Central Minnesota Pullers

Click here to edit subtitle

Central MN Pullers LLC

2019 General Rules for All Classes

Clarifications and rule changes are in bold red


1. A designated safety inspector and/or class representatives will conduct random inspections throughout the season. Inspector and class reps have the right to check tractors for any item in the rules or weight. They may request tractors to run across the scale at any pull. You will be disqualified if you are in violation of any rules or safety regulations.

2. Drivers must meet the following requirements to be allowed to hook:

a. Be a professional.  No consumption of alcohol until all pulling by contestant is completed. Unsportsmanlike conduct will result in one year and one week suspension, with no refunds.

b. Helmet required.

c. SFI approved fire suit – jacket and pants.

3. Tractors must meet the following requirements to be allowed to hook:

a. ROLL CAGES ARE REQUIRED. Roll cage must enclose the driver comparable to SFI specs. 

b. 5-POINT DRIVER HARNESS REQUIRED. Harness must be SFI approved.

c. Tractor must be equipped with minimum of one 2.5-pound dry-powder type fire extinguisher, fully charged, with gauge in working condition, and convenient to operator.

d. Kill switch must be installed and working. 

e. Tractor will have a battery disconnect switch. 

f. All drivers must be able to shut down tractor from driver’s seat and tractor must have safety disconnect at the rear of tractor where the skid hooks onto tractor.

g. Tractors that use alcohol as fuel will identify this by placing a 2 inch contrasting letter A in a contrasting color or an “alcohol” placard on the fuel tank of the tractor. Promoters must be made aware of any tractor that uses alcohol. Their insurance requires this – the fire department handles alcohol fires differently.

h. Reverse Light – 2” white light.

i. Neutral safety switch required.

j. Dead man throttle (springs) required.

k. All vehicles will be equipped with wheelie bars. 

i. Must be strong enough to support the weight of the vehicle.

ii. When backing up to the skid, either wheelie bar or rubber stop should hit the skid not the tires.

l. NO cast hubs allowed.

m. Wide front ends required on all tractors except hot farm.

n. No portion of a tractor may go beyond 13 feet from the center of the rear axle.

i. Modified tractor classes are allowed 14 feet.

o. Hitch height must be maximum 20” at hook point and must be minimum 18” from center of rear axle.

p. Must have frame tie bars if the tractor doesn’t have continuous frame to the transmission.

q. Must have fenders that will support the weight of the driver and protect from contact with tires.

r. All drivelines and exposed shafts will be enclosed in 3/8” aluminum or 5/16” steel.

s. Unaltered SFI approved safety blanket around fly wheel and clutch assembly.

t. Will sign a warrant of clutch, flywheel, pressure plate, and bellhousing statement that are equal to or exceed minimum safety requirements. Positively no gray cast iron allowed, must be made of steel, aluminum, or ductile iron. 


4. Piston Engines 

a. NO forms of nitro methane.

b. Both sides of all piston engines will have minimum .060 side shields from base of head extending below bottom center of crankshaft throw and be securely fastened.

c. Turbo charged engine must have (2) 3/8 inch bolts (Grade #5) in vertical portion of exhaust pipe(s). Bolts to be installed 90 degrees, and within one inch of each other.

d. All turbo charged engines are required to have one cable that must surround the engine block and head. This cable must be placed between first and second cylinder through exhaust manifold port area.

i. Cable must be minimum of 3/8 inch thickness, cable must have a minimum of (2) clamps at the splice.

e. All turbo charged engines must have a 3 way dump valve before fuel pump.


5. Turbine Engines 

a. Only T-53, T-55, T-58, T-64 and JFTD-12 turbine engines are allowed in CMP competition. (No homemade turbines)

b. No turbine engine will use a clutch/flywheel assembly or an automatic transmission.

c. Exhaust pipe must extend a minimum of six inches above top of engine opening and diameter to be no smaller than 1” of engine outlet.

d. All air intakes shall be screened with a metal screen having a 3/16 inch or smaller openings.

e. No turbine engine and governor setting will be operated beyond military temperature and RPM limits.

f. Each turbine engine is required to have an over-speed shutdown consisting of a speed monitor activating a normally closed solenoid valve located between the fuel control and fuel manifold. The trip setting to be low enough to prevent over-speed in case of driveline failure.

g. All turbine engines must have a 360 degree steel or composite shroud containment system securely fastened around the turbine hot section.

i. Steel shroud a minimum of 3/8 inch for engines below 1500 hp and a minimum of 1/2 inch steel for 1500 hp and above.

ii. Composite Shroud System- T-53 and T-55 require 25 layers of 328 weave Kevlar 29 material or current replacement number. T-58, T64 and JFTD-12 require 40 layers of 328 weave Kevlar 29 material or current replacement number. Numerous bolts inserted through the three segments (metal/ Kevlar/ metal) are required.


6. CMP is incorporated as a limited-liability corporation in the State of Minnesota.  

a. CMP LLC will take full responsibility for any mishaps.


7. CMP is governed by a board of directors elected to a 3-year term.


8. CMP Board of Directors will decide all controversies.


9. Tractors are allowed two hooks per event.


10. Entry fee at each pull will be paid by the puller and will be advance entry fee price since CMP member’s names are sent to promoters prior to the pull. The promoters of point’s pulls will be sent a list of drivers and tractors prior to the pull and the order they will pull in. There is no need for CMP members to sign up ahead of time at a points pull.

a. Registration closes 30 minutes before the event start time.  If you haven’t registered you will not pull.  If you are unable to register in time you must call/text 320-248-1536 thirty (30) minutes before event start time to make arrangements to register.

b. If you cannot make it to a pull, please notify CMP secretary so they can get the information to the promoter. Call /text 320-248-1536, e-mail [email protected]


11. Membership fees:  

                          $ 35.00 per tractor, per class ($70.00 for 2 classes) 

                          $ 60.00 per tractor per class ($120.00 for two classes) for spectator liability insurance

                          $ 35.00 for non-member one time hook fee per class


12. CMP classes: 

Limited Modified 6200#        Improved Stock 11500#

Modified 6000#                     Modified 6500#

Light Super Stock 6500#      Light Super Stock 7000#

Open 8500#                         Open 9000#

Pro Farm 9500#                   Pro Farm 10,000#


13. Weight will be certified at or before first pull of the season.  Members will be notified in advance of location for safety inspection and weigh-in.


14. Board of Directors can have a class weighed or inspected at any time.


15. Anyone found cheating will be disqualified and no place money or points will be granted for the pull.


16. Protest fee will be $150 for all weight and/or rules challenges. All tractors for that class will go across the scale and be inspected.


17. Regulations of the track:

a. Track must be minimum 30’ wide.

b. Track must have boundaries marked with chalk, stakes, or both.

c. 75’ Retry (must attempt to stop by 75’) 

d. Track flagman must be visible, an orange vest is recommended.

e. Must have first responder on site.


18. If you choose not to pull because of track conditions – you do not receive points for that class.


19. If your tractor breaks in the light class and you cannot pull again, you will receive hook points and last place points for your heavy class.


20. If a tractor is unable to hook in the class it is registered, NO points or purse money will be paid.


21. First puller in each class will have the option to pull again.   This decision must be made by the DRIVER immediately following their first pull before leaving the sled, returning as last hook of their class.


22. A vehicle will hook to the sled within 5 minutes after the sled is reset.  If unable to hook the vehicle will be allowed to drop to last position in the class.

a. The last vehicle in each class will be given six (6) minutes to hook and make an attempt after the sled has been reset.


23. Disqualification out of bounds is given only if the tractor goes out of bounds, not if the skid or skid flaps goes out of bounds

a. Full points and prize money will be awarded by CMP 

b. When disqualified for out of bounds, a driver will receive last place points and purse for last place if there is purse money not awarded to non-disqualified drivers.  If more than one driver is disqualified points will be split between the drivers and any purse money purse money will be split between the disqualified drivers.


24. Promoter cost -$4500 or $6200 for club event depending on the option the promoter chooses.


25. Points awarded: 

1st place 15 points + 15 hook points = 30 points

                          2nd place 14 points + 15 hook points = 29 points

                           3rd place 13 points + 15 hook points = 28 points...And so on. 


26. Points are awarded to competition vehicles, not drivers.  

a. All vehicles must be registered for each points class and CMP insurance for the year paid before points can be earned. No back dating payments for points. 

b. All drivers of a competition vehicle must be a paid member or pay per-hook fee for each class.


27. Competition Vehicles must hook 50% or more of annual CMP points events to receive end of year points payout.


28. You will not receive points until any payment due is in CMP’s possession. It is advised that you pay your membership and/or insurance dues prior to the first pull so there are no controversies or conflicts.


29. To be eligible to vote, membership must be paid at annual meeting.


30. Banquet is the first Saturday in December. Annual Meeting is in January.  Check CMPpullers.com for date


Class Rules



Limited Modified 6200#

1. ALL GENERAL RULES APPLY

2. Engines allowed

a. Single automotive OEM engine

i. No more than 525 CID.

ii. OEM cast iron block Ford, GM or Mopar.

iii. Production heads either cast or aluminum.

iv. Any type of carburetor or injection and manifold set up is allowed.

v. No blowers or turbos allowed. Only natural aspirated engine.

iv. Fuels: Race gas or Methanol allowed as fuel. No diesel fueled engine.

vii. Single stage nitrous injection allowed.

b. Single agricultural OEM engine

i. Tractor must have OEM engine block cylinder head, transmission and rear-end housings.

ii. Any carburetion is allowed on NA engine

1.No fuel injection.

iii. No cubic inch limit on naturally aspirated engines.

iv. Turbo diesels are limited to 360 cubic inches, no de-cubing allowed.

1. Turbo diesels limited to one turbo, not larger than 2.3 intake.

2. Turbo diesels limited to one injection pump not larger than Bosch A-series.

v. Steel flywheel and pressure plate 

6. Tire size limited to a maximum of 30.5 x 32 Agricultural tires. 

a. Any tire type allowed (cut, double cut, etc) 

7. Any rear end style allowed.

8. Can also hook either 6000# or 6500# Modified Tractor Class, but not both.



Modified Tractors 6000# & 6500#

1. ALL GENERAL RULES APPLY

2. Maximum tire size 30.5 X 32

3. Gas/Alcohol automotive style engine (s).

a. Single engine - allowed single stage forced air induction or multi-stage nitrous oxide systems.

b. Multiple engines - Engines must be naturally aspirated.

i. Single stage nitrous allowed.

4. Turbine engines

a. Limited to 1500 rated horsepower per NTPA spec.



Light Super Stock Tractors Diesel/Alcohol 6500# & 7000#

1. ALL GENERAL RULES APPLY

2. Maximum tire size 30.5 X 32

3. One engine, OEM cast iron block, multi-chargers for that make of tractor. 

4. Turbo charged engine must have two 3/8 inch bolts (Grade #5) in vertical portion of exhaust pipe(s). Bolts must be installed 90 degrees to each other, within one inch of each other. 

5. Diesel fuel tractors get 200# grace. 

6. Turbo charged engines are required to have one cable that must surround the engine block and head. This cable must be placed between first and second cylinder through exhaust manifold port area. Cable must be minimum of 3/8 inch thickness and minimum of two clamps and/or swedge at the splice.

7. Must have a 3-way dump valve before fuel pump. 

8. All drivers in this class must be able to pull the air and fuel shutdowns from driver’s seat. Air and fuel must shut down from rear of tractor where skid hooks onto tractor. 

9. One six-cylinder injection pump. 

10. Must look like a tractor.



Open Tractors 8500# & 9000#

1. ALL GENERAL RULES APPLY

2. Maximum tire size 30.5 X 32   

3. No engine restrictions.

4. Any combination of engines, transmissions and final drives.  

5. Make Weight – Pull



Pro Farm 9500# & 10000#

1. ALL GENERAL RULES APPLY

2. Maximum tire size 20.8 X38

3. Diesel fuel only. 

4. OEM block and head.

5. Water injection allowed.

6. No overhead cams allowed.  Maximum 2 valves per cylinder.

7. Turbo restrictions: Turbo must have a 3 inch maximum ID pipe with a 3” minimum length before the turbo no more than 3” from the face of the wheel. All inlet and exhaust air must flow through this restriction.

8. The maximum allowed size pump for diesel injection is a p-pump (no aftermarket housing). Only one plunger per cylinder allowed.

9. All drivers in this class must be able to pull the air and fuel shutdowns from driver’s seat. Air and fuel must shut down from rear of tractor where skid hooks onto tractor.



Improved Stock 11,500#

1. All general rules apply except the following:

a. 3-way dump valve – See rule #10

b. Deadman throttle- Not required, but highly recommended

c. Cast, wedge lock, pressed, and welded hubs allowed

d. Roll cage- See rule #2

2. ROPS with seatbelt or Roll cage with 5-point required. 

a. ROPS must be factory or factory equivalent. 

3. Stock appearing - block, driveline, transmission, front axle, rear end and sheet metal. 

a. All must match make and model of the manufacturer.

4. Engine must have with OEM Ag head, intake & exhaust manifolds

5. One turbo with a Maximum inlet of 2.8”and Maximum outlet size of 3”.

6. Stock appearing fuel injection pump. 

a. No P – Pumps allowed.   

7. Agricultural tires only. Maximum tire size of 20.8x38 

a. Leading edge and/or face of tire lugs may NOT be cut, sharpened or modified in any way, shape or form. 

8. Water injection allowed.

9. No intercoolers, aftercoolers and/or ice boxes.

10. Must have fuel shutdown before pump. 

a. Shutdown must be convenient and accessible to driver. 

11. Air shut down also required from rear of tractor where skid hooks onto tractor.

12. If SFI safety blankets are not used, drive train components must have 360 degree steel shroud of 3/16 inch or greater.

13. Can also hook either 9500# or 10000# Pro Farm class, but not both.