New 2009 2010 BMW Z4 - ZPOST - View Single Post - JB4 N54 Stage 3 Tune

BMWM4 · 11-01-2011, 07:53 AM

and you have the 35is model? that strange because your probably running lower boost now. stock up to 14.5 psi in over boost jb4 without downpipes probably doesn't boost that high. So maybe more responsive but I don't know about over all speed,

11-01-2011, 07:53 AM	#2
BMWM4 First Lieutenant 28 Rep 335 Posts Drives: BMW M4 Join Date: May 2011 Location: Markham, Ontario iTrader: (1)	and you have the 35is model? that strange because your probably running lower boost now. stock up to 14.5 psi in over boost jb4 without downpipes probably doesn't boost that high. So maybe more responsive but I don't know about over all speed,
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