Catalog

  • Ultra Boost – Big Block Chevy Image
  • Ultra Boost – Big Block Chevy

  • Our Ultra Boost family of crankshafts represent the pinnacle of severe duty shafts. Designed specifically for the most harrowing, ultra-high output applications where no exceptions are to be made for reliability, years of experience and talent culminate to shape the industry’s most capable crankshaft. Each Ultra Boost crank is machined from Callies’ renowned 4330 bar stock, sourced from TimkenSteel right here in Ohio. Taking lessons from the Top Fuel world, where our crankshaft routinely outperforms the competition, we’ve implemented similar design language into the Ultra Boost line. Two of the most prominent changes include increased material found on the pin arms and pin tops. These changes, along with others, allow for the most reliable crankshaft that is offered today— helping make sure you spend more time at the track than in the shop.

     

    Callies has developed a wide range of part numbers for the Big Block Chevy engine family.  Any main journal, rod journal, post configuration, stroke or other specialized characteristic that you may require can be provided. Callies Ultra boost crankshafts are truly custom made to match your project.

  • Ultra Boost – Big Block Chevy

    Standard Features

    • Bore Spacings Available: Standard 4.840, 4.900, 5.000, 5.300
    • Stroke Range of 3.400-6.125 in.
    • Flange Options: Full Round or Star, 7/16″ or 1/2″ bolt holes available
    • Rod Journal Diameters Available: 1.888, 2.000, 2.100, 2.200, 2.375 Hemi
    • 8 or 6 counterweight designs available
    • Sold complete with no drill balance
    • Aero efficient Ultra-Shed counterweight profile
    • Aero-Shed super finishing is standard
    • Various keyway configurations available
    • All Big Block Chevy Ultra boost crankshafts are produced from high grade TimkenSteel material
    • Splined Post (RCD Style) available
  • Strokes under 4.250 in. Produced from EN30B
    Strokes over 4.250 in. Produced from EN30B
    Spread Bore 5.300. Produced from EN30B
    Spread Bore 5.300/Strokes over 5.750 in. Produced from EN30B
  • « Back to Catalog
  • Ultra Boost – Big Block Chevy Image
  • Ultra Boost – Big Block Chevy

  • Our Ultra Boost family of crankshafts represent the pinnacle of severe duty shafts. Designed specifically for the most harrowing, ultra-high output applications where no exceptions are to be made for reliability, years of experience and talent culminate to shape the industry’s most capable crankshaft. Each Ultra Boost crank is machined from Callies’ renowned 4330 bar stock, sourced from TimkenSteel right here in Ohio. Taking lessons from the Top Fuel world, where our crankshaft routinely outperforms the competition, we’ve implemented similar design language into the Ultra Boost line. Two of the most prominent changes include increased material found on the pin arms and pin tops. These changes, along with others, allow for the most reliable crankshaft that is offered today— helping make sure you spend more time at the track than in the shop.

     

    Callies has developed a wide range of part numbers for the Big Block Chevy engine family.  Any main journal, rod journal, post configuration, stroke or other specialized characteristic that you may require can be provided. Callies Ultra boost crankshafts are truly custom made to match your project.

  • Ultra Boost – Big Block Chevy

    Standard Features

    • Bore Spacings Available: Standard 4.840, 4.900, 5.000, 5.300
    • Stroke Range of 3.400-6.125 in.
    • Flange Options: Full Round or Star, 7/16″ or 1/2″ bolt holes available
    • Rod Journal Diameters Available: 1.888, 2.000, 2.100, 2.200, 2.375 Hemi
    • 8 or 6 counterweight designs available
    • Sold complete with no drill balance
    • Aero efficient Ultra-Shed counterweight profile
    • Aero-Shed super finishing is standard
    • Various keyway configurations available
    • All Big Block Chevy Ultra boost crankshafts are produced from high grade TimkenSteel material
    • Splined Post (RCD Style) available
  • Strokes under 4.250 in. Produced from EN30B
    Strokes over 4.250 in. Produced from EN30B
    Spread Bore 5.300. Produced from EN30B
    Spread Bore 5.300/Strokes over 5.750 in. Produced from EN30B
  • « Back to Catalog

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