LIMITED PRO STOCK/SUPER FARM TRACTORS
1. All tractors will be required to have a 47.1 SFI Spec. roll-over protection.
2. All Limited Pro Stock/Super Farm Tractors are allowed a maximum tire size of 24.5x32.
3. All Limited Pro Stock/Super Farm tractors must utilize an OEM (Ag Chassis) tractor chassis. Component tractors are PROHIBITED!
4. Only mechanical activated clutches permitted.
5. Must use an OEM Style Cast Head and Block. No Billet or Aluminum. OEM Style stock head for the series of
engines used are required, maximum of two (2) valves per cylinder. OPTION: A Re- Cast Head/block may be used
but must remain within 1⁄2” of factory dimension specifications for the OEM head. No Billet or Aluminum recast
heads/blocks.
6. O.E.M. block cannot be altered in any way externally, except for normal repair or for mounting fuel injection
pumps. Internal webbing and water jacket to remain intact with provisions to re-bore the motor block. All
alterations in this rule concerning stock block or O.E.M. must be approved by Appalachian Outlaws Pulling Series.
7. Any tractor using a deck plate must be cube checked prior to the 1st day that the tractor is entered into
competition by a certified official and at the full cost to the owner of the tractor. This may not be done on the
same calendar day as competition!!
8. All Limited Pro Stock/Super Farm Tractors must have a shield between driver and tire to consist of a solid
barrier between driver and any part of the rear tires, sufficient to support the weight of the driver. The barrier
must be a minimum of 6” inches from the vertical out over the tire configured as the tire.
9. A deflection shield between driver and engine from top of hood to top of torque or transmission housing or
clutch housing is required. Deflection shield must go from side shield to side shield. This also provides a flash
fire barrier.
10. Diesel is the only approved fuel – use of ALCOHOL is strictly prohibited in either the fuel or the water injection.
Each tractor is subject to both fuel and water sampling at each event. Failure to submit to immediate testing will
result in disqualification from that event and barring from competition for the remainder of the season.
11. No sigma pumps OR MW pumps are permitted. Fuel injection pumps may not be girdled.
12. Only Three (3) Mechanical Drops per season per tractor will be allowed.
LIMITED PRO STOCK TRACTORS
1. Limited Pro Stock Tractors will compete at a maximum weight of 8,700 lbs.
2. 540 cubic inch maximum
3. Tractors are allowed a single (1) turbocharger with any manifold modifications necessary to mount the
turbo charger.
4. Limited Pro Stock turbocharger, G-Trim Max on Exhaust Side of Turbo (Limited to 4.5” Outlet I.D.”)
5. Manifold pressure may be a single stage only.
6. ‘A’ PUMP: Only one plunger per cylinder and one injector per cylinder are permitted. All ‘A’ pumps must
be derived from the German Bosch design. Pumps must maintain stock dimensions.
7. Legality of the injector pump by officials is based on the visual inspection of the outside housing and not
the inner workings of the injector pump.
8. No inner/after coolers allowed. No CO2 or any other means of cooling the air in the piping or manifold. No
ice filled or ice cooled devices onboard tractors of any kind. All engine air must enter the inlet of the turbo
at ambient air temp & humidity. Inlet air may not be drawn through or across any type of cooling device.
SUPER FARM TRACTORS
1. Super Farm Tractors will compete at a maximum weight of 9,500 lbs.
2. 640 cubic inch maximum
3. P-pump with 1 plunger per cylinder. Pumps must maintain stock dimensions.
4. Intake will be limited to a Maximum O.D. Size of 3.75” measured at the manifold attachment point with
one inlet pipe only.
5. Turbo housing may not be altered to accommodate a smaller foot or base. Such as a T18 with a smaller
foot or base welded to it.
6. Exhaust housing bolt pattern shall be no larger than 2.75 x 3.5 inches.
7. INTAKE –
a) Intake housing to be no larger than 3” at the face of the wheel.
b) Compressor wheel tips must protrude into 3” bore.
c) Map width enhancement of .200” Maximum is permitted. Must be in OEM location
d) All Air flow must go through the turbo intake and map ring, no other air flow will be permitted IE.
Drilled holes around the turbo intake
8. EXHAUST –
a) Turbine wheel to be no less than 2.90” in diameter at intersection of turbine wheel face and tip
diameter.
b) Turbine housing to be no larger than 3” at the intersection of turbine wheel face and tip diameter.
c) All turbine wheel blades protrude 1/8” into 3” bore. All air must exit through the 3” opening.
d) Exhaust housing will be measured at the intersection of turbine wheel face and tip diameter.
9. No waste gates permitted.
1 0. No variable geometric turbochargers permitted.*** Tech Officials reserve the right to refuse any turbo charger that is in question based on the above specifications. **
1. All tractors will be required to have a 47.1 SFI Spec. roll-over protection.
2. All Limited Pro Stock/Super Farm Tractors are allowed a maximum tire size of 24.5x32.
3. All Limited Pro Stock/Super Farm tractors must utilize an OEM (Ag Chassis) tractor chassis. Component tractors are PROHIBITED!
4. Only mechanical activated clutches permitted.
5. Must use an OEM Style Cast Head and Block. No Billet or Aluminum. OEM Style stock head for the series of
engines used are required, maximum of two (2) valves per cylinder. OPTION: A Re- Cast Head/block may be used
but must remain within 1⁄2” of factory dimension specifications for the OEM head. No Billet or Aluminum recast
heads/blocks.
6. O.E.M. block cannot be altered in any way externally, except for normal repair or for mounting fuel injection
pumps. Internal webbing and water jacket to remain intact with provisions to re-bore the motor block. All
alterations in this rule concerning stock block or O.E.M. must be approved by Appalachian Outlaws Pulling Series.
7. Any tractor using a deck plate must be cube checked prior to the 1st day that the tractor is entered into
competition by a certified official and at the full cost to the owner of the tractor. This may not be done on the
same calendar day as competition!!
8. All Limited Pro Stock/Super Farm Tractors must have a shield between driver and tire to consist of a solid
barrier between driver and any part of the rear tires, sufficient to support the weight of the driver. The barrier
must be a minimum of 6” inches from the vertical out over the tire configured as the tire.
9. A deflection shield between driver and engine from top of hood to top of torque or transmission housing or
clutch housing is required. Deflection shield must go from side shield to side shield. This also provides a flash
fire barrier.
10. Diesel is the only approved fuel – use of ALCOHOL is strictly prohibited in either the fuel or the water injection.
Each tractor is subject to both fuel and water sampling at each event. Failure to submit to immediate testing will
result in disqualification from that event and barring from competition for the remainder of the season.
11. No sigma pumps OR MW pumps are permitted. Fuel injection pumps may not be girdled.
12. Only Three (3) Mechanical Drops per season per tractor will be allowed.
LIMITED PRO STOCK TRACTORS
1. Limited Pro Stock Tractors will compete at a maximum weight of 8,700 lbs.
2. 540 cubic inch maximum
3. Tractors are allowed a single (1) turbocharger with any manifold modifications necessary to mount the
turbo charger.
4. Limited Pro Stock turbocharger, G-Trim Max on Exhaust Side of Turbo (Limited to 4.5” Outlet I.D.”)
5. Manifold pressure may be a single stage only.
6. ‘A’ PUMP: Only one plunger per cylinder and one injector per cylinder are permitted. All ‘A’ pumps must
be derived from the German Bosch design. Pumps must maintain stock dimensions.
7. Legality of the injector pump by officials is based on the visual inspection of the outside housing and not
the inner workings of the injector pump.
8. No inner/after coolers allowed. No CO2 or any other means of cooling the air in the piping or manifold. No
ice filled or ice cooled devices onboard tractors of any kind. All engine air must enter the inlet of the turbo
at ambient air temp & humidity. Inlet air may not be drawn through or across any type of cooling device.
SUPER FARM TRACTORS
1. Super Farm Tractors will compete at a maximum weight of 9,500 lbs.
2. 640 cubic inch maximum
3. P-pump with 1 plunger per cylinder. Pumps must maintain stock dimensions.
4. Intake will be limited to a Maximum O.D. Size of 3.75” measured at the manifold attachment point with
one inlet pipe only.
5. Turbo housing may not be altered to accommodate a smaller foot or base. Such as a T18 with a smaller
foot or base welded to it.
6. Exhaust housing bolt pattern shall be no larger than 2.75 x 3.5 inches.
7. INTAKE –
a) Intake housing to be no larger than 3” at the face of the wheel.
b) Compressor wheel tips must protrude into 3” bore.
c) Map width enhancement of .200” Maximum is permitted. Must be in OEM location
d) All Air flow must go through the turbo intake and map ring, no other air flow will be permitted IE.
Drilled holes around the turbo intake
8. EXHAUST –
a) Turbine wheel to be no less than 2.90” in diameter at intersection of turbine wheel face and tip
diameter.
b) Turbine housing to be no larger than 3” at the intersection of turbine wheel face and tip diameter.
c) All turbine wheel blades protrude 1/8” into 3” bore. All air must exit through the 3” opening.
d) Exhaust housing will be measured at the intersection of turbine wheel face and tip diameter.
9. No waste gates permitted.
1 0. No variable geometric turbochargers permitted.*** Tech Officials reserve the right to refuse any turbo charger that is in question based on the above specifications. **