1. Steel Connecting Rods

2. Background Factory connecting rods are mass produced Factory connecting rods are mass produced Cast from regular automotive grade Iron Cast from regular automotive grade Iron Reasons: Faster Easier Cheaper

3. Background Continued I-Beam design reinforces wrong face I-Beam design reinforces wrong face 4 stroke engine revolution places: 4 stroke engine revolution places: Moment load Moment load Compression load Compression load Tension load Tension load

4. When Regular Rods Go Bad Factory Rods are usually the weak link Factory Rods are usually the weak link

5. New Design, New Material New H-Beam design places reinforcement on the proper face New H-Beam design places reinforcement on the proper face AISI 4340 Steel is the most common AISI 4340 Steel is the most common Other Materials also used: Other Materials also used: Titanium Titanium 7075 T-6 Aluminum 7075 T-6 Aluminum Nodular Iron Nodular Iron Pearlite Iron Pearlite Iron 5140 Steel 5140 Steel

6. H-Beam Design Designed on AutoCAD for low weight, high strength Designed on AutoCAD for low weight, high strength 800 HP and 7,500 Rpm Rating (for Pontiac) 800 HP and 7,500 Rpm Rating (for Pontiac) Rods and Caps are forged separately Rods and Caps are forged separately Optimizes grain flow Optimizes grain flow Enhances structural Integrity Enhances structural Integrity Higher Quality control than factory Higher Quality control than factory

7. Specifications of AISI 4340 Steel Density: 7.85 g/cm Density: 7.85 g/cm 3 Tensile Strength (Ultimate): 1220 MPa Tensile Strength (Ultimate): 1220 MPa Tensile Strength (Yield): 786 MPa Tensile Strength (Yield): 786 MPa Percent Elongation at Break: 13.5% Percent Elongation at Break: 13.5% Percent Reduction of Area: 37.3% Percent Reduction of Area: 37.3% Modulus of Elasticity: 205 GPa Modulus of Elasticity: 205 GPa Poisson’s Ratio: 0.29 Poisson’s Ratio: 0.29 Machinability: 50% Machinability: 50% Shear Modulus: 80 GPa Shear Modulus: 80 GPa All Specifications are for AISI 4340 Steel, normalized, 50 mm round

8. Any Questions?