Le Mans motorcycle exhausts

Thursday, July 04, 2013
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Endurance racing has much to recommend it as a spectacle, and it is a pity that there aren’t more countries holding 24-hour races. I have been to all kinds of motorsport events, and there is little to compete with the atmosphere of racing takin... read more
Tags :  exhausts

The gasoline direct injector

Thursday, July 04, 2013
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The benefits of injecting fuel directly into the cylinder have been understood for many years, but so too have the technical difficulties. Better volumetric efficiency and the ability to inject the fuel exactly where it is wanted at precisely the cor... read more
Tags :  fuel-system

Cotton-based filters

Thursday, July 04, 2013
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If you’ve ever examined the contents of the dirty side of the air filter of your daily transport you don’t need me to emphasise the importance of the filter on the engine air intake. Grit, dead leaves and even quite large insects can all ... read more
Tags :  induction-system

Oil aeration

Thursday, July 04, 2013
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Oil aeration can be a major problem in high-revving race engines. The presence of oil bubbles in significant quantities in an engine’s oil can lead to pressure loss and damaging cavitation in the oil pump. Controlling the issue is a multi-facet... read more
Tags :  oil-system

Piston pin design features

Thursday, July 04, 2013
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In its most basic form the piston pin is simply a piece of round bar. However, very few engines – other than very basic, low-budget units – are equipped with solid gudgeon pins as standard. Of course, in the rarified world of racing, ther... read more
Tags :  pistons-rings

Data logging

Thursday, July 04, 2013
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No matter how good your engine dynamometer may be, it is all but useless without the necessary data logging equipment. There is a plethora of different data logging systems available to engine builders, providing all of the functionality they could w... read more
Tags :  test-equipment

Dual-clutch transmissions

Thursday, July 04, 2013
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For many years, sequential transmissions using dog engagement have been the standard fitment for most serious racing machinery, thanks largely to their durability and short shifting time. However, Seat’s latest Leon Cup touring car features a d... read more
Tags :  transmission

Preventing roller lifters from rotating

Thursday, July 04, 2013
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An important element in improving engine performance is the optimisation of the valve lift curve to maximise the mass of trapped charge in the engine. In an engine with an overhead valve (pushrod) valvetrain, the change from flat-faced lifters (also ... read more
Tags :  valvetrain
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