Weight

 

1. 8,500 lbs

 

Engine

 

1. Cubic inch limits for tractors are 466 cubic inch and under with a maximum of one 3”x4” smoothbore turbo.  467 cubic inch to 550 cubic inch with a maximum of one 3”x3” slotted turbo.  No engines larger than 550 cubic inch.
2. All 3”x4” turbochargers are to be smoothbore.  3”x3” turbochargers are allowed 0.200” maximum MAP groove.
3. NO slugs or reducers are allowed of any type.
4. Tractors are limited to one “P” series injection pump with 13mm plungers.
5. Tractors must run an OEM Ag production engine block, cylinder head, and tractor chassis.
6. All tractors must run stock intake and exhaust manifolds.
7. NO inter-coolers allowed.

 

Tires

 

1. 24.5 x 32 tires maximum.  Any cut allowed.
2. Front tires may be no smaller than 7.50 x 15 or 7.5L x 15 on any rim width.

 

Safety

 

1. All drivers must wear an approved Fire Suit and DOT certified helmet.
2. Five Point Harness required.
3. Secondary fuel shut off required.
4. All tractors must be equipped with a functioning neutral start switch.
5. All tractors must be equipped with wheelie bars, tie bars attaching rear axle housing to the flywheel housing, and a roll over protection device.
6. All tractors must have a steel flywheel.
7. All tractors must be equipped with a fire extinguisher within reach of the driver.
8. NEW FOR 2010: All tractors must be equipped with front stabilizer bars or skis. The lower most portion of the bar must be no higher than 4" off the ground.