2021 Michindoh Truck and Tractor Pull Association Rules

Rules as of 1/15/2021

All changes highlighted in yellow.

General Rules:

1. Michindoh Classes are:

6,000lb. Stateline Pro Street 4x4 (points class)

6,200lb. 2wd Super Stock (points class)

6,200lb. 4wd Altered Stock (points class)

5,200lb. 2wd Pro Street (points class)

9,500lb. Hot Farm Tractors (points class)

5,500lb. Michindoh Modified Rails (points class)

8,000lb. 2.6SB/2.5 Workstock (points class)

Open (see rules) 100% Payback

2. If at the end of a given pulling season, any point’s class that had an average number of entries less than 3 over the course of that season. That class will be transitioned to a 100% payback and will not be a point’s class for the following season or may be dropped.

3. Class rules will not change throughout the current year unless there is a safety issue with a rule. The decision of the board to change a rule deemed to be a safety issue will require a majority vote of the board.

4. All drivers and vehicles in Michindoh classes must be paid Michindoh members and

possess a Michindoh pulling vehicle number.

5. Classes will have a random pulling order from event to event.

6. Drivers in all classes must be entered before the start of the pull. Late entries for all

classes: If not registered ½ hour before posted start time, you will be fined $20.00 for late

entry fee.

7. If you cannot be at the pull on time, you may pre–enter by contacting someone who can

be there on time.

8. If you break before your class starts, your entry fees will be refunded.

9. NO refunds after class starts.

10. The driver who is on the entry form MUST be the driver in the vehicle. If a substitute is

required, you must notify Michindoh officials before the vehicle is pulled up to the sled.

11. Drivers that make a full pull MUST be the drivers in the pull off. NO substitution will be

allowed or the pull will be disqualified.

12. For general safety, the Head Tech Official and/or class tech official may inspect a vehicle

at any time. This includes, but does not limit to: pumping for cubic inch, checking the

fuel system and any safety item, under the hood or in the drive train. All

owners/representatives of all vehicles at any pull site must allow an inspection to be done

in his presence. A random pump ball will be used during registration to select who will

be pumped. Anyone who refuses will be in direct violation of this rule and will be subject

to disqualification under protest teardown rules.

13. Only the official operating the pump and the owner of the vehicle being pumped will be

allowed near the vehicle while being pumped.

14. As soon as the sled returns and/or the start line officials call you, drivers must be ready to

pull. The driver will have THREE MINUTES to hook to the sled and tighten the chain.

After this time, the pull will be forfeited.

15. Contestant will be allowed 2 attempts to start the sled within the first 100 feet of the pull,

at the discretion of the starting flagman. Only 2 attempts allowed to start the sled in the

event of a pull off. Vehicles’ are not allowed to return to the pits if involved in a pull off.

16. The total weight of the pulling vehicle includes driver.

17. Driver’s meeting takes precedence over all written rules.

18. Idle speed only while driving in pit area.

19. All electric fuel pumps must be connected through the kill switch.

20. All pulling vehicles must have a 3–1/4” wide x 3–3/4” deep opening due to NTPA rule

changes on weight transfer hooks.

21. All pulling vehicles must have reverse lights (white lights) and neutral start switches.

Light should be mounted near hitch. This is mandatory for all classes.

22. There will be no “gimme” hooks for any driver or vehicle.

23. All vehicles must have a working fire extinguisher.

24. Board of Director has precedence over all.

25. All drivers must wear approved helmets and seat belts.

26. All drivers must have valid state drivers license.

27. An owner cannot change vehicle and keep same vehicle number and or transfer points.

28. With an incorporated safe shut down area, all tracks will be 300 ft long whenever

possible. Rather than starting a class all over, the head judge and sled operator may

utilize some of the shut down area to extend the finish line to a floating finish if the sled

is set properly, as long as the sled will stop the class within 30 ft of the original finish

line. A pulling track may be shortened from 300 ft, to maintain a 100 ft minimum

shutdown.

29. Vehicles must have a one piece, 1/4” hydro form bell housing on any straight shift. If any

modifications are made, modified area must be ground smooth inside and out. All

vehicles using a clutch and flywheel assembly will run a full block saver plate of 1/8”

steel, with all bolts possible installed. Diesel powered vehicles are exempt from this rule.

30. All flywheels must be steel or aluminum and SFI approved. No cast stock flywheels

allowed. Each vehicle owner will sign a waiver on the membership form stating that they

are running a SFI approved flywheel.

31. All automatic transmissions must have SEMA approved scatter blanket and SFI approved

flexplate.

32. Block spacers to accommodate multiple disc clutches must be as substantial as the block

flange to retain flywheel. This will be at the tech official discretion.

33. All vehicles must have easy and ample access to hitch to hook chain.

34. All Reese style hitch inserts must be a class 5 or solid insert. With no movement in any

direction.

35. Any engine to be pumped or torn down is allowed 1% max tolerance, due to inaccuracy

of our measuring devices.

36. All vehicles must have working hydraulic brakes capable of sliding the tires when

applied.

Michindoh Points System

The point’s structure is as follows:

1st 15 place points + 15 hook points /11th 5 place points + 15 hook points

2nd 14 place points + 15 hook points /12th 4 place points + 15 hook points

3rd 13 place points + 15 hook points /13th 3 place points + 15 hook points

4th 12 place points + 15 hook points /14th 2 place points + 15 hook points

5th 11 place points + 15 hook points /15th 1 place points + 15 hook points

6th 10 place points + 15 hook points /16th and lower will receive zero place

7th 9 place points + 15 hook points / and 15 hook points

8th 8 place points + 15 hook points

9th 7 place points + 15 hook points

10th 6 place points + 15 hook points

Points Rules:

To be eligible for 15 hook points, the competitor must compete in a point’s class, and

have paid an entry fee, passed inspection, and paid full Michindoh membership dues.

Points are awarded to the vehicle, not to the driver. Each pulling vehicle will receive

placing point at each pulling event. First place will be awarded 15 points, Second place will be

awarded 14 points, and so on.

If a pull is cancelled, 15 “show up” points will be issued to those vehicles already

entered. At the end of season, all competitors will drop their lowest “place points” from the

season. The competitor’s lowest place points may include a missed event. “Show up” and

“Hook“ points cannot be dropped.

At the end of the pulling season if there is a tie in points between vehicles in the same

class, the distances that each of the vehicles pulled at each of the events will be added

together. Whoever has the furthest total distance will be awarded the points championship

On–track disqualifications (i.e. out of bounds, loss of weight, etc) will receive last place

points and last place payout in class. If there is more than one entry disqualified in a given class,

the last place points and payout will be divided equally among the disqualified entries.

Protest and Tear Down Rules:

You may protest (if you are Michindoh member in the same class) to have any

vehicle pumped the night of a pull by presenting $350.00 to the president or vice

president present. If found to be illegal by the pump, the owner may tear down the

engine at their expense to prove it legal or be barred from competition for one year from

violation. If the vehicle in question is found to be legal it will keep the $350.00 pump fee.

You may also protest to have a vehicle torn down (if you are a Michindoh

member in the same class). The person protesting must bring $750.00 cash to the

president or vice president present. The protest will be discussed. If the vehicle in

question is to be torn down, it will have the option to do it at the track or at the nearest

suitable location. The vehicle or engine will be impounded until the tear down. The tear

down must happen with–in three days of the protest. If the vehicle in question is found to

be legal, all protest fees will go to the owner.

Any vehicle found illegal and/or refuses to be protested or teched, will be barred

from competition for one year from violation. Unless, they are willing to pay a

reinstatement fee of $500.00 to the club and prove the vehicle is legal. Any money and

points won the day of the protest will be returned or withheld by the club. If the vehicle

in question refuses to refund winnings, the amount of those winnings will be added to

the reinstatement fee.

The tech–official for the class has the right to check any vehicle they feel may be in

violation of any rules without a protest fee with the permission of the board of directors.

Causes for Disqualification:

1. Loss of anything off the vehicle (i.e.: weights, parts, etc.) while it is in motion, except in

the case of breakage in the drive–line, until red flag is waved.

2. Loss of safety equipment or failure of safety equipment to function.

3. Excessive loss of liquid or steady stream, except in the case of internal breakage.

4. Illegal fuel and use of Nitrous Oxide.

5. Any part of your vehicle out of bounds from start to finish while under the green flag.

6. Unsafe operations of any vehicle in pits or on track (i.e.: no hole shots, excessive speed,

etc.)

7. INTOXICATION of any driver or pit crew member or any smell of alcohol on a driver’s

breath.

8. Illegal equipment.

9. Leaving starting line under red flag.

10. Un–sportsman like conduct.

11. No reverse in vehicle.

12. If DQ for cheating, all points and money will be forfeited.

13. If a DQ vehicle will receive last place points in the class, and if more than 1 vehicle is

DQ, they share at the bottom of the list in the same order they were otherwise. Out of

bounds only.

Track Preparation:

A Michindoh safety tech or officer will be in charge of track preparation and

maintenance. All event personnel will be under their supervision. Failure of event

personnel to comply will mean cancellation of the event. This rule has been added to

provide better pulling tracks. Michindoh members will also be required to assist the

officers with other track work as needed at the pulls, such as lining up pulling vehicles,

flagging, etc.

6200lb. 4wd Altered Stock

Rules locked, 2021

With the exception of safety requirements approved by the board.

Must also follow all general rules listed above.

1. Hood modifications and upright headers are acceptable.

2. Tires must be D.O.T. approved for highway use and uncut. No recaps.

3. Protest rules in effect.

4. The decisions of the pulling officials are final.

5. Kill switches are mandatory. Electric fuel pumps must be wired through the kill switch.

6. Trucks must have a full body, no flat beds, if bed floor is removed it must be covered and

not visible to spectators.

7. Will allow racing seat.

8. Fuel tanks are allowed to be in front of vehicle if they are S.F.I. and have braided hoses

and pressure coupler. Batteries may be mounted out in front of the truck but battery must be

enclosed. No Batteries in cab.

9. All drivers are required to wear full face helmets and jackets and pants with a SFI rating

of 3–2a–1. Shoes also recommended.

10. All drivers are required to wear seatbelts.

11. All vehicles must have a working fire extinguisher.

12. No tilt bodies are allowed.

Weights:

1. Front weights to be a maximum of 60” from center of front axle.

2. No loose weights in cab.

Hitches:

1. Maximum hitch height is 26 inches, & minimum 42 inches from center of rear end

maximum of 48 inches.

2. You must use a steel plate hook point with a minimum 3 ¼ wide 3 ¾ deep hole.

3. Pivot point of hitch cannot be forward of center of rear axle. It must be below top of frame

rails, and hook point must be behind frame rail or body.

4. Hitches must be tight and have no movement in any direction.

Engines:

1. Maximum 514 cubic inch limit.

2. Any single four–barrel carburetor is allowed.

3. No turbochargers or superchargers.

4. No fuel injection unless factory equipped.

5. Cast iron block and heads only, except FORD FE allowed to run aluminum cylinder heads.

6. Aluminum intake may be used.

7. No pressurized fuels. No methanol alcohol fuel.

8. Front of engine block cannot extend more than 10 inches of the center of the front axle.

Front axle must be in stock location.

Harmonic Balancer:

1. All engines must be equipped with a harmonic balancer or dampener meeting SFI

Spec18.1.

2. All vehicals are required to shield all rotating mass mounted on the front of the

crankshaft, if unobstructed. Shields to be from frame rail to frame rail and top to

bottom. Shields to be a minimum of .125” steel or aluminum fastened by at least 2

evenly spaced 3/8” grade 5 bolts.

Transmissions & Drivelines:

1. Maximum wheel base 134 inches center to center.

2. Stock type one ton or two ton drive–lines are permitted. No planetary.

3. Drop box’s are allowed. Reverses are not allowed.

4. May block frame solid.

5. Must have scatter proof bell housing or automatic transmission blanket, and S.F.I

flywheels.

6. No tube chassis are allowed.

U–joint shielding:

1. All u–joints and yokes must have a 360 degree cover, at least 6” long (covering entire

yoke and u–joint), 1/4” thick steel (3/8” thick aluminum). Inside diameter of shield will

be no more than 2" larger than u–joint. If cover is cut in half it must be fastened no farther

than 1” from ends with at least 3/8”– grade 8 bolts. Must be bolted a maximum of 6” from

bolt to bolt. All intermidiate shafts need covered 360 degrees. NO HINGE STYLE

fasteners permited. Must be securly fastened.

Drive shaft loops:

1. Drive shaft loops required (3/4” or wide), 1/8” or thicker steel (1/4” or thicker

aluminum). No more than 2” larger than the largest u–joint. If cut in half, must be bolted

within 1” from ends and a maximum of 16” apart from loop to loop (multiple loops). If

using a one piece cover it must be bolted a maximum of 6” apart the entire length and at

least 1” from ends. All fasteners must be at least 3/8”– grade 8 bolts. NO HINGE STYLE

permited. Must be securly fastened.

ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED

DUE TO YOUR SAFETY AND THE SAFETY OF OTHERS.

THE OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce all

of the rules! Every vehicle will be teched on a random basis at

some point throughout the season.**

6200lb. 2wd Super Stock

RULES LOCKED 2021

With the exception of Safety requirements approved by the Board.

Must also follow all general rules listed above.

Engines:

1. Maximum single 514 cubic inch 1% tolerance, naturally aspirated V8 engine.

2. Cylinder heads: two valves and one spark plug per cylinder. Aluminum heads are allowed. No

less than 24 degree head. No Hemi heads.

3. Legal aluminum heads: CHEVROLET: dart–320, 360, and Pro 1, Brodix 1 & 2, and all

Edelbrock. FORD: Cobra jet, Blue Thunder and TFS A460. CHRYSLER: Indy 444–1. Not

limited to these heads, but must meet A & B.

3a. Must have cast aluminum manifold.

3b. Must except stock rocker arm assembly.

4. The front of the engine block cannot extend more than 160 inches forward of the center of the

rear axle or 20 inches forward of the center of the front axle.

5. One carburetor, gasoline only, no pressurized fuels, no methanol.

Harmonic Balancer:

3. All engines must be equipped with a harmonic balancer or dampener meeting SFI

Spec18.1.

4. All vehicals are required to shield all rotating mass mounted on the front of the

crankshaft, if unobstructed. Shields to be from frame rail to frame rail and top to

bottom. Shields to be a minimum of .125” steel or aluminum fastened by at least 2

evenly spaced 3/8” grade 5 bolts.

Hitches:

1. Maximum height 30 inches.

2. Minimum 36 inches behind center of rear axle.

3. Maximum 48 inches behind center of rear axle.

4. Pivot point of the hitch can not be forward of the center of the rear axle.

5. Must be rigid at all hook points.

6. Must be no smaller than a 3 ¼ deep 3 ¾ wide opening at the hook point.

Tires & Wheels:

1.Can run any size street legal DOT tire. Maximum size 35x12.50 or 315–70–16 metric. Can run

34X18.0X15 pulling tires allowed.

2. No split rims; snap rings or dual wheels.

Transmissions & Drivelines:

1. Stock altered frames. No tube chassis.

2. Maximum wheel base 140 inches center to center.

3.All u–joints and yokes must have a 360 degree cover, at least 6” long (covering entire yoke and

u–joint), 1/4” thick steel (3/8” thick aluminum). Inside diameter of shield will be no more than 2"

larger than u–joint. If cover is cut in half it must be fastened no farther than 1” from ends with at

least 3/8”– grade 8 bolts. Must be bolted a maximum of 6” from bolt to bolt. All intermidiate

shafts need covered 360 degrees. NO HINGE STYLE fasteners permited. Must be securly

fastened.

4. Drive shaft loops required (3/4” or wide), 1/8” or thicker steel (1/4” or thicker aluminum). No

more than 2” larger than the largest u–joint. If cut in half, must be bolted within 1” from ends and

a maximum of 16” apart from loop to loop (multiple loops). If using a one piece cover it must be

bolted a maximum of 6” apart the entire length and at least 1” from ends. All fasteners must be at

least 3/8”– grade 8 bolts. NO HINGE STYLE permited. Must be securly fastened.

5. Must have a fully enclosed S.F.I. approved explosion proof bell housing on standard

transmission.

6. Must have S.F.I. approved flywheels for both automatic and standard transmissions.

7. Automatic transmissions must have S.F.I. approved flywheel shield and transmission blanket,

or tunnel shield.

8. Any rear axle is allowed.

Weights & Safety Rules:

1. Weights can be mounted anywhere on the truck in safe manner. No Loose weights in cab.

2. Weights cannot extend more than 60 inches forward of the center of the front axle, or any part

of the truck.

3. Driver must wear seatbelt.

4. Batteries must be in protective case and must have a battery disconnect switch on outside if

mounted in front. No batteries in cab.

5. Must be mounted and working fire extinguisher in the cab.

6. No gas tanks in the cab.

7. Must have working kill switches and they will be checked.

8. Brakes must hold vehicle.....steering brakes are allowed.

9. Must have radiator overflow.

10. Drivers must be at least 16 years of age and have a valid driver’s license.

11. No car bodies, vans, blazers, broncos, or fiberglass bodies allowed. With fiberglass hoods

being the only exception.

12. Hood required covering as much area as possible.

13. Engine side shields required (.100 for steel and .125 for aluminum), unless inner fenders are

installed.

14. No holes in firewall or floor larger than 1 inch.

15. Balancer must be S.F.I. approved or covered 360 degrees.

16. Nerf bars at least 8 inches behind clevis or body to prevent injury.

17. Fuel tanks are allowed to be in front of vehicle if they are S.F.I. approved and have

braided hoses and pressure coupler.

18. 2wd– must have wheelie bars. Maximum ground clearance of 6", and 18" behind rear end.

19. All drivers are required to wear full face helmets, jackets, pants with a SFI rating of 3–2a–1and 3.3/5 shoes recommended.

ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED DUE

TO YOUR SAFETY AND THE SAFETY OF OTHERS. THE

OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce all of the

rules! Every vehicle will be teched on a random basis at some point

throughout the season.**

6000 lb. Stateline Pro–Street
4wd Rules locked 2019, 2020, 2021

With the exception of safety requirements approved by the board. Must also follow all general rules listed above. General Rules:

1. Drivers must wear approved full face helmet, approved fire jackets and pants with a SFI rating of 3–2a–1, and seatbelts, SFI shoes recommended.
2. Cowl induction hood allowed–No open holes.
3. Tires must be D.O.T. approved for highway use 33x12.50 inches, or 305–70–16 metric maximum tires size. No cut tires, No boggers. No recaps.
4. One ton driveline or less, u–joints, driveshaft, rear end, transmission and transfer case. Trucks must have complete suspension in factory location with at least 1” of travel but may be temporally blocked to pull. All rear–end bars must be forward of rear axle.
5. No special bumpers, snowplow hook ups, or brush guards. Front bumper must be in stock location and nothing protruding beyond the bumper.
6. The decisions of the pulling officials are final.
7. Trucks must have reverse lights of some sort.
8. Must have scatter–proof bell housing or blanket, and a kill switch.
9. Any unsafe manner of vehicle (on or off track) will be disqualified.
10. Top 3 placing trucks may be teched after pull. Any truck in violation will forfeit placing and hook fees, Tear down and protest rules apply.
11. Fuel cells can be added but must be secured inside the bed or under the bed.
12. Front axle must be in factory location, maximum wheelbase 134 inches. No narrowing of the front or rear axle, 3 rear leaf springs minimum. (No moving axles or transmission or engines).
13. Truck must have a full body. No gutting of truck. Trucks must have full bed anda solid floor made of metal or wood with rear inner fenders and all factory glass. No flatbeds.
14. Any truck that has been lightened in any way may be penalized by adding weight to the rear of the vehicle at the discretion of the tech official.
15. All vehicles must have a working fire extinguisher.
16. Must have working hydraulic brakes.
17. No batteries in cab.

Weights:



1. Weight can be added, but must be secured and not visible in the front of the vehicle. Weight must be secured and can be visible in the bed of the truck.

Hitches:

1. Hitch is to be no more than 20 inches off the ground, and hook point must be 42 inches minimum from center rear axle. All vehicles must have easy and ample access to hitch to hook chain. Pivot point of hitch cannot be forward of center of rear axle and must be below top of frame rail. No bars or chains from hitch to axle. All bars or hitch components must fasten to the frame rail only. Hitch opening must be 3 ¼ wide by 3 ¾ deep.
2. Hitches must be tight and have no movement in any direction.

Engines:

1. Maximum 472 cubic inch, naturally aspirated.
2. Single four barrel carburetor, maximum 4150 flange allowed. No Dominator, King Demon, or predator carburetors allowed.
3. No fuel injection.
4. Cast iron block and heads must be used. No aluminum blocks factory aluminumheads are allowed. All blocks and heads must have OEM part number. Any production block. No Merlin, Dart, Bowtie, or SVO parts. No hemi heads.
5. Aluminum intakes are allowed.
6. Headers are allowed must exit down and back.
7. Electric water pumps are allowed.
8. Race fuel is allowed, No alcohol, LP, or Nitrous oxide.
9. All engines are required to have a S.F.I. approved balancer and flywheel.
10.Front of engine block cannot extend more than 10 inches of the center of the front axle. Front axle must be in stock location.

Harmonic Balancer:

1. All engines must be equipped with a harmonic balancer or dampener meeting SFI Spec18.1.
2. All vehicals are required to shield all rotating mass mounted on the front of the crankshaft, if unobstructed. Shields to be from frame rail to frame rail and top to bottom. Shields to be a minimum of .125” steel or aluminum fastened by at least 2 evenly spaced 3/8” grade 5 bolts.

U–joint shielding:

1. All u–joints and yokes must have a 360 degree cover, at least 6” long (covering entire yoke and u–joint), 1/4” thick steel (3/8” thick aluminum). Inside diameter of shield will be no more than 2" larger than u–joint. If cover is cut in half it must be fastened no farther than 1” from ends with at least 3/8”– grade 8 bolts. Must be bolted a maximum of 6” from bolt to bolt. All intermidiate shafts need covered 360 degrees. NO HINGE STYLE fasteners permited. Must be securly fastened. Drive shaft loops:
2. Drive shaft loops required (3/4” or wide), 1/8” or thicker steel (1/4” or thicker aluminum). No more than 2” larger than the largest u–joint. If cut in half, must be bolted within 1” from ends and a maximum of 16” apart from loop to loop (multiple loops). If using a one piece cover it must be bolted a maximum of 6” apart the entire length and at least 1” from ends. All fasteners must be at least 3/8”– grade 8 bolts. NO HINGE STYLE permited. Must be securly fastened.

ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED DUE TO YOUR SAFETY AND THE SAFETY OF OTHERS. THE OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce all of the rules! Every vehicle will be teched on a random basis at some point throughout the season.**

 

9,500lb. Hot Farm Tractors

Rules locked 2021

With the exception of safety requirements approved by the board.

Must also follow all general rules listed above.

Engines:

1. Maximum 540 cubic inch limit, 1% tolerance.

2. Water injection is allowed. No oxygen carriers or combustion accelerators allowed. Water

only.

3. Factory after cooler allowed. AGRICULTURE/OEM USE ONLY.

4. Turbo limited to 3" inlet, 3 1/2" outlet.

a. Compressor wheel must protrude into the 3” bore at least 1/8 inch.

b. All turbine wheel blades must protrude into the 3.5 bore at least 1/8 inch

c. Intake and exhaust will be measured at the intersection of the wheel face and tip

diameter.

d. No variable geometry turbo.

5. No additional openings in compressor housing outside the 3” opening. MWE groove is

allowed to be open no more than .200.

6. Factory cast iron cylinder head and block, no aluminum or deck plates.

7. Diesel fuel only, no additives or pressurized fuels, NTPA fuel guidelines 409.

8. Stock appearing manifolds, intakes and exhaust.

9. Maximum of two valves per cylinder.

10. Engines must be from same manufacturer and must bolt in stock location without

modification.

a. Any and all engine upgrades must not cross manufacturer’s lines and must be

approved by class members and Board of Directors.

i. Class members and Board of Directors have approved the use of a 12

valve 5.9L Cummins in an Oliver 16xx–18xx series chassis.

11. Mechanical fuels systems only. No computerized or electronically controlled fuel systems.

No ice on board.

Hitches:

1. Hitch height is maximum of 20 inches.

2. Must be within 18 inches to 30 inches behind the center of the rear axle.

3. Must be ridged with no movement in all directions.

4. No more than 11/2 inch difference between hitch mounting point and hitching point.

5. Hook hole is required to be a minimum of 3 ¼ wide 3 ¾ deep opening ID (allow ample room

for person hooking the chain).

Tires & Wheels:

1. Maximum tire size 24.5x32 or 20.8x38.

2. Cut tires are allowed.

3. Front tires must track rear tires.

Safety:

1. Emergency air shut–off is mandatory (must be easily accessible to person hooking the chain).

2. If equipped with an electric fuel pump, tractor must have a electric kill switch wired to the

emergency air–shut–off.

3. Must have a mandatory manual three–way dump valve ahead of the injection pump, to be

operated by the driver.

4. Must have working fire extinguisher that is within reach of the driver.

5. Must have working, individual rear brakes. Must have needle bearing cross in differential.

6. Must have wheelie–bars.

7. Must have clutch blanket or steel shield installed 270 degrees 3/8 inch thick, and 12 inches

wide.

8. Seat belts required.

9. Roll over protection mandatory. 3 bar roll cage manufactured from 2” ODx.120 wall.

10. Must have a steel flywheel and clutch assembly.

11. Side shields–Engine side shields are mandatory. Shields must be solid and minimum of .060”

thick steel, or .120” thick aluminum.

a. All in line engines are required to have an additional inner side shield consisting of

.125” thick steel, or .250” thick aluminum inside the current side shields. This shield is

independent of the current shield and must extend from the bottom of the head to the

centerline of the crankshaft and extend the full length of the block on each side of the

engine.

12. All inline turbocharged engines are required to have one 3/8” or larger cable that surrounds

the engine block and head. This cable must be placed between the first and second cylinder.

Cable must have 2 clamps at the splice and have no more than 4” of slack.

13. Tie–bars securing front frame rails to rear axle housing are mandatory.

14. All drivers are required to wear full face helmets and jackets and pants with SFI rating of 3–

2a–1 and shoes with a SFI 3.3/5 rating.

15. Must have 2–3/8” bolts in a cross pattern installed in exhaust pipe.

16. Front skies are mandatory. All tractors must have skid plates mounted in line with each frame

rail and extended from the center of axle forward (on both sides) equal in strength to frame rail

material. Skid must be securely mounted and braced to the cassis. Recommended skid surface to

be a minimum of 4 inches wide and 12 inches long with a minimum of 6 inches curve when

measured from the front of most part of rolled edge. Maximum ground clearance is bottom of

wheel rim not to exceed 4 inches with front tires in normal position.

Harmonic Balancer:

1. All engines must be equipped with a harmonic balancer or dampener meeting SFI

Spec18.1.

2. All vehicals are required to shield all rotating mass mounted on the front of the

crankshaft, if unobstructed. Shields to be from frame rail to frame rail and top to bottom.

Shields to be a minimum of .125” steel or aluminum fastened by at least 2 evenly spaced

3/8” grade 5 bolts.

Appearance:

1. Tractor must be in stock appearance, hoods, grills, & fenders, (except injection pump & after

cooler).

2. All tractors that utilize tube ladder–type frames must be covered on outside with steel or

aluminum 0.060 thick.

3. Maximum wheel base is 114”.

4. Maximum length is 13’ from center of rear axle to forward–most part of tractor, including

weights, not including front hitch.

5. Stock bell housing, stock transmission housing, and stock final drive housing or manufacture’s

replacement. No component chassis.

ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED DUE

TO YOUR SAFETY AND THE SAFETY OF OTHERS. THE

OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce all of the

rules! Every vehicle will be teched on a random basis at some point

throughout the season.

5,500LB. Michindoh Mods

Michindoh Mods 2021 Rules and Procedures

1.    Weight

a.                5500 ibs.

2.    Driver

a.                Must be 16 years of age or older

3.    Tires

a.                Whether U.S. or metric numbering system – can be no larger than 18.4 x 38.

b.               Any cut.

c.                Aluminum and steel rims allowed.

d.               Bias or radial / Ag tire only.

e.                No duals.

4.    Fuel.

a.                Commercial pump gas.

b.               Race gas.

c.                Aviation fuel.

d.               No alcohol.

e.                No nitros oxide.

f.                 No pressurized fuel tank.

5.    Engine.

a.                American made automotive type engine no larger than eight

cylinders.

b.               Maximum 500 cubic inches with a 1% tolerance.

c.                Must be cast iron block, heads, with visible OEM casting number –

all must be same manufacturer. No after-market, SOV, or bowtie blocks allowed. No hemispherical style heads allowed.

d.               2 valves per cylinder.

e.                1 sparkplug per cylinder.

f.                 No overhead cams.

g.               Must be naturally aspirated on carburetion.

h.               Headers must exhaust in an upward direction.

i.                  All tractors must carbureted with no fabricated sheet metal intakes.

j.                  Distributors – any factory or aftermarket distributor can be run as

long as it is MSD 6AL compatible. k. Ignition – M.S.D. #6AL – 6420 or #6ALN – 6430 – rev limiter box with 7200 chip – Tech officials will check RPM’s of the MSD box with an MSD test box and chips will be tested with the same box for success and RPM’s and shall not be any higher than 7210. If chip is over 7210 it will be automatic disqualification resulting in last place position of that event. MSD box must be mounted in a location that is easily accessible and visible to the Tech official. Chip port must be facing an open position to get test tool on easily. Chips will be removed and checked by a Michindoh Director after your pull. Then can be picked up after the class is over.

6.    Tractor.

a.                2 wheel drive farm type tractors only – with original transmission

housing attached to the rear end – must have at least one forward gear – no planetaries.

b.               Maximum length 14’’ from the center of rear axle to the furthest

point forward including weights.

c.                Must have a wide front end – Front tires must track inside rear

wheel tread.

d.               Must have working brakes.

7.    Hitch.

a.                20” maximum height.

b.               Hitch point 18’’ minimum behind centerline of rear axle – the

distance behind the hitch hole may not exceed more than 1 ½’’.

c.                Must be rigid in all directions.

d.               Minimum opening 3 ½’’.

e.                Minimum of 1’’ thick maximum 1 ¼”.

f.                 Turn buckles or hitch adjustor cannot be higher than the center of

the rear axle.

g.               No obstruction 5’’ wide and 24’’ directly about hitch hole.

h.               Welds and hitch construction will be inspected by Tech official for

safety.

8.    Wheelie Bars.

a.                Must support weight of tractor in its heaviest class.

b.               Must extend a minimum of 32’’ behind the center of the rear axle.

c.                Pads must be a minimum of 5’’ inches square with trimmed corners

optional and not more than 10’’ off the ground.

d.               Wheelie bars are to be mounted separate from hitch.

9.    Miscellaneous.

a.                There will be a required driver safety enclosure, any NTPA style roll

cage, or a minimum of 2’’ tubing or box tubing with at least 2 bars, with at least 2’’ of clearance between inner fenders and tires – refer to attached diagram for minimum building specifications – Tubing must be a minimum of ninety thousandths of a inch wall thickness. Roll cages will be inspected and stamped by tech officials with year of inspection. Sonic test equipment for steel wall thickness may be used if needed.

b.               Deadman throttle reguired – spring at the carburetor return to idle. 

c.                Ignition kill switch required – must stop fuel pump and ignition –

must be mounted about the hitch plate – must run electric fuel pump – easily accessible and visible to hitchman on sled.

d.               May only use an electric fan, no engine driven fans allowed.

e.                Fire extinguisher – mounted within driver’s reach – must be readily

accessible and minimum of two pounds.

f.                 All belts must be 360 degree shrouded with 1/16’’ steel or 1/8’’ or

thicker aluminum. a. Harmonic balancer (SFI preferred) must be surrounded 360 degrees by a min. 3/16” thick steel – also a metal strap over the center of the balancer must be a min. of 3/16’’ thick and 3’’ wide, no larger than a 2” hole and a 3 in strap. Anything over 2” inch whole up to 3 ½ damper must be completely covered with 3/16” for access to the crank center bolt. Max inch by inch hole is allowed at the timing indicator marks to allow for engine tuning. Entire enclosure must be mounted in at least 3 solid points.

g.               Universal joints, chain couplers and/or drive shaft must be

surrounded 360 degree by ¼’’ or thicker steel (entire shaft length) from the automatic transmission to the tractor transmission. Round drive shaft cylinder required. If shaft cover is cut in half it should be bolted by 3/8 or larger of grade 5 or better bolts in reasonable spacing for safety. Tech will check over proper spacing for safety.

h.               Automatic transmission must be surrounded by a SFI 4.1 or 4.2

rated transmission blanket at least 18’’ in length. Blanket must be mounted to the block with no more than a 4’’ gap between the block and the blanket and have at least 3 straps encompassing the transmission. ¼ steel may be used instead with same dimensions applying. Must be equipped with an SFI flex plate.

i.                  Everyone must run an automotive type automatic transmission with

a torque converter – mounted directly to the back of the engine.

j.      Side shields – must be made from 1/8’’ or thicker steel or ¼’’ or

thicker aluminum – must cover from front to rear of block and cover from the bottom of the head to 2’’ below crankshaft center line – must be secured at all four corners.

k.    Tractors can be driven or are allowed to be towed around in the pit

area.

10. Driver Safety Equipment.

a.    Single layer fireproof driving suit.

b.   Full face helmet – D.O.T. approved.

c.    High back molded vinyl, fiberglass, or aluminum race seat.

d.   4 or 5 way harness.

e.    Automatic shifter must activate reverse clear lens back up light –

with unobstructed view to hitchman on the sled.

f.     All non – barbed fittings (cooling or fuel) must be double clamped.

g.   Driver’s equipment must on tractor while being scaled. If equipment

is not on vehicle tractor will not be allowed to be scaled.

1.    Kill switch must stop ignition and fuel pump.

2.    Tractor must have a neutral start safety switch.

3.    Backup light and kill switch must be easily accessible and seen by hitch man on sled and may be checked randomly at pulls. At pulls colored tie straps will be applied to kill switch to signify that tractor has been through tech.

For Technical questions regarding Mods please call Tyler Clifton cell #419296-1552 

ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED DUE

TO YOUR SAFETY AND THE SAFETY OF OTHERS. THE OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce all of the rules! Every vehicle will be teched on a random basis at some point throughout the season.**

2 Wheel Pro Street 5200#


 Rules locked 2021

 

ENGINE:

DRIVETRAIN:

HITCH SETUP:

CHASSIS:

 

ALL THE ABOVE RULES WILL BE STRONGLY

ENFORCED DUE TO YOUR SAFETY AND THE SAFETY

OF OTHERS. THE OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce

all of the rules! Every vehicle will be teched on a random basis

at some point throughout the season.**


 



 



 

 

2021 Michindoh 2.6SB/2.5 Workstock rules.


Rules locked 2021


 

2021 8000lb 2.6 smooth bore and 8000lb 2.5 workstock will be ran as one class till numbers in each grow.


 

8000lb 2.6 Smooth Bore/ Pro Street Diesel Truck

PPL Rules Trucks always welcome!


 

1.Maximum weight 8000

2. OEM Chassis is mandatory. The vehicle must retain the full OEM chassis. Wheel tubs, back half conversions and tube chassis are prohibited. Lengthening of frame allowed up to 158”. Longer trucks (158”-172”) must maintain OEM measurements for body being used.

3. The body must be OEM truck body including the full bed floor. No flatbeds permitted. The body must retain the full sheet metal. After market hoods permitted. The hood must be closed and securely latched when hooked to sled.

4. Maximum cubic inch 460. Engine must be in OEM locations for the body used. No aftermarket blocks permitted. Engine must have 3/8 cable surrounding #1 and #2 cylinders and must pass through the manifolds. 2 cables at splice with 4-6 inches of slack.

5. Cylinder head must be OEM or OEM replica for brand of engine. Outside of cylinder head must measure factory width and length. No billet heads of any material. Head must retain factory OEM valve angle. No deck plates permitted. Side draft and aftermarket intake manifolds are allowed.

6. Hook point to be no closer than 44”of centerline of rear axle. Maximum hitch height of 24” with a minimum of 3.75”x3” opening. Hitch must be stationary in all directions. Hitch must be frame mounted. The use of Reese style hitches is prohibited. Hitch must be centerline of rear axle or behind. Hitch must not exceed 25 degree angle from pivot point to hook point. No hitch supports or adjusters fastened to rear axle housing shall be above center point of rear axle. Pivot pin of drawbar can be no further forward than the centerline of rear axle.

6a. Michindoh will allow a well-built reese style hitch, no factory style reese allowed, must be made for pulling!

6b. Michindoh will not require a secondary safety hitch.

7. Turbo is limited to a 2.6” inducer bore. Bore must be smooth. No MAP Width Enhancement groove (MWE) allowed. Compressor wheel must protrude into 2.6” bore for 1/8”. Bore will be checked with a 2.605”turbo plug. Plug must not be able to enter inducer bore and contact wheel.

8. All vehicles must be equipped with upward pointing exhaust located either directly behind cab or out of truck hood. Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other and within 12 inches of turbo.

9. Front hanging weights are allowed, not to exceed 60 inches forward from the centerline of front axle. Ballast may be added in the bed of truck but must be securely fastened. Maximum weight 8000 pounds.

10. All trucks must have at least six-inch-wide u-joint shield around all u-joints constructed of at least 5/16-inch steel or 3/8 aluminum that will safely contain the u-joint and the end of the driveshaft. All shields must be securely mounted to vehicle.

10a. Michindoh will not require the drive line tether system.

11. A fire extinguisher system is permitted. 2.5# fire extinguisher must be securely mounted within reach of driver. A complete OEM firewall is required.

12. All drivers must have valid driver license and full SFI fire suit including helmet, gloves, neck brace. Seatbelt/restraint must be worn.

13.The complete OEM floor pan is mandatory. Vehicle must maintain a complete firewall. Additional gauges and pillar pods are permitted.

14. Hand throttles permitted. Diesel fuel only No propane or N02 or any other oxygen enhancers allowed

15. Maximum of one P pump up to P7100 allowed. 13MM plunger limit. Ag governors permitted. The use of multiple high pressure common rail fuel pumps is legal.

16. OEM rear and front ends required. Must have come factory in a one ton or smaller vehicle.

17. Axle shields are required. Shield to be .060” thickness steel or aluminum. A hole may be cut in one shield to allow operation of hub lock.

18. Safety switch (rain cap or guillotine) must shut off air to diesel engines. Switch will be securely mounted to back of vehicle. A 2 inch or bigger solid ring must be attached to end of switch. Ring must be zip tied to switch bracket. Switch must also be able to be activated in cab while driver is secured in vehicle.

18a. 3-way fuel dump valve highly recommend, with a in cab control.

19. Hydraulic steering permitted

20. Suspension - The upper mounting point for strut assembly must be in factory location. Adjustable caster/ camber pillow ball mounts are permitted. The lower control arm may be strengthened provided the factory mounting points are maintained. Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars and devices are permitted. Raising or lowering of vehicle height with suspension modifications is permitted but must be bolt on only. Welds permitted for attachment to frame and axle only. Blocked suspension permitted. No air bags. Rear suspension may be made solid.

21. Tires must be DOT approved with maximum size of 35x12.50. No studded tires or tire chains. No alterations to tires permitted. No bar or terra tires.

22. Dual wheels are prohibited.

23. OEM transmission and transfer case must be used. Must have come factory in a one ton or smaller vehicle.

24. Non-OEM transmissions prohibited. Aftermarket torque convertors, valve bodies, and internal components are permitted.

25. SFI bell housing and/or SFI blow proof bell housing or SFI blanket type shield must be used.

26. Water injection is prohibited. 2. Air to air intercooler only. No ice or water permitted truck during competition.


 

8000lb 2.5 Work Stock


 

  1. Trucks are limited to street legal stock appearing Diesel trucks with 4x4 weighing a maximum of 8000 lbs.

  2. Hanging weight is permitted and must be on a bracket and not extend more than 60 inches from the centerline of the front axle. No weight boxes or covers.

  3. OEM truck body with full street trim and complete interior. Working 4-wheel brakes. Must use DOT street tires. Single tires only, no duals wheels permitted. No hand throttles. 35x 12.50 max tire size.

  4. Engine, T-case and axles must be from a 1 ton or less. Air-to-Air intercoolers, Radiator and Battery's must be in factory location. No filled blocks or cylinder heads. Engine and cylinder head must circulate coolant. No air to water intercoolers except newer Fords 6.7s that came factory equipped.

  5. Must use factory block and head castings. No aftermarket blocks or heads. No runner intakes. No deck plates.

  6. Fuel injection pumps are limited to 1 plunger per cylinder. Dual CP3 are allowed. No AG GOVERNORS.

  7. Turbo is limited to 1 stock appearing factory make specific turbo that measures 2.5 bore before and after map grove. No S300 or S400 turbos or turbo parts are allowed. No forward-facing map groves. Map grove must be perpendicular to bore and in factory stock location. Air must turn 90 degrees in map grove. Map grove must not exceed .200 max at face of wheel. Map grove must be in factory location. Ford 6.4 may use factory setup with no modifications. Turbos will be checked with a 2.550 plug and map grove will also be checked. All pullers will make the turbo accessible to tech official. Duramax and Ford Trucks are allowed a T3 pedestal to be able to run a Cummins O.E style he351 set ups.

  8. Exhaust must exit behind cab, turn ups required on tail pipes. Cross bolts are mandatory in down pipe. Driveshaft loops are required at front and rear axle. And any visible U joint

  9. Rear suspension may be blocked solid with removable blocks. All factory suspension mounting points must stay intact and be used. Ladder bars are permitted and must have 2 points of contact. No center pinion links, and no bars or links mounted above centerline of axle. Must have straps around ladder bars. No bars are permitted to be used from hitch to axle. No rear frame trusses.

  10. Receiver style hitch must be used. Hitch must be horizontal to the ground and stationary in all directions. No hanging or swinging Clevis. Reinforcements are permitted and must not be forward of the centerline of the axle. No part of the hitch can be higher than top of frame. Hitch height is 24 inches. Hook point must be a minimum of 44 inches from center of axle to hook point.

  11. No water injection and no nitrous, no pressurized bottles are allowed on truck. No spraying of water on intercooler. No use of ice, period.

  12. Safety


     

    1. Drive Shaft Loops recommended

    2. U-Joint Shields mandatory on rear axle u joint, and front axle u joint, and any visible

    3. Transmission blanket recommended, if turn over 4500 mandatory

    4. Kill switches - the disconnect must be at the rear of truck close to the hook point. Trucks can have either an electronic shut off and or a spring-loaded guillotine or both. It is recommended that all trucks have an air shut off.

  13. All drivers must wear a helmet and fire jacket.

  14. Must have a working fire extinguisher in cab within reach of driver

  15. Tech official decision is final.



 

ALL THE ABOVE RULES WILL BE STRONGLY

ENFORCED DUE TO YOUR SAFETY AND THE SAFETY

OF OTHERS. THE OFFICIALS’ DECISIONS ARE FINAL!

**The Head of Class/Tech Official for each class will enforce

all of the rules! Every vehicle will be teched on a random basis

at some point throughout the season.**


 

 

8,500# OPEN

$50 entry100% payback

Must also follow all general rules listed above.

Open class is subject to change at anytime by board Must meet all safety rules to class you would normally run.

540ci maximum

HITCH

2WD Gas 30”

4WD Gas 26”

Diesel Trucks 24”

Farm Tractors 20”

Driveshaft Loops:

2. Drive shaft loops required (3/4” or wide), 1/8” or thicker steel (1/4” or thicker aluminum). No more than 2” larger than the largest u–joint. If cut in half, must be bolted within 1” from ends and a maximum of 16” apart from loop to loop (multiple loops). If using a one piece cover it must be bolted a maximum of 6” apart the entire length and at least 1” from ends. All fasteners must be at least 3/8”– grade 8 bolts. NO HINGE STYLE permited. Must be securly fastened. U–joint shielding:

2. All u–joints and yokes must have a 360 degree cover, at least 6” long (covering entire yoke and u–joint), 1/4” thick steel (3/8” thick aluminum). Inside diameter of shield will be no more than 2" larger than u–joint. If cover is cut in half it must be fastened no farther than 1” from ends with at least 3/8”– grade 8 bolts. Must be bolted a maximum of 6” from bolt to bolt. All intermidiate shafts need covered 360 degrees. NO HINGE STYLE fasteners permited. Must be securly fastened. Harmonic Balancer:

1.                All engines must be equipped with a harmonic balancer or dampener meeting SFI Spec18.1.

2.                All vehicals are required to shield all rotating mass mounted on the front of the crankshaft, if unobstructed. Shields to be from frame rail to frame rail and top to bottom. Shields to be a minimum of .125” steel or aluminum fastened by at least 2 evenly spaced 3/8” grade 5 bolts.

ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED DUE

TO YOUR SAFETY AND THE SAFETY OF OTHERS. THE OFFICIALS’ DECISIONS ARE FINAL