BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)


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      10-24-2011, 12:08 AM   #1
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Drives: 2012 135 Convertible
Join Date: Jun 2011
Location: Bethesda, MD

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Another Happy JB N55 Stage I Customer

#1. Shipping is FAST...I ordered on Thursday with normal shipping and found the box on my doorstep when I got home Saturday.

#2. Installation is straightforward but a bit of PITA due to dealing with a variety of clips and fasteners that can be difficult to put back together (i.e. the Aircon filter and cowl was a pain to re-fit, as was the lid on the ECU with the additional wire running into the box). I took a total time of about 2.5 hours double checking each step, although I'm sure that if I did this again it would be half that time. Once it was hooked up I got no CELs so taking my time paid off.

#3. (Most importantly) Performance is immediately noticeable...I've tuned prior cars (C5/GTO/SRT 8/Mustang) with handheld tuners/CA intakes and exhausts and the JB Stage 1 on its own (I have not changed anything else) is much more noticeable than any of the others for a fraction of their price. While there may be no replacement for displacement, mild turbos offer a great platform for juicing HP.

Overall: Very happy with the JB...huge bang for the buck.

Some others mentioned they felt the mod kick-in after the car was driven a couple of times. I finished the wiring last night and started the car for a few minutes in neutral as night fell (couldn't tell if the tuner had done anything but did confirm the installation was correct). This morning I re-assembled the bits I'd removed, drove the car and the change was immediately evident.

One tip: I thought the small control box might rattle around the ECU compartment so I velcroed it in...
2012 135i Convertible
2008 990 Adventure
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      10-24-2011, 02:49 PM   #2
SV Concepts II
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Glad you are happy with the JB. Thanks for sharing! Enjoy the added power
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      10-25-2011, 12:56 PM   #3
ModBargains IV
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Drives: e92 335i, 135i, E46 M3, 540i
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You should upgrade to the JB4 N55 Stage2 soon!
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      10-25-2011, 01:43 PM   #4
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Originally Posted by **********s IV View Post
You should upgrade to the JB4 N55 Stage2 soon!

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