2018 Michindoh Truck and Tractor Pull Association Rules
Rules as of 1/25/2018
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)
8,500lb. Pro Farm Tractors (points class)
9,500lb. Hot Farm Tractors (points class)
5,500lb. Michindoh Modified Rails (points class)
7,800lb. 2.5 Diesel Trucks (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.
Membership fees are $60.00 for one pulling vehicle and one driver. $30.00 for each additional
vehicle or driver.
Any driver wishing to pull at only one Michindoh event will have the option to pay the one-entry
vehicle and driver membership. This fee will be $30.00. This puller will not receive points our
voting rights. If this puller wishes to enter an additional hook at the same event or at another event,
he/she will have to pay the remaining $30.00 of the vehicle and driver membership fee. The puller will
then have the full membership benefits.
If a pull is cancelled, 30 “show up” points will be issued to those vehicles alreadyentered. 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.
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.
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. 4wd Altered Stock
Rules locked, 2016, 2017
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 2016, 2017, 2018
With the exception of Safety requirements approved by the Board.
Must also follow all general rules listed above.
Engines:
1. Maximum single 485 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 2016, 2017, 2018
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. All drive lines 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 brakes on all 4 wheels.
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. Engines must be in factory location.
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 or heads. 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. All exhausts must run through the muffler and be at least to the rear of
cab.
7. No magnetos.
8. Electric water pumps are allowed.
9. Race fuel is allowed, No alcohol, LP, or Nitrous oxide.
10. All engines are required to have a S.F.I. approved balancer and flywheel.
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 2016, 2017, 2018
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 20.8/38.
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.**
8,500lb. Pro Farm Tractors
Rules locked 2016. 2017, 2018
With the exception of safety requirements approved by the board.
Must also follow all general rules listed above.
Engines:
1. Maximum 510 cubic inch limit, 1% tolerance.
2. Water injection is allowed. No oxygen carriers or combustion accelerators allowed. Water
only.
3. Turbo are limited to 3" inlet x 3.5” 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.
4. No additional openings in compressor housing outside the 3" opening. MWE groove is
allowed to be open no more than .200.
5. Factory cast iron cylinder head and block no aluminum and no deck plates.
6. Diesel fuel only, no additives or pressurized fuels, NTPA fuel guidelines 409.
7. Stock appearing manifolds, intake and exhaust.
8. The largest fuel injector pump allowed will be a Bosch P series pump with only one plunger
per cylinder.
9. Maximum of two valves per cylinder.
10. Engines must be from same manufacturer and must bolt in stock location without
modification.
b. 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 1 1/2 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.
Tires & Wheels:
1. Maximum tire size 18.4/38.
2. 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 an electric kill switch wired to the
emergency air–shut–off.
3. Must have a 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 belt required.
9. Roll over protection mandatory. 3 bar roll cage manufactured from 2" OD x .120 wall.
10. Must have a steel flywheel and clutch assembly.
11. Side shields – 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. Shoes SFI 3.3/5 required.
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.
2. All tractors that utilize tube ladder–type frames must be covered on outside with steel or
aluminum 0.060 thick.
3. Stock bell housing, stock transmission housing, and stock final drive housing or
manufacturer’s replacement. No component chassis.
4. Maximum wheel base is 114”.
5. Maximum length is 13’ from center of rear axle to forward–most part of tractor, including
weights, not including front hitch.
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.**
7,800# 2.5 DIESEL TRUCK
2018 7800lb 2.5 Diesel Truck – 4x4
This
Diesel class is designed for pickup trucks with a wide variety of performance
upgrades. The truck must be 4 wheel drive.
Weight: 7800 lb Maximum, with driver
Ballast:
Hanging front
weights and weight boxes (with weights only) are permitted. If used, ballast
must be securely fastened. Weight or weight bracket must not extend more than 60
inches from the center line of the axle. Final decisions rest with the technical
department. Weights and brackets must be removable by hand.
Batteries: The Batteries must be securely mounted. They may not be
located in the driver compartment or forward of the radiator core support.
Body:
The body must be the
OEM truck body including the full bed floor. The body must retain full sheet
metal. The complete OEM firewall and complete OEM floor pan is mandatory. A
factory installed pickup bed or commercial style aftermarket bed must be
installed. No flat beds are permitted.
Brakes:
Four wheel
hydraulic functional brakes are recommended front hydraulic brakes are required.
Chassis:
The OEM chassis is
mandatory. The engine must be in the OEM location. The vehicle must retain the
full OEM chassis. Wheel tubs, back half conversions, tube chassis, etc, are
prohibited. Cooling System:
Radiators must be in stock location and be of at least stock size
Credentials:
All drivers
must have a valid state drivers license.
Driveline:
An OEM
transmission and transfer case are mandatory. They must have been an option on a
one ton or smaller pickup.
Driver Restraint System:
The OEM restraint system or SFI 5 point harness
is mandatory and must be worn with a DOT
approved seat.
Driveshaft Loops:
All
trucks must have at least five (6) inch wide u-joint shields around all u-joints
on rear drive shaft constructed of at least ¼ steel or 3/8 aluminum that will
safely contain the u joints and the ends of drive shafts. Any u-joint on the
front axle that can be seen from front or side of truck must be shielded the
same as all other u-joints. All shields must be securely mounted to the vehicle.
Engine:
The engine is
limited to a stock appearing, OEM compression engine, available from the factory
in a one ton or smaller truck. Cubic Inch limit of 444CI. Block must circulate
coolant freely. No hard filled blocks. Water pumps may be factory or electric
powered. All factory belt driven accessories, excluding the air conditioning
compressor, must be retained and powered via the crankshaft by a standard
serpentine “V” belt. Electric cooling fans are permitted. No individual runner
intake manifolds. (Example: ZZ-customs). Belt driven alternator. No deck plates.
EXAMPLE: NO HAMILTON HEADS FOR THE CUMMINS AND NO BRODIX HEADS FOR THE DURAMAX.
Exhaust:
All vehicles must
be equipped to direct exhaust upward. The exhaust must exit rearward of the
driver’s compartment. Stacks exiting through the fender well and hood are
prohibited. Two (2) 3/8 inch diameter bolts must be installed through exhaust
pipe in a cross pattern within one (1) inch of each other and as close to the
turbo as possible. This will be teched. Bolt heads welded to the pipe or sheet
metal screws to mimic this will be disqualified.
Fire Extinguisher System:
A
fire extinguisher system is permitted, it must be securely mounted All must have
at least a 2 ½ lb extinguisher with working gauge mounted within drivers reach.
Fuel:
The fuel must be pump
#1, #2 diesel or Soy/Biodiesel. Fuel must be commercially available. A fuel cell
may be used in place of the factory fuel tank, but must be mounted in factory
location or securely mounted in bed.
Fuel Injection Pump:
The
fuel injection pump is limited to cylinder number specific (I.e. 6 cylinder pump
on a 6 cylinder motor). The use of multiple high pressure common rail fuel pumps
or HPOPs are permitted. P pumps that are allowed are the p3000 and the p7100. Ag
governors are allowed. No Sigma or 12 cylinder pumps allowed.
Harmonic Balancer: All engines must be
equipped with a harmonic balancer or dampener meeting SFI Spec 18.1.
2018 7800lb 2.5 Diesel Truck – 4x4 (Page 2)
Intercoolers: Factory style or aftermarket air to air replacement only in
stock location. **Water to air coolers are prohibited. ** Any means of
cooling the air before the engine, except the air to air cooler is prohibited.
**NO USE OF ICE OR WATER**
Hitch: Reinforcements are permitted. The Hitch or Reinforcements must not
extend forward of the center line of the rear axle. The hitch must be horizontal
to the ground and stationary in all directions. Bumper may be notched or
removed. The hitch’s height from the ground may not exceed 24 inches. The
hooking point must have a minimum of 3 inch by 3 ¾ inch inside opening for the
sled hook. The hooking point must be a minimum of 44 inches from the center of
the rear axle, to the end of the hole where the hook touches metal to be pulled
from, this is the hooking point.
Kill Switches: All trucks are required to have kill switch located on the
back of the truck, located near the hooking point. On trucks with an electric
injection fuel pumps it must have an electric shut off or disconnect for the
injection pump on the back of the truck for trucks with manual injection pumps
they must have an air guillotine of the spring loaded type, no butterfly type to
kill the air intake to the engine. It is REQUIRED
to have an air shut off on all trucks. Kill switch failure will result in
disqualification.
Nitrous Oxide/Propane: Nitrous Oxide, propane, or other oxygen extenders
are prohibited. All system components must be removed from the truck. No
pressurized bottles.
Rear End: Non-OEM rear-end housings are prohibited. The rear end housings
must have been for a one ton or smaller pickup pick up. Rear axle bolts must be
covered with a cap or shield.
Safety Equipment: class pullers must properly wear DOT approved helmet
and fire jacket/pants. Fire shoes & fire gloves recommended or at least leather
work boots.
Steering: The vehicle must retain the full, original OEM, factory
steering gear. The vehicle must retain the original OEM power assistance, if it
was so equipped. Additional stabilizers are permitted. Street Equipment:
Complete headlight and taillights assemblies are mandatory and must be
operative, except the right front headlight may be removed for air inlet to
engine. Complete OEM windshield and all other windows are mandatory. Driver
window must be able to operate per factory specifications (open & close).
Suspension - Front: The factory suspension configuration must be
retained. Modifications to the front suspension that would alter the original
location (I.e. moving it forward or backward) is not permitted. Strut tower
braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars
and devices are permitted. Air shocks are prohibited.
Suspension - Rear: . Traction bars if installed must have a chain or
cable or some type of safety device mounted one (1) foot from the front support
to catch the bar in case of failure. The rear suspension can be solid. Air bag
spring assist and air shocks are prohibited.
Tires: The tires must be DOT street tires. Cut tires are prohibited. The
vehicle must retain the original factory wheelbase and track width. 35 inch max
x 12.50. No chains or studs. Single tires. No Duals.
Transfer Case: Non OEM transfer cases are prohibited. It must have been
an option on a one ton or smaller pick up truck.
2018 7800lb 2.5 Diesel Truck – 4x4 (Page 3)
Transmission - Automatic: Non - OEM transmissions are prohibited. The
transmission must have been an option for a one ton or smaller truck.
Aftermarket torque converters, valve bodies and internal components are
permitted. Transmission brakes are prohibited. Any non -OEM floor mounted
automatic shifter must be equipped with a spring-loaded positive reverse lockout
device to prevent the shifter from accidentally being put into reverse. A
functional neutral safety switch is mandatory. Vehicle must not start in gear.
All transmission lines must be metallic or high pressure type hose. All
automatic transmissions must be equipped with a transmission shield meeting SFI
Spec 4.1 and must be labeled accordingly. A blanket type shield must be used and
appropriately labeled as meeting SFI Spec 4.1 and it must extend from the rear
of the engine block to the rear of the tail housing with a minimum of six (6)
inch overlap where it is fastened. All vehicles using an automatic transmission
must be equipped with a flex plate meeting SFI Spec 29.1.
Transmission - Manual: Non - OEM transmissions are prohibited. The
transmission must have been an option on a one ton or smaller truck. Aftermarket
internal components are permitted. A clutch meeting minimum SFI Spec1.1 or 2.1
is mandatory on all engines. All manual transmissions must be clutch assisted.
Sequential shifters are prohibited. All transmissions must have a flywheel
shield labeled as meeting minimum SFI Spec 6.3 or greater. Applications for
which an SFI Spec flywheel shield is not available may use a properly attached
SFI 4.1 or 4.2 blanket that completely covers the bell housing. It must be
attached to the rear of the engine block and extend rearward to the transmission
with a minimum of six (6) inch overlap where it is fastened. All transmissions
or clutch pedals will have a safety interlock switch so that vehicle will not
start in gear.
Turbocharger: 2.6 STRAIGHT BORE AND 2.5 WITH .2 MAP
GROVE TO BOTH BE ALLOWED IN 2018 2.5 CLASS
2.5 TURBO RULE S-4, GT 42, HX 50 and turbo of this type is the largest
turbo allowed. T-4 mounting flange is the largest allowed. No clipped wheels or
step down covers. Billet compressor wheels are allowed. A single .200 inch MWE
groove maximum allowed. Inducer bore must be non-removable. All air must go
through the 2.5 inducer bore and MWE groove. The wheel must protrude into the
2.5 bore 1/8 inch. Turbo checked with a 2.550 plug. 6.4 Powerstrokes will be
permitted to run modified turbos, as long as the atmosphere turbo does not
exceed the OEM straight bore dimension. (2.59”) No TAPERED COVERS will be
permitted.
2.6 TURBO RULE Smooth faced intake housing, limited
to a 2.6” inlet- no map ring – with all air entering through the 2.6” opening.
Intake wheel must protrude 1/8th inch inside of opening. S400 and GT42 and turbo
of this type is the largest allowed. T-4 mounting flange on turbo and exhaust
manifold. Billet compressor wheels are allowed. Wheel must protrude minimum of
1/8” into the inducer bore. Covers will be plugged from the back side to verify
where the wheel protrudes is a maximum of 2.6”. Turbo checked with a 2.605”
plug. No tapered or egg shaped inducer bores allowed.
Water Injection: Water injection is prohibited. All system components
must be removed from truck.
Wheelbase: The vehicle must retain the original factory wheel base and
track width. Cab and chassis trucks may not exceed 172 inch center to center of
axles. Front dual-wheel spacers may be used only with accompanying
positive-offset dually style wheels.
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
Rules locked 2016, 2017, 2018
Must also follow all general rules listed above.
With the exception of safety requirements approved by the board.
Weight:
1. 5,500lbs.
Driver:
1. Must be 16 years of age or older
Tires:
1. Whether U.S. or metric numbering system – can be no larger than 18.4 x 38
2. Any cut
3. Aluminum and steel rims allowed
4. Bias or radial
5. No duals
Fuel:
1. Commercial pump gas
2. Race gas
3. Aviation fuel
4. No alcohol
5. No nitrous oxide
6. No pressurized fuel tank
Engine:
1. American made automotive type engine no larger than eight cylinders.
2. Maximum 500 cubic inches, 1% tolerance.
3. Must be cast iron block, heads, with visible OEM casting number – all must be same
manufacturer. No after–market allowed.
4. 2 valves per cylinder
5. 1 sparkplug per cylinder
6. No overhead cams
7. Must be naturally aspirated on carburetion, dual carburetor tunnel ram allowed.
8. Headers must exhaust in an upward direction
9. All tractors must be carbureted with no fabricated sheet metal intakes.
10. Distributors–any factory or aftermarket distributor can be run as long as it is MSD 6AL
compatible.
11. 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 official after your pull. Then can be
picked up after the class is over.
Tractor:
1. 2 wheel drive farm type tractors only – with original transmission housing attached to
the rear end – must have at least one forward and one reverse operable gear – no
planetaries – no extra transmission or gearing of any kind outside of the tractor’s
transmission on the engine – Tractor gearing can be changed.
2. Maximum length 14’’ from the center of rear axle to the furthest point forward including
weights.
3. Must have a wide front end – Front tires must track inside rear wheel tread
4. Must have working brakes
Hitch:
1. 20” maximum height
2. Hitch point 18’’ minimum behind centerline of rear axle – the distance behind the hitch
hole may not exceed more than 1 ½’’
3. Must be rigid in all directions
4. Minimum opening 3 ¼ wide by 3 ¾ deep.
5. Minimum of 1’’ thick maximum 1 ¼”
6. Turn buckles or hitch adjustor cannot be higher than the center of the rear axle
7. No obstruction 5’’ wide and 24’’ directly about hitch hole
8. Welds and hitch construction will be inspected by Tech official for safety
Wheelie Bars:
1. Must support weight of tractor in its heaviest class
2. Must extend a minimum of 32’’ behind the center of the rear axle
3. Pads must be a minimum of 5’’ inches square with trimmed corners optional and not
more than 10’’ off the ground.
4. Wheelie bars are to be mounted separate from hitch
Miscellaneous:
1. 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. Tubing must be a minimum of .090 thousandths of a
inch wall thickness. Roll cages may be inspected and stamped by tech officials with
year of inspection. Sonic test equipment for steel wall thickness may be used if needed.
2. Dead man throttle required – spring at the carburetor return to idle
3. 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
hitch man on sled.
4. May only use an electric fan, no engine driven fans allowed
5. A working fire extinguisher – mounted within driver’s reach – must be readily
accessible and minimum of two pounds
6. 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, with a max. 1 1/8’’ hole for
access to the crank center bolt. Max one inch by one 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.
7. Universal joints, chain couplers, and/or driveshafts must be surrounded 360 degrees by
1/4” or thicker steel (3/8" or thicker aluminum) entire shaft length from the automatic
transmission to the tractor transmission. Round drive shaft cylinder required (one piece
not cut or welded together is recommended). Inside diameter of shield will be no more
than 2" larger than largest u–joint. If shaft cover is cut hoizontal, vertical, or both, it
must be bolted on both ends of cut (minimum of 1” from edge of cut). Must also be
bolted entire length of cover with a maximum of 12” between bolt spacing. All
fasteners must be at least 3/8”– grade 8 bolts. Slip joint/ yoke shaft manditory. There
will be NO HINGE STYLE fasteners permited. All yokes and u–joints must be entirely
covered 360 degrees. Shield must be securely fastened to frame both ends and center. If
multiple piece shield all ends of shields must be tethered with a nylon strap 2”wide x
3/32” thick and fastened with 3/8” grade 8 bolts or larger. Tether must have metal
inserts for bolt to pass through. Must strap both ends of shield and no more than 2’
apart the entire length of shield. Straps must be bolted to both frame rails and loop
around shield. Braided cable may be used instead of nylon strap.
8. 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 a SFI flex plate.
9. Everyone must run an automatic transmission with a torque converter – mounted
directly to the back of the engine.
10. 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
11. Tractors can be driven or are allowed to be towed around in the pit area.
Driver Safety Equipment:
1. Jackets and pants with a rating of SFI 3–2a1 and shoes with a rating of 3.3/5.
2. Full face helmet – D.O.T. approved
3. High back molded vinyl, fiberglass, or aluminum race seat
4. Four or five point seat harness required.
5. Automatic shifter activated reverse clear lens back up light – with unobstructed view
to hitch man on the sled
6. All non – barbed fittings (cooling or fuel) must be double clamped.
7. Driver’s equipment must be on tractor while being scaled. If equipment is not on
vehicle tractor will not be allowed to be scaled.
8. Kill switch must stop ignition and fuel pump
9. Tractor must have a neutral start safety switch
10. 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.
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!