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      01-25-2013, 02:05 PM   #3
cvc 22349a
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Drives: 335i
Join Date: Sep 2007
Location: SF Bay

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^ true
OP-don't worry about your turbo working harder to make more boost to compensate for altitude. Unless you tune your ecu the turbo is operating within design limitations that have a margin of safety.
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2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, KW/M3 susp, Apex Arc 8, Mich PSS