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Old 10-01-2008, 09:44 AM
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chaz58 chaz58 is offline
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Direct injection twin turbo engines like the 335 or 123 don't have much of any lag. If you go to a single turbocharger and lose the direct injection, yeah you will have some. Direct injection seems to make the biggest difference - a single turbo with direct injection reacts very fast. A twin turbo without direct injection will have more lag, and then a single turbo without direct injection will have the most lag. (It also depends on the size of the turbo and the amount of boost - but I believe stock BMW's don't have large high boost turbos).
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