NATIONAL
QUARTER SCALE PULLERS
COMPLETE
RULES THROUGH 2012
GENERAL RULES:
1.) TRACK OFFICALS DECISION WILL BE FINAL. ANY DISAGREEMENT ON THEIR DECISION ON ANY POINT OF CONTROVERSY WILL RESULT IN DISQUALIFICATION FOR THAT CLASS FOR THE DAY. Comment: The track officials have the final say on what happens on the track.
YOUR TRACTOR MUST MEET ALL SAFETY AND SHIELDING REQUIREMENTS PRIOR TO HOOKING OTHERWISE YOU WILL NOT BE ALLOWED TO COMPETE AND THERE WILL BE NO REFUND OF ENTRY.
2.) Track Operations:
A.) Driver must put his tractor in a
neutral position and be hand pushed to the sled. Tractor must be shut down
before chain will be unhooked from tractor. Comment: Flag men will enforce this
rule for the safety of the track help.
See Rule 1.
B.) No portion of the tractor shall
interfere with the sled hitch during pull. Comment: Many times the starting
line becomes torn up, which will cause the front of the tractor to be lower
than the rear tires. This may cause an interference of the cross bar for the
wheelie wheels. The intent of the rule is not to interfere once the pull is
underway. See Rule 1.
C.) Any portion of tractor touching boundary
line during pull will result in disqualification. Comment: This would be
limited to the front or the rear tires. There is no out of bounds once the
tractor passes the full pull mark. See
Rule 1. The entire tractor must pass the
full pull mark.
D.) Two attempts will be allowed to start
sled except in pull-offs. One attempt only in a pull-off.
Comment:
An attempt is considered once the hook goes in the hitch and driver physically
tries to start the tractor in motion by revving up the engine and attempting to
release the clutch. See Rule 1.
E.) The first puller can drop five places
which mean he or she will actually start in the 6th position or they can come
back immediately. If they do drop, they drop to the 6th position.
F.) If a puller has a mechanical problem
they have to drop back 6 positions (five more pull then they hook). If there
are less than five tractors remaining, they have until the end of the heat plus
five (5) minutes. If they are not able to hook within the allotted time they
will receive last place in that heat. THE PULLER CAN NOT DROP TO ANOTHER HEAT -
it would be unfair to the others in those heats.
G.) Driver will be disqualified if he or she
delays contest: Comment: A puller is expected to have their tractor running by
the time the sled gets back to the starting point, If the puller delays more
than 90 seconds he will have to drop as discussed in Rule 2-F.
H.) Pulling position will be determined by
drawing. Comment: The drawing should be done prior to the event for the heats.
Pullers (individuals, siblings and spouses) with more than one tractor in a
class will be put in separate heats. It is recommended late entries the day of
the pull will be staggered throughout the line up and heats. All Classes having more than 30 or more
tractors will be run in heats. PS, SS
and SA will run in 4 heats with the top 7 in each heat going to the finals (28
tractors in finals) Pro Outlaw will run
in 2 heats with the top 7 going to the finals.
I.) Driver must remain seated during
pull. Drivers must have at least on hand
on the steering wheel at all times.
J.) Weight transfer sled will be used.
Comment: Either self-propelled or pull back.
Must be a 3 chain with the hook point within 2 or less of the
ground. All slam bars on sleds must be
mechanically operated. No air,
electrical or hydraulic slam devices accepted.
Recommend all sleds be a single axle design. Tandem axle sleds tend to steer tractors once
they are turned and tractors are more likely to become uncontrollable than with
single axle sleds.
K.) Tractors must be operated in a safe
manner at all times
L.) All weights must be safely secured to the tractor. Any excessive or obvious loss of weights or components may be cause for disqualification. Comment: The flagman must make the call during the pull. Any disqualification for loss of weight or component must be made during the pull. A pull is started when the sled starts to move and is ended when the sled stops movement, even though the tractor may still be under power.
M.) Track officials have the right to restart
the class anytime within the first seven (7), either for full pulls or short
Tracking.
N.) A tractor can only enter one time per
class.
O.) A
tractor engine can only pull one time during the finals, cannot be switched
from on tractor to another
AKA The Black Nichols Rule. A puller is able to put in a back up engine,
but not from another tractor pulling in the same finals.
3.) SAFETY: YOUR TRACTOR MUST MEET ALL SAFETY AND SHIELDING REQUIREMENTS PRIOR TO HOOKING OTHERWISE YOU WILL NOT BE ALLOWED TO COMPETE AND THERE WILL BE NO REFUND OF ENTRY.
A.) HELMETS AND FIRESUITS ARE
MANDATORY IN ALL CLASSES, MUST BE ZIPPED AND SECURED. FIRE SUITS must be a minimum requirement of
SFI 3.2A/1. Helmets must be a minimum
requirement of Snell 95.
B.) All tractors are required to have a
switch that will kill engine and fuel pump in case of chain or hitch breakage.
The switch will be located within range of six (6) either side of center of
back of tractor with a minimum of a 1.5 circle. Comment: Make sure it has an
adequate size ring in order to ease connecting to sled.
C.) All tractors must be equipped with a
dead man throttle.
D.) A minimum one (1) pound dry chemical
fire extinguisher or equivalent. Comment: A gauge on the fire extinguisher is
required. They can either be dry chemical
or CO/2-type extinguisher. The fire
extinguisher must be full.
E.) All exhaust must discharge vertically
and be securely attached. No more than
10 degrees out of straight upward allowed.
F.) All tractors must have safety device to
prevent turnovers. This device is to have wheels or skid plates. Wheels are to
be at least 1 wide and 5 in diameter. Skid plates to have at least 3 square
inches at ground contact point. Wheels or skid plates must be no less than 5
behind the rear tires and not more than 5 above the ground. This device must
be able to support the weight of the tractor. Comment: the tolerance on height
is + 1/4 (5 1/4) and behind tires - 1/4 (4 3/4)
G.) ALL engines must have a scatter shield
opposite the cam side of the motor; it must be of 1/8 steel or 3/16 aluminum.
It must cover full height and width of block and be attached in a secure manner
to frame and head or head plate. See
Section 11-B for V-Twin Shielding.
H.) All drivers should be clean and neatly
attired. Tractors should be clean and painted.
Drivers
under 18 years of age must have signed parental consent on file.
I.) Obvious or excessive consumption of
alcoholic beverages or drugs will be grounds for disqualification.
J.) 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 and be securely fastened to the frame
or engine.
K.) Engine Dampers must meet requirements of
SFI Spec 18.1 is required. A bolt is
required to secure damper to crank. FLYWHEELS and STARTER PULLEYS must be of
billet steel or aluminum (no cast or stamped steel pulleys). No welded on fins.
All starter pulleys must have a retaining device to prevent pulley from coming
off crankshaft.
L.) All tractors to be equipped with workable
brakes.
M.) Fenders: Fenders must extend a minimum of
4 in width and must cover the front of tire to its furthest point
forward. It is recommended that the foot
step be connected to front of fender to avoid your foot being pulled in by the
tire.
N.) NQS Tech official reserve the right to
implement rule changes for safety and heath reasons at any time.
4.) Chassis:
A.) Open to two-wheel drive, rubber tired
tractors, no dual wheels, chains or spikes. TIRES MUST BE NO LARGER THAN
26X12X12 FOR ALL TRACTORS.
B.)
All tractors must have at least a 3 seat back on all seats. Seat back must be rigid enough not to flex
down excessively when leaned upon. 45
degree angle max
C.) Drawbar will be horizontal and
stationary in all directions. With hitching device not more than 3/4 in
thickness and must have a 1 1/2 width/depth for hook. Pulling point may not be
more than 3/4 from back edge of hitching device parallel to and not more than
13 above the ground. Comment: Pulling hitch should be made of steel.
D.) No portion of any tractor may exceed 6
feet in width. No portion of any tractor (except stock altered) may exceed 8
feet forward of the center of the rear wheel, including weights. Stock Altered
is 7 feet forward of the center of the rear wheel. Comment: No tolerance on the overall length.
E.) All tractors in all classes are to run Methanol, with no
additives (except for diesel fueled tractors).
There are two U.S. Federal Grades.
Grade A and AA. Either grade is
permitted to use. Pullers should ensure
that the methanol they purchase meets federal standards of purity. Methanol is tested at all NQS events by
various chemical analyses as considered appropriate by the NQS Fuel Tech personnel.
Deviation from the standards listed below in the fuel sample will result in
disqualification. Methanol is a
hygroscopic substance and readily absorbs moisture from the air, which rapidly
renders methanol illegal as a fuel for use in NQS pulling. Pullers are cautioned to keep methanol
containers tightly sealed at all times to minimize the absorption of water.
Specification
for Pure Methanol:
Grade A
Grade AA
Methanol
Content, wt %, min.
99.85% 99.85%
Acetone
and Aldehydes, ppm, max.
30 30
Acetone,
ppm, max.
20 20
Ethanol,
ppm, max. 10
Acid
(as acetic acid), ppm, max.
30
Water
content, ppm, max.
1500 1000
Specific
gravity, 20∞C
.7928 .7928
Permanganate
time, min.
30 30
Odor Characteristic
Distillation
range @ 101 kPa
Not more than 1∞C, including 64.6 +/-
0.1∞C at 760mmHg
Color,
platinum-cobalt scale, mix
5 5
Appearance Colorless-clear
Residual
on evaporation, g/100mL
.001 .001
Carbonizable
impurities; color
platinum-cobalt
scale, max.
30 30
Diesel fueled tractors must run diesel only with a
dielectric value of no greater then 4.9 or less than 2.2. The dielectric meter shall use Cyclohexane to
establish the zero reference point in determining all diesel fuel dielectric
constant values. The use of additives containing oxygen, such as nitromethane,
propylene oxide, dioaxane, MTBE, alcohol (methanol), or nitrous oxide is
prohibited. These additives, and others
of the oxygen-bearing family, will significantly change the dielectric values
of diesel fuel.
F.) Electronic Fuel Injection is allowed
only in Pro Outlaw and Open Super Stock Classes (non diesel-fueled engines).
G.) No pressurized fuel tanks, No Nitrous
Oxide.
H.) No weights to extend beyond rear tires.
I.) No reverse port engines in either Pro Stock, Stock
Altered or Lite Pro Stock Classes.
5.)
Tear down and Illegal Vehicles:
A.) All top money winners will have their
engines checked for
legality. Teching will include, but not
limited to the engine. Remember, if you
dont want the NQS tech official to see parts of your engine that is not
involved with the tear down process, cover it up. Any person who refuses to be
inspected for eligibility by routine check of money winners shall not be
allowed to enter and/or pull in the class in question until legality is
checked. See Rule #1.
B.) Tractors that fail the engine tear down
will be removed from the NQS Points Championship. You will be able to compete at the events
after your vehicle is checked for legality after the infraction occurred and
the disqualification is only for the remainder of the season. Overweight, over length, hitch height
infraction, failing the fuel test or the carb check will result in no points
for that class for that day.
Out-of-bounds will result in last place points for that heat for that
class. V-Twin and Diesel engines will be
pumped to check Cubic Inch.
C.)
Illegal Parts. The NQS reserves
the right that they may confiscate illegal parts and display them at the events
and on the NQS web site (www.nqspulling.com).
D.) Propylene Oxide is prohibited in all
classes.
E.) NQS Tech Officials can overrule any
misprints in these rules.
6.)
PRO STOCK RULES
1050
LBS 50.5 CUBIC INCH LIMIT
A.) 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
B.) 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 and 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. Venturi must
be round in shape.
C.)
Methanol only. See Rule 4-E
D.) All
tractors must have hood and grill.
E.)
Wheelbase 56 inches maximum.
F.) Top
placing tractors will be checked for, but not limited to: Fuel, Deck Height, Carburetor,
Cubic Inch and Factory Head Gasket Bolt Pattern. CU. IN.: 50.500 Cu. In. zero 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. Stock Head bolt pattern =>stock
head gasket must fit over studs or bolts.
7.)
SUPER STOCK RULES
1050
LBS 50.5 CUBIC INCH LIMIT
30
CUBIC INCH RULES 950 LBS
A.) Single cylinder Super Stock is defined
as any tractor having one cylinder, air cooled four cycle, flat head, two
valves same side of engine.
B.) Any type of Naturally Aspirated
induction is permitted.
C.).Methanol only. See Rule 4-E
D.) All tractors must have hood and grill.
E.) Wheelbase 56 inches maximum.
F.) Top placing tractors will be checked
for, but not limited to: Fuel and Cubic Inch Limit. CU. IN.: 50.500 Cu. In. zero tolerance and
30.000 Cu. In. zero 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.
8.) LITE
PRO STOCK RULES
A.) Single
cylinder four cycle flathead engines only.
B.) Engines must be
C.) Engine blocks must have an OEM stock
appearance. (only blocks for Kohler are stock blocks and MWSC SA blocks)
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.) Maximum crankshaft stroke 3.25
G.) Maximum engine bore 3.830
H.)
37.5000 cubic inch limit
I.) Maximum carburetor venturi size 1.20,
no air entering after 1.20 restriction, venturi must be round in shape.
J.) No reverse port engines allowed
carburetor must go to the original intake port.
K.) Carburetor must be a stock appearing
Kohler-type
L.)
Billet heads permitted
M.) Porting and polishing allowed
N.) Methanol only. See Rule 4-E
O.) Weight Class 1000 lbs.
P.) Hitch Height 13
Q.) Port welding allowed, but no bore
welding
R.) Nitro 30 cubic Inch engines are now part
of this class. Engines have a maximum
venturi size 1.200 for carburetor or 1.200 throat for fuel injected
engines. Methanol fueled engines can
have any type of Naturally Aspirated induction.
For Methanol See Rule 4-E. . Only Nitro methane will be accepted for
Nitro, no other types allowed. They will
pull at the same weight
1000# 13 hitch height
S.)
NQS 30 Cubic Inch tractor can run in this class at 1000# with a 13
hitch.
T.) Top placing tractors will be checked
for, but not limited to: Fuel, Bore, Stroke, Carb Size, head bolt pattern and
deck height. Cubic Inch: 37.500 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.
U.) 96" overall length with a 56" wheelbase.
side.
9.)
STOCK ALTERED RULES
A.) Single cylinder four cycle flathead
engines only.
B.) Engines must be
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. and 1100 lbs. (2
separate classes)
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.
10.) 39 C.I. ALTERED V-TWIN CLASS
A.) All General Rules Apply:
B.) Engine shielding rules: 1/8 steel or 3/16 aluminum on external side
of cylinder extending from head gasket to frame. Shield must be attached to frame at the
bottom and to the flywheel shield at the top to make rigid.
C.) Maximum overall length will be 96 (same
as pro/super stock)
D.) Maximum wheelbase will be 56 (same as
pro/super stock)
E.) Maximum weight will be 1000 lbs.
F.) Maximum hitch height will be 13 (same
as general rules)
G.) Engines:
Must be a commercially available lawn and/or garden tractor engine. Only configuration accepted is V-Twin type.
H.) Maximum engine size is 39.0 cubic inches
I.) Cylinder Head: Must be stock head with no external
welding. Epoxy Okay. No valve restrictions
J.) Carburetor: Limited to one (1) carburetor with one (1)
venturi with one (1) throttle butterfly.
Maximum venturi size will be 1.200.
No air entering after the 1.200 restriction.
K.) Steel flywheel mandatory, along with the
general flywheel shielding rules of 1/8 steel or 3/16 aluminum 360 degrees.
L.) Fuel: Methanol only as per the General
rules
.
11.) Open SUPER
STOCK Class 1150#
A.) All General Rules and Super Stock
Rules apply, except the following:
Shielding: Engine shielding rules:
1/8 steel or 3/16 aluminum on external side of cylinder extending from
head gasket to frame. Shield must be
attached to frame at the bottom and to the flywheel shield at the top to make
rigid. V-Twins: 1/8 steel or 3/16 aluminum on external side
of cylinder extending from head gasket to frame. Shield must be attached to frame at the
bottom and to the flywheel shield at the top to make rigid.
B.) No motorcycle,
aircraft, marine or automotive type engines permitted. Block may be copied, but must meet basic
manufactures specifications. OHV or flat
head.
C.)
Maximum of 3 cylinder engines, no cut down 4 cylinder or larger engines
permitted. Diesel-fueled engines (see
diesel rules below in 11-G).
D.)
Maximum of 75 cubic inches.
E.) Any
type of naturally aspirated induction is permitted. Methanol only in non-diesel
engines.
F.) Flat
heads can run nitro.
G.) DIESEL RULES: Factory 3 Cylinder air or liquid cooled
diesels (no cut down 4 cylinder engines)
1. 75 cubic inch limit
2. Water injection permitted, water or
water soluble oil mixture only.
3. Stock head for engine make and model, no external
welding except for repair.
4. No overhead cam engines
5. Stock OEM intake and exhaust manifold. Porting and polishing allowed no tube
manifolds.
6. Engine block model and serial numbers must be visible.
7. Stock or Component frame with stock appearing garden,
compact or farm tractor sheet metal with full engine shields (side shields must
be a minimum of 1/16 steel or aluminum).
Tube chassis must be covered with sheet metal.
8. No billet fuel injector pumps or electronic fuel
injection.
9. Limited to one (1) turbo, no size restriction
10. No intercoolers or ice boxes
11. Kill switch must shut off electric fuel pump and shut
air off on compressor side of turbo.
12. Exhaust L of turbo must have minimum of 5/16 cross
in elbow with exhaust to discharge vertically.
13. No propane or nitrous of any kind.
14. Must run 1/4 cable around oil pan over top of valve
cover in between #1 and #2 cylinder in a complete circle connected with cable
clamps (minimum of two clamps).
15. Steel flywheel required with flywheel inspection hole
in bell housing.
16. Flywheel, front cast pulleys and clutch must be
shielded 360 degrees with 1/8 steel or 3/16 aluminum. SFI approved scatter blanket also acceptable.
17. No belt driven cooling fans allowed, must be electric
fans.
18. All other general rules apply.
H.)
1. Motors must have a motor
shield, minimum 1/8 inch steel or 3/16 inch aluminum.
2. Each battery or battery
pack must be secured with bolts and/or straps commensurate with the size and
weight of the battery.
3. Flooded Batteries must
be completely enclosed. AGM, Gel and Lithium batteries do not require this.
4. All traction wiring must
be isolated from the chassis.
5. All battery packs must
have over-current protection. Circuit breakers or fuses permitted. Device must
have a DC voltage rating equal to or greater than the nominal pack voltage.
6. All tractors must have a
visible indication of a live tractor.
7. Traction battery pack
must be physically disconnected when switch is in the off position.
Electrically or mechanically operator contactor is allowed. The kill switch
or safety contactor may not routinely open or close under load. Semiconductors
or controller shutdown are not sufficient.
8. Must get power only from the batteries while the pull
is in progress (no Hybrid Designs)
I.)
Weight is 1150 Lbs.
11.) PRO V-Twin
A.) All General Rules Apply:
B.) Engine shielding rules: 1/8 steel or 3/16 aluminum on external side
of cylinder extending from head gasket to frame. Shield must be attached to frame at the
bottom and to the flywheel shield at the top to make rigid.
C.) Maximum overall length will be 96 (same
as pro/super stock)
D.) Maximum wheelbase will be 56 (same as
pro/super stock)
E.) Maximum weight will be 1050 lbs.
F.) Maximum hitch height will be 13 (same
as general rules)
G.) Engines:
Must be a commercially available lawn and/or garden tractor engine. Only configuration accepted is V-twin type.
H.) Maximum engine size is 45.5 cubic inches
I.)
Cylinder Head: Must be stock appearing
cast head. No valve restrictions
J.) Carburetor: Limited to one (1) carburetor with one (1)
venturi with one (1) throttle butterfly.
Maximum venturi size will be 1.200.
No air entering after the 1.200 restriction.
K.) Steel flywheel mandatory, along with the
general flywheel shielding rules of 1/8 steel or 3/16 aluminum 360 degrees.
L.) Fuel: Methanol only as per the General
rules
12.) PRO OUTLAW
A.) NQS Super Stock and NQS Pro V-Twin run
together. NQS Super Stock runs at 1050
lbs with 13 hitch and NQS Pro V-twins run at 1000 lbs. and a 12.5 hitch
height.
B.) These rules can be changed in order to
promote fairness of the types tractors at anytime during the season.
13.) LITE OUTLAW
A.)
NQS Lite Pro Stock and NQS 39 C.I. Altered V-twin run together. NQS Lite Pro Stock runs at 1000 lbs. with a
13 hitch and NQS 39 C.I. Altered V-twin run at 950 lbs with a 12.5 hitch
height.
B.) These rules can be changed in order to
promote fairness of the types tractors at anytime during the season.
C.) NQS 30 Cubic Inch tractor can run in
this class at 1000# with a 13 hitch
14.) Hot Stock One Cylinder Flat Head:
All General rules apply, except for the
following:
A.) Fire suits are not required, but
helmets are required.
B.)
Engines are governor to a maximum RPM of 4,000 RPM for 15HP rating and
below and 3,500 RPM for 16hp rating and above.
RPM will be checked after the tractor makes its run, no tolerance. Stock Blocks only, no aftermarkets.
C.) Fuel is to be VP C-12 (green in
color) with no additives. The NQS uses
dielectric test, hydrometer test and acid test for the fuel check.
D.) Steel flywheels are mandatory.
E.) No portion of any tractor may
exceed 7 feet forward of the center of the rear
wheel, including weights. 52 wheelbase maximum.
F.) No internal engine restrictions,
except must be stock stroke for make and model being entered. Engine block must be stock OEM. Must run stock heads (no recast), no head
hold downs, no all thread through cooling fins, no external cam pins. Aftermarket points and electronic ignition
allowed. Engine block must be totally
stock appearing on the outside of block, including head gasket.
G:) Maximum tire size is 26x12x12. Tire cutting allowed.
H.)
Weight class is 1050 lbs.
I.) Carb must be stock appearing.
Velocity stacks allowed. Maximum carburetor venturi size 1.00, no air
entering after 1.00 restriction, venturi must be round in
shape. No stand off (ram tubes) permitted.
J.) Must use stock garden tractor
frame and transaxle, but may be modified for engine installation.
15.) Hot Stock V-Twin:
A.) All General rules apply, except
for the following: No fire suits are required, but helmets are.
B.)
V-Twin and Opposed Twin Engines Only.
Engines with a factory horsepower rating of 25hp or less, they are
governor to a maximum RPM of 4,000 RPM.
C.) Fuel is to be VP C-12 (green in
color) with no additives.
D.) Steel flywheels are mandatory.
E.) No portion of any tractor may
exceed 7 feet forward of the center of the rear
wheel, including weights. 52 Wheelbase maximum.
F.) No internal engine restrictions,
but engine must be stock appearing. Must
run stock heads (no recast) with no external modifications. Engine must be stock appearing on the outside
of the engine. Factory shrouding is
optional.
G:) Maximum tire size is 26x12x12. Tire cutting allowed.
H.)
Weight class is 1050 lbs.
I.) Carb must be stock appearing for make and model being entered. Velocity stacks allowed. Maximum carburetor
venturi size 1.00, no air entering after 1.00 restriction, venturi must be
round in shape. 2 barrel carbs allowed
if factory equipped and each venturi is smaller than 22mm. No external modifications to stock intake
manifold. No stand off (ram tubes)
permitted.
J.) Must use stock garden tractor
frame and transaxle, but may be modified for engine installation.