Small Block Ford – Ultra UD – Billet

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  • Small Block Ford - Ultra UD - Billet-image
  • Small Block Ford - Ultra UD - Billet

  • The Callies Ultra UD 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.

  • Small Block Ford -Ultra UD - Billet

    Standard Features Weight range of 39 lb. to 47 lb.

    • Stroke range from 2.700” to 4.125”
    • Rod journal sizes 1.850”, 1.888”, 2.000”, 2.100”, 2.123”
    • 351 Cleveland or 302 Ford type main diameters
    • Optional full internal balance to your specific assembly weight (no drilling)
    • Uniquely milled counterweight profiles for reduced weight and windage
    • All rod journals lightened
    • Gun drilled mains
  • Small Block Ford - Ultra UD - Billet 
     Stroke   Main   Pin   Cammed for rod length   Part # 
    3.400 302 2.100 5.400 UJW-01@-UD
    3.250 302 2.100 5.400 UJE01@-UD
    3.500 302 2.100 6.000 EDG01@-UD
    3.500 351C 2.100 6.000 EFG71@-UD
    3.625 351C 2.100 6.100 EFH71@-UD
    3.750 351C 2.000 6.100 EFJ74@-UD
    3.750 351C 2.100 6.100 EFJ71@-UD
    4.000 351C 2.000 6.200 EFO74@-UD
    4.000 351C 2.100 6.200 EFO71@-UD
    4.125 351C 2.100 6.200 EFU71@-UD
      ** Only a partial listing of the available part numbers is listed here. Contact our sales team for a full list. 419-435-2711  Forged - Ultra UD : Dirt/Oval Crankshafts are also available.  /p>
  • « Back to Catalog
  • Small Block Ford - Ultra UD - Billet-image
  • Small Block Ford - Ultra UD - Billet

  • The Callies Ultra UD 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.

  • Small Block Ford -Ultra UD - Billet

    Standard Features Weight range of 39 lb. to 47 lb.

    • Stroke range from 2.700” to 4.125”
    • Rod journal sizes 1.850”, 1.888”, 2.000”, 2.100”, 2.123”
    • 351 Cleveland or 302 Ford type main diameters
    • Optional full internal balance to your specific assembly weight (no drilling)
    • Uniquely milled counterweight profiles for reduced weight and windage
    • All rod journals lightened
    • Gun drilled mains
  • Small Block Ford - Ultra UD - Billet 
     Stroke   Main   Pin   Cammed for rod length   Part # 
    3.400 302 2.100 5.400 UJW-01@-UD
    3.250 302 2.100 5.400 UJE01@-UD
    3.500 302 2.100 6.000 EDG01@-UD
    3.500 351C 2.100 6.000 EFG71@-UD
    3.625 351C 2.100 6.100 EFH71@-UD
    3.750 351C 2.000 6.100 EFJ74@-UD
    3.750 351C 2.100 6.100 EFJ71@-UD
    4.000 351C 2.000 6.200 EFO74@-UD
    4.000 351C 2.100 6.200 EFO71@-UD
    4.125 351C 2.100 6.200 EFU71@-UD
      ** Only a partial listing of the available part numbers is listed here. Contact our sales team for a full list. 419-435-2711  Forged - Ultra UD : Dirt/Oval Crankshafts are also available.  /p>

Sales: 419.435.2711

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