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      03-02-2011, 02:59 PM   #85
unic66
Private First Class
Armenia
2
Rep
159
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Drives: 2008 E90 335i 6MT
Join Date: Dec 2010
Location: San Fernando Valley

iTrader: (1)

I think your JB4 map 2 is too aggressive!Without seeing your boost curve,my guess is that your piggyback or DME is tapering off your boost too quickly to safeguard your motor!
Is your car otherwise bone stock?