Published on: Jan 17, 2016 @ 20:40 Originally Published in: 2015 (old website) (C) Jay Auger - website owner & author Notice: Any form of duplication methods (including but not limited to copy/paste of text and screen capture) of the website's content is strictly forbidden.
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HISTORY AND PICTURES
Olle Arnesson already was a veteran of rallycross when the Group B era came along: he had already won the 1980 European Championship title while driving a Porsche. He switched to an Audi quattro and captured the 1983 & 1986 titles as well. For the 1987 season, he traded it for a short wheelbase Audi Sport quattro S1 E2 where he finished 3rd.
Arnesson competed with his S1 E2 in the European Championship until 1989 when he quit to compete in his national Swedish series probably due to the new 1.7 forced induction multiplier imposed by the FISA in the European Championship which required a higher minimum weight for the Audi.
Over its history, the car went through several liveries and aerodynamic variations up until the Group B cars were forcefully retired from rallycross at the end of 1992.
Little is known about the full specifications of Arnesson’s S1 E2 but since the WRC works version was known to produce up to 600 HP it is safe to assume that it probably has been augmented in the area of 700 to 800 HP in the later rallycross horsepower wars.
Arnesson still owns the car and has since made appearances in retro race events.
|Group/Class||Formula A / Division 2||Championships: none|
|Years active||1987~1992||Best finish: 3rd (1987)|
|Type||I-5, DOHC 20v, gas engine||located front longitudinal with 27.5o right inclination|
|Output power – torque||600+ HP @ – rpm||– lb-ft @ – rpm|
|Materials||block: aluminium||cylinder head: aluminium|
|Ignition||electronic / firing order 1-2-4-5-3|
|Lubrication system||dry sump with 1 oil cooler|
|Type||four wheel drive||5 or 6 speed manual gearbox|
|Differential ratio||N/A||Torsen centre differential with Ferguson viscous coupling and adjustable torque distribution 20%-80% to 80%-20% front to rear automatically|
|Clutch||dry – double plate|
|Type||Steel monocoque Typ-85 chassis version of VW B2 platform shortened by 320mm with roll-cage. Typ-81 windshield. Front steel subframe. 2 door coupe steel/kevlar bodyshell with plastic front/rear bonnets and bumpers. Aerodynamic spoilers to the front and rear of the car to increase downforce.|
|Front suspension||McPherson strut with lower wishbone, coil spring, gas shock absorber and antiroll bar|
|Rear suspension||McPherson strut with lower wishbone, 1 longitudinal radius arm, coil spring, gas shock absorber and antiroll bar|
|Steering system||rack and pinion with hydraulic power assistance||12.4:1|
|Brakes||front/rear ventilated rotors with 4 piston calipers||dual circuit with servo|
|length: 4240 mm (166.9 in)||width: 1860 mm (73.2 in)||height: 1344 mm (52.9 in)|
|wheelbase: 2224 mm (87.6 in)||front track: 1520 mm (59.8 in)||rear track: 1502 mm (59.1 in)|
|Rims – tires||16 inch||Firestone|
|Dry/Unladen Weight||1050 kg (2315 lb) *estimated||Bias: N/A|
|Fuel tank||25 litres|
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