Product Overview
This new product, designed and manufactured in Rochester, NY, features gearing made from 4320 alloy steel and uses a nodular iron casing. The differential has been durability tested on the track and on a dynamometer for consistent torque biasing, leading to predictable performance on the track.
The Torsen differential for the NC MX-5 application uses patented Equvex™ gearing for better load sharing across the internal friction surfaces, which give it excellent durability over vehicle life without relying on clutches that can wear out. This results in a linear, progressive transfer of torque across the differential in turns, providing confidence so the driver can always predict how the car will react.
Performance Characteristics
Torque biasing characteristics are similar to the previous Type-B for NB Miata race cars, with a torque bias ratio (TBR) of 2.7:1 in a drive (on-throttle) mode. Coast-mode TBR is kept lower to allow better turn-in at corner entry. This has proven to work well for race cars of this type.
This Type-B was specifically designed without any breakaway preload, also to give a cleaner and more direct turn-in feel. Mass was kept as low as practical without giving up strength, weighing in at just over 13 pounds, all while being capable of handling up to 5500 Nm of torque in repeated impact or shock loads.
