The ZRP Stroker crankshaft for Volvo B230 and B234 2.3 L engines increases displacement to 2,351 cm³ with a bore of 96 mm. Its stroke of 81.20 mm increases the distance traveled by the pistons and the volume swept in each cylinder. This configuration is suitable for engine builds seeking increased displacement.
Part number C-VOL-003 is fully CNC-machined from solid blocks of 4340 aerospace-grade steel. Its manufacturing process combines heat treatments, plasma ion nitriding, and a precision finish on the bearing surfaces to meet the demands of tuned engines.
Technical Specifications
- Brand: ZRP
- Manufacturer Part Number: C-VOL-003
- Compatible Engines: Volvo B230 and B234
- Configuration: Stroker, increased stroke and cubic capacity
- Manufacturing: CNC machined from solid stock
- Material: 4340 billet steel, aerospace grade
- Stroke: 81.20 mm
- Connectingrod journal diameter: 63.00 mm
- Rod journal diameter: 49.00 mm
- Weight: 21.30 kg
- Cubic capacity with a 96 mm bore: 2,351 cm³
- 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 oil ducts.
- Connection spokes of the bearing surfaces: engineered to better distribute mechanical stresses.
- Lightweight crankshaft journals with a conical profile: a design that contributes to weight reduction.
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 and improve abrasion resistance.
- Shot blasting: mechanical surface treatment.
- Magnetic particle inspection on each part: detection of surface or near-surface defects.
- 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
The increased stroke requires verification of the compatibility of the connecting rods, pistons, and bearings with the selected configuration. In particular, check the position of the pistons at top dead center, the compression ratio, and the clearances of the moving parts within the cylinder block. The cubic capacity of 2,351 cm³ corresponds to a bore of 96 mm and a stroke of 81.20 mm.
Key Features
- Cubic capacity increased to 2,351 cm³ with a 96 mm bore.
- 4340 steel machined from solid for demanding engine builds.
- Specialized high-speed oiling and chamfered oil holes.
- Plasma nitriding and micro-polished contact surfaces for abrasion resistance.
- Controlled balancing with a balance report provided.
