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OP - Do you realize that there have been a few x35i engine failures running THAT much boost (18.5 psi). IF you look in the e90 forum you will find teh stick on the engine rebuild of the forum member who blew his engine when running that much boost.
I think I read that BMW only has provided maps in the DME for boost up to 14 psi.
I also think that only Giac has been able to program boost level higher than this 14 psi level. I think Giac has a "flash tune" that runs 16 psi or so.
IF I were you... I would be very worried when you are running that much boost on street pump gas. Esp since the juice box defeats the factory saftey features when you run the extra resistors to get up to 18 psi or more.
Dackel
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