BMW 3.0L M3 S50B30 (E36) Billet Crankshaft
ZRP crankshafts are manufactured from aerospace grade 4340 solid billet steel and no compromises have been made to the quality of the material, in order to ensure the best possible product.
They are designed carefully, from our vast experience, to provide the best possible engine performance and the production process consists of very strict inspections to ensure that they have the best quality and tight tolerances for perfect fitment. BMW crankshafts have undercut counterweights to reduce rotating mas and tapered rod journals for weight reduction.
We use CNC machining for precise results, multi-stage heat treatment, ION (Plasma) Nitriding for hardening and heat treatment for superior wear resistance, Magna-fluxing for flawless surface finish, shot peening for stress release, Micro-polishing for longer bearing life. Finally, they are sonic tested and X-rayed to ensure a reliable end product.
Crankshaft design features straight oil holes for better oiling of the rod journals and are balanced to 1gr.cm +/- 0.1 using the state of the art Sunnen machines.
Balance report included in the package.
All ZRP Crankshafts are fully balanced and ready to install.