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Archive

Exhausts for motorcycle rally raid competition

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Many of us are probably familiar with the fact that for many years there has been an event called the Paris-Dakar rally. It is often highlighted by the fact that it has been well supported by motor manufacturers as well as star drivers in the cars and buggies – famous names from rallying such as Ari Vatanen, Juha Kankunnen and Carlos Sainz, as well as circuit-racing specialists such as Henri Pescarolo, Jacky Ickx and Jean-Louis Schlesser. During the winter, when motorsport on TV is...

Prevention of fastener loosening part 1

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Threaded fasteners are an unavoidable part of building any engine. When we want to harness the energy contained in fuels, liberating this energy via a rapid series of small explosions, we need to be sure our engine assembly stays in one piece. The forces involved, and the rapid accumulation of damaging stress cycles, means we place great demands on bolted joints, and we need to know they are not going to come loose, as the consequences can be financially costly. The best way to ensure that...

The fuel tank and ethanol

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The use of ethanol in gasoline fuel has many benefits. Apart from its characteristics as an oxygenate and high-octane blending component, reducing the net amount of carbon dioxide into the atmosphere is clearly one of them. But while farmers have benefited as home-grown corn or biomass is fermented into alcohol, the real effect of adding ethanol to gasoline on the classic racing community has yet to take its full effect. So while the US authorities have already sanctioned the widespread...

Single and multiple throttles compared

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Back in my distant youth, before the invention of electronic fuel injection, the twin-choke carburettor was king. Replacing a single-choke constant depression unit or less complex single-choke carburettor – one feeding all the cylinders – an array of two or three of these twin-choke devices under the bonnet often impressed my mates. With one choke per cylinder, and feeding air directly from the atmosphere without a filter or airbox, the induction roar gave the impression of power...

Developing a Formula One oil pump system

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All Formula One cars, including the current generation with 1.6 litre turbocharged engines as well the previous V8s, feature dry-sump lubrication. The demands placed on the lubrication system in a Formula One car are extreme, with high temperatures and g-loadings making consistent oil supply a challenge. It is therefore worth looking at some of the methods used to ensure an optimal oil supply, while also ensuring maximum efficiency to minimise unnecessary losses. Taking as an example the...
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