The BTR, BR, and RCT
A Ruf sports car is more than the sum of its technical parts. It is a statement of craftsmanship and quality constructed by car enthusiasts for people who love driving.
Lightweight construction options include door, hoods, and fenders of Kevlar or aluminium, which reduce vehicle weight. Further weight savings available include the reduction of superfluous interior equipment and choice of lightweight manually adjustable racing seats, interior panels, and manual window lifts. Lightweight structural bumper parts and thin glass windows may be chosen to further reduce body weight. A Ruf may also be ordered without undercoating and/or soundproofing matedals for additional weight savings. Examples of Ruf luxury include optional leather on interior seat surfaces, door panels, steering wheel, sun visors, headliner, safety rollcage and/or normally carpeted surfaces. Electronic luxury includes items such as CD,stereo system, telephone, and mobile FAX.
Some aspects, however, are not negotiable. An example is the brake system which includes increased size and vented rotors with improved six speed transmission with a precise and rapid shift pattern provides distinct performance advantages. Its carefully spaced gear ratios are selected to match the requirements of a turbo engine and keeps this fascinating six cylinder boosted to the optimum pressure range in all driving situations. Unlike other semi-automatic shift systems, the optional electronic clutch system (EKS) provides convenience without losing power. The suspension has been Ruf refined to firmer and more stable levels. Stiffer springs and Bilstein gas shock absorbers, a decreased ride height of about 40 mm, and larger stabilizers which reduce the roll angle provide optimal handling without sacrificing ride comfort.
All wheel or rear wheel drive?
For decades Porsche AG has favored a classic construction arrangement with rear mounted engine and rear wheel drive. This configuration represents one of Prof. F. Porsche's major design principles and provides the advantages of excellent wheel traction and optimum interior space. During acceleration this configuration also Provides the highest tractive forces due to the drive axle static load of the rear mounted engine and transmission and dynamic weight transfer. Under braking the advantages of the rear mounted engine principle are also apparent. The dynamic weight transfer which is so helpful under acceleration leads under braking to a near perfect front to rear load distribution, allowin the highest possible braking forces. The tendency
to oversteer during fast cornering, often mentioned negatively when discussing
rear engine installations, has been compensated for by continuous development and improvements in drivetrain and suspension technologies. Under normal driving conditions a rear engined Ruf can be precisely controlled at all times.
A new aspect of driving fascination for sports car, enthusiasts and experts is all wheel drive. Under conditions such ,as heavy rain and snow, all wheel drive improves not only the traction force but, also provides easier handling and control while approaching limiting speed. All wheel drive also offers improved safety on dry roads. In a fast corner taken near the limit it provides increased stability and reduces the tail out attitude under braking, a further safety feature. The dynamic coupling of the axles which reduces aquaplaning tendencies is appreciated by both experienced and novice drivers.
Five or six speed transmission?
Automobile development has been
driven by concerns for safety and comfort improvements as well as increased performance and speed. Standard production cars which have long been equipped with three or four speed transmissions today use five speed transmissions. Currently, high performance cars like a Ruf which reach speeds in excess 300 km/h require a six speed transmission to properly match engine and speed. Ruf's advanced engineering development offered customers a Rbf factory five speed when Porsche production turbos only had a four speed transmission. With the advent of five speed production
transmissions, Ruf presented a completely new six speed transmission. This allows for closely matching the engine rpms to any driving condition and a resulting increase in boost level by the turbocharger for improved engine response, and is why Ruf six speed transmissions are installed in all Ruf sportscars. For customers who prefer it, a five speed option remains available.
Electronic clutch system (EKS) or pedal operated clutch?
In a sports car, conventional ciutches may require, in some situations, excessive and tiring clutch activation. During shifting, the engine and transmission must be disengaged by forcibly depressing the pedal. On country roads or during highway driving, this is barely noticed. However, in city stop-and-go traffic or on roads which require frequent and rapid shifting conventional clutch operation may become tiring and stressful. The EKS system perfected by Ruf ends this problem. Similar to a car with automatic transmission, there are only the brake and gas pedals on the floor. Clutch operation is controlled via electrohydraulic devices, as in a modern Formula 1 race car, responding to signals produced by the gas pedal sensor and the gearshift lever. The gearshift is used as usual, but this system allows elimination of the clutchpedal. The EKS system will also not engage the clutch if an improper gear is selected, thus protecting the engine from overreving due to incorrect gear selection.
EKS offers the convenience of an automatic transmission without sacrificing the advantages of a manual gear box. The driver can still reduce engine and gearbox oading by double clutching during downshifting and the problems associated with clutch slip, during initial starts from a stop become only a matter of sensible gas pedal actuation.
360Hp? 370Hp? 415Hp?!
The perfection of driving begins at Ruf with increased engine power. Maximum power, however, is not the only objective. Environmental compatibility, "economy, reliability, and longevity are hallmarks of all Ruf engines. The Ruf BR 3.3 engine is based on the six cylinder Porsche turbo engine with an increase of 40 bhp to 360 bhp and has a modified version of the reliable K-jetronic with an ignition timing data: base. This engine is especially rugged and popularly priced, The more powerful RCT 3.6 engine is based on the flat six of the Carrera or 4 and is the only Ruf engine with Motronic controlled twin ignition. Though rated at 370 bhp, the modern 3.6 RCT engine arrangement system provides exceptional fuel economy. The perfection of driving pleasure
most powerful of the Ruf monoturbos is the BTR 3.8. This engine is enlarged to 3746 cc and develops 415 bhp at 6000 rpm. It is based on the new Porsche Turbo 3.6 engine which is praised unanimously by automotive journalists for its response and power output. The conversion includes a cylinder bore enlargement of 2 mm and uses a hot film air flow sensor to aid in exact air fuel preparation and fuel conservation. This sensor is also used in the RCT 3.6. Ruf engines meet or exceed all European emission requirements and are also approved by the strict U. S. standards.
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