Volvo B23A H-Beam Longer Connecting Rods are manufactured from 4340 high tensile steel and are designed for high performance and extreme durability, but these are also “Lightweight” so even more weight has been saved. The pin end is “ribbed” to minimize distortion under heavy inertial loads, while saving any excess weight. The bushings are made from AMPCO 18 material, for excellent resistance to wear and fatigue and have radial groove acting as an oil reservoir. They are shot peened to relieve stress from the material and multi-stage heat treated to increase rigidity. The tight tolerances in the production process, ensure a perfect fitment while optimizing the oil clearances. Bend and twist is tightly controlled.Each rod includes ARP 7/16”0cap fasteners that are rated at 220,000psi, optional ARP Custom Age 625 material 260.00-280.00psi available as an upgrade and the whole kit is supplied with ARP moly and full fitting instructions.
Additional machining processes
- Dowel sleeves for perfect fit and accurate re-assembling
- Lipped Cap Relief for improved big-end integrity at extreme application
- Grooves in Thrust Face for weight reduction
Technical Features of ZRP Connecting Rods
- Two-Piece forging for great strength
- Aluminum – silicon/ bronze bushing with radial groove
- Shot Peening for improved fatigue life
- Magnaflux Inspection guarantees that the consistency of the forged material meets our high-quality standard
- Double ribbed caps for added support
- Multi Stage Heat Treatment for maximum strength, dimensional stability, and fatigue life.
- CNC machining for superior tolerances, precise as much as 0.0002″
- Center to center is maintained under .001″ tolerance
- Finite Element Analysis (FEA) Computer generated stress analysis of con rods
- Optimal balancing for weight matched sets of ± 1gram