IAMO 2009 Winners
 Iowa - Missouri Truck & Tractor Pullers                                      Since 1997
HOME
 ABOUT IAMO
SCHEDULE
POINTS
RULES
BULLETINS
AWARDS
LINKS
ADVERTISING
 		Light Limited Pro Stock Tractors

 

 


 

Weight

 

  1. Twin Turbo Super Stock Tractors weigh 6,000 lbs, Single Turbo Super Stock Tractors weigh 6,200 lbs, and Pro Stock Tractors weight 6,500 lbs.

 

Engine

 

  1. All Tractors are limited to 350 cubic inch displacements. NO De-Cubing of larger displacements allowed.
  2. Engine must be the manufactured designed block for the tractor. Tractors may run newer sheet metal but must retain original driveline.
  3. Cylinder head must match engine block without modification on Pro Stock Tractors. OEM head required on Pro Stock Tractors. Super Stock Tractors may run any non-overhead cam cylinder head.
  4. No converting Diesel engine to gasoline in Pro Stock Tractors. This is allowed in Super Stock Tractors.
  5. Exhaust must exit straight up.

 

Fuel System/Turbo

 

  1. Gasoline engines may only have one carburetor.
  2. Diesel tractors may run up to a single Bosch "P" Series injection pump. NO Sigman Pumps allowed.
  3. Pro Stock Tractors are allowed to run Gasoline or Diesel Fuels. No fuel injection of gasoline on Pro Stock Tractors. Gasoline must be inducted into engine by a carburetor on Pro Stock Tractors. Super Stock Tractors may run Gasoline, Diesel, or Alcohol.
  4. Tractors may run a 50/50 mix of alcohol and water in water injection system.
  5. Diesel powered tractors must be equipped with a fuel dump or by-pass valve that can be operated from the driver's seat at the injection pump fuel inlet fitting or fittings.
  6. All turbo chargers not located under hood must be completely shrouded except for inlet and exhaust pipes with steel .060 or thicker.
  7. All turbo chargers under fiberglass hoods must meet specifications listed in rule #6.

 

Tires

 

  1. A maximum of 24.5x32 tires on Pro Stock Tractors and 30.5x32 tires on Super Stock Tractors. Any cut allowed.

 

Chassis and Hitch

 

  1. All tractors to have a "Wide Front" axle. No single pedestal front axles allowed.
  2. Sheet metal must match brand of tractor.
  3. All Tractors are not to be longer than 13 feet from the center of the rear axle to the forward most position of the trator including weights.
  4. Front weights not to extend 36 inches forward of the factory grille position.
  5. Rear weights cannot extend past the rear tires.
  6. Drawbar cannot be connected to the hydraulic system in any manner.

 

Safety

 

  1. All tractors must be equipped with engine side shields.
  2. All tractors must be equipped with stabilizer bars.
  3. All tractors must be equipped with wheelie bars.
  4. All tractors must be operated with hood, grille, and have fenders that support the weight of the driver.
  5. All tractors must have a fire shield between the engine and the driver of no less than .060 metal fromside shield to side shield and from top to bottom.
  6. All tractors must have two (2) 3/8" bolts in the exhaust as close to the elbow as possible at 90 degree angles and no further than two inches apart.
  7. All tractors must have a nationally approved scatter blanket.
  8. T/A's, Power Directors, or like transmissions must be shielded with a steel shield or a board approved scatter blanket.
  9. All tractors must be equipped with approved type kill switch(s) or air shutter kill devices that can be activated by the pulling sled.
  10. All drivers must wear an approved fire suit and DOT approved helmet.
  11. All throttles must be of the "Dead Man" type and must idle in the rearward position.
  12. All tractors must be equipped with capable roll over protection.
  13. All tractors must be equipped with a fire extinguisher within the reach of the driver.
  14. All tractors must have a shield on the front crankshaft pulley and/or harmonic balancer, which will, in the event of a failure, contain the pulley and/or balancer within the engine compartment.
  15. All tractor engines must have a 3/8" minimum steel cable surrounding the engine.
  16. NEW FOR 2010: All tractors must be equipped with front stabilizer bars or skis. The lower most portion of the bar must be no higher than 4" off the ground.