Tech Page

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# Liimited 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 competiton.

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:

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 minumum of 4 inches in length. Plate must be centered and securely mounted to front axle and /or frame.

OR
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 suport 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.

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

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:

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 minumum of 4 inches in length. Plate must be centered and securely mounted to front axle and /or frame.

OR
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 suport 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.

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

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 suport front end weight of tractor. SUpport should have a maximum of 4" gound clearance.

APPROX 4" Ground Clearance

STANDARD TRACTOR STYLE FRONT AXLE

Our Major Sponsors