Quote:
Originally Posted by z435is
it shouldn't cause a night and day difference at all since boost is pretty much the same. however the IS models have the sport feature (I'm not sure if normal z4 35i's have it to) but that is a night and day difference between normal mode and sport mode, it is a huge difference. I think the jb4 automatically makes it as if it is running on sport mode, and thats why people feel like its a night and day difference but its really the same as stock but jacked up to sport ... IMHO
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True except when on jb4 and using sport+ mode, the "rush" is even greater than stock with sport +
The only thing I dislike is using jb4 or stock, the throttle lag is still evident.