Classes

WEIGHT: 6200#

TIRES: Maximum 18.4-38

CYLINDER BLOCK OR CRANKCASE: Naturally aspirated engines only. Small blocks must have been originally manufactured with less than 370 CID and may not exceed 460 CID. Big Blocks may not exceed 810 CID.

Approved chassis and small block engine combinations:
AC 190 with 301, Cockshutt 570 with 339, Ford 6000 with 300, International 460/560 with 301, 310, or 360, MF 1100 with 354, MH 203 with 330, Oliver 77/88 with 310 or 320.

Approved chassis and big block engine combinations:
AC 190 with 426, Case 900/930 with 504, Cockshutt 570 with 478, Ford 6000 with 401, International 460/560 with 466 or RD501, John Deere 4010 with 466, MF 95/97 with 800, MM GVI/GVD with 800, Oliver 77/88 with 478.

Approved sheet metal upgrades for small and big block chassis/engine combinations as follows: AC D-21, Case 1070, Cockshutt 1800, 2050, Ford 8000, IH 656, 706, 756, JD 4020, MM G1000, Oliver 1600, 1800, 2050

(Combinations not listed above subject to approval.)

HEADS: Cast iron heads only and must be from same engine manufacturer. No over head cams allowed.

FUEL SYSTEM: Gasoline, Ethanol, Methanol or Diesel. Non-nitromethane and non-polypropylene oxide based oxygen additives are acceptable. Fuel will be tested following these specs: 755 s.g. @ 60F for gasoline, ‹0.800 s.g. @ 68F for methanol and ‹0.820 s.g. @ 68F for ethanol. Small blocks may use: 1) one single bbl updraft carburetor with an original manufactured throttle bore not more than 3.1875″ and modified bore of not more than 3.3125″ 2) a single non-predator style down draft 4 bbl carburetor; 3) up to three 500 cfm down draft 2 bbl carburetors; or 4) fuel injection through a throttle body air valve not more than 4.00″ in diameter. Big Blocks may use one single bbl updraft carburetor with an original manufactured throttle bore not more than 3.1875″ and modified bore of not more than 3.3125″. All must use intake manifold with common plenum.

RPM’S: Open

HITCH: Hitch must not exceed 20″ in height or be less than 18″ from center of axle to hooking point. No part of draw bar may extend rearward beyond point of hook. Hitch must be stationary in all directions. No clevis. Hitch must have opening 3″ wide by 3.75″ inches long and must be at least 1″ thick.

HOOD, GRILL, FRAME, TRANSMISSION, REAR END, AXLE: Must be for that make and must maintain stock appearance. Front ends may be homemade with a maximum center of front axle not to exceed 12″ in front of grill. Frames may be tubular but must be covered with sheet metal or aluminum.

TOTAL LENGTH OF TRACTOR: Maximum length 12′ from center of rear axle to the furthest point forward, including weights.

SAFETY EQUIPMENT: Helmet, Fire Suit, Wheelie bars, Roll cages, front skid plates, kill switches, fire extinguishers, fenders, side shields, SFI flywheels and pressure plates – no cast iron, scatter blanket or steel shields, no steel fans, all electric fuel pumps must be wired to the kill switch. Wide front axles only.

The Tri State Tractor Pullers will interpret all rules. The committee will rule on any unforeseen problems or oversight.

All COTPA general rules apply.

Please contact Ed Gortner or Bill Downing for comprehensive rules and specifications regarding this class.

Hot Rod Tractors
Small Block 2018 Rules

WEIGHT: 6000 #

TIRES: 18.4 x 38 maximum

AGE OF DRIVER: 16 years or older, under 18 years must have parental consent.

AGE OF TRACTOR: 1972 and older, no home- made tractors

FUEL: No pressurized fuels, no nitrous oxide, no nitrogen methanol, and no propylene oxide. Racecar gasoline, Alcohol, and oxygenated fuels may be used.

DRAW BAR: Drawbars must not exceed 20 inches in height or less than 18 inches from center of axle to hooking point. No part of draw bar may extend rearward beyond point of hook. No part of drawbar is to be attached to any point higher than the center of rear axle. Drawbars must be stationary in all directions. No clevis, absolutely no turnbuckles.

ENGINE RULE: Must be 410 cubic inches or smaller, 6 cubic inches may be added to engines that require a fresh re-bore, no engine may be larger than 416 +0 cubic inches, Must be an industry standard small block, no big blocks. Must be a cast iron block, cast iron heads, maximum eight cylinders, two valves, one spark plug per cylinder, Camshaft in block. The (Pump) is a Tech tool only; engines under protest may be subject to a tear down. All Pullers have the tear down option. All engines may be subject to a tear down by the COTPA Tech Inspector and or COTPA Officials as they deem necessary. The (Engine Rule) will be in effect through the pulling year 2020. Center of axle to rear of block (where bell housing bolts on) is to be a maximum of 72 inches

MANIFOLD, CARBURETOR: One four barrel naturally aspirated carburetor, 4150 base, 750 CFM. No predators, no dominators, no aerosol carburetors. No fuel injection, no throttle based injection. Carburetor will be inspected with a No Go gauge (1.400 top and 1.700 bottom. All intake manifolds can be low-rise type. No tunnel-ram, no sheet metal/ aluminum intakes, no casted sheet metal type, no welded manifolds allowed. Headers must exit in an upward direction.

IGNITION: All ignitions must use a MSD model 6AL or 7AL-2 system with an RPM limiting chip. Tech inspections performed by using MSD model 89952 RPM Module/Chip Tester.

Engine RPM-
1) Tractor engines will have an 8000 maximum RPM limit.
2) Tractors must use an MSD model 6AL or 7AL-2 system with chip limiter.
3) Boxes must be easily accessible for officials to tech.
4) Boxes may not be tampered/ modified. Rivets must be original. If you drill a rivet out, you will have to buy a new box. If factory sealant/ sticker is broken, a new box is mandatory.
5) Only the wiring per MSDs wiring diagram is allowed, and must be plainly visible. No other wires may be attached to any of the MSD factory wires other than as specified per MSDs wiring diagram.

HOOD, GRILL, TRANSMISSION, REAR END, AXLE: All Sheet metal to include Hood, Grill, Fuel Tank, (if part of sheet metal) Side metal, and Screens must be for that make and model and must maintain original dimensions in all directions (width, height and depth) but could be moved forward a maximum of 8 inches as a complete unit/assembly. Sheet metal must be 1972 or older. Some sheet metal modifications are allowed contingent upon Hot Rod committee approval. Agricultural rear ends must also be 1972 or older. Crossing Sheet Metal with Different Manufacturer is permissible. Bell housing and transmission may be removed if they were designed to be unbolted from the rear end at the factory. Front ends may be homemade, maximum allowable wheelbase of 100 inches from center of rear axle to center of front axle or manufacturer stock length if greater than 100 inches.

TOTAL LENGTH OF TRACTOR: Tractors maximum allowable length is 11 inches from center of rear axle to the furthest point forward, including weights.

SAFETY EQUIPMENT: Helmet and fire suit, wheelie bars, ski bars, kill switches, fire extinguishers, fenders, SFI damper, SFI flywheels and pressure plates, SFI bell housings, engine side shields must be incorporated. Drive shaft from bell housing to transmission must be shielded. Roll cages must be capable of supporting tractor and driver. No steel fans. All tractors must have wide front axles with a minimum of 32 inches between inside of tires. All electric fuel pumps must be wired to the kill switch. Neutral safety start switch is required. NO factory cast iron tub frames allowed. COTPA General Rules apply.

Technical Inspections: All Tractors must be pumped, pans sealed, and go through a complete Tech inspection prior to the summer season. There will also be random checks during the season.

Pre season inspections can be done at the Dekalb Pull at Eaton. ALL RULES WILL BE INTERPRETED BY THE Hot Rod COMMITTEE. ANY UNFORESEEN PROBLEMS OR OVERSIGHTS WILL BE RULED ON BY THE Hot Rod COMMITTEE. Hot Rod official and/or tech person has the right to check any tractor at any sanctioned event. ALL COTPA GENERAL RULES APPLY INCLUDING PROTEST POLICY Hot Rod Committee Chairperson: Nathan McCune 1-740-624-8097 Hot Rod Committee Members: Todd Cooperider, Larry Mouser, Barney Taylor.
Hot Rod technical committee: Jim Tiege Head Tech, Barney Taylor, Josh VanHorn

The Light Pro Stock Class is a black smoke, diesel tractor class. This class derived from our Classic Super Stock class. The main modifications, from the Classic Super Stocks were increased cubic inches and larger turbo size. The average horsepower for this class is approximately 1200 horsepower. This is a diesel fuel only class. The turbo charger is a 3.15 compressor wheel with unlimited turbo wheel outlet. Within our current class, the cubic inches varies between 504 to 540 with the maximum cubes allowed being 540. Maximum cut tire size of 24.5 x 32 push the ground speeds between 26 and 28 MPH. The cylinder block must be from the same (tractor) manufacturer and bolt into place without modifications. Hood, grill, transmission, frame, rear end and axle must maintain stock appearance. Maximum wheel base is 114″ measured center axle to center axle. This diverse group of pullers has all the main tractor manufacturers in this class: John Deere, International, Ford, Allis Chalmers. This ground-eating, black smoke tractor class is a very crowd-pleasing pulling class!

WEIGHT: 8500#

TIRES: Maximum 24.5×32

AGE OF DRIVER: 18 years or older

FUEL: Diesel Fuel only, water injection ok, no combustible fuels in water

CYLINDER BLOCK OR CRANK CASE: Must be from same manufacturer and must bolt in stock location without modification. All engines must be 540 cubic inches or smaller. All engine upgrades must be approved by the committee.

HEADS: Cast iron heads only. Must be from same manufacturer. No over head cams allowed.

INJECTOR PUMPS, ONE ONLY: P – Pump maximum, one plunger per cylinder. No computerized fuel systems allowed.

TURBO: One single stage turbocharger allowed. Compressor cover bore to be no larger than 3.2″ at the face of the wheel. Compressor wheel must protrude at least 1/8″ into the 3.2″ bore. Map Width Enhancement is allowed. The maximum MWE slot width is 0.200″. MWE slot will be measured where the compressor wheel is within the 3.2″ bore. The turbine bore must measure no larger than 3.70″ diameter. All the blades must protrude into this bore. No waste gates will be permitted. No Variable Geometry Turbochargers will be permitted COTPA.

MANIFOLDS: Manifolds must be from same manufacturer and must bolt onto head without modification, alteration for turbo mounting allowed. Combine manifolds OK. No intercoolers.

RPM’S: Open

DRAW BAR: Drawbars must not exceed 20″ in height or less than 18″ from center of axle to hooking point. No part of draw bar may extend rearward beyond point of hook. Drawbars must be stationary in all directions. No clevis.

HOOD, GRILL, FRAME, TRANSMISSION, REAR END, AXLE: Must be for that make and model and must maintain stock appearance. Front ends may be homemade with a maximum of 114” wheelbase. Frames may be homemade but must maintain stock appearance. Upgrades on sheet metal must be approved by the committee.

TOTAL LENGTH OF TRACTOR: Maximum length 13′ from center of rear axle to the furthest point forward, including weights.

SAFETY EQUIPMENT: Helmet, Fire Suit, Wheelie bars, Roll cages, kill switches, fire extinguishers, fenders, side shields, SFI flywheels and pressure plates, scatter blanket or steel shields, no steel fans, all electric fuel pumps must be wired to the kill switch. Wide front axles. No cast iron engine frames. (Ladder bars are recommended).

THE COMMITTEE WILL INTERPRET ALL RULES. ANY UNFORSEEN PROBLEMS OR OVERSIGHTS WILL BE RULED ON BY THE COMMITTEE. ALL COATPA GENERAL RULES APPLY.

Address Questions to:
Andy Hurst 937-790-0644
Mike Butcher 937-645-7657

WEIGHT: 7700# If a competitor moves more than 200 lb of weight forward, that vehicle’s drawbar may be remeasured and vehicle reweighed at the discretion of the official.

AGE OF TRACTOR: 1970 and older but including total run of that model.

AGE OF DRIVER: 16 years or older. Under 18 must have parent or guardian consent form signed.

FUEL: Diesel fuel only, no pressurized fuel tanks.

WATER INJECTION: Water must pass propylene oxide spot test.

TIRES: 18.4 x 38 maximum radials allowed.

CYLINDER BLOCK AND CRANK CASE: Must be from the same manufacturer. All up graded Blocks must be approved by the committee. Examples: IH 68 series 466, JD 40 series 8.1L, JD 5010 & 5020 must run 531 block, AC 516, Case 504, Ford 478, MM 504, Oliver 478 and others to be approved by the committee ALL ENGINES MUST BE 531 CUBIC INCHES OR SMALLER . All tractors must have a cubic inch, turbo, and Safety inspection before they are permitted to compete.

HEADS: Must be from same manufacturer and must bolt in stock location without modification. No over head cams allowed.

DRAW BAR: Draw bars must not exceed 20 inches in height or less than 18 inches from center of axle to hooking point. No part of draw bar may extend rearward beyond point of hook. Draw bars must be stationary in all directions. No clevis. Hitches must have at least a 3″x3¾” hole with minimum of one inch of material around the outside. A drawbar that has provisions to be made shorter than legal length is not acceptable as a legal drawbar.

HOOD, GRILL, FRAME, TRANSMISSION, REAR END, AXLE: Must be for that make and model and must maintain stock appearance. Front ends may be homemade. Maximum wheelbase to be no more than 114″. Frames may be altered to except upgraded blocks. No cast iron engine frames.

TOTAL LENGTH OF TRACTOR: Maximum length 13′ from center of rear axle to the furthest point forward, including weights. Excludes tow hook.

SAFETY EQUIPMENT: Full face helmet, Fire Suit, Wheelie bars, Roll cages, kill switches, fire extinguishers, fenders, side shields, SFI flywheels and pressure plates, scatter blanket or steel shields, no steel fans, all electric fuel pumps must be wired to the kill switch. Wide front axles. No cast iron engine frames. (ladder bars are recommended). Must have 3/8 cable around block and head. 2 Throttle return springs. 2 3/8 grade 5 cross bolts in exhaust. 3 way dump valve. Driver must be in seat at all times while engine is running. No excessive loss of liquid onto track by a vehicle while hooked to sled unless caused by breakage. Excessive is defined as any steady or intermittent stream discharged onto the track or a spot equivalent to more than 8″ in diameter.

INJECTOR PUMPS: P 3000 series Pump maximum, one plunger per cylinder. No computerized fuel systems allowed.

MANIFOLDS: No inner coolers, no after coolers. No intercooler style manifolds. OEM stock intake and exhaust manifolds for that series engine, alteration for turbo mounting allowed.

TURBO, ONE ONLY: One single stage turbo allowed. Turbo must not extend through hood.
A. Exhaust bolt pattern no larger than 2.750 in x 3. 250 in .
B. No altering of a housing to accommodate a smaller base; e.g. T-18A95 with a smaller base welded to it. No external altering of housings. Compressor housing must be 3LM style with 2” OD outlet.
C. A compressor measurement to be measured at the face of the wheel a maximum of 2.7 in. The wheel may be no larger than this measurement at the inlet. Compressor housing inlet bore to be no more than 2.75″ maximum. Tips of wheel must protrude into opening at least 1/8”. No slots or grooves. A maximum of 2 in. OD at the outlet.
D. An exhaust measurement to be measured at the face of the wheel outlet of a maximum of 3 in. The wheel may be no larger than this measurement at the outlet. Exhaust housing bore to be no more than 3.06″ maximum.

ALL RULES WILL BE INTERPRETED BY THE DIV 5 COMMITTEE. ANY UNFORESEEN PROBLEMS OR OVERSIGHTS WILL BE RULED ON BY THE COMMITTEE.
(The Division 5 official and/or tech person has the right to check any tractor at any time at any place.)

ALL COATPA GENERAL RULES APPLY
Chairman: Matt Spillman 330-268-4301