Vauxhall Chevette 2300 HS group 4 (1976)
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Specifications

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Group/Class 4/4 Homologation number: 649 and transfer group B
Years active 1976-1981 Homologation start: 1/11/1976
Homologation end: 31/12/1981
Engine
Type Vauxhall Slant-4 16V, straight 4 cyl, 4 stroke, petrol engine located front longitudinally with 45o inclination to the drivers side (LHD)
Capacity 2279 cc WRC: 2279 cc
Bore x Stroke (mm) 97.59 x 76.2 mm
Compression ratio 11.5:1
Output power - torgue 240 bhp @ 8200 rpm 249 Nm @ 6000 rpm
Main bearings 5 of 63.5mm diameter big end bearing diameter 50.8mm, aluminium alloy piston 39 mm compression height
Materials block: chromium cast iron cylinderhead: 1976-1977 works: Lotus 907, 1978 Vauxhall cross flow aluminium alloy with hemishperical combustion chamber
Cams/valves double overhead camshaft (DOHC), belt driven. Blydenstein GT4X inlet and GT5X exhaust camshafts 4 valves/cyl - 16 valves total
Aspiration natural, 2 x Dell'Orto 48 DHLA carburetors
Ignition Luminition Optical trigger electronic ignition with contact breakers, firing order 1-3-4-2 12V battery
Cooling system jacketed watercooled with pump, radiator, fan and thermostat 8 lt
Lubrication system wet sump. group 4: dry sump 4.8 lt
Transmission
Type rear wheel drive ZF or Getrag, 5 speed manual gearbox. Getrag was cancelled for goup B
Gearbox ratios constant: 1.259/1 (34/27)
1st: 2.99/1 (38/16)
2nd: 1.76/1 (35/25)
3rd: 1.30/1 (31/30)
4th: 1.00/1 (27/34)
5th: 0.87/1 (25/36)
R: 3.64/1 (32/19/11)
constant: 0.848/1 (?/?)
1st: 2.30/1 (38/16)
2nd: 1.80/1 (39/21)
3rd: 1.36/1 (35/25)
4th: 1.14/1 (28/30)
5th: 1.00/1 (33/28)
R: 2.82/1 (32/19/11)
1980 Getrag group 4: constant: 1.083/1 (26/24)
1st: 2.31/1 (32/15)
2nd: 1.68/1 (28/18)
3rd: 1.37/1 (28/22)
4th: 1.17/1 (26/24)
5th: 1.00/1
R: 2.74/1 (38/15)
1980 Getrag group 4: constant: 1.579/1 (30/19)
1st: 3.37/1 (32/15)
2nd: 2.16/1 (26/19)
3rd: 1.58/1 (25/25)
4th: 1.24/1 (22/28)
5th: 1.00/1
R: 4.00/1 (38/15)
1980 Getrag group 4: constant: 1.50/1 (24/16)
1st: 2.25/1 (24/16)
2nd: 1.66/1 (21/19)
3rd: 1.36/1 (19/21)
4th: 1.16/1 (17/22)
5th: 1.00/1
R: 2.98/1 (35/18 x 15/16)
Diffrential ratio 3.70/1 (37/10), 3.09/1 (34/11), 3.45/1 (38/11), 3.90/1 (39/10), 4.11/1 (37/9), 4.62/1 (37/8), 5.28/1 (37/7).
1977, Heavy duty: 3.77/1 (49/13), 4.09/1 (45/11), 4.27/1 (47/11), 4.55/1 (50/11), 4.89/1 (44/9), 5.38/1 (43/8).
1980: 3.44/1 (31/9), 3.70/1 (37/10), 3.89/1 (35/9), 4.00/1 (36/9), 4.10/1 (37/9), 4.30/1 (35/8), 4.63/1 (37/8), 4.89/1 (44/9), 5.14/1 (36/7), 5.28/1 (37/7), 5.33/1 (32/6), 5.80/1 (35/6)
hypoid spiral bevel gears plated limited slip rear differential
Clutch dry single plate clutch, 216 mm diameter, or triple plate 197mm diameter
Chassis-body
Type steel monocoque chassis with front suspension subframe. 3 door hatchback steel bodyshell. Group 4: extended wheel arches
Front suspension double unequal wishbones with A arms, coil springs, telescopic shock absorbers and anti roll bar
Rear suspension live axle with 2 lower longitudinal radius links, panhard rod, coil springs, telescopic shock absorbers
Steering system rack and pinion (no servo)
Brakes Front solid or ventilated disc brakes 265 mm disc diameter with 2 piston calipers 48.2 mm diameter. Rear drums 230 mm diameter with 1 double piston caliper 19.1 mm diameter, or rear solid or ventilated discs 265 mm diameter with 2 piston calipers 44.5mm diameter dual circuit without vacuum servo
Dimensions
length: 3.940 m (155.1") width: 1.571 m (61.9"), group 4: +100 mm height: 1.326 m (52.2")
wheelbase: 2.395 m (94.3") front track: 1.314 m (51.75") rear track: 1.314 m (51.75")
Rims - tires 6J x 13" 205/60 LHR x 13
Weight 1000 kg
Fuel tank 55 lt

Results in WRC

Races

Works team: Dealer Team Vauxhall (DTV)

Season
Entry Rally event
Driver
Codriver
Team MC SVE
Entry list
POR KEN GRE MAR FIN S.R TdC RAC
Will Sparrow
Rodney Spokes
works suspe nsion
David Thompson (1300 grp 2)
Simon Thompson
Harold Thompson & Sons Ltd 36th
Peter Thompson (1300 grp 2)
Alan Blackburn
Harold Thompson & Sons Ltd dnf
Statistics
Works starts/finishes 1/0 1/0

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Graham Elsmore with Chevette 2300 HS at RAC '80
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Terry Caby with Chevette 2300 HS at RAC '80
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David Porter with Chevette 2300 HS at RAC '79
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Chevette 2300 HS
chevettehs.jpg Source
Chevette 2300 HS
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Bob Jelley with Chevette 2300 HSR at RAC '84
1983+14+-RAC+Rally-14+BrookesBroad-VauxhallChevetteHSR-SS9+Trentham-Vc839-1.jpg Source
Russel Brookes with Chevette 2300 HSR at RAC '83

Drawings

autowp.ru_vauxhall_chevette_2300hs_rally_car_1.jpg Source
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