required on all other classes.

 

3/13/17

p. 81 License
Add to the end of the 4th Paragraph: An inactive license is defined as any racing member that has not utilized their competition license or 3 calendar years.

 

 

3/6/17

p. 2  Phone number on top of page

The area code for the main office should be 561 not 560.   The number should read (561) 337 3001  

 

p. 72 Brakes

Replace the last Sentence of the section with the following: Secondary braking systems permitted.  Automated braking systems prohibited.  Brake operation must be a direct function of the drive. Electronics, pneumatics or any other device may not assist of affect brake operation. 

2/13/17

p. 98 Championship Points System Chart

The number for a 6 round event should be 122

 

2/9/17

p. 14 Top Dragster – Minimum Weight

Add the following to the end of the section: 4 cylinder supercharged or Turbocharged – 1,450 lbs

p. 64 Junior Dragster – Data Recorders

Replace the section with the following: Permitted. May be utilized to record engine RPM, cylinder head, exhaust temperature and jack shaft sensor data. The recorder may not activate any function on the car. No sensor of any type may be used on the front wheels or spindles. Data recorders must be activated by a separate switch. The units may not display any information to the driver or remote location during the run. A tachometer that incorporates download capabilities is classified as a data recorder.

 

1/26/17

p. 13 Top Sportsman - Supercharger

Add the following to the end of the section: OEM-type screw superchargers are permitted do not require a supercharger restraint. Supercharger must have been part of OEM combination with the production engine being utilized. 

 

1/25/17

p. 42 Stock Fuel Injection

The following classes are added to competition structure for 2017 and are reserved for 2008 and newer Chevrolet COPO Dodge Drag Pak and Ford Cobra Jet combinations.

FS/AA - 5.50 to 5.99
FS/A  - 6.00 to 6.49
FS/B  -  6.50 to 6.99
FS/C - 7.00 to 7.49
FS/D - 7.50 to 7.99
FS/E - 8.00 to 8.49
FS/F - 8.50 to 8.99
FS/G - 9.00 to 9.49
FS/H - 9.50 to 9.99
FS/I - 10.00 to 10.49
FS/J - 10.50 to 10.99
FS/K - 11.00 to 11.49
FS/L - 11.50 or more

4A/FI, 3A/FI, AAA/FI, AA/FI, CC/FI, DD/FI, EE/FI, AAA/FIA, AA/FIA, BB/FIA, CC/FIA, DD/FIA, EE/FIA are removed from the list of respective classes in Stock Fuel Injection.

 

1/20/17

p. 23 Super Stock GT- See Adjustments and Additions to Class Breaks

Adjustments to GT CLASSES:

CLASS A - 6.00 to 6.49
CLASS B - 6.50 to 6.99
CLASS C - 7.00 to 7.49
CLASS D - 7.50 to 7.99
CLASS E - 8.00 to 8.49
CLASS F - 8.49 to 8.99
CLASS G - 9.00 to 9.49
CLASS H - 9.50 to 9.99
CLASS I - 10.00 to 10.49
CLASS J - 10.50 to 10.99
CLASS K - 11.00 to 11.49
CLASS L - 11.49 to 11.99
CLASS M - 12.00 to 12.49
CLASS N - 12.50 to 12.99
CLASS O - 13.00 to 13.49
CLASS P - 13.50 to 13.99
CLASS Q - 14.00 or more

The following classes are added to competition structure for 2017 and are reserved for 2008 and newer Chevrolet COPO Dodge Drag Pak and Ford Cobra Jet or their engine combinations.

FGT/A - 6.00 to 6.49
FGT/B - 6.50 to 6.99
FGT/C - 7.00 to 7.49
FGT/D - 7.50 to 7.99
FGT/E - 8.00 to 8.49
FGT/F - 8.50 to 8.99
FGT/G - 9.00 to 9.49
FGT/H - 9.50 to 9.99
FGT/I - 10.00 to 10.49
FGT/J - 10.50 to 10.99
FGT/K - 11.00 to 11.49
FGT/L - 11.50 to 11.99
FGT/M - 12.00 to 12.49
FGT/N - 12.50 or more

p. 17 Super Stock

SS/AAS, SS/BBS, SS/AAA and SS/BBA are removed from the list of respective classes in Super Stock.

The following classes are added to competition structure for 2017 and are reserved for 2008 and newer Chevrolet COPO Dodge Drag Pak and Ford Cobra Jet combinations.

FSS/A - 5.00 to 5.49
FSS/B - 5.50 to 5.99
FSS/C - 6.00 to 6.49
FSS/D - 6.50 to 6.99
FSS/E - 7.00 to 7.49
FSS/F - 7.50 to 7.99
FSS/G - 8.00 to 8.49
FSS/H - 8.50 to 8.99
FSS/I - 9.00 to 9.49
FSS/J - 9.50 to 9.99
FSS/K - 10.00 to 10.99
FSS/L - 11.00 to 11.99
FSS/M - 12.00 or more

p. 42 Stock Fuel Injection 

The following class is added to the Fuel Injection Class Structure.

4A/FI - 5.50 to 5.99

Change class designation from AAA/FI to 3A/FI.

3A/FI - 6.00 to 6.99

 

6/9/16

 

p. 60 Street Legal: Add the following to the end of the first paragraph: OEM tires are not mandatory, however all tires must be DOT approved models. 

 

2/18/16

 

p. 44 and 45 TRANSMISSIONS - AUTOMATIC: Replace the section with the following: Must be stock OEM for horsepower and body style claimed. May not be altered except for addition of aftermarket shift kit, gear set and torque converter.  Manual valve bodies prohibited.

 

The following is a partial list of the changes or clarification made to the 2016 IHRA rulebook.

 

Pure Stock: Theses classes are reserved for model years 2005 and older.  

 

General Regulation Points

 

The Pro-Am event claims structure for 2016 will be the best 5 of 8 events.

 

8/19/15

 

p. 56 Sportsman Motorcycle: Helmet: Add the following to the section: ECE 22.05 models permitted on bikes running 10.00 or slower in the1/4 or 6.50 and slower 1/8 mile. 

5/18/2015

 Add the following the MX classes starting on page 34:

 Class SS/EX: 11.50 or more pounds per cubic inch, naturally aspirated, methanol only, front-wheel-drive only, full-bodied  (Index: 10.95 - 1/4 and 7.05 - 1/8.)  

Class SS/VX: 12.00 or more pounds per cubic inch, naturally aspirated, aircooled, Volkswagen, rear-engine, full-bodied.  (Index: 11.95 - 1/4 and 7.75 - 1/8.)  

BODY

VX class: Full-bodied, rear-engine, Volkswagen. Carbon fiber or fiberglass replacement body pieces permitted. Deck lid mandatory.

FLOOR: Mandatory. EX class: Horizontal portion(s) of floor pan may be removed from behind B-post or roll-cage main-hoop attachment points (whichever is farther rearward) to rear of car. Entire shock/strut tower structure must be retained. Portion of floor removed must be replaced with aluminum or steel, completely sealed. Excessive lightening of unibody structure, i.e., drilling of holes, etc., prohibited.

UPHOLSTERY: EX and VX classes: Upholstery, headliners, carpets, dashboard, etc. optional. Must be equipped with one seat minimum for driver, properly installed. Holes, slots, or other openings in floor and/or firewall prohibited.

CHASSIS

SUSPENSION, FRONT: EX class: Upper mounting point for strut assemblies must be in the factory location. Front and rear sides of strut tower may be “notched” for tire clearance, and area must be refinished with minimum .024-inch steel. Roll-cage tubing may run across top of strut tower and attach to frame horn. Adjustable caster/camber pillow ball mounts are permitted. Lower control arm may be strengthened provided factory mounting points to chassis are maintained. Aftermarket or fabricated lower control arms permitted; must use original mounting points. Lower mounting point for strut assembly may be modified for improved caster or camber. Strut tower braces, lower tie bars, sway bars, and limit straps permitted. Traction bars/devices permitted; must be bolt-on ONLY. All front suspensions must utilize one, and only one, working shock absorber/strut per wheel. Shock/strut must attach to original OEM upper mount and maintain minimum 1-inch travel. VX class: OEM-type suspension and dimensions for model year claimed mandatory. Coilovers, longer spring plates, etc. prohibited. Raising and narrowing permitted.

SUSPENSION, REAR: EX class: Factory-independent rear suspension may be replaced with straight-axle suspension but must retain original mounting points. Strut must mount to original upper mounting point. VX class: OEM-type suspension and dimensions for model year claimed mandatory. Coilovers, longer spring plates, etc. prohibited. Raising and narrowing permitted.

TIRES : VX class: Street-type or drag slicks, maximum 10-inch tread width.

WHEELIE BARS: EX class: Permitted. Maximum length 65 inches from rear bumper

 

ENGINE

 

CAMSHAFT/LIFTERS: VX class: Flat tappet cam with flat tappet lifters mandatory. Maximum lift at the valve 0.630-inch.

CARBURETOR: VX class: Maximum two only, single- or two-barrel downdraft Kadron, Weber, Dellorto, or Empi  carburetors. Maximum 52mm (2.047 inches) throttle bore and 44mm (1.732 inches) venturis.

CYLINDER HEADS: VX class: Stock intake flange Volkswagen-type cylinder heads mandatory. Stud pattern must be in OEM location with OEM dimensions. Studs must be used to mount the manifold to the cylinder head. Welding to increase, or originally filled, manifold flange area permitted. Maximum intake valve head diameter 44.1mm (1.736 inches), maximum exhaust valve head diameter 37.5mm (1.476 inches). Minimum valve stem diameter 5/16-inch. Titanium valves, retainers, and keepers permitted. Steel pushrods mandatory.

ENGINE: EX class: Engine must be from same manufacturer as body. 4- cylinder engine only; all others prohibited. All engine-block and cylinder-head castings must be, or have been, available in a production car or truck from a recognized OEM assembly line with a minimum production run of 5,000 units. Fuel injection permitted. Fuel: methanol only.

VX class: Naturally aspirated, air-cooled, OEM Volkswagen. Maximum engine size 2,444cc (149 cid). Maximum bore diameter 94.1mm (3.705 inches). Cast-iron or steel cylinders and steel connecting rods mandatory. Vacuum pump prohibited. Oil-retention device mandatory; device must extend from midplate rearward past crankshaft pulley and must incorporate a minimum 2-inch-high lip on all sides. Nonflammable, oil-absorbent liner is mandatory inside of device.

ROCKER ARMS: VX class: OEM-style rocker arm mounting and dimensions mandatory. End supports permitted.

 TURBOCHARGERS: Permitted in DX only. Must be no larger than the T04-b or the 300 Series Rotomaster/Garrett, twin 62mm or single 80mm maximum size. Air-to-air or water-to-air intercooler permitted on turbocharged SS/DX vehicles.DRIVETRAIN: 2

DRIVELINE  4

WEIGHT: Minimum weight: 1,700 pounds for 6-cylinder cars; 1,200 pounds for 4-cylinder cars; VX class, 1,600 pounds. All weight minimums are with driver. Cars with fully automatic transmission with converter may remove 100 pounds from regular class weight; may be under posted minimum weight. Cars weighed with driver; class minimum includes driver.

CHASSIS, ALL CARS: EX class: Must retain FWD configuration; rear-drive conversions prohibited. Roll cage mandatory for all cars. Roll cage must be recertified every three years and have serialized sticker affixed to roll cage before participation. Excessive lightening of unibody structure (i.e., drilling of holes, etc.) prohibited. Center driver position prohibited. Driver must be located completely to the left or right of vehicle centerline. Engine must be located in OEM orientation for body used. Conversion from transverse to longitudinal engine orientation prohibited. Wheel tubs, back halfs, tube chassis, etc. permitted.

 WHEELBASE: EX class: Must retain original wheelbase for body used, plus or minus 1 inch. Maximum wheelbase variation from left to right is 1 inch.

 SAFETY EQUIPMENT

 FIRE EXTINGUISHER SYSTEM: EX class: Minimum 5-pound, fire extinguishing system mandatory. System must be divided with one nozzle on driver’s side and one nozzle on engine.DRIVER: 10

PROTECTIVE CLOTHING: Jacket and pants meeting SFI Spec 3.2A/5 mandatory in AX, BX, DX, EX, or any vehicle running 9.99 or quicker. Jacket and pants meeting SFI Spec 3.2A/1 mandatory VX. Gloves and boots/shoes meeting SFI Spec 3.3/1 mandatory in EX. SFI Spec 3.3/1 gloves mandatory in any vehicle running 

 

5/8/15

 

p. 41 and 42 Stock Fuel Injection: Class designations:  Add the following class: DD and EE to the classes for 2008 and later factory muscle cars.

 Update the class break section to the following:

 

                                                            Index                1/4       1/8   

Class DD…….9.00 to 9.99                   DD/FI               11.25  -  7.30    

Class EE…….10.00 to 10.99                EE/FI                11.55  -  7.50

                                         DD/FIA             11.30  -  7.35    

                                                                   EE/FIA             11.60  -  7.55

  

p. 38 STOCK: Cylinder Heads: Add the flowing to the section. Cylinder Head Studs permitted.

  

5/5/15

 

p. 24 TRANSMISSION: Add the following to the section: Manual Transmissions are limited to 5 forward speeds. 

p. 89 THROTTLES: Replace the second to last sentence in the section with the following:  Throttle cables or linkages are permitted in all applications.

 

4/2/15
p. 68 FIRE SYSTEM: Replace the first paragraph of the section with the following: Required on all closed body cars 7.49 or quicker ¼ or 4.49 or quicker 1/8 mile.

 

3/27/15

p. 81 LICENSE:  Replace the first paragraph of the section with the following: Each driver of a vehicle entered in any event conducted at an IHRA sanctioned facility must have a valid State driver’s license beyond a learners permit and a Competition License if mandated by class requirements (except Junior Dragster). This license is subject to inspection at any time. All drivers running 0-9.99 ¼ mile or 0 to 6.39 1/8th mile must obtain an IHRA or accepted competition license.

p. 69 ROLL CAGE / ROLLBAR (0 to 9.99 1/4 or 0 to 6.49 1/8): Replace the section with the following:  Roll cage mandatory on all entries.  On full bodied cars with an unaltered floor and firewall running 6.40 or slower in the 1/8^th mile, a roll bar is permitted in place of roll cage.  All entries running 9.00 or quicker 1/4 mile or 6.00 or quicker 1/8 mile must have a current Chassis Certification. See SFI Specifications and General Regulations.

p. 69 ROLL CAGE / ROLLBAR (10.00 to 11.49 1/4 or 6.50 to 7.49 1/8):   Roll cage is mandatory if entry has an altered floor or firewall, or if vehicle exceeds 135 mph. Roll bar mandatory in all cars (including T-tops) running 10.00 to 11.49 ¼ mile or 6.50 to 7.35 1/8 mile, in convertibles running 11.00 to 13.49 ¼ mile or 7.00 to 8.25 1/8 mile and in all dune-buggy-type vehicles running 12.00 seconds and slower ¼ mile or 7.50 1/8 mile .

  

 2/18/15

 

p. 69 10:00 to 11:49: Helmet: Replace the first sentence with the following:   Replace SN 95 with SN 2000 or newer mandatory.

 

p. 32 -33 Super Stock: Modified Stock and Modified Compact: Replace Pages 32 and 33 of the printed copy of the rulebook with the following.  The online version is correct.

 page 32

EXHAUST SYSTEM: Open exhaust with headers permitted. Tail pipes and/or mufflers optional. Final outlets for open exhausts cannot exceed 4” in diameter. 

MANIFOLD: Any stock or replacement intake manifold permitted.

GASOLINE: Must run gasoline. See General Regulations.

FLEX-PLATE: SFI 29.1 mandatory.

FLYWHEEL, CLUTCH: Stock-type cast iron flywheels and/or pressure plates prohibited. Units meeting SFI Spec. 1.1 required.

FLYWHEEL SHIELD: Flywheel shield meeting SFI Spec 6.1 required on all cars with clutch.

TRANSMISSION: Aftermarket conventional operated 4-speeds allowed. Clutch-assisted automatic transmissions use stick-shift weight break. Functional neutral safety switch mandatory. Lockup converters prohibited. Reverse gear required. Overdrive units prohibited.

TRANSMISSION SHIELD, AUTOMATIC: Transmission shield meeting SFI Spec 4.1required. See General Regulations.

REAR END: Axle retention devices and aftermarket axles mandatory. Any automotive type permitted. “Floater”, ratchet-type (limited slip), or locked accepted.

DRIVER RESTRAINT SYSTEM: Must meet SFI 16.1 within 2 year expiration from date of manufacture.

HELMET: SN-2005 or newer or SFI 31.1, 31.2, 41.1 or 41.2 mandatory. See General Regulations.

MASTER CUTOFF: Master electrical cutoff switch required. Marked “push-off”

ROLL BAR PADDING: Mandatory. SFI Spec. 45.1.

WINDOW NET: An SFI 27.1 net is mandatory.

DELAY BOX/SWITCH: Electronic, mechanical or any other delay device prohibited.

TAIL LIGHTS: A minimum of one functional tail light mandatory.

 

Modified Compact

DESIGNATIONS: SS/AC, SS/BC, SS/CC, SS/DC, SS/EC, SS/FC, followed by car number.

Numbers must be at least 4” high on all 4 windows.

Reserved for cars with originally equipped engines, self-starting and suitable for street use. Body, engine, drivetrain, chassis, etc., may not be altered, modified or relocated except as noted in Class Requirements. Push starts and tow cars prohibited. Class determined by total car weight divided by total cubic inches engine displacement.

 

CLASSES LBS. PER CUBIC INCH

Class AC .............15.00 to 16.49 Ibs. per cubic inch, includes rotary engines.

Class BC .............16.50 or more pounds per cubic inch

Class CC .............18.50 or more Ibs. per cubic inch, American production, front engine.

Class DC .............15.00 to 17.99 Ibs. per cubic inch, 4-or 6-cyl. front wheel drive only.

Class EC .............18.00 or more Ibs. per cubic inch, 4-cyl. front wheel drive only.

Class FC For 4-cyl. American built cars with a maximum displacement of 165 cu. in. Minimum weight with driver is 2,400 Ibs. for automatic and 2,500 for manual transmissions.

Requirements and Specifications for compact classes are the same as those for Super Stock classes, with the following exceptions.

BODY: Must be factory-produced passenger car. Customizing, chopping, channeling or sectioning prohibited. Body must not be altered in height, width, length or contour. “Sports cars” (Karmann Ghia, Porsche, Opel GT, etc.) prohibited. Original steel body shell must be retained. Fiberglass or other lightweight components restricted to hood,

 

 page 33

fenders, splash pans, valance panels and rear deck lid are permitted. Such pieces must resemble stock components replaced. Lift-off hoods and deck lids permitted. Excessive weight reduction of body or body parts prohibited. No underhood modifications. Air dams and spoilers which are available through car manufacturer are allowed front and rear in classes E and F.

BUMPERS: Optional.

FENDERS: Four full stock-production required, duplicate fiberglass permitted. Rear fenders may be altered for wide tires and must have re-rolled or beaded edges.

FIREWALL: OEM mandatory.

GRILLE: Must be full stock production for body used.

HOOD SCOOPS: May not extend more than 5 inches above stock hood surface, one inlet only, and must be finished and painted to match body paint scheme.

STREET EQUIPMENT: Any street equipment which does not affect the external appearance may be removed except tail lights. Electric fans/water pumps permitted.  Stock wiring harness not required.

UPHOLSTERY: Full interior trim must be retained, equivalent to stock. Bucket seats in lieu of stock permitted (2 required) if they are full size, fully upholstered and in stock position. Aftermarket seats prohibited. Headliners and rear seats optional, factory type upholstery and/or paneling required in place of rear seats. Dash board exterior appearance must be maintained.appearance must be retained.

WINDSHIELD, WINDOWS: Windshield and windows must be clear or factory tinted safety glass. Windows need not be operative.

BATTERY: Trunk installation permitted. Maximum: 2. Total weight, wet, fully charged, including battery box: 100 Ibs.

BRAKES: Four-wheel brakes mandatory.

FRAME: Must be stock automobile frame for body used. Front-to-rear frame strengthening members may be added to unibody constructed car. 2” x 3” .120” minimum wall thickness, and located in straight line between front and rear subframe.  If material passes through floor, floor must be welded to member. Cross members may not be altered or relocated except as required for engine or transmission swaps, shock absorber and traction bar installations. Rear may be constructed of 2” x 3” rectangular material with .120 “ wall thickness and must be installed at original height location. 

FUEL SYSTEM: Fuel cells accepted, may be mounted in trunk. Minimum 5 gallons, maximum 16 gallon capacity. See General Regulations.

GROUND CLEARANCE: Minimum: In class A-F, 3 inches from front of car to 12 inches behind centerline of front axle, 2 inches for remainder of car, except oil pan and exhaust headers. Class F cars rocker panel bottom to ground measurement cannot be less than 5 inches.

MOTOR PLATES: Permitted Front and rear.

STEERING: Minimum steering wheel diameter: 13 inches.

SUSPENSION: Stock front required for year/model body used. Any automotive type rear accepted. One hydraulic shock absorber required per wheel. Minimum down travel at shock: 1 inch.

TRACTION BARS: Units must not be longer in overall length than one-half wheel base of car. Traction bars and/or mounting brackets must not be lower than lowest edge of rear wheel rim. Traction bars or any suspension component may not extend through floor of car. Interior floor must remain as originally produced: contour and material. Trunk floor from a point behind original rear seat to rear of car may be refabricated with same thickness materail as removed if ladder barss are used to locate rear axle housing an extra rod and suppoort is required to keep rear end positioned in th event of rod failure.

WHEELBASE: Must be stock for car body used. 105 inches maximum for all classes.  Maximum variation from left to right; 1 inch.

WHEEL AND TIRES: Must be equipped with automotive-type wheels and tires suitable for street use. Aftermarket street wheels and racing slicks permitted. Light weight automotive wire wheels or motorcycle wheels prohibited. Minimum wheel size, 13 inches, unless originally equipped with smaller wheels. No more than 2 inches of tire

tread may extend outside of rear fender. Clearance from outside of rear tire to inside of fender at widest point may not exceed 2 1/2 inches if tire is inside fender/body line. Tire tread may extend 1” outside of stock fender line in classes D through F, front-wheeldrive only.

 

12/22/14

 

The following is a partial list of the changes or clarification made to the 2015 IHRA rulebook.

 

Pro Classes: The Electrimotion shutoff safety device is mandatory in Nitro Funny Car, Pro Stock, Top Fuel and Pro Mod.

Top Dragster: The maximum dial for Top Dragster is 7.60 1/4 mile and 4.90 1/8 mile

Top Sportsman: The maximum dial for Top Sportsman is 7.80 1/4 mile and 5.20 1/8 mile. Full face helmets are mandatory on all entries in Top Sportsman.

Super Rod: An engine containment system is mandatory.

Junior Dragster: The age for the beginner class is 7 to 9.

 

General Regulation Points

The following is a partial list of the changes or clarification made to the 2015 IHRA rulebook.

Pro Classes: The Electrimotion shutoff safety device is mandatory in Nitro Funny Car, Pro Stock, Top Fuel and Pro Mod.

Top Dragster: The maximum dial for Top Dragster is 7.60 1/4 mile and 4.90 1/8 mile

Top Sportsman: The maximum dial for Top Sportsman is 7.80 1/4 mile and 5.20 1/8 mile. Full face helmets are mandatory on all entries in Top Sportsman.

Super Rod: An engine containment system is mandatory.

Junior Dragster: The age for the beginner class is 7 to 9.

General Regulation Points

The Pro-Am event claims structure for 2015 will be reduced to best 5 of 7 events.

The following is an amendment to the staging and starting system section in general race regulations: If both cars leave before the timing system is activated in any class, the competitor doing it first will be disqualified. If the race director is unable to determine who left first, both competitors will be disqualified.

Collectors that utilize springs or less than 4 tabs on collector and 4 tabs on primaries must use a secondary method for tethering collector. Tethering devices may be made from minimum 1/8" steel cable and t-bolt clamps or muffler clamps with locking fasteners.

SN-2000 helmets are not permitted in Quick Rod, Super Rod, Hot Rod, Super Stock or Stock.

SN-1995 helmets will not be permitted in any entry ET bracket class.

The following is an amendment to the staging and starting system section in general race regulations: If both cars leave before the timing system is activated in any class, the competitor doing it first will be disqualified. If the race director is unable to determine who left first, both competitors will be disqualified.

Collectors that utilize springs or less than 4 tabs on collector and 4 tabs on primaries must use a secondary method for tethering collector. Tethering devices may be made from minimum 1/8" steel cable and t-bolt clamps or muffler clamps with locking fasteners.

SN-2000 helmets are not permitted in Quick Rod, Super Rod, Hot Rod, Super Stock or Stock.

SN-1995 helmets will not be permitted in any entry ET bracket class.

9/4/14

p. 59 Summit Sportsman Safety and General Rules: Add the following: Tail Light: A minimum of one functional tail light mandatory on all entries.

 

6/16/14

p. 33 Super Stock: Modified Stock: Hood: Delete the limitation of 5 inch high opening from the section. The maximum overall height is limited to 11 inches.

3/14/14

p. 87 Ignition: Add the number 7761 to the first sentence of the section. It should read as follows:"The use of any ignition system (eg MSD 7531) or related accessory (eg 7561 or power grid accessory 7761) that uses a multipoint or rate of acceleration rev limiter are prohibited from use in IHRA unless specified by individual class requirements.

2/25/14

p. 14 Top Sportsman: Transmission: Change the sentence in the middle of the section to read as follows: "All entries with pressurized transmissions must have interior sheet metal tunnel isolating drivers compartment from unit or the driver must use a 3.2A-15 driver suit if tunnel is not present."

p. 81 Delay Device: Delete the last sentence in the first paragraph and replace the first sentence of the second paragraph with the following: "All wiring associated with the delay device, throttle stop, ignition system, automatic shifter and electronic fuel injection must be fully visable, labeled and traceable. Delay devices and components must be utilized in an unaltered manner consistent with the manufacturer's installation and instruction books."

p. 56 Hot Rod: Replace the first sentence with the following: "An SFI 30.1 flexplate shield is mandatory on all entries running faster than 135 mph."

1/21/14

p. 19 Super Stock: Class designations: Add the following class: SS/BBS and SS/BBA.

Update the class break section to the following:

Class AA...5.00 to 5.49     INDEX - SS/AAS and SS/AAA 9.15 (1/4) & 5.95 (1/8)
Class BB...5.50 to 5.99     INDEX - SS/BBS and SS/BBA 9.80 (1/4) & 6.35 (1/8)

1/10/14

p. 24 Super Stock / GT: Change the third to last sentence of the designations section to the following: "Cars must have originally been equipped with a V-6 or V-8 or be IHRA accepted based upon original shipping weight."

12/30/13

p. 48 Pure Stock: Camshaft: replace 12/10/13 revision with the following: Camshaft must retain OEM lift, duration and overlap for horsepower claimed as verified by manufacturer supplied specifications. Aftermarket camshafts meeting specifications permitted. If complet