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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

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