IAMO 2009 Winners
 Iowa - Missouri Truck & Tractor Pullers                                      Since 1997
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Heavy Super Field Tractors

Weight

 

  1. 10,200 lbs

 

Engine/Turbo/Fuel System

 

  1. RPM Limit is restricted to 2800 RPM with 1% tolerance.
  2. All tractors will be equipped with an IAMO approved RPM sensor and telemetry with 2008 female plug.
  3. Fuel Injection Pumps will be stock appearing for that make and model.
    1. ABSOLUTELY NO "P" PUMPS ALLOWED
    2. Roosamaster max at .450 head
    3. Ambac model 100 Max at 13MM
    4. Simms pump max at 11.5MM
    5. Bosch "A" max at 10MM
  4. No water injection or injection of any alternative fuels.
  5. Turbo charger limitations.  Tractors may run one turbo no larger than or equivalent to 3LM466 (2.33 Inlet x 2.75 Outlet).  NO Slots, NO Slugs (permanent or removable) or Reducers.
  6. Cubic Inch Limitations.  Any tractor may run stock cubic inch for Make and Model of tractor being pulled.  Any tractor running a stock engine smaller than 466 cubic inches may "power-up" the existing OEM power-plant to the 466 cubic inch limit. Note: The tractor named Lil' Ruckus owned and/or operated by Corwin Cox and John Duff is "Grandfathered" as a 970 Case tractor with a 504 cubic inch power-plant.  This tractor is to be no larger than 504 Cubic inches.
  7. Inter-coolers are not allowed.   No aluminum or billet heads and no after-market heads.
  8. Tractor must run factory intake and exhaust manifolds.  No spacers between manifolds and cylinder heads.  Note:  Tractors that were non-turbocharged in factory form may build manifolds for turbo, if no factory parts are available for that series of engine.
  9. No deck plates between cylinder heads and blocks.
  10. Exhaust will have 2- 5/16" bolts as close to the elbow as possible at a 90 degree angle from each other and no more than two inches apart.

 

Tires

  1. Tire Size not to exceed 20.8x38
  2. No cut tires allowed.
  3. 18" rim width maximum.
  4. Front tires may be no smaller than 7.50x15 or 7.5Lx15 on any rim width.

 

Safety and Other Requirements

  1. NEW FOR 2010 and beyond. All tractors must be equipped with a factory style R.O.P. device or a 3 bar roll cage.
  2. All tractors must be equipped with a fire extinguisher within driver’s reach at all times.
  3. All tractors may DELETE PTO and PTO housings. (New for 2010)
  4. All tractors must be equipped with wheelie bars.
  5. Drawbar will not be over 20" from ground at point of pull.  The point of pull will be a minimum of 18" from center line of rear axle.  No pulling from 2 or 3 points allowed.
  6. All tractors running radiator fan blade must have side shields.
  7. All Diesel tractors will be equipped with an air shutter kill.  Full Electrical kill must be provided if tractor has spark ignition.