Seat 1430 Especial 1800 group 2 (1974)
 Source |
Developmen chain 1970: Seat 1430 1974: Seat 1430 Especial 1800 |
Specifications
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1756 cc
2 x Weber 44 IDF
| Group/Class | 2 | Homologation number: 1662, 5594 - transfer group A, and A5009 | |||
| Years active | 1974-1977 | Homologation start: 1/7/1974 and 1/4/1975 and 1/2/1982 Homologation end: 1/4/1975, 31/12/1981 and 31/12/1983 |
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| Engine | |||||
|---|---|---|---|---|---|
| Type | Fiat Twin Cam (Lambredi), Type FC 014.179, straight 4 cyl, 4 stroke, petrol engine | located front longitudinal | |||
| Capacity | 1756 cc | WRC: 1756 cc | |||
| Bore x Stroke (mm) | 84.0 x 79.2 | ||||
| Compression ratio | 10:1 | ||||
| Output power - torgue | 118 HP/ 86 KW @ 6.000 rpm | 15,3 Nm @ 4000 rpm | |||
| Main bearings | nodular cast iron crankshaft with 5 main bearings 53mm diameter, and 50.8mm big end bearing journal diameter | connecting rod length between centers 136mm, big end bearing tunnel diameter 54mm, aluminium alloy Al Gas10 piston 47.3mm piston height | |||
| Materials | block: cast iron Gh26 | cylinderhead: cross-flow Al-Si 62 Fsc Nat aluminium alloy with hemispherical combustion chambers | |||
| Cams/valves | 2 overhead camshafts (DOHC), belt driven | 2 valves/cyl. - 8 valves total. 41.4mm (1977: 42.4mm) inlet valves diameter, 36mm exhaust valves diameter. 2 coil springs per valve. Group 2, (ext. 10/9V of 1/10/1975): 4 valves per cyl - 16 valves total | |||
| Aspiration | natural, 1 x Weber 34 DMS or Solex C34 EIES-4 carburetor | ||||
| Ignition | with contact breakers, firing order 1-3-4-2. Spark plugs Marcill CW-8 LP | 12V battery | |||
| Cooling system | jacketed watercooled with pump, radiator, 252 mm diameter-4 blades fan and thermostat | 7.5 lt | |||
| Lubrication system | wet sump. 1978, group 2: dry sump | 4 lt. 1978, group 2: 15 lt | |||
| Transmission | |||||
| Type | rear wheel drive | 4 or 5 speed manual gearbox | |||
| Gearbox ratios | constant: 1.611/1 (29/18) 1st: 3.797/1 (33/14) 2nd: 2.175/1 (27/20) 3rd: 1.409/1 (21/24) 4th: 1.000/1 (-) R: 3.652/1 (34/15) |
1977, group 2: constant: 1.611/1 (29/18) 1st: 2.718/1 (27/16) 2nd: 1.969/1 (22/18) 3rd: 1.531/1 (19/20) 4th: 1.224/1 (18/25) 5th: 1.000/1 (-) R: 3.652/1 (34/15) |
1982, group A: constant: 1.556/1 (28/18) 1st: 3.667/1 (33/14) 2nd: 2.100/1 (27/20) 3rd: 1.361/1 (21/24) 4th: 1.000/1 (-) 5th: 0.881/1 (17/30) R: 3.520/1 (34/15) |
1982, group A: constant: 1.238/1 (26/21) 1st: 2.724/1 (33/15) 2nd: 1.857/1 (27/18) 3rd: 1.351/1 (24/22) 4th: 1.000/1 (-) 5th: 0.840/1 (19/28) R: 2.806/1 (34/15) |
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| Diffrential ratio | 3.90/1 (39/10), 4.777/1 (43/9). 1976, group 2: 5.375/1 (43/8), 4.444/1 (40/9), 4.300/1 (43/10). 1978: 4.1/1 (41/10) |
hypoid spiral bevel gears limited slip rear differential | |||
| Clutch | dry single plate, 215mm diameter | ||||
| Chassis-body | |||||
| Type | steel monocoque Seat FU chassis with roll-cage. 4 door saloon steel bodyshell. Group 2: plastic extended wheel arches and front/rear spoilers | ||||
| Front suspension | double wishbones, coil springs (1978, d13.5 x 7.25 coils, 337 lbr/m), telescopic shock absorbers and anti roll bar d20/21/22 mm | ||||
| Rear suspension | live axle, 4 radius arms, panhar rod, coil spring (1978, d12.5 x 6.75 coils, 422 lbr/m) with telescopic shock absorbers and anti roll bar d20 | ||||
| Steering system | worm and roller. Group 2: rack and pinion | ratio 16.4/1, 2.8 turns lock to lock. Group 2: 16/1 with 3 turns lock to lock | |||
| Brakes | solid disks all around, 227 mm diameter, front 1 piston caliper 48 mm diameter. Rear 1 piston caliper 34 mm diameter. Group 2: front solid discs with 247 mm disc diameter and 2 piston calipers 48mm diameter, or ventilated discs 250 mm diameter with 2 piston calipers 50.8 mm diameter, or 4 piston calipers 38 mm diameter. 1977, group 2: 4 piston calipers 38mm diameter, and 2 piston calipers 50.6mm diameter 1978, group 2: ventilated discs all around 227mm diameter |
dual circuit with vacuum servo | |||
| Dimensions | |||||
| length: 4.053 m (159.5") | width: 1.611 m (63.4"), group 2: +100 mm | height: 1.420 m (55.9") | |||
| wheelbase: 2.420 m (95.3") | front track: 1.330 m (52.4") | rear track: 1.300 m (51.2") | |||
| Rims - tires | 5 or 5.5 x 13" | ||||
| Weight | 960 kg | 175/70 HR13", 185/60 R13" | |||
| Fuel tank | 39 lt. 1978, group 2: 74 lt | ||||
Results in WRC
Races
Works team: Seat Competition
SourceSeat 1430/1800 group 4 with Antonio Zanini in Monte Carlo rally '76
Source
Source
Drawings
Source
page revision: 75, last edited: 14 Jan 2019 18:21