Building a stroked 1.6L EcoBoost for your Fusion or Fiesta ST demands a crankshaft that can handle the added stress of increased stroke without compromising dimensional accuracy or fatigue resistance. Callies answers that demand with the Compstar billet stroker crankshaft, delivering a 91.4mm stroke on a forged 4340 steel foundation that is fully finished and certified at their Fostoria, Ohio facility.
Forged 4340 steel, verified in-house. Every Compstar crankshaft begins as a forging produced using Callies-owned dies, not generic tooling shared across multiple manufacturers. The 4340 steel composition and heat treatment are confirmed by Callies' in-house metallurgical laboratory before the crank advances to finish machining, so you get certified material, not assumed material.
Tru-Form radii on every journal. All main and rod journals are ground with strength-enhancing Tru-Form radii that reduce stress concentration at the fillet, a critical detail on any stroker application where rotational loads are amplified. Main journals measure 1.889 inches and rod journals measure 1.732 inches, both finish-sized and polished by American craftsmen to ensure proper fitment and correct widths straight out of the box.
Ultra-Case nitriding for surface hardness. Callies performs and certifies their Ultra-Case nitriding process in-house, hardening the journal surfaces for wear resistance while maintaining the core toughness of the 4340 forging. This is not a process handed off to a third party; Callies controls and documents every step.
100% Magnetic Particle Inspection. Every Compstar crankshaft undergoes full Mag Particle inspection to confirm there are no cracks or inclusions in the material before it ships. Combined with a final quality control check covering runout, bolt holes, and oil holes, the crank arrives ready to race without requiring additional validation steps at the engine builder's shop.
Product Benefits
- Stroker Stroke: 3.598 inches / 91.4mm for increased displacement over the factory 1.6L EcoBoost.
- Forged 4340 Steel: Callies-owned dies produce a consistent forging with superior toughness and fatigue resistance.
- In-House Metallurgical Certification: Material composition and heat treatment verified at Callies' own lab.
- Ultra-Case Nitriding: Performed and certified by Callies for consistent surface hardness and wear resistance.
- Tru-Form Ground Radii: Strength-enhancing journal fillets reduce stress concentration under high loads.
- 4-Counterweight Design: Balanced configuration averaging 27 lbs for this platform.
- 3mm Post Key: Included for secure damper and timing drive indexing.
- 100% Mag Particle Inspected: Every unit checked for cracks and inclusions before final QC sign-off.
- Finished in the USA: American craftsmen at Fostoria, Ohio complete all final sizing, polishing, and inspection.
Note: Fits 1.6L EcoBoost found in the 2013-2019 Ford Fusion and Fiesta ST. Rod journal: 1.732 in / 44mm. Main journal: 1.889 in / 48mm. Stroke: 3.598 in / 91.4mm. Weight: approx. 27 lbs. Verify dimensions are compatible with your build before ordering.
About Callies: Callies Performance Products designs and engineers crankshafts and connecting rods in the United States, with finishing operations carried out by American craftsmen at their Fostoria, Ohio facility. The Compstar line, introduced in 2004, extends Callies' manufacturing standards to a value-oriented product range without outsourcing quality control, inspection, or final machining.
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Product Specifications & Vehicle Fitment
Review the product details and confirm compatibility with your vehicle before ordering.
| Specification | Details |
|---|---|
| Vehicle Fitment | 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
| Vehicle Trim | ST |
