Beschreibung
The Nostalgia Cars UK Ltd overdrive package utilises the tried and tested Laycock unit, suspended or mounted depending on your vehicle on a substantial cross-member system. Rubber mounts and silent blocks are used, in a configuration designed to limit oscillation/ vibration, insulate the overdrive and eliminate the transmission of noise.
The kit is easily fitted, replacing the existing prop-shaft, and in most cases there is no need for drilling, welding or the re-routing of ‘one-shot’ pipes or the existing wiring harness. In addition the complete installation can be removed at any time, leaving absolutely no trace.
Each Laycock unit is produced to order with a matched speedometer drive ratio. The overdrive is operated by the flick of a switch, whilst engagement is restricted, for design reasons, to top gear. The engagement of the Overdrive gear is hydro-electrical. An integral plunger pump, driven by the input shaft, provides the regulated hydraulic pressure, which is controlled by an electric solenoid valve, switch operated from the dashboard. Because the efficiency of the plunger pump is directly proportional to the RPM of the gearbox output shaft, it is important that engagement of the overdrive is limited to top gear and an inhibitor switch is provided for this purpose.
These overdrive systems are suitable for all ladder frame and cruciform chassis vehicles originally fitted with a prop-shaft.
Please note on some cars with drop foot wells modifications may be required, or it is also possible to install the unit into rear crossmember.
On the road results:
For a given road speed, the Overdrive will reduce the engine revs by 22%:
Direct drive 50mph 2, 500rpm
Overdrive engaged 50mph 1, 960rpm
Conversely, and of interest to Motorway users and those considering touring, for a given engine speed the Overdrive will provide an additional 28% of road speed:
Direct drive 2500rpm 50mph
Overdrive engaged 2500rpm 64mph
Typical Overdrive Kit will include:
Laycock Overdrive unit complete with speedo drive to suit
Cross members and rubber mounting system
Mounting clamps and adhesive
Intermediate shaft with custom machined ends
Rear prop shaft with custom machined ends
Blanking cover for original speedo drive
Speedometer extension cable
Extension cable adapter
Wiring harness, complete with switches, relay and fuses
'Overdrive' escutcheon for master switch
Wiring clips
Nut and bolt fitting kit
Installation instructions
Kits are currently £3150+vat NOW £2916. 67+vat for a limited time
All kits come with a 12 month warranty
We have successfully supplied kits for over 50 vehicles, including:
Rolls-Royce 20 hp
Rolls-Royce 20/ 25
Rolls-Royce 25/ 30
Rolls-Royce Wraith
Rolls-Royce Silver Dawn
Rolls-Royce Silver Wraith
Rolls-Royce Phantom II
Rolls-Royce Phantom III
Bentley 3. 0ltr
Bentley 4. 5ltr
Derby Bentley 3. 5ltr
Derby Bentley 4. 5ltr
Bentley Speed Six
We have also custom fitted kits to many other vehicles, so please don’t hesitate to contact us if your vehicle is not listed.
