Quote:
Originally Posted by 122554
What the hell is a Porsche 428S4?
Or do you mean 928?
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haha, indeed not 428 but 928.
Was introduced in 1987, at least in Germany were I was living at that time, not sure about the US, basically a 928 with some upgrades, not AWD as some people think:
1987
Model designation: 928 S4
Weight: 1590 kg (3500 lb)
Engine displacement: 5.0 L
Valves: 32
Power: 320 PS (316 hp, 236 kW) / 300 PS (296 hp, 221 kW) for Australia.
Changes:
Different style pistons, cylinder heads, camshafts, intake and larger intake valves compared to earlier 5.0 L engines.
Nominal static compression ratio 10.0:1 (True ratio between 9.4:1 and 10.0:1, depending on parts used).
Cylinder head studs used in all earlier engines replaces with bolts making it easier to remove heads while engine is in engine bay.
Updated LH-Jetronic injection and ignition changed to EZK system, two knock sensors added to engine. Single disk clutch on manual transmission cars, larger torque converter on automatics.
Modified front brake calipers into use with 2 mm diameter increase for large piston. Cars sold to U.S., Canada, Australia and Arabic countries got new parts once remaining old design caliper stock was used up.
New style front & rear bumpers and rear wing spoiler.
Redesigned front and rear bumper light assemblies.
Body changed compared to earlier models to accommodate larger rear lamps, rear seat area modified to give room for new torque converter.
Upwards folding rear spoiler and piston oil squirters in engine block on early cars only.
Different horsepower rating for Australia due to different ignition map used because of possible low grade fuel.