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General Rules

2012  General Rules for Garden tractor pulling

Rules may vary from promoter to promoter

RULES FOR 2012

JUDGES DECISION WILL BE FINAL ON ANY POINT OF CONTROVERSY.
ANY DISAGREEMENT WILL RESULT IN DISQUALIFICATION.
ALL TRACTORS WILL REQUIRE A FASTENED DOT HELMET & FULLY CHARGED FIRE EXTINGUISHER.
Firesuits must be worn on all tractors using alcohol fuel
Any tractor running over 4000 RPM , driver must wear fire jacket and long pants.,All Firesuits must be fully zipped and collars closed.

Competitors 16 and under must wear dot approved helmet in all classes

All puller must wear long pants.
Consumption of alcoholic beverages or drug use will be grounds for disqualification and removal from the event.
Pulls are open to lawn and garden tractors, rear wheel drive with rubber tires.
All power must be transmitted through rear wheels. No duals or chains.
All tractors must be equipped with working brakes, fenders, hood and grill.
All drive components must have protective shielding.
No portion of the tractor can interfere with the sled hook up. No portion of the tractor including
weights may exceed 8 feet forward of the center of the rear axle (7 feet for stock altered & 6 feet for
stock), 6 feet width or 12 inches outside the tire sidewalls.
All tractors MUST have wheelie bars to prevent turnovers. Pair of these devices is to have min 5” dia wheels 1” wide or skid plates a minimum of 1" x 4" each. Devices must be no less than 5" behind rear wheels and not more than 5" above the ground, allowing the front axle to rise no more than 24" from its normal position, and be strong enough to support the weight of the tractor.

Wheelie bar crossbar supports must not in any way be able to touch the hook chain

Drawbar will be stationary in all directions and min hole of 1 1/2”.

All classes are to be weighed with tractor and driver. All weights must be safely secured and cannot
extend behind the rear wheels (weights may extend 2” with 23” tires), above the steering wheel, or
movable during pull. Any weight or part falling off during pull will result in disqualification, Pull duration will be maintained as long as the tractor is hooked to the sled , unless it a test puller.

Drivers are responsible for weighing there Tractors before the class begins. Weight bars are to be extended for weigh in , and will be rechecked in the extended position with weights at the end of the class as pulled.
Engine speed must be controlled by lever or pedal and no bypass device is allowed. Throttles must
return to idle position when released on all ungoverned engines. No nitrous oxide or pressurized fuel
tanks in any class. No turbos, superchargers, or blowers allowed in any class.
The driver must remain seated during the pull and have at least one hand on the steering wheel at all
times. All tractors must have a safely secured seat. No hands allowed between tractor fender and tire
No shifting of gears is permitted.
Driver may stop within the first 50ft and come back and change gears one time. Performance tractors must make an attempt to stop or signal the flagman of the intent to abort the pull before 50”
A kill switch that will stop engine any electric fuel pumps in case of chain breakage is to be located within 6" of the center at
rear of tractor with a 1" ring to connect to sled. This is mandatory in all classes.
Tractors will be disqualified if any part of the tractor touches the boundary line during the pull.
Front wheels can go over line and back in as long as they don't touch down on or outside of line.

OEM is defined as , A factory part.

If the test puller goes out of bounds, The repull will be immediately or 6th position
Two attempts will be allowed to start the sled except in pull-offs. Only one attempt in a pull-off.
The first puller can drop to 6th position or repull immediately

. If a puller has a mechanical problem they may drop to the end of the class plus 5 min.
All tractors must be operated in a safe manner on and off the track. Registered drivers are to be the
only persons operating a tractor. Anyone "HOT RODDING" will be asked to leave premises.
No mower decks to be left on the tractor. No riders allowed on tractors at any time.
All drivers must sign a waiver. Any driver under 18 must have a parent or legal guardian sign for
them.
**ALL DRIVERS UNDER AGE 14 MUST BE SUPERVISED WHILE OPERATING TRACTOR**
KIDS MUST BE ABLE TO CONTROL TRACTOR TO THE SATISFACTION OF THE SLED OPERATOR.
THIS INCLUDES OPERATION OF THE CLUTCH & BRAKE WITHOUT OUTSIDE HELP.
Only 1 driver may register for each tractor in each class.
Each tractor may pull in no more than 4 rounds.
If less than 3 tractors are registered in any class, the class will be combined with another class.
Tractors meeting safety requirements for which there is no class may be allowed to run exhibition
at intermission.
The top four tractors may be checked at the promotor’s discretion after each class for weight, hitch height, and RPM's (in RPM
limited classes). These checks are drivers' responsibility before class begins.
Top drivers must wait at end of track until bumped down or class is over.
A driver in any class may protest a tractor in the same class for a fee of $100.00 per item. Limit of
3 items. RPM, weight, hitch height, and fuel are free
.
It will be the owner's responsibility to prove
tractor legal to a designated official. If tractor does not meet the specs, the tractor will be disqualified,
forfeiting winnings for that class, and protest fee is returned to protestor. If tractor is legal the
protested driver keeps the protest fee. If driver refuses to tear down to prove legal the tractor is
disqualified for season until proven legal. All teardowns will be conducted at the end of the pull. Any
work done to the tractor after a protest is filled must be done with a tech official present.

 ECONOMY STOCK 16hp

#1050

minimum of 5 entries required to run class

 Tractors with original type 1 or 2 cylinder engine with no modification other that OEM rebuild specs and parts (STOCK MEANS STOCK)

Engines may be replaced up to a 16 hp max , but must be of the original manufacturer's brand and design for the tractor being used

No altering of the frame to accept engine change allowed

 Gasoline only.

 Stock diameter front wheels, 3 rib tires permitted. Maximum rear tire size 23 x 10.50 x 12".Bar style or turf tires. No pro puller tires. No cutting permitted. No after market wheels , (all must be steel , welding permitted to widen to 10" max)

The hitch must have a minimum 1.5" diameter hole for sled hook and be 1/2" thick at point of hook, . A clevis may be used.  Maximum hitch hieght is 11"

The addition of weight bars is allowed , but no combination weight box seat mounts , all seats must be mounted as intended by the manufacturer

 Stock stroke and .030" overbore maximum for engine used.

OEM cam only. No after market or reground cams permitted. Cam must be of original spec for the engine being used

 Stock OEM size valves and valve seats. No porting. OEM head gaskets only.

 OEM cast flywheel only, with no cutting, welding, or adding weight.

 Gearing and pulley changes are not allowed , puller is responsible for showing documentation of original belt drive pully diameters.

Increasing clutch spring tentions will be allowed to prevent driveline from slipping

 Foot or hand throttle permitted. Max. 3600 rpm.

 OEM carburetor for engine. Must have stock air cleaner assembly for engine. Max venturi diameter of 1.00". No high performance fuel pumps. Choke must be installed and working.

 Exhaust pipes, with no muffler, must discharge vertically, 12" minimum from center of the bend.

Must maintain factory stance.

All tractors must be equipped with all standard safety equipment

 

 

 

 

 

 MAX STOCK CLASSES
1050 Lb.
1. Must be stock block Kohler, Briggs or Tecumseh single cylinder, flat head engines 15 hp and under,
with nine bolt heads. Max. 4000 rpm. Foot or hand throttle permitted.
2. Fuel maybe gasoline or VP C-12. No alcohol.
3. The engine must look stock on the outside. Must have stock stroke for engine, all other internal
modifications are acceptable. An access hole over the piston is recommended for checking purposes.
Aftermarket points and electronic ignition allowed.
4. The head may be after market or billet but must look like a OEM, i.e. must have fins; head bolts
must match a stock OEM head gasket. Head straps are allowed.
5. OEM cast flywheel with no cutting, welding, or adding weight or steel flywheels are acceptable.
6. Carburetor must be stock carb for engine or a Kohler or Walbro, carb spacers, velocity stacks and
bottom adjusts are acceptable. No high performance fuel pumps.
7. Exhaust pipes, with no muffler, must discharge vertically, 12" minimum from center of bend.
8. 26 x 12.00 x 12" max. rear tire size, with a maximum rollout of 78". Cutting permitted. No
professional pulling tires allowed, this includes, but not limited to tires by Dick Cepek, Lawn Tec, Pit
Bull and VM series of tires. After market wheels and 3 rib tires permitted.
9. 13" hitch height. The hitch must have a 1.5" diameter hole for sled hook and be 1/2" thick at point of
hook.
10. Must use stock garden tractor frame and transaxle, but may be modified for engine installation. No
portion of any tractor may exceed 7 feet forward of the center of the rear wheel, including weights. 52"
wheelbase maximum.
11. Engine tech items will be RPM with no tolerance, stock stroke, exterior appearance and no alcohol.
If engine is other than K-Kohler you must supply tech person with a stock head gasket for your engine.
12. Notes: 15hp NQS Hotstock tractors are legal in this class !^ HP are not

Front axel may be altered

YOUTH 1050# 4000 RPM Governed
16 HP 1050# 4000 RPM Governed

Stock appearing tractors with standard type 1 or 2 cylinder engine or equivalent replacement and stock
appearing drive train for make and model.

Transmission must match the stock frame being used , changing of oem appearing sheet metal make is allowed
Gasoline only. No alcohol or additives permitted. Maximum specific gravity of .750 (random testing
will be done).
23 x 10.50 - 12" maximum tire size. Any bar or turf tire.NO CUTTING permitted. No pro puller tires.
6, 8, or 10”diameter front rims. After market rims and 3 rib tires permitted.
Must maintain factory stance (no lowering).
11" hitch height, 16" maximum from center of rear axle to hook point. 1 1/2" diameter hole for sled
hook, 1/2" thick at point of hook.
4000 RPM at full throttle 0% tolerance also OEM governed.

Stock stroke and .030"
maximum overbore for engine used .
Must have cast camshaft (NO steel). Maximum valve lift: .325".
OEM cylinder head only. No welding or modfications. Must maintain original thickness except for surfacing.    Must utilize a head gasket , copper is allowed. NO aftermarket heads.
OEM valve seats and valves for factory rated H.P. of engine model being used.
Valves must remain in stock location in the block.

Bolt on filter adaptors are allowed maximum 1”
Original carburetor for engine used. NO spacers or velocity stacks. No bottom adjusts (Kohler only).
NO moved throttle shafts. NO aftermarket fuel pumps, regulators, or gauges. 1.000" maximum venturi
diameter. NO recast carburetors.
Steel flywheels allowed but not required. NO cutting, welding, or adding weight to flywheel. NO rotating counter weight on opposite end of crankshaft. Oem or aluminum pulles only with crank bolt and washer.
Must have reverse gear unless not original equipment.no welded or locker rears unless factory equipped
All overhead engines must use OEM valve train components. (The owner is responsible for tear down
to prove legality if required.)
Tech requirements: Removal of head,fuel pump/cam cover, and/or fuel lines for components and fuel
checks as requested. Refusing to comply with tech check is automatic disqualification.
Tech and class limits are subject to event host allowances

25 hp 4000 RPM Governed
1050#

Stock appearing tractors with standard engine or equivalent replacement and stock appearing drive
 Transmission must match the stock frame being used , changing of oem appearing sheet metal make is allowed .
Must run OEM or equivalent piston and rod. Stock stroke and .030” max overbore.
Piston can not be higher than zero deck.
MUST have the original carburetor and intake for engine model used. NO UPDATES ALLOWED!
NO aftermarket fuel pumps (must be stock mech pump).
Gasoline only. No alcohol or additives permitted.
Maximum specific gravity of .750 (random testing will be done).
4000 RPM MAX at full throttle.with oem mechanical govornor
Must have cast camshaft (NO steel).
All valve engines must use OEM valve train components.
MAXIMUM VALVE LIFT: .345 for solid lifters for flat head & .360 for hyd. Lifters.
OEM cylinder head, valve seats and valves for factory rated HP of engine model being used
No welding or grinding of combustion chamber.
Must maintain original head thickness except for re-surfacing.
. NO aftermarket heads.

Filter adaptor allowed 2” max length , no velocity stack

Copper head gaskets will be allowed
OEM cast or Steel flywheels allowed
 NO cutting, welding, or adding weight to flywheel.
NO rotating counter weight on opposite end of crankshaft.

Must have reverse gear unless not original equipment.
26 x 12 - 12" maximum tire size. 13" hitch height
Any bar or turf tire. NO CUTTING permitted. big bar puller tires allowed. 6”, 8’ 0r 10” diameter front rims. After market rims and 3 rib tires permitted.
Must maintain factory stance (no lowering).
Hitch point will be 6” minimum from center of rear axel
1 1/2" diameter hole for sled hook, 1/2" thick at point of hook.
Max 6’ from center line of rear wheels to front of weight bar.
Tech requirements:
Removal of head and fuel checks as requested. Refusing to comply with tech check is automatic
disqualification.

Aluminum starter pully with crank bolt and washer with start carts will be allowed

GOVERNED STOCK ALTERED
1050#


Single cylinder four cycle flathead engines only. Engines must be Kohler, Wisconsin, Tecumseh or
Briggs.
Engines must be factory productions or their OEM replacement.
Maximum crankshaft stroke 3.25" Maximum engine bore 3.780" 36.5000 cubic inch limit
Maximum engine valve size 1.380" Maximum engine valve lift .330"
Carburetor must be Kohler-type Carburetor must be mounted to the engine with no more than
1" spacer. Maximum carburetor venturi size 1.00" Air controlled by butterfly in stock position in
carburetor, no slides, no injection, naturally aspirated only. No air entering after 1.000" restriction.
Billet heads permitted Porting and polishing allowed
No external welding or external modifications allowed
Must have shielding opposite side of carb. 1/8:" steel or 3/16 alum and head strap
All thread through finned area is acceptable
Welding permitted in crankcase area of the block for repair.
No pressurized fuel tanks. No nitrous oxide
Racing Gasoline or Alcohol allowed. No additives.

Governed class rpm will be 5000 rpm with steel flywheel.
Starter pulley must be billet steel or alum. Factory starter pulleys and stamp steel are not allowed
Must run a factory appearing hood and grill
Maximum wheel base of 52" Max length of tractor is 7 foot from centerline of rear axle forward
Foot pegs, platforms and seats must be in stock location
Tractors must have garden tractor rear-ends Tractors must use stock garden tractor frames Frames
must maintain factory length.
Max Tire size is 26-12x12 pro pulling tires or cut tires allowed.
30 cu Tractors will be allowed to run in this class weighting 1000#. NO NITRO ALLOWED!

NATIONAL QUARTER SCALE PULLERS
STOCK ALTERED 1050#

A.) Single cylinder four cycle flathead engines only.
B.) Engines must be Kohler, Wisconsin, Tecumseh or Briggs.
C.) Engine blocks must have an OEM stock appearance.
D.) Engines must be factory productions or their OEM replacement with factory deck height.
E.) Stock Head bolt pattern =>stock head gasket must fit over studs or bolts.
F.) Stock Head bolt location and head bolt size.
G.) Maximum crankshaft stroke 3.25”
H.) Maximum engine bore 3.780”
I.) 36.5000 cubic inch limit
J.) Maximum engine valve size 1.380”
K.) Maximum engine valve lift .330”
L.) Maximum carburetor venturi size 1.00”, no air entering after 1.00” restriction, venturi must be
round in shape.
M.) Carburetor must be mounted to the engine with no more than 1” spacer
N.) No reverse port engines allowed, carburetor must go to the original intake port.
O.) Carburetor must be a stock appearing Kohler-type
P.) Billet heads permitted
Q.) Porting and polishing allowed
R.) No external welding or external modifications allowed
S.) All thread through finned area is acceptable
T.) Welding permitted in crankcase area of the block for repair.
U.) Methanol only. See Rule 4-E
V.) Must run a factory appearing hood and grill.
W.) Tractors must have garden tractor rear-ends.
X.) Tractors must use stock garden tractor frames.
Y.) Frames must maintain factory length.
Z.) Weight Class 1050 lbs.
AA.) Wheelbase: 52 inches maximum
BB.) Top placing tractors will be checked for, but not limited to: Fuel, Bore, Stroke, Carb Size, Valve
Lift & Valve
Size and deck height. Cubic Inch: 36.500 Cu. In. No Tolerance. Formula for CU. IN. is Measured bore
x measured
bore x measured stroke x .785 = Cu. In. All bores measured 90 degrees from thrust side.
Stroke: 3.250” maximum 0.010” measuring tolerance, must not exceed Cu. In. Limit.
Bore: 3.780” maximum 0.010” measuring tolerance, must not exceed Cu. In. Limit.
Carb: 1.000” venturi size maximum 0.001” measuring tolerance.
Valve Lift: .330” maximum 0.003” measuring tolerance
Valve Size: 1.380” maximum 0.001” measuring tolerance
Head Bolt Pattern: Stock Gasket must fit over head studs or bolts.

RULE CLARIFICATION: We are asked many times what can and cannot be done to the outside of the
engine in the port area. Below we have defined what we will allow and disallow. Any intake port will
be checked including one’s that have been braced or repaired, they will be checked for stock carb
mounting stud locations, center to center distance, height, and port location. Excessive and
unnecessary build-up on the outside of the intake port will result in disqualification. Build-up is port
epoxy, weld or bracing or any other means of distorting the port’s factory dimensions.

NOTE: Pullers, if you have the factory fan shrouding in place and during tear down the tech person
needs to inspect your engine’s intake port, you will be required to remove the shrouding, even if it
requires removing the engine from the chassis. So please have your intake port fully visible for the
tear down procedure.

30cube Tractors will be allowed to compete at a 50 pound weight break (1000 lb)

MODIFIED SINGLE
1050#

OEM produced engines (Kohler, Briggs, Tecumseh, Onan, etc.). After market STOCK ALTERED
KOHLER blocks allowed. Crankshaft and camshaft must be in original position.
Engines must use stock stroke & 4” bore max. Any valves, cams, etc.are permitted.
No welding or cutting to jugs.
Air restricting venturi may not be larger than 1.200" diameter.
Air controlled by butterfly, in stock position. Choke may be removed.
Recast carburetors are permitted.
Ungoverned engines must use steel (or aluminum) flywheel.
Cast flywheel must be governed to 4500 RPM maximum.
Ungoverned engines must have head plates or straps. Min.1/4" x 2" steel or 3/8" x 3" aluminum.
No carburetor to block spacers.
Velocity stacks permitted.
Deadman throttle spring mandatory.
Flywheel and clutch components must be shielded with 1/8" steel or 3/16" aluminum.
Starter pulleys must have sleeve, bolt, and washer on crank end.
Must have shield opposite side from camshaft- width of engine from frame to top of head,
1/8" steel or 3/16" aluminum minimum.
23 x 10.50 -12" rear tires maximum. Tire cutting allowed.
Gasoline or Alcohol, no additives. After market fuel pumps allowed.
10" hitch height, 16" maximum from center of the rear axle to hook point.
1 1/2" diameter hole for sled hook, 1/2" thick at point of hook.
Wheelbase and axle placement must be in original stock location

GOVERNED TWIN
1050#

OEM produced 30HP engines (Kohler, Briggs, Tecumseh, Onan, etc.), no after market blocks.
Crankshaft, camshaft, and valves must be in original position. Twin cyl only.
Engines must use stock OEM crank. 2.740 max stroke Any bore, valves, cams, etc. are permitted.
Welding to jugs or blocks permitted.
Carburetor venturi may not be larger than 1.200" diameter.
Two barrel Kohler carb must be stock venturi.
Air controlled by butterfly, in stock position. Choke may be removed.
OHV motors must run OEM Heads.
Flathead motors may run billet heads.
5000 rpm governed engines must use steel (or aluminum) flywheel.
Cast flywheel must be governed to 4500 RPM maximum.
All flat head engines must have head plates or straps.
Minimum of 1/4" x 2" steel or 3/8" x 3" aluminum.
OEM intake only, welding & grinding permitted..
2” Carb to manifold spacing allowed. Velocity stacks permitted.
Dead man throttle spring mandatory.
Flywheel and clutch components must be shielded with 1/8" steel or 3/16" aluminum.
26 x 12 -12" rear tires maximum. Pro-Puller tires allowed
Racing Gasoline or Alcohol allowed. No additives. After market fuel pumps allowed.
13" hitch height, 16" maximum from center of the rear axle to hook point.
1 1/2" diameter hole for sled hook, 1/2" thick at point of hook.
Max Wheelbase is 56” Maximum length of tractor is 8 foot from centerline of rear axle forward.
Tractor must have a hood & grill – Mix & match allowed.
Rear-ends must be of a lawn and garden type, but may be of a different manufacturer.
Transmission gear ratio changes or different dia pulleys are allowed. Reverse not required.
Frames must be OEM style. Welding and cutting permitted.
Rear fenders required. Fabricated fenders must be able to hold the weight of the driver.
NQS legal side shields required on all tractors.

Tractors with MSD ignition must confirm the proper chips are installed at the start of their pull

MODIFIED TWIN 25
1050#

OEM produced 30 HP engines (Kohler, Briggs, Tecumseh, Onan etc.), no after market blocks.
Crankshaft and camshaft must be in original position.
Any bore, stroke, valves, cams, etc. are permitted. Welding and cutting to jugs or blocks is allowed.
Billet or recast heads permitted.
Ungoverned engines must use steel (or aluminum) flywheel.
Cast flywheel must be governed to 4500 RPM maximum.
All flat head engines must have head plates or straps. Min. of 1/4" x 2" steel or 3/8" x 3" aluminum.
Tractors must have NQS legal sideshields 1/8 steel or 3/16 alum.
Any type of naturally aspirated induction is permitted.
Manifold may be home made.
Electronic Fuel Injection NOT allowed
Deadman throttle spring mandatory.
Flywheel and clutch components must be shielded with 1/8" steel or 3/16" aluminum.
26 x 12 -12" rear tires maximum. Pro-Puller tires allowed
Racing Gasoline or Alcohol allowed. No additives. After market fuel pumps allowed.
13" hitch height, 16" maximum from center of the rear axle to hook point.
1 1/2" diameter hole for sled hook, 1/2" thick at point of hook.
Max Wheelbase is 56” Maximum length of tractor is 8 foot from centerline of rear axle forward.
Tractor must have a hood & grill – Mix & match allowed.
Rear-ends must be of a lawn and garden type, but may of a different manufacturer.
Transmission gear ratio changes or different dia pulleys are allowed. Reverse not required.
Welding and cutting permitted on frames.
Rear fenders required. Fabricated fenders must be able to hold the weight of the driver.

NOTE:
We will now allow Governed Twins to compete in this class at 6000 RPM and weighed in at 1100 lb
as a weight break to compete in this division.
Governed tractors will be limited to OEM heads and a single 1.2 " Carb

NATIONAL QUARTER SCALE PULLERS
PRO STOCK 1050#
50.5 CUBIC INCH LIMIT
Single cylinder Pro-Stock is defined as having a one cylinder, air cooled four cycle flat head, two
valves same side, commercially produced manufactured cast block engine. Sleeves and welding
permitted. Commercially produced manufactured cast block means made by Kohler, Wisconsin,
Briggs, Tecumseh and etc. If copy is being made, copied block must meet basic manufactures specs for
that engine being copied. Crank and cam location, deck height, two valves same side, valve angle
(maximum valve angle of 6 degrees), intake and exhaust port location and factory head gasket bolt
pattern.
A stock appearing Kohler type carburetor must be used if other than stock for the model engine being
used. Stand off pipe or ram tubes are permitted. Choke may be removed. Single carburetor only. Air
restricting venturi must be in stock position or carburetor not to be larger diameter than 1.200". Air
controlled by butterfly in stock position in carburetor, no slides, no injection, naturally aspirated only.
No air entering after 1.200" restriction.
All tractors must have hood and grill.
Tractors must run alcohol (NO ADDITIVES). Fuel must remain essentially clear during water test.
Fuel can also be checked via Hydrometer-- .7928 Specific Gravity maximum. Comment: The NQS
uses as a rule for clarity is that in a 2" diameter jar the tech person must be able to see through the fuel
to their fingers on the other side jar. No fingers--no pass. PULLERS: You can check yourself before
the pull with plain tap water.
No pressurized fuel tanks, No Nitrous Oxide.
All final drive belts must be covered top 180 degrees and all flywheel and clutch assemblies must be
covered 360 degrees with 1/8" steel or 3/16" aluminum.
No weights to extend beyond rear tires.
Max Wheelbase is 56” Maximum length of tractor is 8 foot from centerline of rear axle forward.



SUPER STOCK 1050#
50.5 CUBIC INCH LIMIT
Any type of Naturally Aspirated induction is permitted.
All pro stock rules apply except carburetion.

Compact Diesel Pro Stock
(1) Engine will be no more than 3 cylinders. May be liquid or air cooled. .
(2) Engine will be no more than 75 cubic inches
(3) Water injection will be allowed.
(4) Engine modifications are permitted = Rods, Pistons, Cam, Fuel system.
(5)Head work is permitted on stock heads. No Billet heads. No overhead cams.
(6) Injector and injector pump modifications allowed. No Billet injector pumps.
(7) Turbo charging is permitted, but limited to one turbo only.
Turbo will be fitted with a shut down guillotine on the compressor inlet side of the
turbo. Exhaust “L” of turbo must have minimum of 5/16 cross in elbow with exhaust to
discharge vertically
(8) Electric fuel supply pump is permitted with positive power wire to have disconnect
at rear of tractor
9) No propane or nitrous of any kind will be permitted.
(10)Stock frames or stock appearing frame rails with full hood, grill and side shields
will be permitted- No tube frames. Chassis may be modified to accept engine.
(11) Must use a lawn mower rear end / transaxle. No cut down automotive rear ends or
Panzers
(12) Full metal side shields to cover engine area (minimum 16 gauge)
(13) Must run 5/16” cable around oil pan over top of valve cover in a complete circle
connected with cable clamps
(14) Must run steel flywheel and front engine pulleys should also be billet steel or aluminum,
no stanped steel, cast iron or cast aluminum pulleys.
(15) Clutch assembly and fly wheel must be surrounded 360 degrees with 1/8” metal or
3/8” aluminum
(16) 56” wheel base max.
(17) 7 feet from center of rear axle to front most portion of weights
(18) 13” hitch height.
(19) 26” x 12 x 12 tires max.
(20) 1100Ibs.Weight class.
(21) Dead man throttle required.
(22) Kill switch device mounted on rear of tractor must disconnect power to electric
fuel pump along with activating turbo guillotine
(23) Min. of 1 lbs fire extinguisher required.
(24) Wheelie bars are required, same specifications as all other classes.
(25) Engine block must have factory casting model and serial numbers, not ground off
(26) Full faced helmet required
(27) Engine must have OEM intake manifolds and exhaust manifolds, polishing is permitted

Open Super Stock

75 CI displacement limit

All tractors must conform with rules from thier class

Singles and twins allowed

 

 

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