Porsche 1987 MY: the 924S USA model

10 hp of power increase and extended equipment


The 1987 model 924S introduced in June, 1986 is powered by the same Porsche water-cooled, 4-cylinder, twin balance shaft engine as the two-valve 944. The engine produces 147 horsepower and a top speed of 134 miles per hour on a test track. Its acceleration time from 0 to 60 mph under test conditions is 8.3 seconds with a five-speed manual transmission and 9.8 seconds with the automatic transmission.

PCNA price was set at $19,900 through November 16,1986 and $21,900 as of November 17, 1986

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TECHNICAL DATA
ENGINE
Bore in inch 3.94
Stroke in inch 3.11
Displacement in in.3 151
Compression ratio 9.7:1
net. power SAE J 1349 in HP 147
At engine speed in rpm 5800
net. torque SAE 1349 in lbft 140
At engine speed in rpm 3000
net. power SAE J 1349 in HP/l 59.3
Max engine speed in rpm 6250
Speed governed by stopping fuel flow at rpm 6500±20
Fuel grade in CLC (RON) unleaded fuel 87CLC (91 RON)
Engine weight (dry) lbs 366
Battery 12V 63amp
Alternator power 1610W/115A
Cooling System Type Closed coolant circuit system with antifreeze for -25°C
Fan drive Electric fan with thermo switch
Engine Lubrication and oil cooling Crankshaft driven with crescent gear pump. Oil full flow heat exchanger in coolant bypass circuit integrated in crankcase
Emission Control 3-way cat. conv. with heated oxygen sensor
meas. ahead of cat. conv./ oxyg. sensor disconnected
Fuel System Type DME
Fuel Delivery 1 electric pump

POWER TRANSMISSION
Front mounted engine and rear mounted transmission bolted together with a connection pipe to make up a rigid drive unit - transaxle
Clutch Hydraulic operated, single plate, dry clutch with diaphgram spring plate in pulled version
Transmission
Convert dia. inch 9.61
Stall ratio 2.5:1
Stall speed in rpm 2800-400
Transmission weight dry in lbs. 148
Transmission weight ready for installation in lbs. 159
Number of gears (ranges) 3 forward, 1 reverse,
parking lock
Gear Ratios
Drive Range 1 2.714
Drive Range 2 1.500
Drive Range 3 1.000
Reverse 2.429
Final drive hypoid drive pinion/ring gear
Final drive ratio 3.455
Manual Transmission
Type
5S
Transmission weight in lbs.
dry
ready for installation

117
121
Gear Ratios
1st gear 3.600
2nd gear 2.125
3rd gear 1.458
4th gear 1.071
5th gear 0.829
Reverse 3.500
Final drive Hypoid drive pinion/ring gear
Final drive ratio 3.89:1
LSD (M-equipment) locking value 40%

RUNNING GEAR
Front Axle Independently suspended wheels on control arms and spring struts
Spring (Mc Pherson) one coil spring per wheel
Shock absorbers Double action hydraulic absorbers in spring struts
Steering Power assisted rack and pinion
Steering wheel dia. in inch 14.96
Steering wheel dia. in inch (M equip. ?) 14.17
Steering wheel ratio in center position 18.85:1
Turning circle dia. in ft. 33.8
Number of steering wheel turns from lock to lock
- Stadard
- M-equipment

3.24
3.24/-
Rear Axle Independently suspended wheels on trailing arms
Springs One each round torsion bar transverse installation
Shock absorbers Hydraulic double-acting
Brakes
Service Brake

Hydraulic, đual circuit brake system with axle division, brake booster, vented brake discs on front and rear wheels
Brake disc diameter in inch
Front 11.12
Rear 11.38
Effective brake disc dia. in inch
Front 8.84
Rear 9.53
Brake disc thickness in inch
Front 0.81
Rear 0.79
Effective total pad area in sq.in. 48.05
Wheel Rims and Tires
Standard tires
Tire Size on rim
Front 195/65 VR 15 6Jx15
Rear 195/65 VR 15 6Jx15
Wheel Rims and Tires
M-equipment tires
Tire Size on rim
Front 205/55 VR 16 6Jx16
Rear 202/50 VR 16 6Jx16
Winter tires
Tire Size on rim
Front 195/65 R 15 6Jx15
Rear 195/65 R 15 6Jx15
Tire Size on rim
Front
Rear
55 R 16 6Jx16
55 R 16 7Jx16
Dimensions (inch)
Lenght 168.90
Width 66.34
Height 50.20
Wheelbase 94.49
Track (with rims) inch
Front 55.8
Rear 54.8
Ground clearence (at total max weight) inch 4.72
Curbed surface clearence (at total max weight) inch 2.09
Weight
Curbweight (front) lbs 1345
Curbweight (rear) lbs 1389
Curbweight (total) lbs 2734
Max. axle load lbs
*Front 1587
*Rear 1940
Max total weight lbs 3373
Permissible */** rack load lbs 165
*The max. total weight, however, must not be exceeded.
**Applies only if the basic rack of the original Porsche Roof Transport System is used.
If old type Porsche ski and luggage racks are used the permissible roof weight is 77 lbs.
Capacities US gal information in Owner's manual is valid
Engine oil 1.72
Engine coolant 2.24
Manual transmission + differential 0.53
Automatic Transmission with torque converter 1.58 ATF Dexron 11D
Differential of automatic transmission 0.26 ATF Dexron R
Power steering 0.63 ATF Dexron 11D
Fuel tank 17.42 (0.9 res.)
Brake fluid 0.05
Washing fluid 1.58
Performance
Top speed in mph
Manuals 134
Automatics 134
Acceleration in seconds (manuals)
0 to 60 mph 8.3
0 to 100 mph 22.3
1/4 mile from standing start - sec 17.2
Acceleration in seconds (automatics)
0 to 60 mph 9.8
0 to 100 mph 27.7
1/4 mile from standing start - sec 17.2


Transmission Oil Specification:
Manuals: Hypoid gear lube SAE 80 to MIL-L 2105
API Classification GL 4
Automatic Transmission (US gal.): ATF Dexron 11D, approx. 1.58 total volume;
approx. 0. 74 converter volume;
approx. 0.92 ATF change volume, watch mark on oil filler tank.
Differential of automatic transmission (US gal.): final drive: approx. 0.26 of SAE 80 to MIL-L 2105B
API Classification GL 5 (filled for service life).


See also:

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