Jb4 (n54) tune questions

Saaaan1 · 07-14-2021, 05:07 PM

I am thinking about purchasing this modification, but I have a few questions. To start, my car is a 2008 e92 335xi coupe (n54) with sport package (not sure if that makes a difference). What exactly will this tune do to my car? I know how to install it, but am confused as to how to alter the settings in order to get the "100 bhp increase". The jb4 tune is sold on Amazon, but I'm not sure if there's an interface to change the boost settings. I don't want my car to be unreliable, but I'm aware that it becomes less reliable with this tune. I'm sitting at 300 bhp. All internals are stock. How do I configure this jb4 to make my car 400 bhp? How much boost? Thanks.

Kevin39 · 07-14-2021, 05:28 PM

You can switch between maps and a few different things with the steering wheel buttons. There's other stuff you can change with a USB cable and a laptop or if you buy the Bluetooth with the JB4, you can change things with the JB4 app on your phone. I would buy it from BMS instead of Amazon but that's just me.

This is the N55 section so you may get more accurate answers posting over in the N54 group

07-14-2021, 05:07 PM	#1
Saaaan1 New Member 0 Rep 7 Posts Drives: BMW 335xi coupe Join Date: Jul 2021 Location: Chicago iTrader: (0)	Jb4 (n54) tune questions I am thinking about purchasing this modification, but I have a few questions. To start, my car is a 2008 e92 335xi coupe (n54) with sport package (not sure if that makes a difference). What exactly will this tune do to my car? I know how to install it, but am confused as to how to alter the settings in order to get the "100 bhp increase". The jb4 tune is sold on Amazon, but I'm not sure if there's an interface to change the boost settings. I don't want my car to be unreliable, but I'm aware that it becomes less reliable with this tune. I'm sitting at 300 bhp. All internals are stock. How do I configure this jb4 to make my car 400 bhp? How much boost? Thanks.
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07-14-2021, 05:28 PM	#2
Kevin39 Lieutenant 164 Rep 411 Posts Drives: 2011 E90 N55 Join Date: Feb 2016 Location: Indiana iTrader: (0)	You can switch between maps and a few different things with the steering wheel buttons. There's other stuff you can change with a USB cable and a laptop or if you buy the Bluetooth with the JB4, you can change things with the JB4 app on your phone. I would buy it from BMS instead of Amazon but that's just me. This is the N55 section so you may get more accurate answers posting over in the N54 group
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