Abarth Lancia 037

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Keywords: Abarth Lancia 037
Description: The described system is the same carried out for the winning FIAT 131 ABARTH but the LANCIA technicians, because of power demand, added a mechanism of overfeeding through a ROOTS volumetric

The described system is the same carried out for the winning FIAT 131 ABARTH but the LANCIA technicians, because of power demand, added a mechanism of overfeeding through a ROOTS volumetric compressor. Such compressor, also defined VOLUMEX, is a technical detail directly coming from the race engines. Some track cars, in fact, as the ABARTH 035-LE MANS and the BETA MONTECARLO-GIRO D'ITALIA used this kind of overfeeding, able to confer a sudden reply even at low speed and a very high torque, so much necessary both in track and in the tortuous rally roads. The advantage offered by this solution is the possibility to compress the fuel mixed to the air through a lobes system and to increase its power in the combustion phase. The fuel is lodged in two side fuel tanks of aeronautical conception, each one of 35 liters ability and sent to the WEBER DCVNH15/250 twin-choke carburettor, through a low pressure electric pump. Furthermore the carburettor is endowed with partialization butterflies valves of 40 mms of fluid diameter and, being before of the volumetric compressor, it doesn't need the POP-OFF safety valve, instead present on the more powerful race version.

Engine lubrication is dry oil sump, as for the most part of the race cars. The circulation system is composed by three pumps, one of delivery and two of return, positioned in the inferior part of the cranckcase. The oil is practically always in circulation and when it reverts in the small cup in light alloy, situated on the inferior part of the engine, it is sucked in the two parallel pumps and sent in a cylindrical tank on the engine right side, near to the manifold exhausts. The delivery pump sucks the oil necessary to the lubrication, conducts it through the filter group and then the oil reaches the cooling system, situated in the anterior part of the car, and returns inside the engine to lubricate the movements parts. The pressure of the circuit is always constant and the value is attested around the 4/4.5 bars, while the system ability is about 8 liters.



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