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Welcome to the Lucas Oil World Series of Off-Road Racing -- high stakes off-road racing with an attitude! National membership applications are available by contacting WSORR online at talk2us@WSORR.com or by contacting the WSORR Business Affairs Manager at (715) 478-4999.
Memberships are available in three divisions and 12 off-road racing classes making the World Series the largest off-road short course sanctioning body of its type in the nation.
Listed below are WSORR Divisions and Class Names:
WSORR "Heavy Metal" Professional Division
Includes five classes of the pinnacle of high horsepower, high performance race vehicles in the USA:
• PRO 4x4
• PRO 2WD
• PRO Light Pickup (compact & mid-size pickups)
• PRO Super Buggy
• PRO Ultra 4x4 (in development stage)
WSORR "SRT" Division
Includes five classes of race pickups, SUVs and off-road buggies ranging from stock to high performance configurations:
• Super Stock Truck
• Stock Truck
• Formula 4x4 (Pickups and SUVs)
• 1600 (aka Single Buggy)
• 1600 Light (aka Lite Buggy)
WSORR "Grassroots" Division
Midwest off-road racing started somewhere and it is with these classes almost four decades ago. Two classes of highly affordable entry level vehicles that race a limited schedule:
• Classix
• Enduro Pickups
More detailed descriptions of WSORR classes are available below. This material is from the official 2007 WSORR Rule Book with some additions for 2008. A summary of rule changes for 2008 is listed at the bottom of this page.
HEAVY METAL PROFESSIONAL 4X4 TRUCK
Specs: A custom built full size four-wheel drive pickup truck. The vehicle must be a standard manufacturer production model available to the general public in the United States, produced in amounts of a minimum of 5,000. Manufacturer body styles and engines must be from the same manufacturer.
Horsepower: 8 cylinders, 750 to 900 HP
Suspension: Front wheel travel limit 18 inches; rear wheel travel limit 20 inches.
Chassis: Maximum wheel base 122 inches; minimum wheel base 113 inches; maximum track width 93 inches.
Body: Maximum body width 80 inches.
Weight: Minimum weight with driver 4,000 pounds, minimum front axle weight 48% of total truck weight.
Tire Size: 35 x 12.50 maximum.
Numbering: 1-99
HEAVY METAL PROFESSIONAL 2WD TRUCK
Specs: A custom built full size two-wheel drive pickup truck. The vehicle must be a standard manufacturer production model available to the general public in the United States, produced in amounts of a minimum of 5,000. Manufacturer body styles and engines must be from the same manufacturer
Horsepower: 8 cylinders, 750 to 900 HP
Suspension: Front wheel travel limit 18 inches; rear wheel travel limit 20 inches.
Chassis: Maximum wheel base 120 inches; minimum wheel base 113 inches; maximum track width 93 inches.
Body: Maximum body width 80 inches.
Weight: Minimum weight with driver 3,750 pounds; minimum front axle weight 48% of total truck weight.
Tire Size: 35 x 12.50 maximum.
Numbering: 1-99
HEAVY METAL PROFESSIONAL LIGHT PICKUP TRUCK (2WD)
Specs: A custom built, light duty two-wheel drive pickup truck. The vehicle must be a standard manufacturer production model available to the general public in the United States, produced in amounts of a minimum of 5,000. Manufacturer body styles and engines must be from the same manufacturer.
Horsepower: 4 cylinders, 300 HP
Suspension: Front wheel travel limit 12 inches; rear wheel travel limit 14 inches.
Chassis: The standardized chassis must be constructed in accordance to WSORR specs.
Body: Light duty body styles such as Ford Ranger, Nissan Frontier, Toyota Tacoma
Weight: Minimum weight with driver is 2,800 pounds; minimum front axle weight is 45% of total truck weight. PRO Light Fords using the short deck block running individual runner intake manifolds will have a minimum weight of 2,750 pounds. Those running plenums or balance pipes must weigh a minimum of 2,825 pounds.
Tire Size: 32 x 11.50, D.O.T. approved.
Numbering: 1-99
PRO SUPER BUGGY
Specs:
A single seat four wheel vehicle utilizing many different engine
combinations with unlimited suspension chassis designs. Engines are
limited to c.c. limits from 1650 to 1915 depending on design and
manufacturer.
Horsepower: 200 HP
Suspension: Unlimited.
Chassis: Custom built.
Weight: 1580 lbs. minimum.
Tire Size: D.O.T. approved, only.
Numbering: 900-999
PRO ULTRA 4x4 (DEVELOPMENTAL STAGE OVERVIEW)
Ultra 4x4 is designed as a less expensive alternative to PRO 4x4. This is considered a spec class meaning most all chassis and drive train parts and design will be dictated by WSORR. The trucks will be smaller and much lighter than the current PRO 4x4s and can be bodied as ether a truck or SUV.
This truck is designed to reduce overall build, maintenance as well as R&D costs. Our hope is to have almost all repair parts available at each event in order to save teams even more. Trucks and motors will be available in any stage of completion. From frame with arms, complete kits or turnkey. Build prices will be available soon and will be much less than any of the top tier classes now competing. Plans include the Ultra 4x4 class to be in the future WSORR SPEED TV package.
1. Frame and suspension components will be built to the WSORR spec design. Arms, spindles etc. will be all the same with replacement parts available at each event.
2. All trucks will run the same Borg Warner transfer case and a spec front and rear drive line.
3. Weight will be about 3,400 pounds for trucks running a V8 or 3,200 for those using a V6.
4. Spec Ford, Chevy and Mopar V8s will be 364 cubic inch using a spec untouched Brodix head and intake manifold. Only flat top pistons are allowed. A single 4 barrel carburetor must be used. Cast iron block only. This engine will have a 10.5 to 1 compression ratio and will be allowed to use E85 fuel if desired. Horsepower will be at about 545 with the cost of a complete motor being under $15,000.
5. GM Turbo 400 transmissions must be used. Under/overdrive units are not allowed.
6. The 4.0 liter V6 engine package will be more open and fuel injection will be allowed.
7. Multi Valve V8 engines will be available at some point when a suitable package can be found. Until this time the use of a body not brand specific to the motor may be allowed.
8. D.O.T. tires must be used.
SRT DIVISION
SRT SUPER STOCK TRUCK (200-299 RACE NUMBER SERIES)
Specs: An unlimited two-wheel drive pickup or sport utility vehicle built on an OEM or tubular frame, engine and body must be from same manufacturer. Maximum of 410 cubic inch engine block with WSORR approved heads only.
Horsepower: 600 HP
Suspension: Front wheel travel limit 18 inches; rear wheel travel limit 20 inches.
Chassis: Maximum wheel base 120 inches; minimum wheel base 113 inches; maximum track width 93 inches.
Body: Maximum body width 80 inches.
Weight: Minimum weight with driver 3,600 pounds minimum front axle weight 48% of total truck weight.
Tire Size: 33 x 12.50 and 35 inch, D.O.T. approved.
SRT STOCK TRUCK (800-899 RACE NUMBER SERIES)
Specs: A two-wheel drive, standard size pickup. The vehicle must be a standard manufacturer production model available to the general public in the United States, produced in amounts of a minimum of 5,000. This is a production division and must maintain the engine, body and frame combination for a specified year. Includes sprint course trucks such as 8s trucks.
Engine: 370 cubic inch, with carburetor restrictor plate.
Suspension: Wheel travel limit is 12 inches.
Chassis: Stock frame and suspension with limited modifications.
Body: Stock design but can be of any material.
Weight: 4,150 lbs. minimum
Tire Size: 33 x 12.50 D.O.T. approved.
SRT FORMULA 4X4 TRUCK (400-499 RACE NUMBER SERIES)
Specs: A four-wheel drive sport utility class with no longer than 110" wheel base, or 82" track width.
Horsepower: 400 + HP
Suspension: Must be stock concept.
Chassis: Stock frame.
Body: SUV
Weight: 3,300 to 4,100 lbs depending on the motor.
Tire Size: 33 x 12:50 D.O.T. approved.
SRT 1600 BUGGY (300-399 RACE NUMBER SERIES)
Specs: A single seat limited 4-wheel vehicle utilizing a type-1, 1600 CC Volkswagen air-cooled engine.
Horsepower: 70 HP
Suspension: Stock VW design, some modifications are allowed.
Chassis: Custom built.
Weight: 1580 lbs. minimum.
Tire Size: D.O.T. approved, only.
SRT 1600 LIGHT BUGGY (100-199 RACE NUMBER SERIES)
Specs: A single seat limited 4-wheel car using Volkswagen type 1 stock components with a 1585 cc engine. All parts are to be stock type “1” VW.
Horsepower: 55 HP
Suspension: Stock VW design with very few modifications allowed.
Chassis: Custom.
Weight: 1550 lbs. minimum.
Tire Size: 15 inch, D.O.T. approved.
GRASSROOTS CLASSIX RACE CARS (600-699 RACE NUMBER SERIES)
Specs: A two wheel drive passenger car or a sport utility vehicle using only two wheel drive.
Horsepower: 460 cubic inch or less.
Suspension: Original concept of suspension and springs.
Chassis: Original shape, size and appearance of the body.
Weight: Full size SUV’s must weight 4,400 lbs. minimum. Traditional cars must weigh GVW plus 200 lbs. or 3,000 lbs., which ever is more. Light SUV’s with 6 cylinder engines must weight 3,800 lbs.
Tire Size: D.O.T. approved.
GRASSROOTS ENDURO TRUCKS (500-599 RACE NUMBER SERIES)
Specs: A two wheel drive pickup truck with a ¾ ton or smaller chassis.
Engine: GM 350, Mopar 360, Ford 351 Windsor or smaller
Suspension: Stock suspension parts and locations.
Chassis: Must remain stock with no additional material added.
Weight: Trucks less than ½ Ton chassis must weight at least 3,500 lbs.
Tire Size: 33 x 12.50, D.O.T. approved.
2008 WSORR Rules Update
1. An entry fee refund can no longer be given once a vehicle enters the race course for competition. If damage occurs in the first round of practice and the vehicle is unable to compete in at least one round of the event a refund will be allowed.
2. Rookie drivers will not be eligible to draw for starting positions at the first event of the year. They will line up at the rear of the field in the order of their entry postmark. If a team goes to a backup car for the second round of an event they will start at the rear of the field.
3. Helmets must be 2000 Snell or newer.
4. Head and neck restraints such as the HANS, D-Cell or Hutchens devices are mandatory in all PRO Truck classes as well as Super Stock Truck and Super Buggy. They are strongly recommended for all classes.
5. All PRO Trucks and Super Stock Truck must have a ¼ inch metal protective shield covering the back and bottom of the seat. Rear suspension arm tethers will be mandatory in 2009.
6. D.O.T. tire rule clarification;
A. Tire must meet all D.O.T. guidelines and tests and must be stamped as such.
B. Must be readily available to the general public in quantity if requested.
C. Model of tire must be offered in multiple sizes and conform in size with industry
standards.
D. Retail pricing must be competitive with other manufacturers.
7. E85 ethanol fuels, as sold to the general public, will be allowed in Stock Truck, Super Stock Truck and PRO 2WD. No additives will be allowed.
8. PRO Light; Fords using the short deck block running individual runner intake manifolds will have a minimum weight of 2,750 pounds. Those running plenums or balance pipes must weight a minimum of 2,825 pounds.
9. Stock Truck; The line ‘bore and stroke open’ will be deleted and the following will be added. Stock cast or forged steel crankshaft or OEM aftermarket replacement only. Rod journal grind is open but all the following engine rules must be adhered to. All other engine rules will be the same as 2007. Transmission cooler may be mounted in any safe location.
10. 1600 Light Buggy; All pistons may be balanced to a minimum weight of 390 grams (piston only).
11. Super Stock Truck will be allowed to use a 35 inch DOT tire.
Please contact us for additional info for Enduro Truck and Formula 4x4 rules.
We appreciate your interest in the Lucas Oil World Series of Off-Road Racing.
Go off-road. Go WSORR!
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