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Old 02-04-2008, 02:26 PM   #4 (permalink)
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Well...for diesels there is propane injection too, which acts mostly as a catalyst in the combustion process. You can safely add 20% power to an otherwise stock engine. Hence the potential to reduce engine size to acheive the same power output. From my understanding of gassers, propane is the diesel equivalent of hydrogen injection, the difference being that in diesels we don't try to generate the gas on the fly...we use an external tank.

There is no doubt that there are alternatives that have potential to increase FE, but sometimes they are not practical or safe enough to be used in OEM applications.
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