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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > Australia > jb4 2 step launch



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      10-01-2014, 05:11 AM   #1
335pm
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jb4 2 step launch

About to order jb4 was wondering if it already had 2 step or is that seperate?
How do i get 2 step launchig?
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      10-01-2014, 05:24 AM   #2
waterbottle1
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Seperate , it's an add on
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      10-01-2014, 05:27 AM   #3
Scotty89
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The JB4 comes with the option, but I believe you have to fit a "DIY circuit"?

http://www.1addicts.com/forums/showt...php?p=15717606
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      10-01-2014, 05:43 AM   #4
335pm
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Ive watched a few 335i 2 step limiter videos on youtube. Most of the cars piss out heaps of black smoke. Dosnt look to healthy for the car. What are your thoughts?
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      10-01-2014, 05:59 AM   #5
Scotty89
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Quote:
Originally Posted by 335pm View Post
Ive watched a few 335i 2 step limiter videos on youtube. Most of the cars piss out heaps of black smoke. Dosnt look to healthy for the car. What are your thoughts?
Yep even Terry from Burger Motorsports posted a thread and said they don't offer it as a kit because they can't guarantee how safe it is for your car.

Quote:
Originally Posted by Terry @ BMS
Here are a couple photos of what it takes. Keep in mind while supported this won't be an "official" feature as there is no way for us to quantify just how bad for your car this is. Somewhere between not a good idea and a really bad one.
They also stated that if you don't have carless down pipes, the excess fuel that the 2 step dumps will kill your catalytic converters straight up.

I guess it's up to whatever you want to do. Do you want to shoot flames and leave big stripes?
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      10-01-2014, 07:06 AM   #6
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Not sure about now. But back then I bought it , it was like $30 extra for it.
I installed my jb4 and realised I didn't jnstall the 2step. So it's just sitting in my trunk lol

And yeh YouTube that.
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      10-01-2014, 09:18 AM   #7
Stuart@BMRAutowerkes
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It's sold seperately.

Plug it in then activate it on the JB4 through the USB cable.

It's useful for:
a) drags (assuming you have enough grip)
b) shooting flames (exhaust permitting)
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      10-01-2014, 04:58 PM   #8
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Quote:
Originally Posted by _Adrenaline_
Im sure I could search, but does JB4 allow for a "launch control" tune, limiting boost/timing/etc?
No Launch control but you can reduce boost in 1st and 2nd gear. Very useful for launching off the line.
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      10-01-2014, 07:22 PM   #9
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Reminds me of bee-R rev limiter for nissan vehicles.

A friend blew his turbo when shooting flames doing this lol!
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