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      07-11-2009, 01:44 PM   #2
Zeph
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Drives: 2008 E92 335i 6MT SGM CR/BD
Join Date: Jul 2008
Location: Southeast USA

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I am curious to this as well, why is 9psi "harder on the turbos" @ 6k RPM as opposed to 4K RPM? I mean unless they are just saying by the time you go from 3K to 6K you have been maxing the turbos for a few seconds already, thus building up too much heat? It almost seems like it would be easier to hit high boost at higher RPM's due to increased exhaust pressure/heat/speed? That plus wouldn't the engine be "wanting" more air at higher RPM?
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