Callies Ford 3.5L EcoBoost Compstar Crankshaft

Building a high-output 3.5L EcoBoost that can survive sustained boost, repeated pulls, or forced-induction upgrades starts at the bottom end. The Callies Compstar crankshaft gives the 3.5L EcoBoost platform seen in the F-150 a forged 4340 steel foundation finished to race-ready tolerances by American craftsmen in Fostoria, Ohio. Available in 86.7mm or 91.44mm stroke, this crank fits builders chasing displacement or optimizing rod ratio for a specific power target.

Forged from Callies-owned dies. Unlike generic offshore forgings shared across multiple brands, each Compstar crank starts life in tooling Callies owns outright. The triangle-shaped notch in one of the counterweights identifies the forging as genuine Callies material. Semi-finished machining happens overseas under Callies engineering supervision, then every crank ships to Ohio for final sizing, polishing, and quality verification.

Material integrity verified in-house. Callies certifies the 4340 steel chemistry and heat treatment in their own metallurgical laboratory, so there is no reliance on a third-party certificate that may not reflect actual batch composition. Every crankshaft also undergoes 100% Magnetic Particle Inspection to confirm the absence of cracks or inclusions before it moves to the next operation.

Tru-Form radii at every journal. All main and rod journals are ground with strength-enhancing Tru-Form radii that reduce stress concentration at the fillet, where cracks typically initiate under high-load cycling. Full counterweighting controls rotating assembly balance and reduces the demand on the balancing shop during final engine assembly.

Ultra-Case nitriding performed and certified by Callies. The nitriding process is not outsourced. Callies controls and certifies the case depth and surface hardness, producing a journal surface that resists wear and fatigue under the high bearing loads a boosted EcoBoost generates.

Product Benefits

• Forged 4340 Steel: High-strength alloy certified by Callies in-house metallurgical lab for material and heat treatment compliance.
• Two Stroke Options: Available in 86.7mm or 91.44mm stroke to suit different displacement and rod-ratio targets.
• Callies-Owned Forgings: Proprietary dies, not generic multi-brand forgings, identified by the triangle notch on the counterweight.
• Ultra-Case Nitriding: Performed and certified by Callies for consistent case depth and journal surface hardness.
• Tru-Form Journal Radii: Strength-enhancing fillet geometry at all journals to resist fatigue cracking under load.
• Full Counterweighting: Reduces balance correction required during final engine assembly.
• 100% Mag Particle Inspected: Every crank verified crack- and inclusion-free before shipment.
• Finished in the USA: Final sizing, polishing, runout, bolt hole, and oil hole checks performed by American craftsmen in Fostoria, Ohio.

Note: Fits 3.5L EcoBoost found in the 2011-2026 Ford F-150. Available in 86.7mm or 91.44mm stroke. Verify dimensions are compatible with your build before ordering.

About Callies Performance Products: Callies Performance Products engineers and manufactures rotating assembly components from their facility in Fostoria, Ohio. The Compstar line, introduced in 2004, applies Callies engineering oversight and in-house quality certification to components designed to meet the demands of performance and racing applications at an accessible price point. Callies controls forging dies, material verification, heat treatment certification, nitriding, and final machining to maintain quality across the entire production process.

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