NPPA RULES AND REGULATIONS 2011 & 2012
Officers for 2011 & 2012
President Bryan Banghart 402-443-6959
Vice President Brian Purchase 402-639-6112
Secretary Chris Vanatta 712-310-4434
Treasurer Kevin Sladky 402-480-2468
Website Manager Jeff Malousek 402-443-5958
TIs (2WD Street Mod)
Bryan Haas 712-527-9043
TIs (4WD Street Mod)
Brian Purchase 402-639-6112
TIs (Pro-Mod Diesel)
Jeff Malousek 402-443-5958
TIs (2WD Modified)
Aaron Dekkers 712-551-6630
TIs (4WD Mod/Super Mod)
Officer and T.I.s Discretion
TIs (Limited Pro-Stock Tractor)
Paul Kremlacek 402-432-4331
NEBRASKA POWER PULLERS GENERAL RULES
1. General rules apply to all classes except where individual classes state otherwise.
2. All contestants must be 16 years of age to pull. Any contestants between the ages of 16-18 years old must have a signed parental consent form.
3. Annual membership fee is $50.00 per person plus an insurance fee of $150.00. A $15.00 fee per hook is also required. (At time of event)
a. An annual membership fee must be paid in order to have your name registered on the mailing list for that year.
b. A one day membership/insurance may be purchased for a fee of $60.00.
c. Insurance fee waved with proof that you are an existing USPA member.
4. Vehicle must have a technical inspection (T.I.) before the first sanctioned pull. T.I. dates will be scheduled by the T.I.s. If you are unable to be inspected on a scheduled day, you must arrange a date with the T.I.s. All vehicles must be weighed on a T.I. certified scale.
a. You may be allowed a waiver on T.I. infractions for the first event as deemed acceptable by the elected officers. However, you must comply with the T.I. by the second event or otherwise specified date.
b. Either a one day or full membership fee must be paid before your vehicle is eligible for a T.I.
c. Any changes on vehicles are subject to re-inspection.
5. Fuel injection and forced induction not allowed unless permitted by the class rules.
6. Naturally aspirated engines only unless permitted by the class rules.
7. Nitrous Oxide not allowed unless specifically stated in class rules.
8. No dual rear wheels.
9. Only one automotive engine per vehicle unless class rules state otherwise.
10. All competitors in all divisions are required to use a numbered SFI 1.1/1.2 spec clutch, flywheel, and SFI 6.2/6.3 spec bell housing or SFI 4.1/4.2 spec scatter blanket. A signed and notarized clutch, flywheel, and bell housing/ scatter blanket liability statement must be on file with the NPPA for each competing year before qualifying for a T.I. inspection.
a. A certified public notary should be available to sign these statements at most every event.
11. Transmission bell housing and scatter blanket requirements:
a. All auto transmissions and torque converters must be covered 360 degrees from the rear of the engine block to the front of the tail shaft with an SFI 4.1 spec blanket. Blanket must be fastened to the engine block with two straps, one above and one below the crankshaft centerline. Blanket must have 6 of overlap on the bottom with straps that are 2 wide and no more than 1 apart.
b. All manual transmission clutches are required to be surrounded by an SFI 6.2/6.3 spec bell housing or a SFI 4.1/4.2 spec scatter blanket that covers the entire bell housing area from the rear of engine to the front of the transmission. Blanket must be fastened to the engine block with two straps, one above and one below the crankshaft centerline. Blanket must have 6 of overlap on the bottom with straps that are 2 wide and no more than 1 apart.
c. No holes allowed in the bell housing other than those put in by the manufacturer or used for clutch engagement purposes.
12. Driveline Requirements:
a. Any driveline between an engine and transmission or transfer case must be enclosed in 5/16 minimum steel or 3/8 aluminum. Inside diameter not to exceed 2 more than outside diameter of largest u-joint. Must be fastened every 6 with at least 3/8 Grade 5 bolts, or butt and seam welded and securely mounted to vehicle frame.
b. Any 2WD vehicle with a driveshaft shield 60 inches or longer that is not adequately secured in the middle must have a 2 nylon strap attached to the shield and to the frame.
c. All 4WD vehicles must have 3 round metal loops made of 5/16 steel or 3/8 aluminum (with 1/8 steel insert) around each driveshaft. End loops must be used to cover entire width of u-joint (a minimum of 6 wide) while the center loop must be at least Ύ in width. Inside diameter of loops must not be any more than 2 from the driveshaft or u-joint in any direction.
13. A minimum .060 thick aluminum or steel deflection shielding is required on both sides of all engines. Shielding must extend the complete length of block casting, cover the area of the block from the top of piston travel to 2 below crank centerline, and be securely fastened. Solid frame rails with no holes may serve as part of the shield.
14. All throttle linkages must be of a mechanical deadman style so that they will positively return to an idle position when released.
a. All carburetor or fuel injection butterfly throttle shafts must have dual return to idle arms and springs, one on each side.
b. Mechanical diesel injection pumps must have a visible return to idle spring on the throttle arm.
c. All foot operated throttle pedals must have a toe-strap.
15. All automatic transmissions must have a positive reverse gear lockout.
16. All harmonic balancers must be rated an SFI 18.1 spec. A bolt to hold the balancer to the crankshaft is required.
a. There must be a stop in front of the balancer to prevent balancer from working forward off of crankshaft in event that the bolts come loose. Engines which use the balancer as the crank trigger are exempt from having stops so long as the engine will shut down when the balancer moves no more than 1/4 forward off of the crankshaft.
17. All engine fans must be shrouded with 1/16 steel 360 degrees. Electric fans excluded.
18. All fuel lines must be steel braided or high pressure reinforced rubber. No plastic tubing allowed unless OEM installed and approved.
19. Fuel tanks may not be in engine or operators compartment.
20. Flip top vehicles must have a safety latch when the body is up and cannot be moved or driven in the up position under their own power.
a. Flip top body type vehicles and vehicles with less than two working doors must have glass lowered or removed during competition.
b. Vehicles with less than stock size window openings must have an escape hatch with a minimum size of 17x18.
21. If battery is inside of drivers compartment it must be safely enclosed and securely fastened down.
22. Must have an easily accessible lifting means on front of vehicle for removing vehicle from the track in case of breakage. (ex - hooks, hitch or weight bar)
23. Sled stops required to prevent vehicles from passing over buckboard of sled. Bottom to be maximum 24 from the ground and must extend beyond the rear most point of the vehicle. Must be of rigid construction.
24. Hitch must have a 3 wide x 3.5 deep loop for sled hookup, be made of steel and fastened to the frame. Must be stationary in all directions. Hitch must be easily accessible in order to be hooked from the protection of the sled.
25. A 2lb Halon or 2 ½ pound dry chemical fire extinguisher required on all vehicles. Must not be expired.
26. Radiator must have a burp tank.
27. All vehicles must have working brakes.
a. Four wheel drive vehicles must have working front brakes or driveline brake. Driveline brake must be surrounded 360 degrees with 3/8 thick steel and both ends closed with 1/8 thick steel.
b. Two wheel drive trucks must have working rear brakes with the exception of trucks that do not have planetaries. In this case, the truck must have working front brakes.
28. Minimum .060 thickness hub caps or protective devices required to protect from axle nut explosion or breakage.
29. All vehicles must have an approved fire wall with no openings larger than ½ around components going through.
30. Split rims not allowed.
31. White reverse light both to the rear of the vehicle and inside the cab visible by the operator and lit while vehicle is in reverse required in all classes.
32. No vehicle is to be left running without an NPPA member inside truck or the truck is dead manned. No riders or passengers allowed at any time.
33. Kill switches required on all vehicles.
a. Must be operated from the rear of the vehicle, mounted independent of the hitch, so that the sled can shut the vehicle down. There must also be a means of shutting the vehicle down within the drivers reach.
b. See class rules for specifics and types of kill switches needed.
34. Mandatory 4 point harness and racing seat.
35. A full fire suit meeting minimum SFI 3.2A-1 spec is required. This includes: Full face helmet with Snell 1985 or SFI 14.2 rating, head sock, shoes, pants, jacket, 360 degree neck collar meeting SFI 3.3 spec, and gloves.
a. Any vehicle that is tilt body without working doors or not having an approved firewall must wear a fire suit meeting SFI 3.2A-5 spec.
36. A bed cover is required when no floor is present inside of the box.
POINT SYSTEM
You must have a fully paid annual membership in order to receive any points
2 points for attending a meeting
5 points for technical inspection on time (scheduled T.I. dates only)
CLASS PLACING GOES AS FOLLOWS:
1 point for showing up (with paid hook fee)
5 points 1st place
4 points 2nd place
3 points 3rd place
2 points 4th place
1 point 5th place
DQ will lose all points for the class
No point penalty due to breakage
Note Points go to vehicle only. Different drivers allowed so long as they are an NPPA member.
TRACK RULES
1. Time limit is 3 minutes from the time the sled is ready until the vehicle is hooked.
2. All competing vehicles must remain within the boundaries of the contest course at all times during the pull.
3. Class weight includes everything needed to operate the vehicle. This includes but is not limited to driver, tires, rims, weight brackets, blocks, fuel, ect
4. All weights must be securely fastened in all classes. Rubber tarp straps and bungee cords will not be allowed.
5. Vehicle may only pull in one (1) class and two (2) weight divisions. No class jumping allowed. You must start and finish per hook with the same driver.
6. Draw for position: First puller of a given weight class has a choice to accept or re-pull in 3rd or last position.
a. A draw will be one pull prior for position of next pull.
b. Position in light class will be pre-determined via a card draw. Heavy class will have the opposite order of light class.
c. If sled failure occurs, this will give the 1st puller the 1st option for a re-pull. If declined, 2nd puller will become 1st puller.
7. An attempt must be made to qualify for an official pull.
a. Each puller is allowed two (2) attempts. An attempt is when puller does not go beyond 100 or has started to shut down before 100.
b. Any measurable movement by the sled is considered an attempt.
8. If floating finish boundaries do not apply after 300, this must be determined before each pull.
9. Tire changes allowed between weight classes. You must have your vehicle T.I.d with each set of tires and rims mounted to your vehicle. You cannot just weigh them. You must change them to T.I. them.
10. Disqualifications (DQ) are: Any vehicle parts on track not due to breakage, any unsportsmanship like conduct on the track, and any part of the vehicle that crosses the boundary lines. All safety equipment required per class rules must be used.
11. Protests allowed but they must be done before sanctioned event is over.
a. Protests must be made to the elected officials and appropriate fees are to be paid.
b. If investigated and puller is found illegal, fee is returned to protester and illegal puller is fined and/or ruled on according to committee.
c. $50.00 non-teardown per item. $200.00 for teardown per item.
d. Protest of weights or hitch must be done right after pull.
12. Reckless driving not tolerated.
a. First offense is a $50.00 fine.
b. Second offense you are suspended for the next pull.
c. Third offense you are suspended for the rest of the season.
13. Drivers will have a pit meeting with the track officials before each sanctioned event.
14. All ruling on the track stand as called by the track officials.
15. The use of profanity in a threatening manner or physical violence among pullers, pit crews, or directed to spectators is subject to investigation by elected officials and officers. Possible disqualification of future pulls, fines, or both.
16. Liability Statement Insurance does not apply to any claim arising from the consumption or distribution of any alcoholic beverage or illegal drugs. This exclusion applies to all allegations including, but not limited to, negligent hiring, placement, training, supervision, or to any act, error or omission relating to the consumption or distribution of any alcoholic beverage or illegal drugs.
WEIGHT CLASSES
2 WHEEL DRIVE STREET MODIFIED 6000lbs light 6000lbs heavy
2 WHEEL DRIVE MODIFIED 6000lbs light 6000lbs heavy
4 WHEEL DRIVE STREET MODIFIED 5800lbs light 6300lbs heavy (Bar Tires)
6000lbs light 6500lbs heavy (DOT Tires)
4 WHEEL DRIVE MODIFIED (OBSOLETE) - NOW PART OF SUPER-MOD-
SUPER-MODIFIED light and heavy at discretion of officers
4 WHEEL DRIVE PRO STREET DIESEL SMOKERS 7500lbs light 8000lbs heavy
Limited Pro-Stock Tractor 8000lbs light 9000lbs heavy
2 WHEEL DRIVE STREET MODIFIED CLASS RULES
1. Automotive 468 cubic inch limit. Motor must match make of vehicle.
2. Carburetor no cfm limit, factory fuel injection only, prom modification allowed. Only one carburetor allowed.
3. Aftermarket intake allowed. No tunnel rams.
4. No modifications to the frame other than reinforcement. No cut frames.
5. No body alterations with the exception of cut hoods to allow for headers and air cleaner.
6. Radiator must be in stock position. Engine must be in relatively stock position.
7. Stock appearing vehicle. No gutting of vehicle except heater box and gas tank can be removed. Front bumper must remain on vehicle.
8. Original suspension blocked only. Front and rear allowed.
9. Cepek, Goodyear, Firestone, or DOT approved bar tires (cutting allowed). Non-DOT or triple rib tires allowed on front with T.I. approval. Footprint for standard tire 31x15.5x15. Footprint for cut tire 33x15.5x15.
10. Hitch hook height is a maximum of 28. Hook point to be no closer than 30 from center of rear axle.
11. Stabilizer/wheelie bars required. Length must be a minimum of 2 back from furthermost point of the tire with a 5 square pad on the bottom. Maximum 6 high if within tire track or 10 high if not within tire track.
a. Cannot be connected to the drawbar.
12. Headers allowed, must have collectors running up and out.
13. No aftermarket or aluminum heads.
14. 2 ton rear end allowed.
15. ½ ton a-frame swap allowed allowed on Ύ ton. ½ ton straight axle allowed on any make or model.
16. Kill switch must disable both ignition system and fuel supply if electric.
2 WHEEL DRIVE MODIFIED CLASS RULES
1. 540 cubic inch limit. May use race fuel or alcohol.
2. Tractor or aftermarket Cepek tires. 36 height x 16.50 width or 16-1-18.4-38.
3. Automotive type engine.
4. Must have approved front glass, rear glass, and firewall.
5. Hitch hook height is a maximum of 30. Hook point to be no closer than 24 from center of rear axle on 15 and longer vehicles. Hook point to be no closer than 18 from center of rear axle on 15 and shorter vehicles.
6. Planetary drives and drop boxes allowed.
7. 2 speed truck rear ends allowed.
8. Stabilizer/wheelie bars required. Length must be a minimum of 2 back from furthermost point of the tire with a 5 square pad on the bottom. Maximum 6 high if within tire track or 10 high if not within tire track.
a. Cannot be connected to the drawbar.
9. Kill switch must disable both ignition system and fuel supply if electric.
4 WHEEL DRIVE STREET MODIFIED CLASS RULES
1. Automotive 485 cubic inch limit. Engine must match make of vehicle.
a. The two (2) existing 496 cubic inch engines will be grandfathered in until they are rebuilt. At that time they must be rebuilt down to class limits. 10-08
2. OEM cast iron and aftermarket cast iron heads. Aluminum heads are allowed but must have proof of documentation of OEM production.
a. Definition of OEM Production Any part or parts installed on a production run vehicle (car or truck) and its engine from the factory assembly line. Must be a genuine, matching, factory authorized OEM replacement part for that vehicle and its engine.
3. Carburetor no CFM limit, factory fuel injection only, prom modification allowed. Only one carburetor allowed.
4. Aftermarket intake allowed. No tunnel rams.
5. No modifications to frame other than reinforcement. No cut frames.
6. Stock appearing vehicle.
a. No body alterations allowed with the exception of the following: floor of box including inner fenders but must have a cover over box, stock fuel tank, heater box, rear springs, inner front fender can be removed, hood can be tilt and holes cut to allow for headers and air cleaner.
b. No open hood, battery and spark plugs must be covered. Stock seats can be removed.
c. Front bumper or suitable weight bracket must be in place.
7. Radiator must be in stock position. Engine must be in relatively stock position.
8. OEM suspension required on front axle. Rear axle may have rigid suspension. Any axle with OEM suspension is allowed to be blocked.
9. Cepek, Goodyear, firestone, and DOT approved bar tires with T.I. approval. Footprint for standard tire 31 x 15.5 x 15. DOT tires allowed up to 33 x 12.50 any rim. No cutting allowed.
10. Hitch hook height is a maximum of 26. Hook point to be no closer than 24 from center of rear axle.
11. Maximum 144 wheel base.
12. Fiberglass bodies and flat beds not allowed.
13. No aftermarket (non-OEM) transfer cases or transmissions. Drop boxes not allowed. Example No Pro-fab or SCS type quick-change transfer cases.
14. Headers allowed
a. Collectors are allowed to be run down and back but it is highly suggested that they be run up and out.
15. Front weight bracket can be no more than 60 from the center of the front axle.
16. Alcohol not allowed.
17. Kill switch must disable both ignition system and fuel supply if electric.
18. Recommended to have wheels no more than 6 off the ground within 6 of the forward most part of the vehicle. Wheels can be made to raise when not being used during competition. Can be no closer than 36 and minimum of 2 wide and 6 in diameter. Will be required in 2011.
4 WHEEL DRIVE MODIFIED CLASS RULES (OBSOLETE)
- THIS CLASS IS NOW PART OF SUPERMOD CLASS -
1. 650 cubic inch limit. Two (2) carburetors or injected alcohol with fuel shutoff allowed. Aftermarket cast iron and aluminum heads allowed.
2. Any fuel allowed.
3. Any transmission allowed. Planetary drives, aftermarket transfer cases, and drop boxes are allowed.
4. Rear of engine cannot be ahead of centerline of front axle.
5. Lift bodies allowed but must have an opening door.
6. Must have front wheelie bars that are able to support the weight of the truck.
7. 3 loop mounted on front of the vehicle for pull off.
8. Hitch hook height is a maximum of 26. Hook point to be no closer to center of rear axle than 36% of total wheel base.
9. Must have wheels no more than 6 off the ground within 6 of the forward most part of the vehicle. Wheels can be made to raise when not being used during competition. Can be no closer than 36 and minimum of 2 wide and 6 in diameter.
10. Maximum 20% angle on hitch. Hitch support cannot be ahead of center of rear axle.
11. Maximum 140 wheel base.
12. 2 speed truck rear ends allowed.
10. Kill switch must disable both ignition system and fuel supply if electric.
4WD PRO STREET DIESEL SMOKER CLASS RULES
1. 444 cubic inch limit. The engine must have been available as a factory option on one ton or smaller trucks.
2. Engine conversions and swaps allowed from one make to another. Example 5.9L Cummins into 1994 Ford pickup.
a. Radiator must be mounted behind grill in factory location. Engine must be mounted behind radiator in as close to stock location as possible.
3. Body must be stock appearing. No flatbeds. Must retain factory firewall and floor pan.
4. Factory OEM appearing driveline from a one ton or smaller truck.
a. This includes transmission, transfer case, and axles. Drive shafts, yokes, and u-joints may be a different size as necessary.
5. Water injection allowed. Alcohol, methanol and other flammables are prohibited.
a. Commercially available pump lube allowed.
6. Diesel fuel, soy/biodiesel, and racing diesel allowed. Secondary fuel prohibited. This includes but is not limited to propane, natural gas, methanol, ect All system components must be removed from the vehicle.
7. Kill switch Must have guillotine type air shutoff on inlet of atmospheric turbocharger. This must be operated from the rear of the vehicle so the sled can shut the vehicle down.
8. Exhaust must exit upward. Exhaust must have two (2) 3/8 bolts mounted in a cross pattern as close to the turbocharger as possible to prevent broken parts from exiting.
9. DOT tires only. Max tire size is 35 x 12.50 any rim.
10. Hitch hook height is a maximum of 26. Hook point to be no closer to the center of the rear axle than 30% of total wheelbase.
a. Hitch must be stationary in all directions.
11. Single and twin turbochargers allowed.
a. Single turbocharger limited to a 2.8 inducer on compressor. This may be measured using a 2.85 slug to verify size. Slug must not be able to make contact with compressor wheel or turbine shaft.
b. Twin turbochargers must be in a dual stage configuration. Size on primary (atmospheric turbo) is limited to a 2.8 inducer on compressor. This may be measured using a 2.85 slug to verify size. Slug must not be able to make contact with compressor wheel or turbine shaft.
12. Injection pump is limited to a max size of inline series P-pump or single CP3 pump. P-pump must retain OEM automotive style governor (RQV). No Sigma pumps or 12 cylinder P-pumps.
13. Front hanging weights must not exceed 60 from centerline of front axle. This is measured from the furthest most point (front) of the weight bracket and/or weights to the center of the front axle.
14. Recommended to have wheels no more than 6 off the ground within 6 of the forward most part of the vehicle. Wheels can be made to raise when not being used during competition. Can be no closer than 36 and minimum of 2 wide and 6 in diameter. Will be required in 2011.
SUPER MODIFIED CLASS RULES
1. 2 wheel drive and 4 wheel drive will compete in the same class.
2. Rules subject to change according to elected NPPA officials. This class may be used for vehicles which do not fit into any other NPPA class.
3. Any and all supercharger, turbocharger, aviation, marine, and industrial engine powered vehicles must comply with USPA safety rules as outlined in USPA handbook. Kill switch policies to conform with similar classes.
4. Automotive naturally aspirated single engine, forced induction, and alcohol allowed.
5. Hitch hook height is a maximum of 30. Hook point to be no closer than 24 from the center of the rear axle.
6. No wheelbase limit.
7. Front weight bracket can be no more than 60 from the center of the front axle on 4 wheel drives, and 24 from center of the front axle on 2 wheel drive.
8. Aftermarket transmissions, transfer cases, drop boxes, and planetary differentials allowed.
9. Stabilizer/wheelie bars required on 2WD vehicles. Length must be a minimum of 2 back from furthermost point of the tire with a 5 square pad on the bottom. Maximum 6 high if within tire track or 10 high if not within tire track.
a. Cannot be connected to the drawbar.
10. 4WD to have wheels no more than 6 off the ground within 6 of the forward most part of the vehicle. Wheels can be made to raise when not being used during competition. Can be no closer than 36 and minimum of 2 wide and 6 in diameter.
LIMITED PRO-STOCK TRACTOR CLASS RULES
1. 466 cubic inch limit
2. Engine head must be OEM agricultural-type for that brand engine.
3. No overhead cams allowed.
4. OEM stock intake and exhaust manifolds for that series engine.
5. Electric fans only.
6. Tractors are limited to one diesel injection pump. The maximum size is a P-series Bosch with one barrel and plunger for each engine cylinder.
7. Water injection allowed. Alcohol, methanol and other flammables are prohibited.
A. Commercially available pump lube allowed.
8. Diesel fuel, soy/biodiesel, and racing diesel allowed. Secondary fuel prohibited. This includes but is not limited to propane, natural gas, methanol, etc. All system components must be removed from the vehicle.
9. Kill switch Must have guillotine type air shutoff on inlet of atmospheric turbocharger. This must be operated from the rear of the vehicle so the sled can shut the vehicle down.
10. Exhaust must exit upward. Exhaust must have two (2) 3/8 bolts mounted in a cross pattern as close to the turbocharger as possible to prevent broken parts from exiting
11. Tires accepted are 24.5x32, 23.1x34, and 23.1x30. No larger allowed.
12. All tractors must have a wide front end.
13. All tractors must have front axle skid plates (skis). Specs are:
A. Skid plate must be mounted in line with each frame rail and extend from the center of the front axle forward (on both sides) equal in strength to frame rail material. Skid plate surface to be a minimum of 4 inches wide and 12 inches long with a minimum 6 inch curve when measured from the front most part of the rolled edge.
Or
B. Front axle support to be made of 2.00 x .095 chrome moly tubing or 2.00 x .120 mild steel tubing or same material as tractor frame rails. Front axle support should connect to each frame rail in line and extend toward front of tractor. Front skid/front axle support should be strong enough to support front end weight of tractor. Support should be a maximum of 4 inch ground clearance.
NOTE: Skid plate must be able to support the weight of the front end when checked with a jack. Maximum of 4 inch ground clearance.
14. All tractors up to 8200 lbs. regardless of division, must meet the following: Drawbar to be a minimum of 2 sq. inches total material (steel) at any point. This will include the area of the pin with the pin removed. Any pin will be minimum of 7/8". Drawbar must be equipped with a steel hitching device not more than 1 1/2" x 1 1/2" square (1 1/2" round stock); and with an oblong shaped hole 3 3/4" long and 3" wide.
15. All tractors over 8200 lbs. regardless of division, must meet the following: Drawbar to be a minimum of 2 1/2 sq. inches total material (steel) at any point. This will include the area of the pin with the pin removed. Any pin will be minimum of 15/16". Drawbar must be equipped with a steel hitching device not more than 1 1/2" x 1 1/2" square (1 1/2" round stock); and with an oblong shaped hole 3 3/4" long and 3" wide.
16. All tractors must utilize at least two ORM drawbar mounting bolts and attach them to the before described drawbar with at least two 3/8 inch x 2 inch steel straps. On tractors with "A" frame type drawbar support in the stock application, ie, 4010-4020 or all small block JD tractors that are supported by a load sensing shaft, the original mounting points for the straps would be the load sensing shaft.
17. All tractors using a clutch will be required to have a SFI SPEC 1.1 or SFI SPEC 1.2 steel plate or steel billet flywheel. The flywheels must be made of steel with the following mechanical properties: Tensile strength - 60,000 psi. Yield strength - 40,000 psi. if aluminum is used it also must be SFI SPEC 1.1. Positively no gray cast metal allowed in any flywheel and clutch component.
18. All tractors exceeding manufacturer's rated engine rpms are required to have an SFI SPEC 4.2 bellhousing blanket that meets the following minimum construction specifications: 17 inches wide and long enough to wrap around the bellhousing with at least 6 inch overlap; secured with six 2 inch wide nylon web straps with a steel D-ring on one end and sewn the length of the blanket (except for the overlap area), and long enough to pass back through D-ring and be tied in a saddle cinch; and with four 2 inch nylon web retaining straps each at the front and back of blanket.
19. The flywheel, clutch and pressure plate components on all vehicles in all classes must be SFI approved and numbered components. The flywheel, clutch and pressure plate components on all vehicles in all classes are subject to spot inspection.
20. Shielding on all tractors will be from sheet metal (hood) to 2" below bottom center of crankshaft throw, and be securely fastened. They may be louvered, but no expanded metal. All tractors that require tools for the removal of side shields must be equipped with an onboard fire control system. System must place one nozzle on each side of engine, inside the engine compartment. Not to be attached to the sheet metal.
21. Starter motors, fuel filters, oil filters and fuel injection pumps may not be used as shielding. Shielding may cover or pass behind starter or fuel pump.
22. Side shields must be mounted independently of the engine block. Motor mount, block saver plate and header mounting or chassis mounting is acceptable.
23. The kill switch on all tractors must be located in the rear center of the vehicle (maximum of 6" off center in any direction), approximately 4 feet above the point of hook.
24. On a diesel, the kill cable must activate the air shut-off required on all diesel engines. A cable may be used for this purpose, but must have positive type enclosed cable for the air shut-off. The cap must have spring loaded closing mechanism. System to be deemed acceptable must at least prevent building of boost. It is recommended that a gasket/seal arrangement be used to more effectively shut off air flow. door or rain cap type air shut-offs (no "butterfly" type) will be required on all self ignition engines with a separate control for driver. Control for driver not to be same as for sled. No electrical operated air shut-off.
25. Diesel and fuel-injected engines must have a fuel shut off valve control within easy reach of driver (your normal fuel shut-off on diesel pump). All diesel engines must be equipped with an emergency shutdown air shut-off at the air intake, which can be utilized from the tractor seat. Fuel-injected ignition engines, fuel shut-off to be located between the fuel pump and injection nozzle.
26. All tractors must utilize a roll cage and must have a five-point driver restraint harness and driver seat mounted to the roll cage structure, independent of the tractor chassis. The five-point restraint must be a quick-release design and be securely fastened during competition. Failure to use the restraint system will be grounds for disqualification. The following SFI specs will apply: SFI 47.1 for 6,001 lb. to 10,000 lb classes: SFI 47.2 for classes up to 6,000 lb.; SFI 47.3 for classes up to 2,000 lb. Front diagonal braces on all roll cages must be shielded with a minimum of .060 steel or aluminum on the inside of the driver's compartment to prevent any part of the competitor's body being caught upon exit. SFI Spec 45.1 roll cage padding is recommended in the head and shoulder area of the roll cages.
27. All vehicles with roll cages are required to have a quick release, removable or swing away steering wheel. Note: For ease of extraction of driver in event of injury.
28. All tractors must have a strong and rigid seat; all tip seats must be securely fastened while pulling. All seats must have side rails that are a minimum of 4" above the edge of the seat, must extend a minimum of one-half the distance from the back of the seat to the front edge; minimum strength equivalent to 1/2" pipe. If fenders are 6" or greater above the seat, and are 6" or less from the seat, no seat side rails are required. Seat will be thoroughly inspected by officials.
29. All tractors must have a shield between driver and tire (not necessarily a fender), to consist of a solid barrier between driver and any part of the rear tires sufficient to support weight of driver. The barrier must be a minimum of 6" wide at the bottom, increasing to a minimum of 36" wide at the top and the barrier must curl a minimum of 6" from vertical out over the tire in the same configuration as the tire.
30. Fenders or tire shields must be constructed so that when the drivers is seated and the hands are on the wheel, he cannot touch the rear tire with any part of his body.
31. Stabilizer bars are required (no wheels allowed). The drawbar and drawbar assembly will not in any way be attached to the stabilizer bar assembly. (See diagram below.) The stabilizer bar must extend a minimum of 32 inches behind a line (Fig. A) drawn from the center of the wheel (Fig. B) to the ground. Pad must not be more than 10 inches off the ground before competition. The stabilizer pad must be a minimum of 5 inches square (fig. E), with a minimum of 20 inches allowed from the outside of one pad to the other (Fig. F). No crossbars between stabilizer bars allowed behind point of hook.
32. All tractors in addition to stabilizer bars, must have a brace that extends vertically 12" from rear most tip of skid pads. There must be a support brace extending inward to frame, axle or top of stabilizer bar arms. Materials used must be of minimum strength of materials used for stabilizer bars. Design and material must withstand severe impact of sled. Vertical brace should extend rearward a minimum of 2" from the radius of rear tire.
33. All turbochargers not under the hood must be completely shrouded, except for inlet and exhaust pipes, with steel 0.060" or thicker. Turbochargers under fiberglass hoods must be completely shrouded with 0.060" metal under the area of the fiberglass, except for inlet and exhaust pipes.
34. Turbochargers allowed are: Schwietzer S300 with a maximum 3" inlet and 3" outlet (No map width enhancement groove allowed) OR Garrett GT42 small foot unmodified box turbo (Factory map width enhancement groove allowed)
35. No intercoolers allowed.
36. A tractor chassis shall consist of the following: the stock engine block or O.E.M. block that will operate with the stock crankshaft for that model without any alterations for chassis mounting. The stock transmission housing or manufacturer's replacement and the stock final drive housing or manufacturer's replacement. Engine and clutch housing to remain in original location and mounted solid as intended by original manufacturer. The O.E.M. engine block cannot be modified externally in any way except for normal repair or for mounting of fuel injection pumps. Internal webbing and water jacket to remain intact with provisions to rebore engine block be provided. The tractor chassis and frame must remain stock from rear of engine block to rear of the tractor on all tractors. The clutch housing, transmission case, rear end housing and axle housings must be O.E.M., no aluminum replacements. All engines must be secured and held rigid to O.E.M. chassis. Engine cannot move independent of rear end/transmission housing. No auxiliary internal combustion engines are allowed onboard to drive pumps, accessories, etc.
37. Tractors must have hood and grill in place as intended by the manufacturer. All engine clocks must remain in original location as located by manufacturer. Sheet metal to be stock length and in stock location. Criteria to be to maintain original appearance.
38. Maximum of 114" wheelbase, unless originally produced with longer wheelbase, then must remain stock length. Maximum length 13' from center of rear wheel to forward-most portion.
39. Metal deflection shield between driver and engine from to of hood to top of torque or trans housing or clutch housing from side shield to side shield. This also serves as a flash fire shield.
40. Turbo charged engines are required to have one (1) cable that must surround the engine block and head. This cable must be placed between the first and second cylinder through exhaust manifold port area. Cable must be a minimum of 3/8 in thickness. Cable must have a minimum of two (2) clamps at the slice. Cable must have approximately 4 inches of slack. Multiple-head engines require one cable per head.
41. All tractors must either run safety tie bars mounted to the rear axle housing with at least four (4) axle housing bolts and extending forward to flywheel area and fastened to side of block or main frame with at least two (2) 5/8" bolts, or a one piece frame extending from front of tractor to rear of axle housing mounting bolts. Tie bars or frame must be sufficient strength to support weight of tractor with the bolts used to split the tractor removed.
42. All safety blankets must be on the inside of tie bar and tie bar must be fastened forward of the rear of the engine block.
43. All ether bottles (starting aids) must be placed outside of engine compartment.
44. Vehicle must have a complete firewall with no holes except for controls. Holes not to exceed 1/2 inch larger than control.
45. All tractors required to shield all rotating mass mounted to front of crankshaft 360 degrees from front of engine block to inch in front of rotating mass. Shield to be from frame rail to frame rail by a minimum of .125 steel or aluminum, and fastened to frame on each side by a minimum of two evenly spaced bolts (3/8 inch Grade 5 minimum). The remainder of 360 degrees shield will be standard side and hood shielding. NOTE: Shield may be notched to allow belt to pass through and beneath frame to drive fuel or oil pump.
46. All tractors that utilize tube ladder-type frames must be covered on outside with steel or aluminum .060 thick.
47. All tractors are required to have a current SFI Spec 4.2 bellhousing blanket that meets the following minimum construction specifications:
A. Seventeen (17) inches wide and long enough to wrap around the bellhousing with at least a 6 inch overlap.
B. Secured with six (6) 2 inch wide nylon web straps with a steel D-ring on one end and sewn the length of the blanket (except for the overlap area), and long enough to pass back through the D-ring and be tied in a saddle cinch.
C. Four (4) 2 inch nylon web retaining straps each at the front and back of the blanket.
Updated 04-05-11