Drag Radial Rules
Drag Radial is a heads-up class for all types of vehicles. Rear suspension may utilize ladder bar or four-links (no full tube chassis). Legal combinations include the use of nitrous oxide, supercharger, turbocharger and normal aspiration at different weight breaks for parity. All entries must compete on a on a 12 inch wide (or smaller) DOT approved, Mickey Thompson or Goodyear Drag Radial Tire.

Class Guidelines:
BODY:
The car must retain its original appearance and profiles. Aftermarket fiberglass or carbon fiber replacement panels are limited to hood, front fenders, doors, deck lid and bumpers. One piece front ends are permitted, but must retain factory head light, grille and bumper appearance.

BRACKET RACING AIDS:
The use of bracket racing aids such as optical sensors, delay boxes, stutter boxes, and throttle stops are not allowed.

FIREWALL:
Must retain in original factory location, and be constructed out of sheet-metal. Notching of factory firewall for valve cover clearance is allowed. Firewalls that are moved back from the factory location will receive a 50lb weight penalty..

INTERIOR:
Dash board must be factory appearing and in stock location.

WINDOWS:
Must be of safety glass, Lexan, or other shatterproof materials, minimum 1/8th inch thick. Also must be clear and non hazy.


CHASSIS / SUSPENSION

FRONT SUBFRAME:
All sub framed or full framed cars must retain complete stock front subframe from firewall forward. Frame connectors or rear frame rails may not pass engine firewall, except for the following exceptions. The 62-67 Chevy II's and 64 1/2-68 Mustangs and similar cars with bolt-on front K-members, must retain stock or aftermarket bolt-on front subframe. The subframe must be a bolt on (not welded, unless kit is OK by WCSA officials) to factory mounting location. Frame connectors or rear frame rails may pass firewall location, but not exceed where original front subframe mounts to the body. All late model Mustangs must retain factory front subframe from firewall forward. Stock or direct fit aftermarket K-members are permitted, but must be bolted in factory location using factory bolt holes. Cross members on all front sub frames may be altered or removed for oil pan clearance.

FRONT SUSPENSION:
All cars must retain stock suspension, aftermarket tubular control arms, coil over kits, or OEM front strut retrofits are permitted. Replacement Bolt-on Lightweight K-Members are legal, but must be a direct bolt on, no welding modifications permitted. Stock wheelbase will be enforced on all vehicles. You can weld tubes from your roll cage to the front suspension..

**The only front suspension bolt-on kit deemed legal by the WCSA are the CHRIS ALSTON, AJE, HEIDTS, Smith Racecraft and *FATMAN bolt-on kits (for 62-67 Nova's, 67-69 Camaro's & early Mustangs) Total Control Products Coil Over Conversion Kits, and The Rod & Custom Motorsport Mustang II kit for 64 1/2-66 Mustang, Part #RC-106 & Skinny Kid front end kits for late model Mustangs.... Kits must be installed as instructed and not modified.

K-MEMBER:
Aftermarket factory-replacement-type K-member permitted, but must attach to the chassis using only the original factory OEM-type mounting bolts. No part of the K-member may be welded to the chassis.

REAR SUSPENSION:
No Restrictions

DRIVE TRAIN

AUTOMATIC TRANSMISSIONS:
Any OEM automatic transmission permitted. Aftermarket torque converter, shift kit, valve body, shifter, and pan cooler use are permitted. Trans brakes are permitted.

MANUAL TRANSMISSION:
After-market clutch (single disc only) assisted manual transmissions are permitted Clutch/Automatics or planetary transmissions (Lenco or Jeffco converter driven) are allowed with a 100lb weight ad.

ENGINE:
Cubic inch limits. (see weight guide below)

ENGINE BLOCK:
No Restrictions
OIL-RETENTION DEVICE:
All Drag Radial cars must utilize an NHRA-accepted lower engine oil-retention device; may use a belly pan in lieu of a device attached to the engine. The belly pan must extend from framerail to framerail and extend forward of the harmonic balancer and rearward of the flywheel and must incorporate a minimum 2- inch-high lip on all sides. A nonflammable, oil-absorbent liner mandatory inside of retention device.
ENGINE MOUNT LOCATION:
The maximum allowable engine setback from the center line of the number-one spark-plug hole to the center line of the front spindle is 2 inches, except in those vehicles in which the engine was factory installed at a distance greater than 2 inches behind the spindle. In both cases, the engine must be mounted in front of the Original Factory Firewall Location. For those cars with the firewall moved back and your engine is more than 2" and Less than 4" from the center line of the number-one spark-plug hole to the center line of the front spindle, you will be penalized an additional 50lbs
CYLINDER HEADS:
Any cylinder head is allowed as long as only 1 spark plug per cylinder is functional.

CARBURETOR / THROTTLE BODY:
Any single or dual carburetor or throttle body set-up is allowed

EFI:
Any EFI system is permitted

NITROUS:
Any nitrous combo is legal.

SUPERCHARGER:
Roots up to a 14.71 (No Screwchargers) See weight adds.
TURBOCHARGER:
Twin Turbo 94mm Max ea. See weight adds.

EXHAUST:
Production type mufflers or collector mufflers are required. Modification or removal of muffler internals is prohibited (no gutting).

IGNITION:
No restrictions

OILING SYSTEM:
No Restrictions. The front cross member may be altered for oil pan removal. Vacuum pumps are acceptable.

ON BOARD DIAGNOSTICS / DATA RECORDERS:
On board diagnostic computers and recorders are permitted. Memory and playback tachometers are allowed.
TRACTION CONTROL:
Not Permitted & Strictly Prohibited

STEERING:
Rack and Pinion allowed on all vehicles.

STREET LEGAL REQUIREMENTS:
All cars are required to have factory appearing front end and headlights (decals or airbrush accepted)

TIRES:
Front tires must have a minimum tread width of 4.5 inches. Front tires do not have to be DOT
approved. Rear Tires: Mickey Thompson or Goodyear...12 inch MAX wide D.O.T. Drag Radials or Slick
Mickey Thompson 29.5x10.5 (part # 3062 or 3062s) Or Goodyear 29.5x10.5 (Part # D2690 or D2709)

WHEEL BASE:
Must retain stock wheel base with a maximum variation right to left and front to back of one inch..

WHEELIE BARS:
Wheelie bars permitted

Drag Radial WEIGHT GUIDE
Base Weight (All weights are race-ready, car with driver)
4 Cly W/Any Power Adder............................................2300 lbs
V/6- W/Nitrous...............................................................2300 lbs
V/6 W/Turbo or Blower.................................................2500 lbs
I/6 W/Turbo or Blower & Nitrous...................................2650 lbs
Small Block W/Nitrous..................................................2450 lbs
Small Block W/Roots Blower........................................2900 lbs
Small Block W/Blower (Up to 4.5 Inducer Diameter)...............2900 lbs
Small Block W/Blower
(4.51- 4.84 Inducer Diameter)..............3000 lbs
Small Block W/Blower
(4.85 to 5.47 Max Inducer Diameter)......3100 lbs
Small Block W/Single Turbo ........................................2950 lbs
Small Block W/Twin Turbo ..........................................3150 lbs
Big Block W/Nitrous (up to 570ci)..................................2750 lbs
Big Block W/Nitrous (571 to 600ci).................................2800 lbs
Big Block W/Nitrous (601 to 650ci).................................2850 lbs
Big Block W/Nitrous (651ci & up)...................................3000 lbs
Big Block Roots SC ......................................................3100 lbs
Big Block Centrifugal SC (up to 600ci)...........................3200 lbs
Big Block Centrifugal SC (601ci & up)............................3300 lbs
Big Block Single Turbo (up to 600ci)..............................3200 lbs
Big Block Single Turbo (601ci & up)...............................3300 lbs

Big Block Twin up to 94mm Turbo (up to 600ci).............3400 lbs
Big Block Twin up to 94mm Turbo (601ci & up)..............3500 lbs


WEIGHT ADDS & BREAKS:

Add 50 lbs.
For Non Factory Location Firewall
Add 50 lbs.
For Engine Set-Back over 2" but not to exceed 4" (#1 Spark Plug behind Front Spindle Centerline)
Add 100 lbs. For a Lenco/Bruno Converter Driven Planetary Transmission
Deduct 50 lbs.
For 91mm or smaller Turbo's (Big Block Twin Turbo Entries)
Deduct 50 lbs.
For Using a "Blo-Thru" Carb(s) on a Boosted Combo
Deduct 50 lbs. For Stock Suspension (All attaching points in stock locations - excluding shocks)
Deduct 150 lbs.
For Mod Motor Combo's
Deduct 400 lbs.
For No Power Adder (off of Nitrous Combo's weights)