ZZP Ecotec Neutral Balance Shafts

For a good explanation of the function of balance shafts, read our tech article here: Engine Balance and the Balance Shafts The best solution for building a performance motor would be to remove the balance shafts entirely. However this requires changing to an electric water pump and plugging rear oiling holes; not an easy endeavor. For most people, swapping to neutral shafts is a lot easier solution. These shafts help you in 3 ways. Less vibration. As the tech article explains, the factory balance shafts cause a cancellation vibration that works against you at higher rpms. These neutral shafts eliminate the HP loss incurred from creating this vibration. They keep your engine safe at high rpm. Less weight. As pictured below the ZZP shafts are lighter than stock. Lighter rotating parts perform better in every way. Less rotating mass. Balance shafts spin at twice engine speed. HP required to spin an object rises exponentially with speed. Balance shafts on built engines can spin in excess