Description
Your request for a lightweight yet durable crankshaft for the powerful Big Block Chevy engine has been answered. Callies design team has optimized material distribution throughout this crankshaft to produce a component that is exceptionally strong yet easy to balance. While many BBC crankshafts are counterweighted simply to offset balance forces detected at main bearings 1 and 5, Callies Magnum Mass Correct counterweights are strategically positioned to reduce imbalance forces across the entire length of the shaft. The result is superior bearing life and minimal wear.
Material distribution over the rod journal arms and critical load-bearing regions has also been enhanced, maximizing the strength-to-weight ratio for an extended, fatigue-resistant service life. Additionally, Callies Dual Arc leading edges create a unique counterweight profile that significantly cuts disruptive crankcase windage—a critical advantage in high-RPM, large-displacement big blocks.
| Specification | Detail |
|---|---|
| Engine | Big Block Chevy |
| Material | Forged 4340 Steel |
| Rear Main Seal | 2-Piece |
| Stroke | 4.500" |
| Main Journal | 2.750" |
| Rod Journal | 2.200" |
Features:
- Manufactured from high-purity premium forged 4340 steel
- Callies Magnum Mass Correct counterweights minimize imbalance forces along the full shaft length
- Dual Arc leading edges reduce parasitic crankcase windage at high RPM
- All rod journals drilled with generously radiused lightening holes
- Optimized material distribution on rod journal arms for maximum fatigue life
- Average finished weight: ~69 lbs. (typical 4.500" stroke shaft)
Details
Shipping Information
- H12.00"