HCF is pleased to offer a paddle shift conversion for the Graziano L140 transaxle. This conversion allows the driver a clutch-free, sequential shifting operation for increased driving focus and precision. The system is bespoke, but adapted from the gearbox control system in the successful Dallara Stradale.
The conversion consists of the following items:
1) Hydraulic main unit with solenoids, pressure sensor, filter and accumulator
2) Two instrumented actuators for gear selection and engagement
3) Electric oil pump
4) Hose kit and nipples
5) Wiring harness
6) Electronic Gearbox controller
7) Paddle shift mechanism from the Stradale
8) CSC conversion components to make it an instrumented unit
Like popular racing transaxles available, this conversion allows for the driver’s hands to remain on the steering wheel and for shifts to be executed faster than with a conventional H pattern shifting motion. The system also allows for no-lift shifting operation which further reduces the total shifting time required. Actuated by the included paddle shifters or a strain gauge, shifts are accomplished in 186ms as depicted on the chart in the gallery below.
The primary benefits of HCF’s sequential shift conversion versus currently available alternatives are:
The system has been through extensive testing and has a service life in excess of 50k kms with no maintenance required. It retains the OEM Graziano release bearing used in the L140 and has been programmed to work with 4 different clutch/flywheel packages: HCF’s Kevlar clutch package, two of HCF's Ceramic clutch packages and a Tilton 4 Plate Carbon clutch package. Wheel speed sensors are incorporated into the programming to maximize safety and minimize the potential for damage to the engine and gearbox from a manual over-rev.
Gearbox controller and actuators are provided fully programmed. Final install into the car requires several inputs found in most modern standalone and factory ECUs including Engine RPM, gas pedal position, a brake signal and an output to cut ignition and modify the gas pedal position sensor.
The kit is supplied complete, with a standard length, terminated wiring harness and hydraulic hoses designed to mount the hydraulic unit near the gearbox. Please inquire on custom length harnesses if your system requires alternate placement. HCF is able to accommodate requests for individual wire lengths supplied terminated and tested from the factory for customers desiring a custom install; please request a wiring schematic. Advanced datalogging supported with Bosch C70 professional motorsports equipment.
Dallara Stradale - Stig hot lap
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