VolksWagen 1302/1303 S group 2 (1970)
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Home » Rally Cars » VW 1302/1303 S

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Specifications

Parts list
Click here and here for street version

Group/Class 2 Homologation number: 5364
Years active 1971-1973 Homologation start: 1/10/1970
Homologation end: 31/12/1981
Engine
Type VW AD type 2, boxer flat 4 cyl (180o), 4 stroke, petrol engine located behind rear axle, longitudinally
Capacity 1584 cc WRC: 1584 cc
Bore x Stroke (mm) 85.5 x 69.0
Compression ratio 7.5:1, 9.1:1
Output power - torgue 50 HP / 4000 rpm
120-128 HP / 7000 rpm
10.8 kgm / 2800 rpm
Main bearings 5 of 50.9mm diameter big end bearing diameter 45.6mm, aluminium alloy piston 39.4 mm piston height
Materials block: magnesium or aluminium alloy cylinderhead: 2 x aluminium alloy with dual ports
Cams/valves single camshaft in center of block and below crankshaft with overhead valves (OHV), gear driven 2 valves/cyl. - 8 valves total. 35.6mm inlet valves diameter, 32.1mm exhaust valves diameter (St35 GZF). 1 coil spring per valve
Aspiration natural, 1 x Solex 34 PICT or 1 x Weber 32 DHS-1 carburetor
Ignition with contact breakers, firing order 1-4-3-2 12V battery, 45 Ah
Cooling system air cooled with 28 blade centrifugal fan, guide vanes, thermostat and cut-off air-flaps
Lubrication system wet sump with 1 oil cooler click here. 1971, Group 2: dry sump with three gear-oil pump 2.5 lt
Transmission
Type rear wheel drive VW 4 speed manual gearbox. 1971, Group 2: Porsche 914.300.012.13, 5 speed manual gearbox
Gearbox ratios 1st: 3.80/1 (38/10)
2nd: 2.06/1 (35/17)
3rd: 1.26/1 (63/50)
4th: 0.88/1 (53/60)
R: 3.61/1 (43/14)
1971, Group 2: 1st: 3.091/1 (34/11)
2nd: 1.889/1 (34/18)
3rd: 1.261/1 (29/23)
4th: 0.926/1 (27/25)
5th: 0.710/1 (22/31)
R: 3.127/1 (43/20x36/11)
Diffrential ratio 4.125 (33/8), 4.375/1 (35/8), 1971, Group 2: 4.429/1 (31/7) spiral bevel gears limited slip rear differential
Clutch dry single plate, 200mm diameter
Chassis-body
Type steel monocoque VW chassis with roll-cage. 2 door saloon "beetle" steel bodyshell. Group 2: extended wheel arches
Front suspension Macpherson strut with coil springs, telescopic shock absorbers and anti roll bar
Rear suspension semi trailing arm with coil springs, telescopic shock absorbers and anti roll bar
Steering system worm and roller. 1974: rack and pinion ratio 16.4/1, 2.65 turns lock to lock
Brakes front solid disks 277 mm diameter with 1 piston caliper 48 mm diameter, rear drums 230 mm diameter with 1 double piston caliper 17.5 mm diameter. 1972: 248 mm drum diameter with 1 double piston caliper 22.3 mm diameter dual circuit
Dimensions
length: 4.080 m (160.6") width: 1.585 m (62.4"), Group 2: +100mm height: 1.500 m (59.1")
wheelbase: 2.420 m (95.3") front track: 1.379 m (54.3") rear track: 1.351 m (53.2")
Rims - tires 4J or 4.5J x 15", 1972+: 5.5 x 15" 155 x 15"
Weight 850 kg front rear distribution, 40-60%
Fuel tank 45 lt
Drag coefficient 0.41

Results in WRC

Races

Works team: VW Porsche Salzburg / Bosch Racing Team

Season
Entry Rally event
Driver
Codriver
Team M.C SVE
Entry list
S.R KEN MAR A GRE RAC
Entry list
Klaus Russling
Franz Mikes
works 3rd
Gernot Fischer
Herbert Kohlweis
works 4th
Leopold Bosch
Walter Starmann
works 6th
Joginder Singh
Reinhard Knoll
works stee ring
Edgar Herrmann
Manfred Stepany
works stee ring
Gerald Malat
Walter Langeder
works dnf
Janger
Wessiak
dnf
Lennart Börjesson
Thomas Fahlström
?
Erik Hansen
Juul Mathiasen
?
Hans-Peter Krakhofer
Monika Röthlich
ÖAMTC-ZV Krems RRT 11th
Paul Springer
Gottfried Pikel
dnf
Franz Hofer
M. Stoitzner
VW-Günther Perg dnf
Brian Addison
Joseph McKerrell
?
Total points
()
20 20
Statistics
Others starts/finishes 13/3 1/0 2/0 9/3 1/0

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Oil system
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Cooling fins

Drawings

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Engine

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1. Fan housing
2. Coil
3. Oil Cooler
4. Intake manifold
5. Fuel pump
6. Distributor
7. Oil pressure switch
8. Valve
9. Cylinder
10. Piston
11. Oil pressure switch
12. Fan
13. Oil filter
14. Intake manifold pre-heater pipe
15. Connecting rod
16. Spark plug
17. Cylinder head
18. Thermostat
19. Rocker arm
20. Pushrod
21. Heat exchange
22. Valve lifter
23. Carburetor
24. Generator
25. Flywheel
26. Crankshaft
27. Oil pump
28. Camshaft
29. Oil strainer
30. Clutch

Chassis

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Front Suspension of 1303 (Mac Pherson)
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Swing axle and Independent Rear Suspension (IRS)
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