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8700 Light Pro / 9200 4.1 Limited Pro Tractor Rules

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Light Pro Rules

 

***Light Pro Class will follow PPL Turbo Safety Rule – (see Turbo Safety Page)

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Weight: 8700 lbs

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  1. All OEM chassis rules (No component chassis allowed), including shielding, safety, & SFI requirements, apply to this class plus the following rules.

  2. Maximum tire size not to exceed 24.5x32.

  3. Maximum weight 8700 lbs.

  4. No engine larger than 540 cid. OEM replacement blocks permitted. Must have PPL approval.

  5. Cast or manufactured cylinder head will be accepted. Cylinder head must retain OEM length and width for the engine application. Valves must remain OEM angle for engine application. No overhead cams allowed. Maximum 2 valves per cylinder.

  6. Diesel fuel only. P-7100 injection pump is the largest allowed. (2-5/8”W X 9-9/16”L X 8-3/16” H main pump body) Only one plunger per cylinder allowed.

  7. Turbo: ALL exhaust will exit through a 4.5” opening in the exhaust housing. Exhaust wheel must protrude 1/8th inch inside bore. Maximum inlet 5”.

  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 tractor 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.

  9. All engine blocks MUST remain in original location as intended by the manufacturer. Sheet metal to be stock length and location must be stock appearing

  10. Tractors MUST have grill and hood in place as intended by manufacturer.

  11. Tractors MUST have stock block, agricultural type block, OEM replacement block. No automotive blocks permitted. Maximum of 8 cylinders permitted. Approved recasted/ after-market block suppliers; (Hypermax, D&R, E-burg Components, Lemke, Chaos Fabrication).

  12. Maximum wheelbase is 114” and maximum length is 13’ 28 from the center of the rear axle to forward most part of the tractor.

  13.  

    • All turbocharged engines on tractors will have one cable totally surrounding the engine block and head. The cable will consist of 3/8” diameter and located between the first and second cylinders. Cable must pass through the manifold areas. Cable will have four (4) to six (6) inches of slack. There will be a minimum of four (4) clamps at all splices. Maximum of 2 valves per cylinder. A second cable minimum of 3/8’’ diameter position on front half of engine. Cable will have four (4) to six (6) inches of slack. There will be a minimum of four (4) clamps at all splices.                                                        OR

    • All inline turbocharged engines are REQUIRED to have a cable placed between the first and second cylinder through exhaust manifold port area. Cable must be a minimum of one (1) 3/8 manufactured pendant line with a rating of at least 3000 lb or more with a tag from the manufacture that indicated the rate load capacity with swaged sockets.

  14. A deflection shield between driver and engine from top of hood and top of transmission housing or clutch housing is required. Deflection shield will go from side shield to side shield. This will help provide a barrier during a flash fire.

  15. All tractor engines are REQUIRED to shield all rotating mass mounted on the front of the crankshaft. Shield to be frame rail to frame rail by a minimum .125 aluminium or steel fastened to the frame on each side by two evenly spaced bolts. (3/8-inch Grade 5 minimum.)

  16. All tractors are REQUIRED to have an approved bell housing blanket that meets the following specifications: 20 ply ballistic nylon or 20 ply Kevlar style 713 betting construction. At least seventeen (17) inches wide and long enough around the bell housing with six (6) inches of overlap, secured with a two (2) inch wide nylon web straps, with a steel “d” ring on one end and sewn the length of the blanket, except overlap area and long enough to pass back through the “d” ring and to be tied in a saddle cinch and with four (4) two inch nylon webs retaining strips, each at the front and back of blanket.

  17. All tractors will run a safety tie bar system or a one piece frame rail secured to the rear axle housing:

    • Tie bars will be mounted with at least four (4) axle housing bolts.

    • Tie bars will extend forward of bell housing area and 29 be fastened to side of the block with a minimum of two (2) 5/8 bolts.

    • Tie bars will be of sufficient strength to support weight of the tractor with the  bolts used to split tractor removed.

    • All safety blankets will be mounted inside safety tie bar system.

  18. On cast iron OEM chassis a 1/2” steel spacer plate is permitted for clutch clearance.

  19. ONLY mechanical activated clutches permitted.

  20. All PPL General Rules apply.

 

4.1 Limited Pro Rules

 

***4.1 Limited Pro Class will follow PPL Turbo Safety Rule – (see Turbo Safety Page)

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Maximum weight permitted 9200 lb

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  1. Maximum cubic inch limit is 640. Maximum of 8 cylinders permitted. OEM aftermarket replacement blocks permitted. Must have had PPL approval.

  2. The only acceptable fuel is diesel.

  3. The turbocharger is smooth-faced intake housing, limited to a 4.1” inlet, (no map ring) with all air entering through the 4.1” opening. Intake wheel must protrude 1/8th inch inside of opening.

  4. ALL exhaust will exit through a 4.5” opening in the exhaust housing. Exhaust wheel must protrude 1/8th inch inside of opening.

  5. NO waste gates permitted.

  6. NO air-cooling devices in any manner permitted.

  7. Maximum size injection pump is a P-7100 series pump allowed (2-5/8”W X 9-9/16” L X 8-3/16”H main pump body) only one plunger per cylinder. No billet housings.

  8. Component chassis are NOT acceptable.

  9. NO overhead cams permitted. Outside of cylinder head must keep OEM length and width dimensions. Valves must retain OEM angle. Must retain a single manifold to the side of cylinder head. Manifold mounting surface must be 90 degrees to cylinder head/block mounting surface. Maximum of 2 valves per cylinder and OEM valve angle and configuration must be retained.

  10. Aftermarket manifolds are allowed and MUST bolt in original port bolt pattern.

  11. Deck plates are allowed with a maximum thickness of 311.00”.

  12. NO overhead-cams permitted.

  13. Maximum tire size is 24.5” X 32”.

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