For this purpose, Cosworth developed new 16-valve cross-flow cylinder heads. Opel originally wanted to use a two-liter four-cylinder engine for the new car. The greatest success of the Ascona B 400 came just after the presentation of the successor, when Walter Röhrl and Christian Geistdörfer won the world championship title in 1982. This was to succeed the Ascona B 400, which was built according to Group 4 regulations. When the regulations for Group B in the World Rally Championship became known, Opel decided to develop a corresponding car based on the Manta B. This led to the fact that their products were officially available through the Opel dealer network and special edition models were developed together. At the end of the 1970s and the beginning of the 1980s, Irmscher had already proven several times that tuning should not necessarily be equated with tinkering. Nowadays, this chain of words alone rings all the alarm bells among the tie-wearing business economists who now sit in decision-making positions at most car manufacturers. ![]() A German subsidiary of a major American corporation collaborated with an independent tuning company to create a homologation vehicle for rallying. ![]() Rear solid discs 279mm diameter with 2 cast iron piston calipers 40mm diameter, or solid discs 277mm diameter with 4 aluminium piston calipers 31.75mm diameter, or ventilated disks 279mm diameter with 4 aluminium piston callipers 38.2mm diameter.ġ984: front ventilated discs 289mm diameter with 4 aluminium piston calipers 41mm diameter, rear ventilated discs 289mm diameter with 4 aluminium piston calipers 31.At the 1981 Geneva Motor Show, a car debuted that would probably no longer be possible in this form today. See pictureįront ventilated disks 271mm diameter with 2 cast iron piston calipers 38/42/54/57mm diameter, or 289mm diameter with 4 aluminium piston callipers 41mm diameter, or 304mm diameter with 4 aluminium piston calipers 42.8mm diameter. Live axle with 5 longitudinal radius links, panhard rod, coil springs and Bilstein telescopic gas shock absorbers. Kevlar bonnet, boot lid, front and rear wings with wheel arch extensions, side skirts, doors and rear spoilerĭouble unequal 'A' wishbones with coil springs, Bilstein telescopic gas shock absorbers and anti-roll bar 2 door coupe with integral roll cage and sump guard. ZF hypoid bevel gears, 75% limited slip rear differentialĭry, double disk 229mm diameter, or double plate Jacketed watercooled with pump, radiator, fan and thermostat Natural, Bosch L-jetronic electronic multipoint fuel injection, or 2 x Weber 50 DCOE carburetors 10 o angle between inlet valve axis and vertical, 10 o angle between exhaust valve axis and vertical. 35.7mm inlet valve diameter, 30.2mm exhaust valve diameter. Opel 4S phase 3, straight 4cyl, 4 stroke, petrol engineįorged steel crankshaft with 5 main bearings, 57.75mm diameter, big end journal diameter 52mm diameterĬonnecting rod length between centers 134mm, big end bearing tunnel diameter 55mmĬylinderhead: Cosworth cross flow aluminium alloy with hemispherical combustion chambersĢ overhead camshafts (DOHC), chain driven to one camshaft, and gear driven from camshaft to camshaftĤ valves/1cyl. Story of Opel Manta 400 in Rallying: see video part1, part2, part3, part4, part5.
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