The ZRP crankshaft for Volvo B230 and B234 2.3 L engines is designed for engine tuning projects that maintain a stroke of 80 mm. It allows for the creation of a moving assembly capable of withstanding heavy loads without modifying the stroke to increase or decrease cubic capacity.
Part number C-VOL-001 is fully CNC-machined from solid 4340 aerospace-grade steel. Its design incorporates contoured counterweights, specialized oil passages, and precision-finished bearing surfaces. Heat treatment and plasma nitriding complete the manufacturing process to enhance abrasion resistance.
Technical Specifications
- Brand: ZRP
- Manufacturer Part Number: C-VOL-001
- Compatible engines: Volvo B230 and B234
- Configuration: standard stroke for 2.3 L engines
- Manufacturing: CNC machined from solid stock
- Material: 4340 billet steel, aerospace grade
- Stroke: 80.00 mm
- Journal diameter: 63.00 mm
- Rod journal diameter: 49.00 mm
- Weight: 21.20 kg
- Balancing: performed on Sunnen equipment, with inspection report provided
Design and oiling
- Aero-Wing profiled counterweights: designed to reduce mass and improve the aerodynamic performance of the rotating crankshaft.
- Dual main oil supply: direct passages for lubricant flow.
- High-Speed oiling system: designed to improve oil supply at high RPM.
- Chamfered oil holes: finish of the inlets on the oiling ducts.
- Connection spoke radii of the bearing surfaces: geometry designed to better distribute mechanical stresses.
- Lightweight crankshaft journals with a conical profile: a design that helps reduce mass.
Manufacturing Processes and Inspections
- Full CNC machining: precise production of geometries and bearing surfaces.
- Plasma ion nitriding: surface hardening of the treated areas.
- Multi-stage heat treatments: to achieve the desired mechanical properties.
- Shot blasting: mechanical surface treatment.
- Magnetic particle inspection on each part: detection of surface or near-surface defects.
- Heat treatment to improve abrasion resistance.
- Micro-polishing of bearing surfaces: a finish designed to extend the service life of the bearings.
- Ultrasonic and X-ray inspections: verification of material integrity.
Mounting on Volvo B230 and B234 engines
Before assembly, verify that the connecting rods, pistons, and bearings match the crankshaft sizes and the selected engine configuration. Check operating clearances, clearance between moving parts, and the oiling system. The final cubic capacity depends on the bore used with a 80 mm stroke.
Key Features
- Standard 80 mm stroke for Volvo B230 and B234 2.3 L engine conversions.
- Machined from solid 4340 steel.
- Aero-Wing counterweights and lightweight crankshaft journals.
- High-Speed oiling and chamfered oil holes.
- Plasma nitriding and micro-polished bearing surfaces.
- Controlled balancing with a balance report provided.
