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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > New to jb4 n55



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      07-11-2013, 12:36 AM   #1
Deez335xi
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New to jb4 n55

Got the jb4 stage 2 ISO for my n55 , installing Friday,...was told that the maps are different w ISO, is that right?? Didn't see any difference on the n54 sticky
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      07-11-2013, 12:57 PM   #2
hetzle
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It just builds boost more smoothly, maps are the same as far as I know
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      07-11-2013, 01:44 PM   #3
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What you need to know is that Map 0 is not a true bypass map anymore. If you drive your car in Map 0 and use more than lets say 50% throttle you will get the half engine light. Your supposed to use map 4 if you want stock boost for everyday driving. And use Map 0 for when you take it in to the dealer only. Makes sense?
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      07-12-2013, 12:25 AM   #4
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      07-12-2013, 08:46 AM   #5
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Is Map 0 a true bypass where it cannot be electronically detected by the dealer?
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      07-12-2013, 10:24 AM   #6
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http://www.n54tech.com/forums/showthread.php?t=17800

Rd the general notes#3
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