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      03-28-2013, 08:18 PM   #1
Private First Class

Drives: 2008 e93 335i
Join Date: Apr 2007
Location: Rochester, NY

iTrader: (0)

Question about how JB+ operates

I'm considering the JB+ for my 335 cab. Yes I know it's not a "real tune" like Cobb or the JB4 but I'm interested in a modest bump in power. Does anyone know exactly how it works? From the searches I've done it appears that it fools the ECU into thinking the boost is actually lower than it really is. If this is so is there any harm that can come from this? Any concerns about the engine running too lean?