Description
Callies Compstar LS1 crankshafts provide proven race-grade reliability and precision engineering for high-performance GM LS stroker builds. Engineered to endure severe loads while maintaining efficient rotating weight, each Compstar LS shaft features deep case nitriding for superior journal hardness, gun-drilled mains, and lightened rod journals to enhance throttle response. Configured with a popular 4.000" stroke, prepped for standard ~1785g bobweights, and cam-cleared for 6.125" connecting rods, this crankshaft provides the ideal balance of strength, performance, and value for competitive street, strip, and power-adder applications.
| Specification | Detail |
|---|---|
| Engine Platform | GM LS Series (LS1/LS6/LS2/LS3) |
| Series | Callies Compstar |
| Stroke | 4.000" (Stroker Dimension) |
| Main Journal Diameter | 2.559" |
| Rod Journal (Pin) Diameter | 2.100" |
| Cammed for Rod Length | 6.125" |
| Reluctor Wheel | 24x |
| Heat Treatment | Case Nitride |
| Target Bobweight | Counterweight prepped for ~1785g |
| Average Weight | ~49 lbs (Balanced to 1700g Bobweight) |
| Snout Keyways | Dual Linear Post Keyways |
Features:
- Case nitride heat treatment significantly increases surface hardness and journal fatigue life
- Proven 4.000" stroke geometry ideal for 383, 408, 416, and 427 cubic-inch LS stroker configurations
- Gun-drilled main journals reduce rotational mass and improve internal crankcase pressure equalization
- All rod journals are lightened to optimize transient engine acceleration and responsiveness
- Counterweights prepped for a target 1785g bobweight to simplify precision balancing
- Cam-cleared counterweight profile engineered specifically for 6.125" aftermarket connecting rods
- Dual linear post keyways on the snout securely locate dampers for supercharged or high-RPM applications
- Equipped with an installed 24-tooth (24x) reluctor wheel for early LS factory and standalone engine management systems
Details
Shipping Information
- H12.00"
