Classes
1050 Lb. Stock
1100 Lb. Sportsman Stock
1150 Lb. Altered Stock
1200 Lb. Pro Modified
1300 Lb. Small Bike 650cc
1300 Lb. Super Bike 1200cc
1500 Lb. Mini Rod 4-cyl
1500 Lb. Open
1700 Lb. Econo Modified 8-cyl.
1950 Lb. Modified 8-cyl
2wd Modified Truck
.
1050 Lb. Stock
1. Stock engine only not exceeding 14 HP and 32 cubic inches from the OEM,
maximum .030" over bore.
2. 0.330 Maximum cam lift.
3. Maximum 1" venturi carburetor.
4. Throttle to be run through a working governor, 4000 rpm maximum.
5. Porting and polishing is not allowed.
6. Gasoline or diesel only.
7. Maximum tractor length shall not exceed 6'6" from center of rear axle.
8. Tractor must have hood and grill.
9. Maximum drive tire size: 23x10.5x12.
10. Transmission gear ratio changes allowed.
1100 Lb. Sportsman Stock
1. Stock engine only not exceeding 25 HP and 50 cubic inches from the OEM.
2. Maximum drive tire size: 26x12x12
3. All other rules are the same as the 1050 Lb. Stock class.
NOTICE: At two hook events, if 7 or more stock tractors register in either stock class, the pull in that class for the day will be run as an elimination event. All registered tractors will pull in the first pull, however only the top 5 will pull in the second pull. See general rules for points explanation.
1150 Lb. Altered Stock
1. Engine may not exceed 45 cubic inch.
2. Must have garden tractor type carburetor, 1.2" maximum venturi.
3. Porting and polishing allowed.
4. Stock valve diameters only for block being used.
5. No aftermarket blocks.
6. No performance aftermarket heads. Head modifications are allowed.
7. Gasoline, diesel or alcohol.
8 .Over 4000 rpm requires steel or billet flywheel with minimum 1/8" steel or 3/16"
aluminum 360 degree shield.
9. Camshaft modifications allowed.
10. Engines must be naturally aspirated.
11. Maximum tractor length shall not exceed 6'6" from center of rear axle.
12. Tractor must have hood and grill.
13. Maximum drive tire size: 26x12x12.
1200 Lb. Pro Modified
1. Any combination of engines allowed, excluding automotive, motorcycle,
snowmobile, or ATV type engines.
2. Gas, alcohol, or diesel only. Propane injection allowed on diesels only, see rule
# 6 under "Tractor" in General Rules.
3. Turbochargers allowed on diesels only.
4. Maximum tractor length shall not exceed 6'6" from center of rear axle.
5. Maximum tire size: 26x12x12.
6. All other modifications allowed.
1300 Lb. Motorcycle (Small Bike and Super Bike)
Small Bike maximum 650 CC OEM, Super Bike maximum 1200 CC OEM. All other rules are the same for the 2 classes.
1. Gas or alcohol only.
2. Hood and grill optional.
3. Tractor must be equipped with a minimum 3/8 inch cable securely attached to
differential housing or frame, extending around hitch point so that it lies within
sled hook.
4. Naturally aspirated motorcycle engines only.
5. Tractor width shall not exceed 60". Maximum tractor length shall not
exceed 8' from center of rear axle.
6. Rotating parts and chains must to shielded top 180 degrees with minimum 1/8"
steel or 3/16" aluminum. Frame rails may be considered shielding if made of
proper thickness.
7. Maximum drive tire size: 26x12x12.
1500 Lb Mini Rod 4-cyl
1. Engine must be OEM block not to exceed 4 cylinders.
2. Gas, alcohol or diesel fuel only, turbochargers and superchargers allowed.
Superchargers must have adequate restraint to prevent blower lift off.
3. Diesel engine tractors only may run any combination of propane injection,
methanol/water injection, or nitrous oxide injection as power adders only. For
propane injection, see rule # 6 under "Tractor" in General Rules.
4. All tractors with flywheels must have SFI approved housings or the clutch,
pressure plate and flywheel must be shielded 360 degrees with minimum 4" wide
x 3/16" steel or 1/4" aluminum.
5. Flex plates must have SFI approved shield or minimum 3/16" steel or 1/4" aluminum, 4 inch wide shield on top 180 degrees.
6. Automatic transmissions must have SFI approved scatter blanket or scatter
shield.
7. Rotating parts and drive chains must have the top 180 degrees shielded
with minimum 1/8" steel or 3/16" aluminum. Frame rails may be considered
shielding if made of proper thickness. Drive shafts with u-joints on both ends
must have loop(s) within 4" of each u-joint.
8. Tractor must be equipped with a minimum 3/8" cable securely attached to
differential housing or frame, extending around hitch point so that it lies within
sled hook.
9. Tractor width shall not exceed 60". Maximum tractor length shall not exceed 8'
from center of rear axle.
10. Maximum drive tire size: 26x12x12.
11. Drivers in this class must be at least 14 years old.
Requirements for the following classes are the same as the Mini Rod 4 Cylinder class except for any listed changes.
1500 Lb. Open
1. Any tractor pulling in this open class must meet all general safety rules and other regulations.
2. Any engine or combination of engines allowed.
3. Maximum tractor length shall not exceed 8' 6" from center of rear axle, width not to exceed 60".
4. Maximum drive tire size: 26x12x12
5. The 800 - 899 numbers apply only to tractors built specifically for this class. Any others competing in this class may run current class number.
1700 Lb. Econo Modified 8-cyl
1. Engine must be OEM block not to exceed 8 cylinders.
2. Naturally aspirated engines only.
3. Gas or alcohol only.
4. Single carburetor only.
5. No aluminum heads.
6. Drivers in this class must be at least 16 years old.
1950 Lb. Modified 8- cyl
1. Engine must be OEM block.
2. On any block recognized by the OEM as a "Big Block" engine, only flat tappet
cams are allowed. (Ford FE blocks are big blocks).
3. Naturally aspirated engines only.
4. Gas or alcohol only.
5. Maximum drive tire size: 31x15.50x15.
6. Maximum width 72".
7. A 4 point frame mount roll cage of round or square tubing with .090 wall thickness
and 1 ½" minimum o.d. recommended. Cage must enclose the driver and be
capable of supportng the competion weight of the tractor. Mininum 4 pt safety
harness recommended. Minimum requirement will be a rollbar at least .125 thick
x 2" o.d., and of adequate height and placement to protect driver in event of a
rollover. Lap belt also required.
8. Drivers in this class must be at least 18 years old.
2WD Modified Truck Rules Click Here
TMTPA OFFICIALS DECISIONS AND DIRECTIVES ARE FINAL AND TMTPA OFFICIALS RESERVE THE RIGHT TO REFUSE ENTRY TO ANY PULLER OR TRACTOR.
PULLING WITH US IS MORE THAN JUST A DRAG!
