Short axle ratio 5.0:1 for Lotus Elise Mk2 and Exige Mk2 with 2ZZ engine
The KOMO-TEC axle ratio with a ratio of 5.0:1 was developed for Lotus Elise Mk2 and Exige Mk2 with Toyota 2ZZ engine and C64 manual transmission.
Compared to the stock axle ratio of 4.63:1, the overall ratio is shortened by about 8%. This results in all gears being shorter, and the vehicle accelerates noticeably more agilely. The engine reaches its powerful RPM range faster, leading to significantly improved performance, especially on winding country roads and racetracks.
Noticeably more agile driving behavior
With the shorter axle ratio, a higher drive torque is available at the wheel in every gear. The vehicle responds more directly to throttle movements and accelerates noticeably more spontaneously after corners and when switching between different speed ranges.
The engine power itself is not increased by the axle ratio. However, the existing power is utilized more effectively in acceleration.
Optimal in combination with a limited-slip differential
The combination of the short axle ratio with a suitable limited-slip differential is particularly recommended.
While the shorter ratio increases the drive torque at the wheels, the limited-slip differential improves its transfer to the road. This allows for more traction to be built up, especially when accelerating out of tight corners.
The combination offers decisive advantages:
Improved acceleration
More effective power transfer
More traction at corner exit
Reduced slip at the inside drive wheel
More direct response behavior
Better utilization of the powerful RPM range
Significantly increased performance during sporty driving
Ideal for track days and racing use
Gear ratio comparison
| Version | Axle ratio |
|---|---|
| Stock ratio | 4.63:1 |
| KOMO-TEC axle ratio | 5.0:1 |
The ratio is approximately 8% shorter compared to the stock. At the same driving speed, the engine RPM is correspondingly higher. At the same time, the theoretically achievable speed in the individual gears is reduced.
Suitable for
Lotus Elise Mk2 with Toyota 2ZZ engine and C64 transmission
Lotus Elise 111R with C64 transmission
Lotus Exige Mk2 with Toyota 2ZZ engine and C64 transmission
Other 2ZZ applications with C64 transmission after technical inspection
Compatibility must be checked before ordering based on vehicle model, engine code, transmission type, and existing transmission configuration.
Advantages
Short axle ratio of 5.0:1
Stock ratio 4.63:1
About 8% shorter overall ratio
Shorter ratio for all forward gears
Noticeably more agile acceleration
Faster reaching of the powerful RPM range
More direct response behavior
Significantly improved performance
Especially suitable for sporty road vehicles and track days
Optimal for combination with a limited-slip differential
Scope of delivery
1 × axle ratio 5.0:1 for the Toyota C64 transmission
Limited-slip differential, transmission bearings, seals, operating fluids, and other mounting parts are not included in the delivery unless expressly stated otherwise.
Possible additional transmission noise
Due to the construction-related slightly increased tooth flank play, the transmission may operate slightly louder with this axle ratio than with the stock ratio.
Slight additional running or gear noise may occur and do not fundamentally represent a technical defect. A correct installation and proper adjustment of the gearing are prerequisites.
Important installation note
Installation requires complete disassembly and subsequent readjustment of the transmission. The installation may only be carried out by a qualified transmission or motorsport specialist.
Tooth flank play, load image, bearing preload, and all installation dimensions must be adjusted and checked according to the technical specifications. Worn bearings, synchronizer rings, seals, and other transmission components should be inspected during the overhaul and replaced if necessary.