IAMO 2009 Winners
 Iowa - Missouri Truck & Tractor Pullers                                      Since 1997
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9500 Pro Field Tractors

 

Weight

  1. 9,500 lbs

 

Engine/Turbo/Fuel System

  1. Cubic inch limit 466. 3000 RPM with 1% tolerance
  2. All tractors will be equipped with approved rpm telemetry with New for 2008 Female Plug.
  3. 13mm P-Pump maximum
  4. a.  Turbo size shall be limited to one turbo not to exceed 2.75" inlet.  A compressor measurement at the face of the wheel inlet will not exceed a maximum of 2.75".  The wheel may be no larger than that measurement.  The compressor wheel must protrude into the intake 1/8th of an inch and be no larger than 2.75" at that point.  Only factory MAP width enhancement groove of .125 or less allowed.
    b.  New for 2010  An optional turbo for this class, a GT4202 or GT4202R, with no modifications of any type or style, will be allowed.  Exhaust housings for this turbo must be unaltered and be of one of the following part numbers: 757707-1, 757707-2, 757707-3, or 757707-4.  No permanent or removable "slugs" or "reducers" of any type are allowed.
    c.  Turbochargers are subject to inspection without notice by an approved inspection committee of Iowa-Missouri Truck and Tractor Pullers.  A turbo protest by a competitor in this class is allowed for a fee of $40.00 with the association retaining $20.00 whether the turbo is found to be illegal or not.  If the person being protested is found to be legal they retain the other $20.00.  If the turbo is found to be illegal the $20.00 is returned to the protestor.
  5. Exhaust will have two 5/16" bolts as close to the elbow as possible at a 90 degree angle from each other no more than 2" apart.
  6. Tractors must run factory intake manifolds OEM to the make of tractor.  Water injection systems are allowed.  Only water and approved lubricants are allowed.  No inter-coolers or after-coolers allowed.  Intercooler manifolds allowed, if gutted.  This is open for random inspection and water may be provided for all tractors competing during any given event at random and without notice.  Violation of this rule qualifies as cheating and driver and tractor, regardless of ownership, is banned for 1 year and 1 day from the date of the infraction.

 

Tires

  1. Maximum tire size allowed is 20.8x38 any cut or 24.5x32 any cut.  No tires wider than 25".
  2. Front tires may be no smaller than 7.50 x 15 or 7.5L x 15 on any rim width.

 

Drawbar

  1. Drawbars will not be over 20 inches from the ground at point of pull and be a minimum of 18 inches from center line of the rear axle.  No pulling from 2 or 3 points allowed.

 

Safety

 

  1. All drivers must wear an approved fire suit and a DOT approved helmet.
  2. All trucks will be equipped with a fire extinguisher within the reach of the driver.
  3. All tractors will be equipped with wheelie bars.  No more than 10" above the ground and no less than 20" from the outside of the pads across.  Must have pads that are a minimum of 5 inches square and has to support the weight of the tractor.
  4. All Pro-Field Tractors will have a 6-belt scatter blanket around the bell housing (no certification necessary).
  5. All tractors with a radiator fan blade must have side shields.
  6. All tractors will have an air kill switch placed not over 8" from the center line of the tractor and not higher than 48" from the drawbar.  Tractor's weights must not interfere with kill switch.
  7. All tractors shall be equipped with Roll over Protection whether it is of OEM design or multi-bar roll cage style.
  8. 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.