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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+ settings



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      11-21-2009, 10:24 PM   #1
Fraggy
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JB+ settings

Well, my warranty is about 100 miles from expiring so its time to install the JB+ thats been sitting in my desk for months.

Which setting is right for me. I can only get 91 octane gas here in San Diego, and dont have any other mods except for Bastuck exhaust which I dont think helps with a tune at all.

I always thought 75% was correct, but recent reading has me thinking that 50% is where I should stay. I NEED reliability.

I wont do any bypassing either, makes me too nervous.
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      11-21-2009, 10:45 PM   #2
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With 91 octane and a mostly stock car I would recommend 50% setting (default) Just install and enjoy

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      11-21-2009, 11:20 PM   #3
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Thanks Mike, whats the max boost at 50%?
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      11-22-2009, 12:00 AM   #4
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Quote:
Originally Posted by Fraggy View Post
Thanks Mike, whats the max boost at 50%?
+2.75 psi.

i would go to 75% and solenoid bypass.
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      11-22-2009, 01:01 AM   #5
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Thanks man, but the bypass is the main reason I go rid of the JB2, it just made me too worried. I know its crazy, but when you dont understand stuff, its better to stay normal
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      11-22-2009, 01:17 AM   #6
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Quote:
Originally Posted by Fraggy View Post
Thanks man, but the bypass is the main reason I go rid of the JB2, it just made me too worried. I know its crazy, but when you dont understand stuff, its better to stay normal
I understand.
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      11-22-2009, 10:18 AM   #7
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Quote:
Originally Posted by Fraggy View Post
Thanks Mike, whats the max boost at 50%?
about 2.75PSI

have fun and enjoy the tune

Mike
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      11-16-2010, 02:48 AM   #8
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will 2.75 boos makes a big difference? will i feel it?
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      11-16-2010, 08:33 AM   #9
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will 2.75 boos makes a big difference? will i feel it?
Does a bear shit in the woods?
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      11-16-2010, 11:46 PM   #10
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Definitely stick with 50% to err on the side of caution. Don't raise it any higher. You should be fine.
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