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Rule changes/additions from the December 11, 2016 ITPA Board of Directors meeting:

General
Page 19 under SPECIFICATIONS FOR DIESEL FUEL (change to read):  The ITPA will evaluate diesel fuel using the dielectirc constant value.  That value shall be determined by the ITPA fuel check meter only.  The ITPA fuel check meter shall use Cyclohexame to establish the zero reference point for determining all diesel fuel dielectric constant values.  Diesel fuel to be used in ITPA competition shall have a dielectric value of no greater than 100 nor a value of no less than 10.

Change the first part of rule #3 on page #7 under GENERAL RULES/DRAWBARS to read:  Drawbar must be rigid, with no movement allowed.  Drawbars must have the pivot pin on the same plane as the hitch point and parallel to the ground within 10 degrees or less of drawbar angle in either direction when measured at maximum drawbar height per class.

Page 30 rule #12 and page 49 rule #32:  Cable surrounding turbochargerd engines must have 4 clamps (not 2) at the splice.

 

Classic
Page 40 rule #3 add:  Classic – Tractor must have OEM block and crankcase (MM – updated OEM crankcase allowed).Mini Rod
50 lbs. weight added to the 1900# Mini Rod class weight.9500# Pro Farm
Rules for the 9500# Pro Farm class will remain the same in 2017 as in 2016 and delete the last sentence in rule #5 page 44 that reads:  Projected turbocharger limit for the 2017 pulling season to be a 3.0 inch smooth bore turbocharger.11,000# Pro Farm
Turbo – One 3.00 inch turbocharger with .250 inch width map groove OR one 3.6 inch smooth bore turbocharger.  Delete the last sentence in rule #5 on page 43 which reads:  Projected turbocharger limit for the 2017 pulling season to be a 3.6 inch smooth bore turbocharger.5800# Modified
Change part of rule #3 on page 27 under MODIFIED TRACTORS to read:  OR one (1) naturally aspirated automotive engine, cast or aluminum OR two (2) naturally aspirated automotive engines, cast or aluminum with a maximum of 1300 total cubic inches.

On page 27 in rule #3 – change supercharger overdrive from a maximum of 60% to a maximum of 65%.

8000# Pro-Street Diesel Trucks
The 8000# Pro-Street Diesel Trucks were added as a sanctioned ITPA point and State Fair class at $1600 purse and $20 entry fee in 2017.  Complete competition rules will determined later.

Rule changes/additions from the November 6, 2016 ITPA Board of Directors meeting:
General
Add rule #23 under Operation of Contest to read:  Engines may be started and warmed up anytime up to 15 minutes before scheduled pre show ceremonies or starting time of the event.  After event has started, engines may be started anytime.

Add rule #16 on page 54 under Disqualification to read:  Competitors found dumping liquid (water, ice, fuel, etc.) or creating a wet spot larger than 12″ diameter in the staging or pit area; my be disqualified at that event.

Pro Stock
Change the first part of rule #6 on page 32 under Pro Stock Tractors to read:  Legal engine will include any engine available in a 2WD ag tractor.

Rule changes/additions from the March 6, 2016 ITPA Board of Directors meeting:

General

Add to the new protest rule:  Protestee must provide tools to disassemble engine at time of protest.  Failure to provide tools will be treated the same as refusing protest.

9500# & 11,000# Pro Farm

Project the turbocharger limits for the 2017 pulling season in the 9500# Pro Farm to be a 3.0 inch smooth bore turbocharger and in the 11,000# Pro Farm to be a 3.6 inch smooth bore turbocharger.

7800# Light Pro Farm

In 2016, to offer as exhibition the 7800# Light Pro Farm class with a minimum per day membership required.

Specific rules for the class

1.  Engine, sheet metal, manifolds, transmission and rear end must match brand.  Manufacturer replacement engine allowed.  Sheet metal amd engine must be stock appearing.
2.  No aftermarket heads or blocks.
3.  Engine/RPM
     maximum 430 cubic inch / maximum 3000 rpms
     2.5 inch turbocharger (smooth bore) with OEM manifolds or manufacturer replacements.
     Fuel:  diesel fuel only
     Maximum P7100 injection pump allowed, maximum 13 mm plunger; single plunger/injector/cylinder.  No electronic fuel injection allowed.
      No intercoolers, no air-to-air after-coolers allowed, no ice box, no artificial cooling agents allowed in air intake system or fuel system.
     No external modifications of block allowed, other than for injection pump mounting.
     No spacer plate between manifolds and head.
     No spacer plate between block and head.
     Electric fans allowed/recommended, no engine driven cooling fans.
4.  Weld on hub plates or wedge style dual hubs required.  No U-bolt dual hubs allowed.
5.  Weight  7800 lbs. maximum.  Must have 200# moveable weight.
6.  No shifting under green flag.
7.  Roll cage (SFI 47.1, 3 bar roll cage) and 5 point harness required.
8.  Tires and wheels:
     Aluminum rims allowed.
     Radials allowed.
     Cut tires allowed.
     Any rim width.
     18.4 – 38 bias or radial
     480/70R38
     460/85R38
     480/80R38
     20.8 – 34 bias or radial
     520/85R34
     540/65R34
9.  Aftermarket transmissions allowed but must be contained/hidden inside original transmission housing.  Mechanical splitters in place of hydro-shift in front of transmission allowed.
10.  Fuel tanks are not allowed above the height of the engine exhaust manifold.  All fuel tanks vents are required to be vented to within 10 inches of the ground.
11.  Exhaust must exit vertically and above the height of the tractor operator’s head.  No “flapper” caps, no curved pipes.
12.  Safety kill switch must operate air shut off and shut off electric fuel pumps.
13.  Must have 2 bolts (cross-ways) in exhaust pipe.
14.  Engines must have a cable wrapped around the engine between cylinders 1 & 2, 3/8″ steel cable with 2 clamps & approximately 4″ of slack.
15.  Maximum 114″ wheel base.  13 feet maximum distance between center of rear axle and forward most portion of tractor (front weight bracket and weights).  Front recovery loop not included in 13′.
16.  Seat must have side rails and back rest.
17.  Drawbar; height 20″, length 18″.
18.  Safety tie bars required.  Roll-over/stabilizer bars required.  Front skid plates (skis) required.
19.  3-way fuel dump valve required.
20.  SFI approved clutches and flywheels are required.  Notarized statement required.
21.  SFI scatter blanket around clutch housing (SFI 4.2).  SFI clutch housing allowed in place of blanket on those tractors that have an independent clutch housing.
22.  Tractor must have fenders on rear wheels capable of supporting driver weight and provide protection to prevent drivers leg/foot from making contact with rear wheels.
23.  Cast tub (Oliver, White, etc.) may be replaced with ladder rails but must be covered with a panel.  Engine must remain in stock location with the use of ladder rails or tube chassis.
24.  Wide fronts only, front wheels must “track” in rear wheels.
25.  The ITPA Board must approve any non-factory front end.
26.  Full fire suit (jacket, pants, shoes & gloves) and helmet & head sock required.
27.  Fire extinguisher required.
28.  Engine side shield required.
29.  RPM pick-up required.

30.  All other ITPA safety rules will be adhered to.

 Rule changes from the January 3, 2016 ITPA Board of Directors meeting:

9500# & 11,000# Pro Farm

Add to rule #5 on page 43 under 9500# Pro Farm and rule #5 on page 42 under 11,000# Pro Farm the following rule clarification:  Map width enhancement groove must be inside neck area where intake cover is measured.  –  HAS BEEN RESCINDED

 

Rule changes from the December 13, 2015 ITPA Board of Directors meeting:

Antique

Page 39 rule #3, change the first sentence to read:  Antique:  Tractor must have OEM external dimensions cast iron block and crankcase (updated OEM crankcase allowed).

Page 40 rule #12, change the first sentence to read:  Tractors allowed to upgrade from mag to OEM distributor.  Delete:  Classic class only.  Programmable/non-programmable MSD (remainder of the rule stays the same)

Page 39 rule #3, remove the word Classic – at the beginning of the last sentence..  (Now Antique and classic have the same head rule.)

Super Stock

Light Super Stock weights are as follows:
6200# – component chassis vehicles
6400# – ag chassis vehicles

and add: 200 lbs. moveable weight required

Page 28 rule #4, change to read:  Super Stock tractors must have hood and grill in place as intended by the manufacturer.  All engine blocks must remain in original location as intended by manufacturer.  Sheet material to maintain original appearance.

Change rule #5 to read:  Allow upgrading of sheet material subject to the approval of the ITPA Board.

5800# Modified

Turbines weigh 6000 lbs. – Chevy powered vehicles weigh 6100 lbs. – all other vehicles weigh 5800 lbs.

9500# Pro Farm

Rules for the 9500# Pro Farm to remain the same as in 2015.

12,000# Pro Farm

Rules for the 12,000# Pro Farm to remain the same as in 2015 except the weight will be 11,000 lbs.

Pro Stock

Tires on Page 25 – under PRO STOCK AND LIMITED PRO STOCK;  add:  with a maximum 210-inches circumference, when inflated to psi.  Tread width not to exceed 25 inches.

4WD Trucks

The cubic inch rule was deleted.

1050# Super Stock

Page 45 delete rule #24 which reads:  Competition rules to remain the same for three years (2015, 2016 and 2017).

Radial tires will be allowed in the 1050# Super Stock division.

8500# Limited Pro Stock

Page 32 rule #4 under 8500# Limited Pro Stock – change to read:  Engine head must be OEM agricultural-type for that brand engine with valves and injection tip to be OEM location.

Pro Stock Diesel Trucks

Turbocharger – 3.6 inch smooth bore

Tires – 6 DOT street legal tires (35 inch maximum diameter) OR 4 bar tires will be allowed.  Tires must be consistent;  4 bar tires in singles configuration OR 6 DOT tires with singles on front and duals allowed on rear.

9500# Limited Pro Stock

Aftermarket cast iron six cylinder blocks allowed, no aluminum.  Block must accept OEM crankshaft.  Camshaft must be in OEM location.

METHANOL SPECIFICATIONS for all divisions running methanol were refined.  Upper engine lubricating oil and/or fuel fragrances allowed in all classes except in the 1050# Super Stock class where no fuel additives of any kind to be allowed.

Rule changes from the March 8, 2015 ITPA Board of Directors meeting.

Classic division

Change the rule passed in December to read:
Change the last part of rule #12 on page 40 to read:  Classic class only – Programmable MSD box with one coil operated in conjunction with factory distributor allowed.  Replacing points and condenser with electronic ignition allowed.  No ECU with individual coils and crank trigger allowed.  The only allowed inputs to the MSD box from the tractor will be main power supply, ignition/run switch and the signal from the distributor.

Kill switch location was changed to:

Tractors – rear center of the vehicle (maximum of 6 inches off center in any direction), 40 inches above point of hook.

Trucks (except Semis) – rear center of the vehicle (maximum of 6 inches off center in any direction), 16 inches above point of hook.

Rule changes from the January 3, 2015 ITPA Board of Directors meeting:Air operated kill switches are required to use air pressure to keep the switch in the “run” mode.

All MSD 44 magnetos must use a kill switch approved by ITPA (trailer breakaway type switch not allowed).

Rule changes from the December 14, 2014 ITPA Board of Directors meeting:

Change rule #4 on page 18 under FUEL AND FUEL CONTAINERS to read:  Diesel fuel used in ITPA competition shall have a dielectric reading between 35 and 100 which includes any bio fuel.
Add rule #6 under WEIGHING AND DRAWBAR MEASURING PROCEDURES on page 54 to read:
6.  At co-sanctioned events, if scales are available, vehicles will compete at scale weight not ITPA certified weight.
 
 
5800# Modified & 8500# Limited Pro Stock divisions
 
Purse breakdown changed from 8 places to 10 places.
 
Classic division
 
Change the last part of rule #12 on page 40 to read:  Classic class only – MSD type ignition allowed in conjunction with factory distributor.  Replacing points and condenser with electronic ignition allowed.  No brain boxes allowed.  Must be stock appearing.
Add to the end of rule #2 on page 39:  Classic class only – Steel or aluminum replacement fuel tanks are allowed.
 
Change part of rule #3 on page 39 to read:  Classic:  Tractor must have OEM block and crankcase.  Add to the end of rule #3 on page 39 to read:  Classic:  Only OEM heads or OEM cast replacement heads allowed with OEM external dimensions, must retain stock spark plug location.
 
Add to the end of rule #9 on page 40:  Single barrel updraft agricultural carburetor allowed with a maximum throat opening of 1.8″ for 4 and 6 cylinder tractors only.
 
 
8000# Modified
 
Purse breakdown:  1st – $1500, 2nd – $1000, 3rd – $800, 4th – $700, 5th – $600, 6th – $400
 
 
5800# Modified
 
Change the last part (in bold) in rule #3 on page 26 to read:  One (1) stock carbureted or mechanical fuel injected Allison engine with maximum 8.1 supercharger overdrive with 9.5″ wheel, may have aftermarket ignition system or carburetors.
 
 
1900# Mini Rod
 
Add to the end of rule #4 on page 18 under KILL SWITCHES:  All Mini Rod vehicles must use an EMIC or ITPA approved kill switch.    contact Ken Wright  319-631-1573  cost $150
 
Change the last sentence in rule B on page 34 under 1900# MINI ROD TRACTORS to read:  The 1900# Mini Rod class to have the same tech and safety rules as the 2000# Mini Rod class.  Competition rules to remain the same in 2015, 2016 and 2017.
 
 
1050# Super Stock division
 
Change rule #24 on page 46 to read:  Competition rules to remain the same for three years (2015, 2016 and 2017).
 
Change the last part of rule #14 on page 45 to read:  All seats must have a minimum 3″ tall back.
 
Point system for the 1050# Super Stock division will start at 30 and drop one point per place – rain points will remain at 15.
 
 
9500# Limited Pro Stock
Change rule #1 on page 32 under 9500# LIMITED PRO STOCK to read:  Vehicles to weigh a maximum of 9700 lbs. with 200 moveable weight.  Vehicles with billet heads to weigh a maximum of 9500 lbs. with 200 moveable weight.  Change the last part of rule #6 to read:  Billet heads allowed.
 
 
9500# Pro Farm
 
In rule #3 on page 43 under 9500# PRO FARM:  Change 3250 to 3400
 
Delete rule #9 on page 43.
 
 
12,000# Pro Farm
 
In rule #1 on page 41; following ‘transmission housing and differential housing.” add:  Tractors equipped with outboard planetaries, the outboard planetaries may be removed.
 
Delete the last part of rule #2 on page 41 regarding vehicles over 640 cubic inches.

Rule changes from the March 9, 2014 ITPA Board of Directors meeting:Pro Stock – (wording change from the Dec. 15, 2013 meeting)  No billet blocks allowed.  Aftermarket cast iron six cylinder blocks allowed, no aluminum.  Block must accept OEM crankshaft.  Camshaft must be in OEM location.

5800# Modified – Vehicles with an automotive engine with wedge heads that will accept a stock OEM intake manifold bolt pattern, will be allowed to weigh 6000 lbs.

Rule changes from the January 11, 2014 ITPA Board of Directors meeting:

5800# Modified – No twin engine vehicles allowed.  (Board reversed their decision from the December meeting)

9500# Limited Pro Stock – No billet heads allowed.

Rule changes and additions from the Dec. 13 & 15, 2013 ITPA Board of Directors meeting:

All helmets must meet or exceed Snell 2000 rating or must be SFI SPEC 41.2.

Diesel fuel used in ITPA competition shall have a dielectric reading between 35 and 100.

Point system in all divisions including hook points:  30, 29, 28, 27 etc. down through 15th, 16th and below will receive 15 points.

Minimum weight size rule was deleted for all classes (page 26 rule 10).

Classes with an RPM limit (Antique, Classic, Pro Farm)
RPM disqualifications are per calendar year unless otherwise stated in the rule book (example – third offense).

Classic
add:  MM tractors will be allowed to run manufacturer’s replacement governor.

Pro Stock
add:  Re-casted six cylinder blocks permitted, no aluminum.  Block must accept OEM crankshaft.  Camshaft must be in OEM location.

4WD Trucks
change:  Weight of vehicle to be a maximum of 6350 pounds.

8500# Limited Pro Stock
Tire size remains the same, 24.5 x 32.  No exceptions.

Pro Stock Diesel Trucks
change part of rule 11 on page 50 to read:  Pulling point to be a minimum of 44 inches from center of rear axle to hook point.

Follow PPL’s rule on the MAP groove point of measurement.

change rule 23 on page 51 to read:  Dual rear wheels allowed, only singles allowed on front axle.

Super Stock
Diesel tractors allowed to weigh 8500 lbs. in the 8200# Super Stock class.

9500# Limited Pro Stock
Cylinder head rule to remain the same as in 2013.

9500# Pro Farm
Aluminum rear wheels allowed.

7900# Modified
Weight changed to 8000 lbs.

5800# Modified
change:  Allison engines allowed to run alcohol with maximum 7.48 supercharger overdrive.

add:  Two (2) blown wedge-type automotive engines, cast or aluminum, maximum 575 cubic inches with maximum 8-71 hi-helix superchargers with maximum 40% overdrive, 23 degree OEM heads and weighing 5500 lbs.  Board has discretion to review performance.

Rule changes and additions from the January 12, 2013 ITPA Board of Directors meeting:

Diesel fuel to be used in ITPA competition shall have a dielectric value of no greater than 4.9, nor less than 2.2.

All diesel powered vehicles are required to have a sample valve installed for water and fuel injection sampling, nearest the pump as possible.  All fuel/water sample valves required to be functional without the engine running.

9500# & 12,000# PRO FARM – “new turbo rule”
Turbo – allowed to run one turbocharger with the inlet on the compressor side of the turbo limited to a maximum of 3.00 inches.  One (1) 360 degree map enhancement groove allowed, not to exceed .250 inch in width.  Compressor wheel must protrude into 3″ bore opening at least 1/8 inch.  All provisions allowing air to the wheel other than via the bore and map groove are prohibited.

2013 Purse Schedule

5800# Modified, 6000# Super Stock, 7800# Pro Stock Diesel Trucks, 8500# Limited Pro Stock, 20,000# Pro Stock Semi

$2600 per class minimum – $30 maximum entry fee

6200# 2WD Trucks, 6200# 4WD Trucks, 9500# Limited Pro Stock
$2900 per class minimum – $35 maximum entry fee

8200# Super Stock, 10,000# Pro Stock
$3500 per class minimum – $40 maximum entry fee

7900# Modified

$4000 minimum – $50 maximum entry fee

2000# Mini Rod
$2000 minimum – $25 maximum entry fee

1900# Mini Rod
$1400 minimum – $20 maximum entry fee

5500# Antique, 5500# Classic, 1050# Super Stock
$800 per class minimum – $10 maximum entry fee
Stand Alone Events – $500 per class minimum – $10 maximum entry fee

9500# Pro Farm, 12,000# Pro Farm
$1600 per class maximum – $20 maximum entry fee

All out of state sanctioned events must add $200 purse to each class offered, divided $25 per 8 places.

2013 ITPA Points System

The following point system will be utilized for all ITPA classes for the 2013 season:
1.    30 place points + 15 hook points = 45 points
2.    29 place points + 15 hook points = 44 points
3.    28 place points + 15 hook points = 43 points
4.    27 place points + 15 hook points = 42 points
5.    26 place points + 15 hook points = 41 points
6.    25 place points + 15 hook points = 40 points
7.    24 place points + 15 hook points = 39 points
8.    23 place points + 15 hook points = 38 points
9.    22 place points + 15 hook points = 37 points
10.  21 place points + 15 hook points = 36 points
11.  20 place points + 15 hook points = 35 points
12.  19 place points + 15 hook points = 34 points
13.  18 place points + 15 hook points = 33 points
14.  17 place points + 15 hook points = 32 points
15.  16 place points + 15 hook points = 31 points

Rule changes from the December 9, 2012 ITPA Board of Directors meeting:
 
ANTIQUE
Tractor must have OEM external dimensions cast iron block and crankcase.
 
 
CLASSIC
Tractor must have OEM block, head and crankcase.
 
Electric inline fuel pumps allowed.
 
 
ANTIQUE & CLASSIC
If engine RPM reading is 1-500 over rated RPMs, tractor is disqualified.  If box reading is 0 or in excess of 500 RPMs over rated engine RPMs, the tractor will be checked at the end of the track with a spark plug wire hand held checker to determine RPMs.  This will be allowed only one time per season per vehicle.
SUPER STOCK
No fuel allowed to be injected into the primary air inlet.
 
Light Super Stock weights:  6100 lbs for component vehicles   6300 lbs. for ag chassis vehicles
 
NEW RULE FOR ALL DIVISIONS REQUIRING SIDE SHIELDS (including Pro Farm)
All inline engines are required to have an additional inner side shield consisting of .125 (1/8) thick steel or titanium OR .250 (1/4) aluminum inside of the current .060 steel or aluminum side shields with a minimum of 1/2 inch air gap.  This shield is independent of the current side shield and must be attached to the vehicle chassis (frame) with a minimum of 5/16 fasteners at both ends and center on the bottom and to the engine block at both ends (bolted solid or with a length of 5/16 chain) at deck height on the top.  This shield must extend from the bottom of the head to the centerline of the crankshaft and extend the full length of the block on each side of the engine.
 
 
9500# PRO FARM
Maximum of 3000 engine RPMs for intercooled vehicles and maximum of 3250 engine RPMs for non-intercooled vehicles, before pull, after pull and/or during competition.
 
9500# Pro Farm vehicles are allowed to compete in the 12,000# Pro Farm class weighing 12,000 lbs. with 9500# Pro Farm competition rules.
 
 
9500# PPRO FARM & 12,000# PRO FARM
Maximum of two (2) 360 degree map width enhancement grooves allowed with a maximum width of .250 each.  Map width enhancement grooves will be checked and turbo sealed at the first pull by tech committee/ITPA tech or prior to the first event by ITPA tech.
 
 
PRO STOCK DIESEL TRUCKS
All provisions allowing air to the wheel other than via the bore and map groove are prohibited.  One (1) 360 degree map enhancement groove allowed, not to exceed .250 inch in width.  No superchargers allowed.  Map width enhancement groove is to be checked and turbo sealed at the first pull by the tech committee/ITPA tech or prior to the first event by ITPA tech.
 
No aftermarket/recasted blocks allowed.  Deck plates allowed.
Diesel trucks only, maximum weight 7800 lbs.  Change name of class to 7800# Pro Stock Diesel Trucks.
 
 
Trucks must have a full size steel or OEM body.  The bed floor may be removed and bed gutted.
 
LIMITED MINI ROD
Change the name of class from 1800# Limited Mini Rod to 1900# Mini Rod
 
 
PRO STOCK & SUPER STOCK
Component chassis tractors will be allowed to run any agricultural tractor sheet metal (1960 or newer) with any legal block.  Block does not have to be the same brand as sheet metal.
 
 
 
PRO STOCK
No billet blocks allowed.
 
 
 
4WD TRUCKS
Air bag suspension on front axle allowed as long as there is no means of changing pressure from the driver’s compartment.
 
 
 
8200# LIMITED PRO STOCK
Vehicles to weigh a maximum of 8500 lbs. with 200 lbs. moveable weight.   Change the name to 8500# Limited Pro Stock.
 
3 x 4 smooth turbocharger.  Compressor wheel must protrude at least 1/8 inch into the 3 inch opening.
 
 
MODIFIED
Weight – 7900 lbs.
 
Vehicles with three (3) Allison engines are allowed to compete.
 
 
 
9500# LIMITED PRO STOCK

Outside of cylinder head must be OEM length and width dimensions.  Valves must retain OEM angle.  OEM manifold bolt pattern.

Deck plates allowed up to one (1) inch thick.

 Rule changes from the March 13, 2011 ITPA Board of Directors meeting:

Chassis
Wording has been changed for the rule passed at the January meeting to read:
“Pneumatic, hydraulic and/or electrical lift/support mechanisms on front steering axles are not permitted.  (Expect 4WD Trucks)”      Note:  the mechanical part was deleted

9500# Pro Farm & 8200# Limited Pro Stock
1% tolerance on the cubic inch limit

 

Rule changes from the January 8, 2011 ITPA Board of Directors meeting:
9500# Pro Farm
Intercoolers allowed.  No aftercoolers allowed.  No shifting allowed.  OR  Water injection allowed (no windshield washer fluid, alcohol, etc. allowed as a cooling agent) with shifting allowed.  Any form of H2O (water) is the only cooling agent allowed in the intercooler.  Maximum of 3000 engine RPMs before pull, after pull and/or during competition.
1050# Super Stock and Mini Rods
Deleted the scale charge at certification time for the 1050# Super Stock and Mini Rod divisions.
Protests
Only a full paid competing member will be allowed to protest a competitor.
Chassis
Pneumatic, hydraulic, electrical and/or mechanical lift/support mechanisms on front steering axles are not permitted.  (Except 4WD Trucks)
8000# Pro Stock Diesel Trucks
No deck plates allowed.
7800# Modified
Turbine engine powered tractors are limited to a maximum of 8600 total horsepower rating including water rated as 10%.
Five (5) blown automotive engines with 8-71 superchargers with wedge heads that will accept a stock OEM intake manifold bolt pattern.
Rule changes from the December 12, 2010 ITPA Board meeting:

Protests:

Protester will put up $250.  Protestee will put up $250.  In the event an internal inspection is necessary, fees are $1000 each.

 

7700# Modified
Weight was changed to 7800 lbs. and blower overdrive limit deleted.
5800# Modified
Allison powered vehicles to weigh 5800 lbs. in the 5800# Modified class.
9500# Pro Farm
Intercoolers are allowed and RPMs raised to 3000.
Pro Stock
Diesel super stock vehicles may run in the 10,000# Pro Stock division weighing 10,000 lbs.
Pro Stock Diesel Trucks
No superchargers allowed.  No aftermarket/recasted block or heads allowed.  Deck plates will be addressed at the January ITPA Board meeting.
Light Super Stock
Light Super Stock weights are as follows:
6500# – diesel engine with OEM head and OEM chassis
6400# – diesel engine with aftermarket head and OEM chassis or alcohol engine with OEM
                head and OEM chassis
6200# – diesel engine with component chassis or alcohol engine with aftermarket head and
                OEM chassis
6100# – alcohol engine with component chassis
8200# Limited Pro Stock
Injection pump limited to a 7100 series P-pump with maximum 13 millimter plungers.
9500# Limited Pro Stock rules
1.   9500 lbs. maximum weight.
2.   Engines limited to 640 cubic inches.
3.   Maximum tire size allowed is 24.5 x 32.
4.   No component chassis.
5.   Deck plate allowed up to .625″ thick.
6.   Engine head must be OEM agricultural-type for that brand engine.  Outside of cyclinder
head must measure factory width, length and height (including all casted areas).
Manifold bolt pattern and port location must be in stock location.  These measurements
will be taken from the bottom of the cylinder head.  Height and width of bolt pattern must
be within factory OEM specifications, including head bolts (which means stock location).
All cylinder heads must have factory water jackets, but can be filled.                                 
   
7.   Aftermarket manifolds allowed and must bolt in original port bolt pattern.
8.   No overhead cams.
9. Maximum 2 valves per cylinder.
10. No inner or after coolers.
11. Maximum size injection pump is a 7100 series P-pump.
12. The turbo is a smooth turbocharger limited to a 4.1 inch inlet (no map ring) with all inlet
       air passing through this restriction and a 4.50 inch outlet with all exhaust passing through
       this restriction.  Both inlet and exhaust wheels must protude 1/8 inch into the opening.
13. All chassis and driver rules, including shielding and safety, to be the same as the 8200#
       Limited Pro Stock class.
14. Purse:  Class AA – $2900 minimum, Class A – $2600 minimum.
     

Mini Rod Skid Plate

Mini Rod front axle skid plates must be in one of the two types listed below:
  1. Skid plate mounted to center of axle must be a minimum of 10 inches wide with rolled edges both front and rear. Plate must be a minimum of 4 inches in length. Plate must be centered and securely mounted to front axle and /or frame.OR
  2. Skid plate mounted inline with each frame rail(on both sides) equal in strength to frame rail material. Skid plate surface to be a minimum of 2 inches wide and 10 inches long with a minimum 2 inch curve when measured from the front most part of rolled edge.Note: Both types must be able to support the weight of the front end when checked with a jack. Maximum ground clearance not to exceed 2 inches with front tired in normal operating position.

Tractor Skid Plate
Front axle skid plates specs for all tractor classes except 1050# Super Stock, Antique, Classic and Farm Stock divisions.

  1. Skid plate must be mounted inline with each frame rail and extend from the center of the front axle forward(on both sides) equal in strength to frame reail material. Skid plate surface to be a minimum of 4 inches wide and 12 inches long with minimum 6 inch curve when measured from the front most part of rolled edge.Note: Skid plate must be able to support weight of the front end when checked with a jack. Maximum ground clearance is bottom of front. wheel rim not to exceed 4 inches with front tires in normal operating position.OR
  2. Front axle support to be made of 2.00″ x .095″ chrome moly tubing or 2.00″

    Mini Rod Skid Plate

    Mini Rod front axle skid plates must be in one of the two types listed below:
    1. Skid plate mounted to center of axle must be a minimum of 10 inches wide with rolled edges both front and rear. Plate must be a minimum of 4 inches in length. Plate must be centered and securely mounted to front axle and /or frame.OR
    2. Skid plate mounted inline with each frame rail(on both sides) equal in strength to frame rail material. Skid plate surface to be a minimum of 2 inches wide and 10 inches long with a minimum 2 inch curve when measured from the front most part of rolled edge.Note: Both types must be able to support the weight of the front end when checked with a jack. Maximum ground clearance not to exceed 2 inches with front tired in normal operating position.

    Tractor Skid Plate
    Front axle skid plates specs for all tractor classes except 1050# Super Stock, Antique, Classic and Farm Stock divisions.

    1. Skid plate must be mounted inline 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 minimum 6 inch curve when measured from the front most part of rolled edge.Note: Skid plate must be able to support weight of the front end when checked with a jack. Maximum ground clearance is bottom of front. wheel rim not to exceed 4 inches with front tires in normal operating position.OR

    x .120″ mild steel tubing or same material as tractor frame rails. Front axle support should connect to each frame rail inline and extend toward front of tractor. Front skid/front axle support should have radius to prevent digging into track. Front axle support frame should be strong enough to support front end weight of tractor. Support should have a maximum of 4″ ground clearance.

Tech Sketch

APPROX 4″ Ground Clearance

Tech Front Axle

STANDARD TRACTOR STYLE FRONT AXLE