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HKS CLUTCH SERIES

LA CLUTCH

[LA CLUTCH TWIN PLATE]

The tuning expert HKS provides the clutch system for streets and sports use.
Capable torque, pedal effort, and semi-engagement range are closely examined for various driving situations.

Despite the support of approximately 700ps, the main concept for the Twin Plate LA Clutch remains the same. Using "MG Composite Discs" to reduce judder and achieve better driving feel compare to stock clutch. Disc dampers are used to reduce gear noise and protect the transmission from shock torque. The LA Twin also has a "Pivot Ring" within the pressure plate to offer partial engagement like no other twin plate clutch.


(1) Lightweight Cover and Redesigned Diaphragm Spring

Normally, high capacity clutches come heavy pedal feel. HKS have insisted on a diaphragm spring design and used its properties to achieve a pedal which is easy to use on the street but also has a positive feel for accurate control even on the circuit. Cover is made from high strength forged aluminum.


(2) 8.5 Inch "MG Composite Disc" with Damper

A newly designed 8.5 inch disc is used to support high torque levels. Adding a damper reduces gear noise and protects the power train from sudden shocks and damage. A stable frictional coefficient makes the clutch easier to use for reducing judder.


(3) Accurate Disengagement and Friction/ Wear Balance form "Lifting Plate"

Lifting plates attached to the center plate ensures that the clutch disc remains center when disengaged. This extends clutch disc life and also reduces the noise that is heard on multi plate clutches.


(4) "Pivot Ring" for Superior Semi Engaged Clutch Feel

A low strength ring shaped spring on the pressure plate (pivot ring) increases the semi engaged zone of the clutch. This gives a much smoother driving feel which lacks on high capacity clutches


(5) "Lightweight Flywheel" for Improved Response

An ideal flywheel weight for each vehicle is calculated and tested in order to reduce the weight for improving response but not to make it too light that the vehicle becomes uncomfortable to drive. The overall weight of the kit is lighter than that of stock clutch.


Precaution for Use
  • "Allowable Range" is the range of engine torque which is allowable unless the clutch is overheated by intentional clutch semi-engagement.
  • "Conditional Allowable Range" is the range slippage may occur due to rough handling, kickback from tires, components’ distortion.
  • Range beyond Allowable Range" is the range that slippage occurs when a clutch is being engaged under high RPM.
  • "Mechanical Limit" is the point that slippage occurs when accelerating during


LA Clutch vs. Stock Clutch
  BNR34 CZ4A C(N)(P)(T)9A GRB/GDB
Stock HKS Ratio Stock HKS Ratio Stock HKS Ratio Stock HKS Ratio
Pedal Effort (N) N/A 200   162 172 106% 137 154 112% 122 172 141%
FW Wt. (kg) 14.2 7.2 50.7% 6.0 5.1 85.0% 6.3 5.3 84.1% 8.9 5.8 65.2%