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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+ quick questions



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      03-02-2009, 06:29 PM   #1
e92man
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jb+ quick questions

so im about to take the plunge on the jb+ and have a couple of questions.

1) How is the gas milage in comparison to stock?

2) i havent done any updates to the car since i got it in august of 07 because i know a salesman very well and requested that they do not update the car. will i be ok on my current software?
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      03-02-2009, 06:32 PM   #2
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Quote:
Originally Posted by e92man View Post
so im about to take the plunge on the jb+ and have a couple of questions.

1) How is the gas milage in comparison to stock?

2) i havent done any updates to the car since i got it in august of 07 because i know a salesman very well and requested that they do not update the car. will i be ok on my current software?

1) Close to the same. Has more to do with how you drive your car

2) This will work with pre 29.2 and 29.2 versions of software. But, if you have pre-29.2, you can boost even more.
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      03-02-2009, 07:09 PM   #3
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thank you. what u just told me about the software is very interesting.
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      03-02-2009, 07:18 PM   #4
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Quote:
Originally Posted by akira42 View Post
1) Close to the same. Has more to do with how you drive your car

2) This will work with pre 29.2 and 29.2 versions of software. But, if you have pre-29.2, you can boost even more.
Yep, I average about the same gas mileage.
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      03-02-2009, 07:19 PM   #5
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nice to hear. i really did not want to lose any gas milage considering the car is not the most gas friendly car around hahaha
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      03-02-2009, 11:11 PM   #6
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Good questions...

I have a few on my own.
1) how do i know what software my car is?
2) What levels of boost can i run with pre 29.2 and 29.2 versin?
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      03-02-2009, 11:44 PM   #7
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