Catalog

  • Ultra Dirt - LS - Forged Image
  • Ultra Dirt - LS - Forged

  • The Callies Ultra Dirt crankshaft family represents the most reliable and highest performing evolution in shaft design for naturally aspirated applications. Machined from Callies’ American made 4330 bar stock or proprietary 4340 forgings, this crankshaft was specifically designed for circle track and endurance racing where the least amount of reciprocating weight is demanded, while not sacrificing strength. Improvements over the outgoing XB and XL cranks include more robust pin arms to decrease torsional fatigue, radially narrowed counterweights (versus pendulum-cut), as well as more material around the centerline to virtually eliminate flexing. These changes come together to make the best endurance crankshaft available so that your engine runs better, for longer.

  • Ultra Dirt - LS - Forged

    Standard Features

    • Stroke range from 2.600” to 4.250”
    • Several rod journal configurations available
    • 2.559” and 351C mains available
    • Standard wet sump post; dry sump optional
    • All pins lightened, mains gun-drilled
    • 8 counterweight design
    • Full internal balance available upon request
    • Radially narrowed counterweights to decrease weight; light bobweights recommended
  • Ultra Dirt Crankshaft - LS - Forged

     Stroke   Main   Pin   Cammed for rod length   Part # 
             
    3.625 2.559 2.000 6.125 APH-34W-UD
    3.750  2.559 2.000 6.125 APJ-34W-UD
    3.900  2.559 2.000 6.125 APC-34W-UD
    4.000 2.559 1.888 6.125 APO-39W-UD
    4.000 2.559 2.000 6.125 AWO-34W-UD
    4.125 2.559 2.000 6.125 AWU-34W-UD

     

    ** Only a partial listing of the available part numbers is listed here. Contact our sales team for a full list. 419-435-2711 

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  • Ultra Dirt - LS - Forged Image
  • Ultra Dirt - LS - Forged

  • The Callies Ultra Dirt crankshaft family represents the most reliable and highest performing evolution in shaft design for naturally aspirated applications. Machined from Callies’ American made 4330 bar stock or proprietary 4340 forgings, this crankshaft was specifically designed for circle track and endurance racing where the least amount of reciprocating weight is demanded, while not sacrificing strength. Improvements over the outgoing XB and XL cranks include more robust pin arms to decrease torsional fatigue, radially narrowed counterweights (versus pendulum-cut), as well as more material around the centerline to virtually eliminate flexing. These changes come together to make the best endurance crankshaft available so that your engine runs better, for longer.

  • Ultra Dirt - LS - Forged

    Standard Features

    • Stroke range from 2.600” to 4.250”
    • Several rod journal configurations available
    • 2.559” and 351C mains available
    • Standard wet sump post; dry sump optional
    • All pins lightened, mains gun-drilled
    • 8 counterweight design
    • Full internal balance available upon request
    • Radially narrowed counterweights to decrease weight; light bobweights recommended
  • Ultra Dirt Crankshaft - LS - Forged

     Stroke   Main   Pin   Cammed for rod length   Part # 
             
    3.625 2.559 2.000 6.125 APH-34W-UD
    3.750  2.559 2.000 6.125 APJ-34W-UD
    3.900  2.559 2.000 6.125 APC-34W-UD
    4.000 2.559 1.888 6.125 APO-39W-UD
    4.000 2.559 2.000 6.125 AWO-34W-UD
    4.125 2.559 2.000 6.125 AWU-34W-UD

     

    ** Only a partial listing of the available part numbers is listed here. Contact our sales team for a full list. 419-435-2711 

    /p>

  • « Back to Catalog

Sales: 419.435.2711

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