PACIFIC TRACTOR PULLER'S ASSOCIATION

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PULLING CLASS INFO


NATURAL ASPIRATED MINI

Tractor must weigh no more than1850 with driver.  Is limited to one V/8 motor with carburetor or injectors on alcohol or gas, no turbos or nitro allowed.  Wheel base limit to 8 feet and no wider than 6 feet.  Rear tires are limited to 18.4 x 16.1 maximum with a rim size of 16.1 inches.  All general safety rules apply

SUPER MODIFIED BLOWN MINI

Tractor must weigh no more than 2000 lbs with driver.  Is limited to one V/8 motor.  A 572 c.i. limit.  Turbos and blowers allowed, running on gas or alcohol, no nitro allowed.  Wheel base limit to 8 feet and no wider than 6 feet.  .  Rear tires are limited to 18.4 x 16.1 maximum with a rim size of 16.1 inches.  All general safety rules apply. 

5800 lb MODIFIED TRACTOR

Tractor must weigh no more than 5800 lbs with driver.  Is limited to one motor (ie. One V/8; one Allison or Turbin maximum).  Turbos and superchargers allowed, running on gas or alcohol, no nitro allowed. Wheel base limit of 14 ft..Rear tires are limited to30.5 inches wide with a rim diameter of no more than32 inches, width is determined by the manufacture.  All general safety rules apply.

7200 LBS. MODIFIED TRACTORS

Tractor must weigh no more than 7200 lbs with driver.  Is limited to two motors (ie. Two V/8, two Allisons or Turbins maximum). Turbos and superchargers allowed, running on gas or alcohol, no nitro allowed.  Wheelbase limit of 14 feet.  Rear tires are limited to 30.5 inches wide with a rim diameter of no more than 32 inches, width is determined by the manufacture.  All general safety rules apply.  

8000 LBS. UNLIMITED MODIFIED TRACTORS

Tractor must weigh no more than 8000 lbs with driver.  You may run as many motors as weight will allow.  Turbos and subperchargers allowed, running on gas or alcohol, no nitro allowed.  Wheelbase limit of 14 feet.  Rear tires are limited to 30.5 inches wide with a rim diameter of no more than 32 inches, width is determined by the manufacture.  All general safety rules apply.  

9300 LB SUPER FARM STOCK

Tractor must weigh no more that 9300 lbs with driver.  Super Farm Tractors will run under the same guidelines as the pro stock tractors except for the following changes.

  • Engine size to be no larger than 640 cid.

  • OEM stock head for that model or series engine.

  • No overhead cams.

  • OEM stock intake and exhaust manifolds for that model or series engine.

  • Intercoolers will be permitted.

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Page Updated:  Tuesday, 18. December 2007
Webmaster: 
Kathy Fagundes