2022 Michindoh Truck and Tractor Pull Association Rules
Rules as of 12/12/2021
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)
8,500lb. Tractors Open (100% Payback possible $500+ purse with minimum 5 vehicles)
5,700lb. Michindoh Modified Rails (points class)
8,000lb. 2.6 SB (points class)
8,000lb. Workstock (100% Payback possible $500+ purse with minimum 5 vehicles)
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 beawarded 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 theseason. 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, 2022
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 36 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 2022
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 2022
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 no bigger than
a 33x12.50 inches, or 305–70–16 metric maximum tires size. No cut tires. 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
and a 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. (Must
be no bigger than a 1.750 throttle bore size max will be checked before our
first pull and carb will be sealed.)
3. No fuel injection.
4. Cast iron block and heads must be used. No aluminum blocks factory aluminum
heads 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 vehicles 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
intermediate shafts need covered 360 degrees. NO HINGE STYLE fasteners
permitted. Must be securely 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 permitted. Must be securely 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.**
8,500lb. Open Tractors
Rules locked 2022
With the exception of safety requirements approved by the board.
Must also follow all general rules listed above.
Not limited to the following rules but must follow safety rules
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.
5,700LB. Michindoh Mods
Michindoh Mods 2022 Rules and Procedures
1. Weight
a. 5,700 lbs.
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 nitrous oxide.
f. No pressurized fuel tank.
5. Engine.
a. American made automotive type engine no larger than eight
cylinders.
b. 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.
A. Must have cast aluminum manifold.
B. Must except stock rocker arm assembly.
c. Maximum 500 cubic inches with a 1% tolerance.
d. Open to any block (Stock bore spacing)
e. 2 valves per cylinder.
f. 1 sparkplug per cylinder.
g. No overhead cams.
h. Must be naturally aspirated on carburetion.
i. Headers must exhaust in an upward direction.
j. All tractors must carbureted with no fabricated sheet metal intakes.
k. Distributors – any factory or aftermarket distributor can be run as
long as it is MSD 6AL or 7AL compatible msd box as long as it has a chip. k. Ignition – M.S.D. #6AL – 6420 or #6ALN – 6430 – rev limiter box with 7500 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 7510. If chip is over 7510 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 #419-296-1552
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 2022
ENGINE:
Gas only, NO alcohol, E85, or fuel additives.
Naturally aspirated engines only.
MAX cfm carb, 4150/4160 Holley flange only. (No Dominators, King Demons, SV1, or split carbs.)
MAX 478 cubic inches +2%
Small blocks are NOT required to be pumped.
All pumping must be done at the track.
Blocks and heads MUST be cast iron.
Aftermarket blocks and heads are allowed
No aluminum blocks and heads are allowed.
SFI approved harmonic balancer.
MUST use SFI approved flywheel.
Motor must be mounted within 6? of original V8 mounts.
Must have a catch can for the radiator.
DRIVETRAIN:
Dual disc clutches are allowed.
No reversers or drop boxes allowed.
OEM style transmission ONLY.
One-ton rear axle or less.
No planetaries allowed.
Manual transmission MUST use a SFI approved bellhousing (blow proof).
Must use a block saver plate.
If bellhousing has been altered in any way (cut, torched, or welded) you must also run an SFI approved transmission blanket.
Automatic transmissions MUST be covered by an SFI approved transmission blanket.
HITCH SETUP:
36” minimum hook point from center of rear axle.
48” maximum hook point from centerline of rear axle.
Bolted clevis or hitch point must have 3.5” hole.
Hitch height is 30” maximum.
Must have sled stops that extend at least 8” past the rearmost point of the truck.
CHASSIS:
Rigid suspension is permitted.
Front weights must not extend greater than 60” from centerline of front tires.
DOT tires only. 35×12.5 maximum manufacturers tire size, no cut, siped, or barred tires allowed.
All U-joints and chains must be covered with a 360” loop and be at least 6” wide constructed of 1/8” steel or 3/16” aluminum.
Vehicles up to 140” center to center of axles may run fully weighted.
Vehicles up to 146” must run 200 lbs light.
No vehicles over 146” allowed.
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.**
8000lb 2.6 Smooth Bore
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 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
a. Drive Shaft Loops recommended
b. U-Joint Shields mandatory on rear axle u joint, and front axle u joint, and any visible
c. Transmission blanket recommended, if turn over 4500 mandatory
d. 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