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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Jb+ Should I Turn It Up ?



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      08-07-2009, 09:21 PM   #1
cmy35fly
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Question Jb+ Should I Turn It Up ?

hey guys i have the jb+ in my 09 335i and running default settings right now at 5. was thinking of turning it up to 7 what do you think ???
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      08-07-2009, 09:29 PM   #2
persian54
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I'm turning it up sunday

and I'll let you know :P
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      08-07-2009, 09:31 PM   #3
cmy35fly
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i really want to turn it up the only thing is i dont have a scan tool anyone running at 7 if so anycodes and can u tell a diff from default ?
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      08-08-2009, 01:39 AM   #4
imperium2000
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I turned mine up from default to about 7 about a month ago. The only subjective difference I can feel is that it seems more responsive at lower RPMs but no real difference at higher RPMs. It also depends on your gas. We only have 91octane here in California so there is little benefit to go higher.

I believe Terry produced some dynos some time back when the JB+ first came out and there is little benefit to turn it to 100% unless you use gas that's better than 93.

I've only seen 2 misfire codes when I floored it to 6000+ RPMs on hot 90F days. No other codes.
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      08-08-2009, 03:03 AM   #5
JayKay335i
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I turned it up to 75 on 93 octane. Hell of a difference and its awesome.
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      08-08-2009, 08:04 AM   #6
cmy35fly
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anyone know how much boost it will be at 75%
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      08-08-2009, 12:58 PM   #7
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25% more than at 50%. Depends on your altitude for exact numbers.
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      08-08-2009, 02:52 PM   #8
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If your running 93 you should just crank it up to 100 and do the solanoid bypass and just see if you can tell a difference. I have been running like that for months with no codes. You should really go ahead and get a BT scanner anyway. If you accidentally unplug the sensor when the ECU is awake the Dealer will know you have been tampering with the car unless you erase the code.
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      08-08-2009, 10:01 PM   #9
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Just cranked mine up a bit to the notch before 75% and put 93 octane. I only feel a small boost in power.
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      08-09-2009, 12:53 AM   #10
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just go to 100% u will never look back forget about the codes u bought the car to have fun and enjoy it right?



...u only live once!
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