For the rally version, the engine was upgraded to the “phase 2” setup as used in the Group B rally Ascona B 400 at the time. Besides this, the engine of the road car prototype is said to have been a basic 144 BHP “phase 1” unit from the B 400 production model and was left untouched. The extra mass of the entire system was said to increase the weight of the car to around 1200 kg (2690 lbs). The particular system engineered for the Manta project was set up to distribute torque Front 36% / Rear 64%, which is typical for a car of this layout. It reacts almost instantaneously, maintaining traction and eliminating slippage.” When one axle starts to slip, torque is transferred to the other axle.
This is dependent on the differential between the speeds of the front and rear driveshafts.
This consists of inter-meshed vanes running in a high viscosity silicone guild that transmits torque in varying degrees depending on its temperature, which is varied according to friction generated between the sets of vanes. “The heart of the Ferguson system is the Viscous Control torque splitting device. However, no official documents were made available from Opel Motorsport (as it is expected of most prototypes) to confirm the actual number of prototypes built.īill Munro, author of the book “ Traction For Sale“ (FFD’s history), explains in detail the workings of the company’s flagship 4WD system: A second Manta was reportedly converted to 4WD and updated to the rally “wide” specifications for comparison purposes. For this, FFD raided their conversion parts bin and rigged up a system that is said to having used Triumph 1300 uprights and driveshafts for the front axle. It is said that it took the Ferguson team approximately six months to produce a driveable prototype. Homologation Modelįor this very special study project, Opel provided a basic, all white, “narrow body” road car which was reportedly driven straight from Rüsselsheim, Germany, to FFD in Coventry, England. The British company was already offering 4WD conversions on customer cars and were providing them for Opel Monza and Senator models and had engineered full-time 4WD systems for production for the AMC Eagle and aftermarket upgrades on Triumph 2000s and Stags and for the Range Rover. Tony Fall contacted FF Developments (FFD) for them to design a suitable 4WD system specifically for the Manta. Please contact Opel Singapore for further information. The charging time depends in particular on the power of the charger on board the vehicle, the charging cable and the type and power of the charging station used. They may vary depending on actual conditions of use and on different factors such as: speed, thermal comfort on board the vehicle, driving style, vehicle load and outside temperature. *** The range and electric consumption figures mentioned comply with the WLTP test procedure, on the basis of which new vehicles are type approved from 01 September 2018. For the actual product specifications, please check with our sales consultant on the latest detailed information. Opel Singapore reserves the right to change product specifications at any time. Some of the equipment described or shown may only be available in certain countries or may be available at extra cost. Some of the information published may not be correct due to product changes which may have occurred after the product was launched.
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