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diminished horespower in rebuilds
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I have noticed a trend in European diesel manufacturers switching from single large turbochargers of the past to multiple smaller turbo chargers operating in stages. This is supposed to make turbocharging more responsive to part load conditions. <br /> <br />The newest trend is smaller turbochargers that are simply replacing a larger turbocharger because design advances have given the smaller unit the same capacity as the larger unit. <br /> <br />There have been many marine diesels built in history that are reversible and or capable of running on different numbers of cylinders. The most common mechanism for this is having the valve rockers pivot on a shaft of eccentrics that when rotated either raises or lowers the rockers onto their respective camshaft. For reversing, there may be either two separate camshafts - one for forward running, one for reverse; or a single camshaft with two sets of lobes.
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