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Small end lubrication (2)

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In last month's article on connecting rods, I looked at a common way of providing lubrication to the small end of the connecting rod - drilling (or multiple drillings) into the small end of the rod. In many cases this is enough to supply lubrication of the small end. But there are many cases where this might prove inadequate. The oil entering the small end via these radial drillings has to find its way into the entry of the drilling (hence the generous chamfer provided), and the source...

Further thoughts on Crankshaft Oiling

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The previous article looked at the recent trend in crankshaft lubrication commonly known as the 'nose-feed' method. In that article, the basics of the concept were explained, along with some of the perceived advantages of using this method of providing lubrication to the connecting rod big ends and possibly the crankshaft main bearings too. When feeding the connecting rod's big-end bearings with oil in the 'conventional' manner of pumping in oil via the main bearing...

Time for a change

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In these times of political and economic upheavals around the world it seems there is an appetite for change in other areas of life as well. Suggestions for a revamp to the Formula One engine regulations could fill a whole book but it is the latest - including direct injection or gas turbine technology - that have really hit the headlines recently. For those with long memories, gas turbines were all the rage in the late 1960s and early '70s. Undeterred by the experiences of the Rover...

Elixir of life

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It is often said that water is the elixir of life. But when used as a coolant in a high-performance racing engine it can be the kiss of death instead. Let me explain. Ever since the invention of the 'heat' engine, limits to the properties of the metals used mean they have necessitated some kind of cooling. And since water is all around us, it makes sense to use this is a transport fluid to remove heat from the cylinder head and disperse it into the atmosphere. But water brings with...

Liner Distortion

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Spare a thought for the poor cylinder liner. As well as expecting it to be perfectly round from the outset, we then go on to expect it to remain so throughout the rest of its life, and under the most arduous conditions. But are we making it as round as it could be? Take for instance the typical case of a replacement dry liner. We'll measure its external diameter in at least three positions around its axis, and then again in another three places up and down the bore. Averaging these and...