Prairie Tractor Pullers 
Prairie Tractor Pullers 
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Prairie Tractor Pullers

 

General Rules:

1. Contest is open to two-wheel drive, rear wheel drive, rubber tired tractors. Max tire size for all classes is 26x12x12.

2. Tech officials will enforce all rules; All tractors must pass safety check and meet class rules to be allowed to compete.

3. Operator must remain seated during pull attempt and must have complete control of tractor at all times. Operator must keep one hand on steering wheel at all times or will result in DQ. No hand may grasp edge of fender for duration of that pull or will result in DQ.

4. Drivers must be 4 – 12 years of age for Stock Youth, 8 years of age for stock classes, 12 years for Stock Alt, Sport Stock, Pro Stock, & 16 for all other classes.

5. The first puller in each class has the option of keeping there first distance or coming back right away, 3rd position, or last you must decide before unhooking from the sled. The first puller in each class will be the test puller, this is the only person that is allowed to go out of bounds on the first hook and still be eligible for a second hook, no matter even if it is before the shut down area. If the test pullers has driveline breakage on their first attempt they will have the option to come back before the class is over.

6. Every puller has two chances to go at least 75 feet, you must signal to the flagman before you pass 75 ft. If you have driveline breakage before 75 ft you can repair and return in last position, you have 5 min. after the last puller pulls to attempt your pull.

7. All pullers must wear a dot approved helmet with chin strap fastened, and long pants, all pullers must wear a fire jacket (except stock) any puller burning methanol must wear full fire suit. Stock Pullers must have long sleeves. All jackets must be zipped up. No nylon pants or coats.

8. All tractors must have functional brakes, steering and a secure seat with a minimum 3” backrest.

9. All tractors must be equipped with a fully charged 1-1/2 lb fire extinguisher.

10. All tractors must have a dead man throttle.

11. All exhaust must discharge vertically +or- 10 degrees; Exceptions to this rule would be the use of stock mufflers or rear engine tractors.

12. All fuel lines must be kept away from hot engine components.

13. All ignition points must be covered to protect from chance of fire.

14. All tractors must have sturdy fenders to protect driver from tires.

15. All weights must be securely mounted on stationary weight brackets.

16. All seats must be stationary & minimum 3 inch back rest.

17. All tractors must have adequate stabilizer bars to prevent rear tip over, wheels are allowed, must be strong enough to support tractor and drive at pulling weight. Wheels or pads must be at least 5 inches behind rear tires and not more than 5 inches off of the ground. Use of bump bars is recommended.

18. All tractors must have a sturdy hitch not more than 13” off of the ground. Must have 1 ½ hole and not further back than plain of rear tires.

19. All tractors must have a kill switch mounted at the rear of the tractor and must be easily accessible; it must immediately kill engine and power to electric fuel pump. Must be sturdy ring 1 ½ in diameter.

20. All tractors must have a manual fuel shutoff valve.

21. Flywheels and starter pulleys on all engines turning over 4000rpm must be billet steel or aluminum.

22. All class weights include driver, helmets and coat.

23. All weights must be on stationary weight brackets, no moveable weights.

24. Weights may be repositioned on a false start or re-pull. You must re-weigh if you unhook from the sled.

25. While hooked to the sled, depositing of any equipment onto the track during the course of competition (Driveline Breakage, engine, clutch, rear end, driveshaft, & axles excluded) will result in disqualification.

26 No nitrous oxide or compressed gas of any kind allowed.

27. During the course of competition no part of the tractor can touch the boundary lines or disqualification will result. The sled may go out of bounds. The flagman makes the decision.

28. All engines in all classes must be naturally aspirated, except open, 4cyl, & Super Mod.

29. All classes subject to fuel test and tear down.

30. Top 5 in each class will have a fuel test at random.

31. There is no Smoking or Drinking while pulling. No drinking of Alcoholic Beverages until you are done pulling for the day.

32. It is ultimately the obligation of each participant to ensure that his/her conduct and equipment comply with all applicable rules and regulations.

33. Payout will be made after the pull is done, and all equipment is picked up.

34. NO Tolerance in Rules.  Random fuel tests, RPM,  Kill switch, throttle stop checks, and boroscope cyl checks may be done at anytime.

35. All tractors must pass safety check to be allowed to compete. Must also meet class rules.  If you do not pass all rules – with the discretion of the safety and tech committee you may be allowed to pull that day, but must be corrected by the next event or will not be allowed to pull.

36. A tractor may only have one driver per class, except in the stock youth class.

37. Nothing beyond 96” from center rear axle to farthest point forward including weights in all classes.

38. Driver must sit on tractor seat when weighing in on scale.

39. Front tires must track within the treat of the rear tires, Max width 5 ‘

40. A capable person must be with in arms length while tractor Engine is running.

41. Everyone must help with the duties of the pull, such as flagging, hooking tractors to the sled, and watching the scale.  There will be a help board made each pull – you must check that board for your name and fulfill your duties and if you can’t then you are responsible for finding someone to do them for you.

42. Flag man, sled operator, & /or elected club officials decisions are final.  Arguing with these people could result in event disqualification or suspension. 

43. Flag man & sled operator will stop any pull attempt considered unsafe.

44. Once a class has started no entries will be taken

45. Scratching from a class previous to its start shall constitute a refund.  If you scratch after the class has already started no refund will be made.

46. Points system will be according to however many tractors are in that particular class. For Example: if there are 10 pullers in the class, the winner gets 10 points, 2nd place gets 9 points, and so on until last place gets 1 point. All points go to the tractor, except in the youth class they go to the driver.  A DQ will result in 0 points.

47. Payback is as followed; 50% for 1st place, 30% for 2nd place, and 20% for 3rd place, of 75% of total entry fees. Youth class will pay back 100% of total entry fees, but based on same percentages as above.

48. Please look at class results and line ups on marker boards by scale. Do not bother person taking distances.

49. All pullers must sign own name on release form, if you have 2 or more tractors you must draw for them separately.

50. For safety reasons it is best to have the minor be able to have full control of the tractor. If it needs to be a parent & / or guardian can walk along the side of the tractor to ensure minors safety. This is for stock youth class only.

51. Registrations table will close ½ hr. before the pull is scheduled to start. There will be exceptions made – however there is lots to write and do before the event starts, so if this becomes a problem after the 2nd time being warned, next time you will not be able to participate.

52. There will be a 10’ no man’s land and 15’ safety zone with a total of 25’ between the track and crowd. No one is allowed in the “ No man’s land” or at the end of track during active competion except track officials.

53. All drivers will watch the flagman. They have two flags: Green means that you may attempt your pull, and Red means to stop immediately, or your attempt is over.  There will be two flagmen for the open, and super mod classes.

54. Dead man throttle is mandatory on all tractors.

55. When 3 out of the first 5 tractors make a full pull, class will be restarted. If a class starts and first few don’t full pull and then next several do, officials and sled operator can make decision to restart class to save time.

56. Tow or Chase Vehicle must stay off the track unless tractor is broke – or hooking onto at the end of the pull.

57. In the case of a tie – if you are in the top 3 you will have the choice to either have a pull off, or flip a coin, any tie below the top 3 will be decided by a coin toss.

58. Starter carts shall incorporate a cover over the battery terminals to prevent accidental arcing.

59. All drive chains must be shielded radially, top, front, and rear with 1/8” steel. Shields must be wider than the chain.

60. All drive belts must be shielded radially, top, front, and rear with a minimum of 1/16” steel. Shield must be wider than belt.

61. All super modified and open class tractors must have round metal loops, minimum of two loops.  The 360 degree loops must be a minimum of 1-4’ aluminum or 3/16’ steel, ¾’ wide and not more than 1 1/2'” from the shaft in any direction. Acceptable to use a solid tube ¼” aluminum or 3/16” steel to meet the above requirements.

62. All U-Joints must be shielded 360 Degrees with ¼ “ aluminum or 3/16” steel. The minimum length shall be not less than ½” greater than the U joint assembly.

63. Snowmobile type sheaves (both primary and secondary) must be shielded radially, 360 degrees with a minimum of 1/16” steel. Shielding must be wider than the drive unit and be securely mounted. This shielding may be incorporated with the belt shielding.

64. Driveline mounted disc brakes must be shielded with 1/8” steel or equivalent 180 degrees top and sides.

65. Pro stock, stock alt, pro v-twin, sport stock, stock, stock v-twin, and super modified tractors must have the clutch assemblies covered 360 degrees with 1/8” steel or equivalent. Motorcycle and snowmobile engines, which do not have, clutch assemblies covered (Example open or dry clutch assemblies) will have to be shielded.

66. A deflection shield extending the complete length of the block casting is required on both sides of engine. Shielding must be a minimum of 1/8” steel or equivalent strength aluminum, and be securely fastened. Shielding on inline automotive engines shall extend a minimum of 4” on each side of the crankshaft center; solid frame rails with no holes may serve as part of or all of shield, provided that is covers the required area of block casting. (This rule pertains to Open class)

67. Engine fans must be completely surrounded with a minimum of 1/16” steel or equivalent. Electric fans shall be excluded from this rule. No steel blades allowed, and shielding must be wide enough to contain fan breakage.

68. All open 4 cyl tractors must have clutch covered 360 degrees with 3/16” steel or ¼” aluminum.

69. All automatic transmissions must be covered with a scatter blanket.

70. All 4 cyl open tractors will be required to have steel billet or aluminum billet flywheel with the following mechanical properties: (tensile strength of 60,000 PSI or tield strength of 40,000PSI) Or shrouded 360 degrees with a minimum of ¼” steel from the rear of engine black to the rear of the clutch  area.

71. All Kohler, Wisconsin, etc. type engines that have been modified for high performance, are to have scatter shields opposite the camshaft side of the motor. It must be a minimum 3/16” steel or ¼” aluminum. Minimum dimensions must be from the bottom of engine to 4 ½” above the center line of the crankshaft and must be at least 7” in width. Shield must be attached to the chassis / hood in a secure manner at both top and bottom. Attaching shield solely to the engine shall not meet the minimum requirements. ( Not for the stock class) Cylinder heads must be strapped, with minimum 3/16” steel cable. (Stock and V-Twin class exempt.) NQS dose not require the V-twins to be strapped.
72. Protest Policy - Must complete protest form with specific item, & have cash in hand and must be in that same class. $200 for all stock classes, $300 for all other classes per item.  Prairie Tractor Puller Officials decisions are final. Protest form must be completed and turned into President, End of track flagman, or sled operator with cash. If the tractor is entered in another class tech will be after that class, only the owner, his mechanic, or shootout tech, president or elected club member will be the only people present. 
73. It is mandatory that all drivers attend any and all drivers meetings. A driver that dose not attend may be disallowed to compete accompanying sessions of pulling. Drivers meetings will always be 30 min before pull, usually at scale.
 
 

CLASSES:

 

1350 4Cyl Open

1100 Super Mod (if at least 3 tractors)

1050 Pro Stock (if at least 3 tractors)

1050 Stock Altered (if at least 3 tractors)

1050 Pro V-twin (if at least 3 tractors)

1050 Sport Stock

1050 Stock

1050 Stock V-Twin

950 Stock Youth

1400 4cyl Open

1200 Super Mod (if at least 3 tractors)

1150 Pro Stock (if at least 3 tractors)

1150 Stock Altered (if at least 3 tractors)

1150 Pro V-twin (if at least 3 tractors)

1150 Sport Stock

1150 Stock

1150 Stock V-Twin

1450 4cyl Open

 

All tractors will weigh at or below class weight, driver must be seated when weighing and hitch measured.

 

Stock / Stock Youth Classes:

1. All general and safety rules apply, must be 8 years of age for Stock and ages 4 – 12 for stock youth.

2. The Maximum Rpm for this class is 3800rpm for 15 to 18 hp engines and 4000rpm for 14 hp and lower. RPM’s will be tested at random, zero tolerance.

3. Must maintain stock appearance and utilize stock sheetmetal, Sheetmetal can be changed from brand to brand (john Deere on Cub Frame) but frame can’t be altered.

4. Heads must retain factory gasket lip.

5. Only OEM parts non-altered.

6. Factory Carb for engine it is being used on. No intake standoffs or velocity stacks allowed.

7. Maximum horsepower rating is 18hp, V-twins not allowed.
8. All stock tractors must be commercial lawn and garden type with commercial stock engine(Kohler, Briggs, Tecumsch, Onan) with stock stroke max. of 0.030 inch over bore from engine manufacturer
 
specifications and only OEM approved parts for that engine. pistion
 
must be flush below deck of block, only stock parts for specific engine brand, no modifications of block or head. Stock configuration for that make of transmission, if running a cub cadet tranmission you must
 
have reverse, gear ration change is permitted rear end / transmission has to be mounted in frame stock position, no locked rear ends. 
9. Chassis must be stock frame length, may be modified for engine swap. Front Axle can be factory or tube type, can be moved forward as long as it is within the factory frame, max wheel base is 56 inches.

10. Maximum length is 8 foot from center of rear axle to farthest point forward

11. Stock Youth class only - may have help on track with clutch or getting tractor in gear, once pull has started they need to be off the track.  

13. If you pull in the stock youth class, you can NOT also pull in the reg stock class.

14. Stock Youth Class is the only class that is allowed more than one driver on the same tractor.
15. At the end of the class tractors will have the RPMs checked with zero tollerance, and also checked for reverse.
 
Stock V-twin:

1. All general and safety rules apply, must be 8 years of age.

2. The maximum RPM is 4250. RPM’s will be tested at the end of your hook, zero tolerance.

3. Maximum of 25hp rating flat heard or V-twin. Must use factory stock Carb for engine, No modifications to Carb except adding main jet adjuster, Must use OEM non-altered internal parts.

4. Heads must retain factory gasket lip.

5. Must use factory stock sheetmetal and retain factory appearance. Sheetmetal can be changed for brand to brand (John Deere on Cub frame) but frame can’t be altered.

6. Front axle can be factory or tube type, can be moved forward as long as it is within the factory frame.

7. Frame can be modified for engine swap, rear-end must remain in stock position.

8. Gears can be changed in Transmission.

9. Maximum length is 8 foot from center of the rear axle to farthest point forward – 96”.

10. No Roller Cams

 

Stock Altered:

1. All general and safety rules apply, must be 12 years of age.

2. No RPM limit for this class.

3. Flathead twins & single cyl. engines allowed.

4. 1.2 Carb size. No air entering after 1.2 restrictions.

5. Only Flathead Singles 36.5 cubic inches, Flathead twins 45 cubic inches are allowed.

6. Engines must be factory production or their OEM replacement.

7. Billet Heads allowed on Single Cylinder engines.

8. Must have factory head bolt pattern.

9. No reverse port engines allowed.

10. Max Valve lift is .330” measured at valve stem. Top 5 in class subject to being checked, and are subject to tear down.

11. Max Carb spacer of 1”. Only factory intake manifolds.

12. Must use factory stock sheetmetal, frame and retain factory appearance. Sheetmetal can be changed for brand to brand (John Deere on Cub frame) but frame can’t be altered. Maximum wheelbase of 52”.

13. Must run factory Transmission.

14. Methanol or Gas, No additives.

15. Maximum length is 8 foot from center of the rear axle to farthest point forward.

 

Sport Stock:

1. All general and safety rules apply, must be 12 years of age.

2. No RPM limit for this class.

3. Flathead or V-twin engine allowed.

4. 1.200 Carb size. No air entering after 1.200 restriction.

5. Flathead Singles 38.5 cubic inches, Flathead twins 45 cubic inches and V-twins 39.0 cubic inch, no external welding on heads. Epoxy is ok. No valve restrictions.

6. Must be OEM Engine or it copy (Julian Block, Jones or Woolam).

7. Billet Head allowed on Flatheads only, V-Twins must have OEM heads.

8. Must have factory head bolt pattern.

9. No reverse port engines allowed.

10. Must use factory stock sheetmetal, frame and retain factory appearance. Sheetmetal can be changed for brand to brand (John Deere on Cub frame) but frame can’t be altered. Maximum wheelbase of 56”.

11. Must run factory Transmission.

12. Methanol or Gas, No additives.

13. Maximum length is 8 foot from center of rear axle to farthest point forward.

 

 

Pro-Stock:

1. All general and safety rules apply, must be 12 years of age.

2. No RPM limit for this class.

3. Single Cylinder 50.5 cubic inches or smaller engines.

4. 1,200 Carb Size. Must be Kohler Type Carb. No air entering after 1,200 restriction.

5. Must be OEM Engine or its copy (Julian Block, Jones or Woolam).

6. Must be factory stock sheetmetal, frame and retain factory appearance. Tube frames permitted according to NQS rules.

7. Maximum wheelbase of 56”.

8. Must run factory Transmission.

9. Methanol or Gas, No additives.

10. Maximum length is 8 foot from center of rear axle to farthest point forward.

11. Must have grill and hood.

 

Pro V-Twin:

1. All general and safety rules apply must be 12 years of age.

2. No RPM limit for this class.

3. 45.5 Cubic Inch. Must be OEM Block or its copy.

4. OEM or Recast Heads allowed.

5. Any single Carb.

6. Any Cam Any Lift.

7. Maximum Wheelbase 56:, Maximum length 8’ from center of Rear Axle to farthest point forward.

8. Must have Grill and Hood.

9. Must run Factory Transmission.

10. Any Tractor Legal for Sport Stock can compete in this class under there own rules.

 

Super Mod:

1. All general and safety rules apply, must be 16 years of age.

2. No RPM limit for this class.

3. Motorcycle, Snowmobile or Garden Tractor Engines only air or water cooled, max of 4 cylinders (can be 4 singles or 2 twins).

4. Maximum engine displacement is 1500cc total.

5. Maximum of 4 barrels of carburetion total.

6. Methanol or Gas, No additives.

7. Maximum length of 8 foot from center of axle forward.

 

4 Cylinder Mini-Rod Open:

1. All general and safety rules apply, must be 16 years of age.

2. No RPM limit for this class.

3. Maximum of 4 cylinders. Must be OEM type automotive engine cast or aluminum, motorcycle, or snowmobile engines.

4. Maximum of 2 or 4 valves per cylinder, maximum of 1 spark plug per cylinder.

5. Maximum length of 8 foot from center of rear axle to furthest point forward.

6. Methanol, Gas, or Diesel, no additives, subject to fuel test.

7. Super Modified tractors can run in this class under there own rules, and may add 50lbs.

 

 

Questions:

 

Ken Long – President

Blairstown, IA

319-454-6397 – home

319-361-0642 - cell

nightmarepulling@hotmail.com

 

 


 

Tech & Safety Committees:

John Yoder

Jim Malmberg
Jason Johnson

 

 

www.prairiepullers.com