Limited edition 911SC models

Transcription

1 Limited edition 911SC models Limited edition 911SC models Limited edition 911SC models Compared to many other 911 series the 911SC had very few special versions. This was one of the consequences of the decision to cancel the 911 before the decision was reversed. Porsche Weissach Special (1980): A total of 408 'Weissach' limited edition models were produced and delivered to the American market only. This model was produced to honour the Porsche Motorsport team working in Weissach Germany. X2 model year SC Weissach Specials With option number M439, a standard 911SC was converted and delivered with special paint. 50% were in Black Metallic and 50% in Platinum Metallic. The interior upholstery was full leather in Doric Grey with Burgundy piping. A flexible lip was added to the front air dam and a special whale tail rear spoiler installed at the rear. Bilstein dampers were installed to provide a firmer ride. X3 model year SC Weissach Specials. Special Fuchs wheels with Platinum metallic painted centres were used irrespective of body colour. These wheels were fitted with Pirelli CN30 tyres of sizes 185/76VR15 front and 215/6UVRJ 5 rear, on 6JX15 and 7JX15 front and rear wheels respectively. Other changes included: A passenger door outside mirror. Electric sunroof. Fog lights below the front bumper. An external electric aerial was fitted. The stereo system was upgraded with door and rear parcel shelf speakers X4 model year SC Weissach Specials. X4 model year SC Weissach Specials.

2 Clear view of the location of the engine serial number in relation to the oil temperature sensor. Contributor: Lee and Jay Heppe The following table provides cross reference for The following table provides a cross reference for engine series identification codes, engine type, engine series identification codes, engine type, production model year and market. production model year and market. Engine identification codes (930/03) 1978 manual ROW (930/13) 1978 Sportomatic ROW (930/04) 1978 manual 49 state USA (930/06) 1978 manual California USA (930/05) 1978 manual Japan (930/15) 1978 Sportomatic Japan (930/03) 1979 manual ROW (930/13) 1979 Sportomatic ROW (930/04) 1979 manual 49 state USA (930/06) 1979 manual California USA (930/05) 1979 manual Japan (930/15) 1979 Sportomatic Japan (930/09) 1980 manual ROW (930/19) 1980 Sportomatic ROW (930/07) 1980 manual 50 state USA (930/08) 1980 manual Japan (930/10) 1981 manual ROW (930/16) 1981 manual 50 state USA (930/17) 1981 manual Japan 63C (930/10) 1982 manual ROW 64C (930/16) 1982 manual 50 state USA 63C (930/17) 1982 manual Japan 63D (930/10) 1983 manual ROW 64D (930/16) 1983 manual 50 state USA 63D (930/17) 1983 manual Japan The sportomatic transmission requires a specific engine type and can be identified by the number 9 used as the 4th digit of the engine serial number. Another view of the engine serial number on a disassembled engine. Contributor: Simon Gigney SC 02pub.indd 44 30/6/05 1:28:33 pm

3 2-18 In the luggage compartment: Look for corroded components such as fuel tank mounting straps, screw heads, bolts and plumbing. Inspect for paint damage due to brake fluid leakage. Check under and around battery. Rust can be found here if battery has been overcharged and leaked. Remove spare wheel and check for rust or damage underneath. Luggage compartment with spare tyre removed. Contributor: Dan Whiteman Look for obvious signs of repainting and over spray. Porsche painting is of the highest quality and is clear coated Checking to see if a 911SC has been repainted is best carried out in sunlight not inside buildings. Contributor: Gary Cuozzo If the 911SC has been resprayed, a careful look will reveal the evidence. The best place to look for over spray is in hard-to-get-at places, such as forward of doors or under wheel arches. Look for different colours in these areas. A bad repaint job is immediate grounds to walk away. A good quality repaint should not deter you from purchasing, but it will allow a reduction of the price. Look for signs of different shades of paint. Try not to view the 911SC in poor light, or in a garage or under artificial light. Get it out in the sunlight, step back a few metres and walk around. If there are different paints used at different times this will show up fairly easily, as will unprofessional repairs using body filler. A good place to check for this is under the wheel arches. Look to see if the paint is flaking. Porsche paint does not flake. 50

4 5-16 Rear Rear Differential Differential 40% lock limited slip differential: The 911SC optional LSD is the standard ZF mechanical limited slip differential of the 40% locking type. This unit locks at 40% under load and under deceleration. Principle of the locking value: In a standard bevel gear differential without differential lock, the transmission driving torque is distributed evenly to both drive wheels. When cornering normally at part throttle, compensation of the wheel speed difference does not pose any problems. In extreme cornering situations and with different friction values between tyres and road surface, a 50/50 power transmission ratio may rapidly prove inadequate. 40% lock Limited slip differential, fully assembled. 40% lock Limited slip differential, fully assembled. The LSD is used to ensure the transfer of torque or drive from a rear wheel which is spinning and has lost its traction to the other which still retains traction. This action slows the spinning wheel down and allows it to regain its traction. This allows the rear of the automobile to retain maximum available traction and reduces the possibility of a spin-out. How much torque is transferred and when depends on the locking value of the LSD. The following table provides the possible torque or power distribution available at the rear wheels for the two types of differential installed in the 911SC Differential type Locking value Possible power distribution Standard open 0% 50:50 LSD 40% 30:70 NOTE Change in torque distribution in a differential is bidirectional. Torque transfer can be from the left wheel to right wheel or vice versa. 40% Lock ZF, LSD, for the Porsche 915 type, 5-speed manual transmission have part numbers: or % lock limited slip differential, disassembled showing 40% lock limited slip differential, disassembled showing the clutch type discs which differentiate a LSD from a the clutch type discs which differentiate LSD from standard open differential. standard open differential. 158

5 Interior Front seats: There were only two types of seats offered with the 911SC: Standard or comfort seat. Sports seat. The standard seat was offered in many different colours and with many different types of centre covering. These are all described in Appendix B. The standard seat design did not change over the life of the series. All options were offered on all versions except the Weissach special for the USA market and the Ferry Porsche special for the ROW market The sports seats were offered only as an option beginning in model year The seat design was changed slightly and a new sports seat was offered for model year 1981 to Both the standard and sports seats in the 911SC are mechanically adjusted. Rear seats: From model year 1980 it became possible to have the rear seats upholstered in the same fabrics and colours as the front seats. In model year 1983 when the Cabriolet was introduced a new set of rear seats was designed for it. These seats were shortened by 125mm (4.9in). 200

6 10-36 Cruise control repairs Engagement switch replacement: Remove steering wheel and switch housing Remove engagement switch screws and remove switch. Remove the switch from the wiring side connector. CAUTION If the 911SC is fitted with air conditioning the duct on the driver s side has to be undone and moved to access the connector. The engagement switch installation procedure is the reverse of the removal procedure. CAUTION Do not forget in air conditioned 911SCs to retighten the driver s side ducting after the switch connector is reconnected. Servo unit replacement: Locate the servo unit in engine bay, top left. Remove the hose between the heater air connection and the blower motor. Remove the electrical connectors from the servo and the solenoid assembly. Undo the mounting screws, remove vacuum line (small hose) on the servo unit. The vacuum hose is connected to an adapter near the throttle housing. Undo the holder on the throttle lever. Cruise control servo unit. Contributor: Craig Forrest Pull off bowden cable clip on the upper section of the holder and remove servo unit with cable still attached. The servo unit installation procedure is the reverse of the removal procedure. 308